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1. Measurement of deeply virtual Compton scattering off $^{4}\mathrm{He}$ with the CEBAF Large Acceptance Spectrometer at Jefferson Lab

Author

Dupré, R., Hattawy, M., Baltzell, N.A., Bültmann, S., de Vita, R., El Alaoui, A., El Fassi, L., Egiyan, H., Girod, F.X., Guidal, M., Hafidi, K., Jenkins, D., Liuti, S., Perrin, Y., Stepanyan, S., Torayev, B., Voutier, E., Amaryan, M.J., Armstrong, W.R., Atac, H., Gayoso, C. Ayerbe, Barion, L., Battaglieri, M., Bedlinskiy, I., Benmokhtar, F., Bianconi, A., Biselli, A.S., Bondi, M., Bossù, F., Boiarinov, S., Briscoe, W.J., Bulumulla, D., Burkert, V., Carman, D.S., Carvajal, J.C., Caudron, M., Celentano, A., Chatagnon, P., Chesnokov, V., Chetry, T., Ciullo, G., Clary, B.A., Cole, P.L., Contalbrigo, M., Costantini, G., Crede, V., d'Angelo, A., Dashyan, N., Defurne, M., Deur, A., Diehl, S., Djalali, C., Ehrhart, M., Elouadrhiri, L., Eugenio, P., Fegan, S., Filippi, A., Forest, T.A., Ghandilyan, Y., Gilfoyle, G.P., Gothe, R.W., Griffioen, K.A., Hakobyan, H., Hayward, T.B., Hicks, K., Hobart, A., Holtrop, M., Ilieva, Y., Ireland, D.G., Isupov, E.L., Jo, H.S., Joo, K., Joosten, S., Keller, D., Khachatryan, G., Khanal, A., Khandaker, M., Kim, A., Kim, W., Kripko, A., Kubarovsky, V., Kuhn, S.E., Lanza, L., Livingston, K., Kabir, M.L., Leali, M., Lenisa, P., Macgregor, I.J.D., Marchand, D., Markov, N., Mascagna, V., Mayer, M., Mckinnon, B., Mirazita, M., Mokeev, V.I., Neupane, K., Niccolai, S., O'Connell, T.R., Osipenko, M., Paolone, M., Pappalardo, L.L., Paremuzyan, R., Pasyuk, E., Payette, D., Phelps, W., Pivnyuk, N., Pogorelko, O., Poudel, J., Prok, Y., Ripani, M., Ritman, J., Rizzo, A., Rosner, G., Rossi, P., Rowley, J., Sabatié, F., Salgado, C., Schmidt, A., Schumacher, R., Sergeyeva, V., Sharabian, Y., Shrestha, U., Sokhan, D., Soto, O., Sparveris, N., Strakovsky, I.I., Strauch, S., Tyler, N., Ungaro, M., Venturelli, L., Voskanyan, H., Vossen, A., Watts, D., Wei, K., Wei, X., Weinstein, L.B., Wishart, R., Wood, M.H., Yale, B., Zachariou, N., Zhang, J., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and CLAS

Subjects
photon, nucleus: structure function, Compton scattering: form factor, suppression, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], coherence, time projection chamber, CLAS: upgrade, deeply virtual Compton scattering, calorimeter, electron: beam, spin: asymmetry, enhancement, Jefferson Lab, acceptance
Abstract

International audience; We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off He4 using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab using a 6 GeV longitudinally polarized electron beam incident on a pressurized He4 gaseous target. We detail the method used to ensure the exclusivity of the measured reactions, in particular the upgrade of CLAS with a radial time projection chamber to detect the low-energy recoiling He4 nuclei and an inner calorimeter to extend the photon detection acceptance at forward angles. Our results confirm the theoretically predicted enhancement of the coherent (eHe4→e′He4′γ′) beam spin asymmetries compared to those observed on the free proton, while the incoherent (eHe4→e′p′γ′X′) asymmetries exhibit a 30% suppression. From the coherent data, we were able to extract, in a model-independent way, the real and imaginary parts of the only He4 Compton form factor, HA, leading the way toward 3D imaging of the partonic structure of nuclei.

Published
2021

2. Measurement of deeply virtual Compton scattering off He4 with the CEBAF Large Acceptance Spectrometer at Jefferson Lab

Author

Dupré, R., Hattawy, M., Baltzell, N.A., Bültmann, S., De Vita, R., El Alaoui, A., El Fassi, L., Egiyan, H., Girod, F.X., Guidal, M., Hafidi, K., Jenkins, D., Liuti, S., Perrin, Y., Stepanyan, S., Torayev, B., Voutier, E., Amaryan, M.J., Armstrong, W.R., Atac, H., Gayoso, C. Ayerbe, Barion, L., Battaglieri, M., Bedlinskiy, I., Benmokhtar, F., Bianconi, A., Biselli, A.S., Bondi, M., Bossù, F., Boiarinov, S., Briscoe, W.J., Bulumulla, D., Burkert, V., Carman, D.S., Carvajal, J.C., Caudron, M., Celentano, A., Chatagnon, P., Chesnokov, V., Chetry, T., Ciullo, G., Clary, B.A., Cole, P.L., Contalbrigo, M., Costantini, G., Crede, V., D'Angelo, A., Dashyan, N., Defurne, M., Deur, A., Diehl, S., Djalali, C., Ehrhart, M., Elouadrhiri, L., Eugenio, P., Fegan, S., Filippi, A., Forest, T.A., Ghandilyan, Y., Gilfoyle, G.P., Gothe, R.W., Griffioen, K.A., Hakobyan, H., Hayward, T.B., Hicks, K., Hobart, A., Holtrop, M., Ilieva, Y., Ireland, D.G., Isupov, E.L., Jo, H.S., Joo, K., Joosten, S., Keller, D., Khachatryan, G., Khanal, A., Khandaker, M., Kim, A., Kim, W., Kripko, A., Kubarovsky, V., Kuhn, S.E., Lanza, L., Livingston, K., Kabir, M.L., Leali, M., Lenisa, P., Macgregor, I.J.D., Marchand, D., Markov, N., Mascagna, V., Mayer, M., Mckinnon, B., Mirazita, M., Mokeev, V.I., Neupane, K., Niccolai, S., O'Connell, T.R., Osipenko, M., Paolone, M., Pappalardo, L.L., Paremuzyan, R., Pasyuk, E., Payette, D., Phelps, W., Pivnyuk, N., Pogorelko, O., Poudel, J., Prok, Y., Ripani, M., Ritman, J., Rizzo, A., Rosner, G., Rossi, P., Rowley, J., Sabatié, F., Salgado, C., Schmidt, A., Schumacher, R., Sergeyeva, V., Sharabian, Y., Shrestha, U., Sokhan, D., Soto, O., Sparveris, N., Strakovsky, I.I., Strauch, S., Tyler, N., Ungaro, M., Venturelli, L., Voskanyan, H., Vossen, A., Watts, D., Wei, K., Wei, X., Weinstein, L.B., Wishart, R., Wood, M.H., Yale, B., Zachariou, N., Zhang, J., Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, and CLAS

Subjects
form factor, electron, photon, nucleus, imaging, suppression, GeV, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], spin, time projection chamber, coherence, deeply virtual Compton scattering, CLAS, calorimeter, beam, upgrade, structure, Compton scattering, enhancement, asymmetry, acceptance, Jefferson Lab
Abstract

International audience; We report on the measurement of the beam spin asymmetry in the deeply virtual Compton scattering off He4 using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab using a 6 GeV longitudinally polarized electron beam incident on a pressurized He4 gaseous target. We detail the method used to ensure the exclusivity of the measured reactions, in particular the upgrade of CLAS with a radial time projection chamber to detect the low-energy recoiling He4 nuclei and an inner calorimeter to extend the photon detection acceptance at forward angles. Our results confirm the theoretically predicted enhancement of the coherent (eHe4→e′He4′γ′) beam spin asymmetries compared to those observed on the free proton, while the incoherent (eHe4→e′p′γ′X′) asymmetries exhibit a 30% suppression. From the coherent data, we were able to extract, in a model-independent way, the real and imaginary parts of the only He4 Compton form factor, HA, leading the way toward 3D imaging of the partonic structure of nuclei.

Published
2021

3. Measurement of the Sigma pi photoproduction line shapes near the Lambda(1405)

Author

Moriya, K., Schumacher, R.A., Adhikari, K.P., Adikaram, D., Aghasyan, M., Anderson, M.D., Anefalos Pereira, S., Ball, J., Baltzell, N.A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bellis, M., Biselli, A.S., Bono, J., Boiarinov, S., Briscoe, W.J., Burkert, V.D., Carman, D.S., Celentano, A., Chandavar, S., Charles, G., Cole, P.L., Collins, P., Crede, V., D'Angelo, A., Dashyan, N., De Sanctis, E., De Vita, R., Deur, A., Dey, B., Djalali, C., Doughty, D., Dupre, R., Egiyan, H., El Fassi, L., Eugenio, P., Fedotov, G., Fegan, S., Fersch, R., Fleming, J.A., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gohn, W., Golovatch, E., Gothe, R.W., Griffioen, K.A., Guidal, M., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Heddle, D., Hicks, K., Ho, D., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jo, H.S., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F.J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuleshov, S.V., Kvaltine, N.D., Livingston, K., Lu, H.Y., Macgregor, I.J.D., Markov, N., Mayer, M., Mccracken, M., Mckinnon, B., Mestayer, M.D., Meyer, C.A., Mirazita, M., Mineeva, T., Mokeev, V., Montgomery, R.A., Munevar, E., Munoz Camacho, C., Nadel-Turonski, P., Nasseripour, R., Nepali, C.S., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Pappalardo, L.L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Phelps, E., Phillips, J.J., Pisano, S., Pivnyuk, N., Pogorelko, O., Pozdniakov, S., Price, J.W., Procureur, S., Protopopescu, D., Rimal, D., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, P., Sabatié, F., Saini, M.S., Salgado, C., Schott, D., Seder, E., Seraydaryan, H., Sharabian, Y.G., Smith, E.S., Smith, G.D., Sober, D.I., Stepanyan, S.S., Stepanyan, S., Stoler, P., Strakovsky, I.I., Strauch, S., Taiuti, M., Tang, W., Taylor, S., Taylor, C.E., Tian, Ye, Tkachenko, S., Torayev, B., Ungaro, M., Vernarsky, B., Vlassov, A.V., Voskanyan, H., Voutier, E., Walford, N.K., Watts, D.P., Weygand, D.P., Williams, M., Zachariou, N., Zana, L., Zhang, J., Zhao, Z.W., Zonta, I., Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), CLAS, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)

Subjects
BARYONS, KAON-NUCLEON INTERACTIONS, CHIRAL DYNAMICS, QUARK-MODEL, RESONANCES, STATES, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Settore FIS/04 - Fisica Nucleare e Subnucleare, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The reaction gamma + p -> K+ + Sigma + pi was used to determine the invariant mass distributions or "line shapes" of the Sigma+ pi-, Sigma- pi+ and Sigma0 pi0 final states, from threshold at 1328 MeV/c^2 through the mass range of the Lambda(1405) and the Lambda(1520). The measurements were made with the CLAS system at Jefferson Lab using tagged real photons, for center-of-mass energies 1.95 < W < 2.85 GeV. The three mass distributions differ strongly in the vicinity of the I=0 ��(1405), indicating the presence of substantial I=1 strength in the reaction. Background contributions to the data from the Sigma0(1385) and from K^* Sigma production were studied and shown to have negligible influence. To separate the isospin amplitudes, Breit-Wigner model fits were made that included channel-coupling distortions due to the NKbar threshold. A best fit to all the data was obtained after including a phenomenological I=1, J^P = 1/2^- amplitude with a centroid at 1394\pm20 MeV/c^2 and a second I=1 amplitude at 1413\pm10 MeV/c^2. The centroid of the I=0 Lambda(1405) strength was found at the Sigma pi threshold, with the observed shape determined largely by channel-coupling, leading to an apparent overall peak near 1405 MeV/c^2., Figure got replaced during submission, fixed

Published
2013

4. Search for the Photoexcitation of Exotic Mesons in the pi+pi+pi- System

Author

Nozar, M., Salgado, C., P. Weygand, D., Guo, L., Adams, G., Li, J., Eugenio, P., J. Amaryan, M., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., P. Ball, J., Baltzell, N.A., Barrow, S., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., L. Berman, B., S. Biselli, A., Blaszczyk, L., E. Bonner, B., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., J. Briscoe, W., K. Brooks, W., Bültmann, S., D. Burkert, V., Butuceanu, C., R. Calarco, J., L. Careccia, S., S. Carman, D., Carnahan, B., Casey, L., Cazes, A., Chen, Si, Cheng, L., L. Cole, P., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Crede, V., P. Cummings, J., Dale, D., Dashyan, N., De Masi, R., De Vita, R., De Sanctis, E., V. Degtyarenko, P., Denizli, H., Dennis, L., Deur, A., V. Dharmawardane, K., S. Dhuga, K., Dickson, R., Djalali, C., E. Dodge, G., Doughty, D., Dugger, M., Dytman, S., P. Dzyubak, O., Egiyan, H., S. Egiyan, K., El Fassi, L., Elouadrhiri, L., Fatemi, R., Fedotov, G., J. Feuerbach, R., Forest, T.A., Fradi, A., Funsten, H., Garçon, M., Gavalian, G., Gevorgyan, N., P. Gilfoyle, G., L. Giovanetti, K., X. Girod, F., T. Goetz, J., W. Gothe, R., A. Griffioen, K., Guidal, M., Guillo, M., Guler, N., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hanretty, C., Hardie, J., Hassall, N., Heddle, D., W. Hersman, F., Hicks, K., Hleiqawi, I., Holtrop, M., E. Hyde-Wright, C., Ilieva, Y., G. Ireland, D., S. Ishkhanov, B., L. Isupov, E., M. Ito, M., Jenkins, D., S. Jo, H., R. Johnstone, J., Joo, K., G. Juengst, H., Kalantarians, N., D. Kellie, J., Khandaker, M., Kim, W., Klein, A., J. Klein, F., Kossov, M., Krahn, Z., H. Kramer, L., Kubarovsky, V., Kuhn, J., E. Kuhn, S., V. Kuleshov, S., Kuznetsov, V., Lachniet, J., M. Laget, J., Langheinrich, J., Lawrence, D., Livingston, K., Y. Lu, H., MacCormick, M., Markov, N., Mattione, P., McAleer, S., Mckinnon, B., W. C. Mcnabb, J., A. Mecking, B., Mehrabyan, S., D. Mestayer, M., Meyer, C.A., Mibe, T., Mikhailov, K., Mirazita, M., Miskimen, R., Mokeev, V., Moreno, B., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., S. Mutchler, G., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., B. Niczyporuk, B., R. Niroula, M., A. Niyazov, R., V. O'Rielly, G., Osipenko, M., I. Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Anefalos Pereira, S., Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Popa, I., Pozdniakov, S., M. Preedom, B., W. Price, J., Prok, Y., Protopopescu, D., M. Qin, L., A. Raue, B., Riccardi, G., Ricco, G., Ripani, M., G. Ritchie, B., Ronchetti, F., Rosner, G., Rossi, P., D. Rubin, P., Sabatié, F., Salamanca, J., P. Santoro, J., Sapunenko, V., A. Schumacher, R., S. Serov, V., G. Sharabian, Y., Sharov, D., V. Shvedunov, N., V. Skabelin, A., S. Smith, E., C. Smith, L., I. Sober, D., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., E. Stokes, B., Stoler, P., I. Strakovsky, I., Strauch, S., Taiuti, M., J. Tedeschi, D., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Ungaro, M., F. Vineyard, M., V. Vlassov, A., P. Watts, D., B. Weinstein, L., Williams, M., Wolin, E., H. Wood, M., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., W. Zhao, Z., Collaboration), (clas, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CLAS, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
High Energy Physics - Experiment (hep-ex), FOS: Physical sciences, Physics and Astronomy(all), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], High Energy Physics - Experiment
Abstract

A search for exotic mesons in the $\pi^{+}\pi^{+}\pi^{-}$ system photoproduced by the charge exchange reaction $\gamma p\to \pi^{+}\pi^{+}\pi^{-}(n)$ was carried out by the CLAS collaboration at Jefferson Lab. A tagged-photon beam with energies in the 4.8 to 5.4 GeV range, produced through bremsstrahlung from a 5.744 GeV electron beam, was incident on a liquid-hydrogen target. A Partial Wave Analysis (PWA) was performed on a sample of 83,000 events, the highest such statistics to date in this reaction at these energies. The main objective of this study was to look for the photoproduction of an exotic $J^{PC} = 1^{-+}$ resonant state in the 1 to 2 GeV mass range. Our PWA analysis, based on the isobar model, shows production of the $a_{2}(1320)$ and the $\pi_{2}(1670)$ mesons, but no evidence for the $a_{1}(1260)$, nor the $\pi_{1}(1600)$ exotic state at the expected levels. An upper limit of 13.5 nb is determined for the exotic $\pi_1(1600)$ cross section, less than 2% of the $a_2(1320)$ production., Comment: 6 pages, 5 figures, to be submitted to Phys.Rev.Lett

Published
2009

5. Polarized structure function sigma(')(LT) for (1)H((e)over-right-arrow,e(')K(+))Lambda in the nucleon resonance region

Author

Nasseripour, R., Raue, B.A., Carman, D. S., Ambrozewicz, P., Amaryan, M.J., Anciant, E., Anghinolfi, M., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N. A., Barrow, S., Battaglieri, M., Beard, K., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B. L., Biselli, A.S., Blaszczyk, L., Bonner, B.E., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W. J., Brooks, W.K., Burkert, V.D., Butuceanu, C., Calarco, J.R., Careccia, S.L., Casey, L., Cetina, C., Chen, Si, Cheng, L., Cole, P.L., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crede, V., Dale, D., Dashyan, N., De Masi, R., De Vita, R., De Sanctis, E., Degtyarenko, P.V., Dennis, L., Deur, A., Dhuga, K.S., Dickson, R., Djalali, C., Dodge, G.E., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., Egiyan, K.S., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., Feuerbach, R.J., Forest, T.A., Fradi, A., Funsten, H., Garccon, M., Gavalian, G., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girard, Pascal, Girod, F.X., Goetz, J. T., Gothe, R.W., Griffioen, K.A., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hafidi, K., Hakobyan, H., Hanretty, C., Hardie, J., Heddle, D., Hersman, F.W., Hicks, K., Hleiqawi, I., Holtrop, M., Hu, J., Hyde-Wright, C.E., Llieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Ito, M.M., Jenkins, D., Jo, H.S., Johnstone, J.R., Joo, K., Juengst, H.G., Kalantarians, N., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Kossov, M., Krahn, Z., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuhn, S.E., Kuleshov, S.V., Kuznetsov, V., Lachniet, J., Laget, J.M., Langheinrich, J., Lawrence, D., Livingston, K., Lu, H.Y., Lukashin, K., Mac Cormick, M., Manak, J.J., Markov, N., Mattione, P., Mc Aleer, S., Mc Kinnon, B., Mc Nabb, Jwc, Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Moreno, B., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., Mutchler, G.S., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., Osipenko, M., Ostrovidov, A.I., Park, K., Pasyuk, E., Paterson, C., Pereira, S.A., Peterson, G., Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., Preedom, B.M., Price, J.W., Procureur, S., Prok, Y., Protopopescu, D., Qin, L.M., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, Philippe, Rubin, P.D., Sabatie, F., Salamanca, J., Salgado, C., Santoro, J.P., Sapunenko, V., Sayre, D., Schumacher, R.A., Serov, V.S., Shafi, A., Sharabian, Y.G., Sharov, D., Shvedunov, N.V., Simionatto, S., Skabelin, A.V., Smith, E.S., Smith, L.C., Sober, D.I., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strakovsky, I.I., Strauch, S., Taiuti, M., Taylor, S., Tedeschi, D.J., Thompson, R., Tkabladze, A., Tkachenko, S., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Watts, D.P., Weinstein, L.B., Weygand, D.P., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Yun, J., Zana, L., Zhang, J., Zhao, B., Zhao, Z. W., Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de mécanique des sols, structures et matériaux (MSSMat), CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Cambridge Arctic Shelf Programme (CASP), University of Cambridge [UK] (CAM), Smart Engineering Asset Management Laboratory, City University of Hong Kong [Hong Kong] (CUHK), Department of Electrical Engineering [Korea Advanced Institute of Science and Technology] (KAIST), Korea Advanced Institute of Science and Technology (KAIST), Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Bureau de Recherches Géologiques et Minières (BRGM) (BRGM), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

International audience; The first measurements of the polarized structure function σLT′ for the reaction p(e⃗ ,e′K+)Λ in the nucleon resonance region are reported. Measurements are included from threshold up to W=2.05 GeV for central values of Q2 of 0.65 and 1.00 GeV2, and nearly the entire kaon center-of-mass angular range. σLT′ is the imaginary part of the longitudinal-transverse response and is expected to be sensitive to interferences between competing intermediate s-channel resonances, as well as resonant and non-resonant processes. The results for σLT′ are comparable in magnitude to previously reported results from CLAS for σLT, the real part of the same response. An intriguing sign change in σLT′ is observed in the high Q2 data at W≈1.9 GeV. Comparisons to several existing model predictions are shown.

Published
2008

6. Electroproduction of $\phi(1020)$ Mesons at High $Q^2$ with CLAS

Author

Santoro, J. P., Smith, E. S., Garçon, M., Guidal, M., Laget, J. M., Weiss, C., Adams, G., Amaryan, M.J., Anghinolfi, M., Asryan, G., Audit, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J., Ball, J.P., Baltzell, N.A., Barrow, S., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B.L., Biselli, A.S., Blaszczyk, L., Bonner, B.E., Bookwalter, C., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., B¨ultmann, S., Burkert, V.D., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carman, D.S., Casey, L., Cazes, A., Chen, Si, Cheng, L., Cole, P.L., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Crede, V., Cummings, J.P., Dale, D., Dashyan, N., De Masi, R., De Sanctis, E., De Vita, R., Degtyarenko, P.V., Denizli, H., Dennis, L., Deur, A., Dhamija, S., Dharmawardane, K.V., Dhuga, K.S., Dickson, R., Djalali, C., Dodge, G.E., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., Egiyan, K.S., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fatemi, R., Fedotov, G., Feuerbach, R.J., Ficenec, J., Forest, T.A., Fradi, A., Funsten, H., Gavalian, G., Gevorgyan, N., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gohn, W., Gordon, C.I.O., Gothe, R.W., Graham, L., Griffioen, K.A., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hanretty, C., Hardie, J., Hassall, N., Heddle, D., F.W. Hersman, §, Hicks, K., Hleiqawi, I., Holtrop, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Ito, M.M., Jenkins, D., Jo, H.S., Johnstone, J.R., Joo, K., Juengst, H.G., Kalantarians, N., Keller, D., Kellie, J.D., Khandaker, M., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Kossov, M., Krahn, Z., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuhn, S.E., Kuleshov, S.V., Kuznetsov, V., Lachniet, J., Langheinrich, J., Lawrence, D., Li, Ji, Livingston, K., Lu, H.Y., MacCormick, M., Marchand, C., Markov, N., Mattione, P., McAleer, S., Mckinnon, B., McNabb, J.W.C., Mecking, B.A., Mehrabyan, S., Melone, J.J., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Morand, L., Moreno, B., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., Mutchler, G.S., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Osipenko, M., Ostrovidov, A.I., Park, K., Park, S., Pasyuk, E., Paterson, C., Anefalos Pereira, S., Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Popa, I., Pozdniakov, S., Preedom, B.M., Price, J.W., Procureur, S., Prok, Y., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, P., Sabatié, F., Saini, M.S., Salamanca, J., Salgado, C., Sapunenko, V., Schott, D., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Sharov, D., Shvedunov, N.V., Skabelin, A.V., Smith, L.C., Sober, D.I., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strakovsky, I.I., Strauch, S., Taiuti, M., Tedeschi, D.J., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Watts, D.P., Weinstein, L.B., Weygand, D.P., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Yurov, M., Zana, L., Zhang, J., Zhao, B., Zhao, Z.W., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CLAS, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, 13.60.Le, 12.40.Nn, 12.40.Vv, 25.30.Rw
Abstract

To be submitted to Phys Rev C, 15 pages, 18 figures; International audience; Electroproduction of exclusive $\phi$ vector mesons has been studied with the CLAS detector in the kinematical range $1.6\leq Q^2\leq 3.8$ GeV$^{2}$, $0.0\leq t^{\prime}\leq 3.6$ GeV$^{2}$, and $2.0\leq W\leq 3.0$ GeV. The scaling exponent for the total cross section as $1/(Q^2+M_{\phi}^2)^n$ was determined to be $n=2.49\pm 0.33$. The slope of the four-momentum transfer $t'$ distribution is $b_{\phi}=0.98 \pm 0.17$ GeV$^{-2}$. The data are consistent with the assumption of s-channel helicity conservation (SCHC). Under this assumption, we determine the ratio of longitudinal to transverse cross sections to be $R=0.86 \pm 0.24$. A 2-gluon exchange model is able to reproduce the main features of the data.

Published
2008

7. Cross Sections for the $\gamma p \to K^{*0}\Sigma^+$ Reaction at $E_\gamma = 1.7 - 3.0$ GeV

Author

Hleiqawi, I., Hicks, K., Carman, D., Mibe, T., Niculescu, G., Tkabladze, A., Amarian, M., Ambrozewicz, P., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N.A., Batourine, V., Battaglieri, M., Beard, K., Bedlinskiy, I., Bellis, M., Benmouna, N., Berman, B.L., Biselli, A.S., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Bültmann, S., Burkert, V.D., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carnahan, B., Chen, Si, Cole, P.L., Collins, P., Coltharp, P., Crabb, D., Crannell, H., Crede, V., Cummings, J.P., De Masi, R., De Vita, R., De Sanctis, E., Degtyarenko, P.V., Dennis, L., Deur, A., Djalali, C., Dickson, R., Dodge, G.E., Donnelly, J., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., Elouadrhiri, L., Eugenio, P., Fedotov, G., Feldman, G., Fersch, R., Feuerbach, R., Garçon, M., Gavalian, G., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gonenc, A., Gothe, R.W., Griffioen, K.A., Guidal, M., Guler, N., Guo, L., Gyurjyan, V., Hakobyan, R.S., Hardie, J., Heddle, D., Hersman, F.W., Holtrop, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Ito, M.M., Jenkins, D., Jo, H.S., Joo, K., H.G. Juengst, 9, Kalantarians, N., Kellie, J.D., Khandaker, M., Kim, K., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Kossov, M., Krahn, Z., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuhn, S.E., Kuleshov, S.V., Lachniet, J., Laget, J.M., Langheinrich, J., Lawrence, D., Li, J., Livingston, K., Lu, H., Lukashin, K., MacCormick, M., McAleer, S., Mckinnon, B., Mcnabb, J., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Moriya, K., Morrow, S.A., Moteabbed, M., Mutchler, G.S., Munevar, E., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., Osipenko, M., Ostrovidov, A.I., Park, K., Pasyuk, E., Paterson, C., Pierce, J., Pivnyuk, N., Pogorelko, O., Pozdniakov, S., B. Preedom, 19, Price, J.W., Prok, Y., Protopopescu, D., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rosner, G., Rossi, P., Sabatié, F., Salgado, C., Santoro, J.P., Sapunenko, V., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Smith, E.S., Smith, L.C., Sober, D.I., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strakovsky, I.I., Strauch, S., Taiuti, M., Taylor, S., Tedeschi, D.J., Thoma, U., Thompson, R., Todor, L., Tkachenko, S., Tur, C., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weinstein, L.B., Weygand, D.P., Whisnant, S., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., Zhao, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CLAS, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
High Energy Physics::Experiment, 13.60.-r,13.60.Le,13.60.Rj,14.40.Ev, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Differential cross sections for the reaction $\gamma p \to K^{*0} \Sigma^+$ are presented at nine bins in photon energy in the range from 1.7 to 3.0 GeV. The \kstar was detected by its decay products, $K^+\pi^-$, in the CLAS detector at Jefferson Lab. These data are the first \kstar photoproduction cross sections ever published over a broad range of angles. Comparison with a theoretical model based on the vector and tensor $K^*$-quark couplings shows good agreement with the data in general, after adjusting the model's two parameters in a fit to our data. Disagreement between the data at forward angles and the global angle-energy fit to the model suggests that the role of scalar $\kappa$ meson exchange in $t$-channel diagrams should be investigated., Comment: 7 pages, 5 figures, submitted to Phys. Rev. C (Rapid Commun.)

Published
2007

8. First Measurement of Beam-Recoil Observables $C_x$ and $C_z$ in Hyperon Photoproduction

Author

Bradford, Rk, Schumacher, Ra, Adams, G, Amaryan, Mj, Ambrozewicz, P, Anciant, E, Anghinolfi, Marco, Asavapibhop, B, Asryan, G, Audit, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, Jp, Baltzell, Na, Barrow, S, Batourine, V, Battaglieri, Marco, Beard, K, Bedlinskiy, I, Bektasoglu, M, Bellis, M, Benmouna, N, Berman, Bl, Bianchi, Nicola, Biselli, As, Bonner, Be, Bouchigny, S, Boiarinov, S, Branford, D, Briscoe, Wj, Brooks, Wk, Bultmann, S, Burkert, Vd, Butuceanu, C, Calarco, Jr, Careccia, Sl, Carman, Ds, Carnahan, B, Chen, S, Cole, Pl, Coleman, A, Collins, P, Coltharp, P, Cords, D, Corvisiero, Pietro, Crabb, D, Crannell, H, Crede, V, Cummings, Jp, De Masi, R, De Sanctis Enzo, De Vita Raffaella, Degtyarenko, Pv, Denizli, H, Dennis, L, Deur, A, Dharmawardane, Kv, Dickson, R, Djalali, C, Dodge, Ge, Donnelly, J, Doughty, D, Dragovitsch, P, Dugger, M, Dytman, S, Dzyubak, Op, Egiyan, H, Egiyan, Ks, El Fassi, L, Elouadrhiri, L, Empl, A, Eugenio, P, Fatemi, R, Fedotov, G, Feldman, Gerald, Feuerbach, Rj, Forest, Ta, Funsten, H, Garcon, M, Gavalian, G, Gilfoyle, Gp, Giovanetti, Kl, Girod, Fx, Goetz, Jt, Gonenc, A, Gothe, Rw, Griffioen, Ka, Guidal, M, Guillo, M, Guler, N, Guo, L, Gyurjyan, V, Hadjidakis, Cynthia, Hafidi, K, Hakobyan, H, Hakobyan, Rs, Hardie, J, Heddle, D, Hersman, Fw, Hicks, K, Hleiqawi, I, Holtrop, M, Hu, J, Huertas, M, Hyde Wright CE, Ilieva, Y, Ireland, Dg, Ishkhanov, Bs, Isupov, El, Ito, Mm, Jenkins, D, Jo, Hs, Joo, K, Juengst, Hg, Kalantarians, N, Kellie, Jd, Khandaker, M, Kim, Ky, Kim, K, Kim, W, Klein, A, Klein, Fj, Klusman, M, Kossov, M, Kramer, Lh, Kubarovsky, V, Kuhn, J, Kuhn, Se, Kuleshov, Sv, Lachniet, J, Laget, Jm, Langheinrich, J, Lawrence, D, Lima, Acs, Livingston, K, Lu, Hy, Lukashin, K, Maccormick, M, Manak, Jj, Marchand, C, Markov, N, Mcaleer, S, Mckinnon, B, Mcnabb, Jwc, Mecking, Ba, Mestayer, Md, Meyer, Ca, Mibe, T, Mikhailov, K, Mirazita, Marco, Miskimen, R, Mokeev, V, Moriya, K, Morrow, Sa, Moteabbed, M, Muccifora, Valeria, Mueller, J, Mutchler, Gs, Nadel Turonski, P, Napolitano, J, Nasseripour, R, Natasha, N, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, Bb, Niroula, Mr, Niyazov, Ra, Nozar, M, O'Rielly, Gv, Osipenko, Mikhail, Ostrovidov, Ai, Park, K, Pasyuk, E, Paterson, C, Philips, Sa, Pierce, J, Pivnyuk, N, Pocanic, D, Pogorelko, O, Polli, Ermanno, Popa, I, Pozdniakov, S, Preedom, Bm, Price, Jw, Prok, Y, Protopopescu, D, Qin, Lm, Quinn, Bp, Raue, Ba, Riccardi, G, Ricco, Giovanni, Ripani, Marco, Ritchie, Bg, Ronchetti, Federico, Rosner, G, Rossi, Patrizia, Rowntree, D, Rubin, Pd, Sabatie, F, Salamanca, J, Salgado Lopez Carlos Alberto, Santoro, Joseph, Sapunenko, Vladimir, Serov, Vs, Shafi, A, Sharabian, Yg, Shaw, J, Shvedunov, Nv, Simionatto, S, Skabelin, Av, Smith, Es, Smith, Lc, Sober, Di, Sokhan, D, Spraker, M, Stavinsky, A, Stepanyan, Ss, Stepanyan, S, Stokes, Be, Stoler, P, Strakovsky, Ii, Strauch, S, Taiuti, MAURO GINO, Taylor, S, Tedeschi, Dj, Thoma, U, Thompson, R, Tkabladze, A, Tkachenko, S, Todor, L, Tur, C, Ungaro, M, Vineyard, Mf, Vlassov, Av, Wang, K, Watts, Dp, Weinstein, Lb, Weller, H, Weygand, Dp, Williams Meurig Crispin Stowe, Wolin, E, Wood, Mh, Yegneswaran, A, Yun, J, Zana, L, Zhang, J, Zhao, B, Zhao, Zw, Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CLAS, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
POLARIZATION, BREMSSTRAHLUNG, PSEUDOSCALAR MESON PHOTOPRODUCTION, PHOTON ENERGIES, KAON PHOTOPRODUCTION, POLARIZATION, RESONANCES, SPIN, P(GAMMA, LAMBDA, BREMSSTRAHLUNG, K&LAMBDA, FOS: Physical sciences, P(GAMMA, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], LAMBDA, PSEUDOSCALAR MESON PHOTOPRODUCTION, SPIN, K&LAMBDA, PHOTON ENERGIES, 25.20.Lj, 13.40.-f, 13.60.Le, 14.20.Gk, KAON PHOTOPRODUCTION, Nuclear Experiment (nucl-ex), Nuclear Experiment, RESONANCES
Abstract

Spin transfer from circularly polarized real photons to recoiling hyperons has been measured for the reactions $\vec\gamma + p \to K^+ + \vec\Lambda$ and $\vec\gamma + p \to K^+ + \vec\Sigma^0$. The data were obtained using the CLAS detector at Jefferson Lab for center-of-mass energies $W$ between 1.6 and 2.53 GeV, and for $-0.85, Comment: 28 pages, 18 figures, Submitted to Physical Review C

Published
2007

9. $\pi^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV

Author

Dugger, M., G. Ritchie, B., P. Ball, J., Collins, P., Pasyuk, E., A. Arndt, R., J. Briscoe, W., I. Strakovsky, I., L. Workman, R., Adams, G., Amarian, M., Ambrozewicz, P., Anciant, E., Anghinolfi, M., Asavapibhop, B., Asryan, G., Audit, G., Avakian, H., Bagdasaryan, H., Baillie, N., Baltzell, N.A., Barrow, S., Battaglieri, M., Beard, K., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., L. Berman, B., Bianchi, N., S. Biselli, A., E. Bonner, B., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., K. Brooks, W., Bültmann, S., D. Burkert, V., Butuceanu, C., R. Calarco, J., L. Careccia, S., S. Carman, D., Carnahan, B., Chen, Si, L. Cole, P., Coleman, A., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., P. Cummings, J., De Sanctis, E., De Vita, R., V. Degtyarenko, P., Denizli, H., Dennis, L., Deur, A., V. Dharmawardane, K., S. Dhuga, K., Dickson, R., Djalali, C., E. Dodge, G., Donnelly, J., Doughty, D., Dragovitsch, P., Dytman, S., P. Dzyubak, O., Egiyan, H., S. Egiyan, K., Elouadrhiri, L., Empl, A., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., J. Feuerbach, R., Ficenec, J., Forest, T.A., Funsten, H., Garçon, M., Gavalian, G., P. Gilfoyle, G., L. Giovanetti, K., X. Girod, F., T. Goetz, J., W. Gothe, R., A. Griffioen, K., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., S. Hakobyan, R., Hardie, J., Heddle, D., W. Hersman, F., Hicks, K., Hleiqawi, I., Holtrop, M., Hu, J., Huertas, M., E. Hyde-Wright, C., Ilieva, Y., G. Ireland, D., S. Ishkhanov, B., M. Ito, M., Jenkins, D., S. Jo, H., Joo, K., G. Juengst, H., Kalantarians, N., D. Kellie, J., Khandaker, M., Y. Kim, K., Kim, K., Kim, W., Klein, A., J. Klein, F., V. Klimenko, A., Klusman, M., Kossov, M., Krahn, Z., H. Kramer, L., Kubarovsky, V., Kuhn, J., E. Kuhn, S., Kuznetsov, V., Lachniet, J., M. Laget, J., Langheinrich, J., Lawrence, D., Lee, T., C. S. Lima, A., Livingston, K., Lukashin, K., Manak, J.J., Marchand, C., C. Maximon, L., McAleer, S., Mckinnon, B., W. C. Mcnabb, J., A. Mecking, B., D. Mestayer, M., Meyer, C.A., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Moriya, K., Morrow, S.A., Muccifora, V., Mueller, J., S. Mutchler, G., Nadel-Turonski, P., Napolitano, J., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., B. Niczyporuk, B., Niroula, M., A. Niyazov, R., Nozar, M., V. O'Rielly, G., Osipenko, M., I. Ostrovidov, A., Park, K., Paterson, C., Philips, S.A., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., M. Preedom, B., W. Price, J., Prok, Y., Protopopescu, D., M. Qin, L., A. Raue, B., Riccardi, G., Ricco, G., Ripani, M., Ronchetti, F., Rosner, G., Rossi, P., Rowntree, D., D. Rubin, P., Sabatié, F., Slamanca, J., Salgado, C., P. Santoro, J., Sapunenko, V., A. Schumacher, R., S. Serov, V., Shafi, A., G. Sharabian, Y., Shaw, J., Simionatto, S., V. Skabelin, A., S. Smith, E., C. Smith, L., I. Sober, D., Spraker, M., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., E. Stokes, B., Stoler, P., Strauch, S., Taiuti, M., Taylor, S., J. Tedeschi, D., Thompson, R., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., F. Vineyard, M., V. Vlassov, A., Wang, K., B. Weinstein, L., Weller, H., P. Weygand, D., Williams, M., Wolin, E., H. Wood, M., Yegneswaran, A., Yun, J., Zana, L., Zhang, J., Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CLAS, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
13.60.Le, 14.20.Gk, 13.30.Eg, 13.75.Gx, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, High Energy Physics - Experiment
Abstract

Differential cross sections for the reaction $\gamma p \to p \pi^0$ have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged photon beam with energies from 0.675 to 2.875 GeV. The results reported here possess greater accuracy in the absolute normalization than previous measurements. They disagree with recent CB-ELSA measurements for the process at forward scattering angles. Agreement with the SAID and MAID fits is found below 1 GeV. The present set of cross sections has been incorporated into the SAID database, and exploratory fits have been extended to 3 GeV. Resonance couplings have been extracted and compared to previous determinations., Comment: 18 pages, 48 figures

Published
2007

10. Experimental study of exclusive $^2$H$(e,e^\prime p)n$ reaction mechanisms at high $Q^2$

Author

Egiyan, K.S., Asryan, G., Gevorgyan, N., Griffioen, K.A., Laget, J.M., Kuhn, S.E., Adams, G., Amaryan, M.J., Ambrozewicz, P., Anghinolfi, M., Audit, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N.A., Barrow, S., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bektasoglu, M., Bellis, M., Benmouna, N., Berman, B.L., Biselli, A.S., Blaszczyk, L., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Bültmann, S., Burkert, V.D., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carman, D.S., Cazes, A., Chen, Si, Cole, P.L., Collins, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., Crede, V., Cummings, J.P., Dashyan, N., De Masi, R., De Vita, R., De Sanctis, E., Degtyarenko, P.V., Denizli, H., Dennis, L., Deur, A., Dharmawardane, K.V., Dickson, R., Djalali, C., Dodge, G.E., Donnelly, J., Doughty, D., Dugger, M., Dytman, S., Dzyubak, O.P., Egiyan, H., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., Feuerbach, R.J., Fersch, R., Garçon, M., Gavalian, G., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gonenc, A., Gordon, C.I.O., Gothe, R.W., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., Hakobyan, R.S., Hanretty, C., Hardie, J., Hersman, F.W., Hicks, K., Hleiqawi, I., Holtrop, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Ito, M.M., Jenkins, D., Jo, H.S., Joo, K., Juengst, H.G., Kalantarians, N., Kellie, J.D., Khandaker, M., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Kossov, M., Krahn, Z., Kramer, L.H., Kubarovsky, V., Kuhn, J., Kuleshov, S.V., Lachniet, J., Langheinrich, J., Lawrence, D., Li, Ji, Livingston, K., Lu, H.Y., MacCormick, M., Marchand, C., Markov, N., Mattione, P., McAleer, S., Mckinnon, B., McNabb, J.W.C., Mecking, B.A., Mehrabyan, S., Melone, J.J., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Moriya, K., Morrow, S.A., Moteabbed, M., Mueller, J., Munevar, E., Mutchler, G.S., Nadel-Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Osipenko, M., Ostrovidov, A.I., Park, K., Pasyuk, E., Paterson, C., Anefalos Pereira, S., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rosner, G., Rossi, P., Sabatié, F., Salamanca, J., Salgado, C., Santoro, J.P., Sapunenko, V., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Shvedunov, N.V., Skabelin, A.V., Smith, E.S., Smith, L.C., Sober, D.I., Sokhan, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Stoler, P., Strauch, S., Taiuti, M., Tedeschi, D.J., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Watts, D.P., Weinstein, L.B., Weygand, D.P., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., Zhao, Z.W., Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CLAS, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
25.10.+s, 25.30.Fj, Nuclear Theory, FOS: Physical sciences, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The reaction $^2$H$(e,e^\prime p)n$ has been studied with full kinematic coverage for photon virtuality $1.75, Comment: 6 pages, 4 figures

Published
2007

11. Search for the $\Theta^+$ pentaquark in the reactions $\gamma p \to \bar K^0K^+n$ and $\gamma p \to \bar K^0K^0p$

Author

De Vita, R., Battaglieri, M., Kubarovsky, V., Baltzell, N.A., Bellis, M., Goett, J., Guo, L., S. Mutchler, G., Stoler, P., Ungaro, M., P. Weygand, D., J. Amaryan, M., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., P. Ball, J., Batourine, V., Bedlinskiy, I., Benmouna, N., L. Berman, B., S. Biselli, A., Boiarinov, S., Bouchigny, S., Bradford, R., Branford, D., J. Briscoe, W., K. Brooks, W., Bültmann, S., D. Burkert, V., Butuceanu, C., R. Calarco, J., L. Careccia, S., S. Carman, D., Chen, Si, Clinton, E., L. Cole, P., Collins, P., Coltharp, P., Crabb, D., Crannell, H., Crede, V., P. Cummings, J., Dale, D., De Masi, R., De Sanctis, E., V. Degtyarenko, P., Deur, A., V. Dharmawardane, K., Djalali, C., E. Dodge, G., Donnelly, J., Doughty, D., Dugger, M., P. Dzyubak, O., Egiyan, H., S. Egiyan, K., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Funsten, H., Y. Gabrielyan, M., Gan, L., Garçon, M., Gasparian, A., Gavalian, G., P. Gilfoyle, G., L. Giovanetti, K., Girod, F.X., Glamazdin, O., T. Goetz, J., Golovach, E., Gonenc, A., I. O. Gordon, C., W. Gothe, R., A. Griffioen, K., Guidal, M., Guler, N., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, H., S. Hakobyan, R., Hardie, J., W. Hersman, F., Hicks, K., Hleiqawi, I., Holtrop, M., E. Hyde-Wright, C., Ilieva, Y., G. Ireland, D., S. Ishkhanov, B., L. Isupov, E., M. Ito, M., Jenkins, D., Jo, H.S., Joo, K., G. Juengst, H., D. Kellie, J., Khandaker, M., Kim, W., Klein, A., J. Klein, F., V. Klimenko, A., Kossov, M., H. Kramer, L., Kuhn, J., E. Kuhn, S., V. Kuleshov, S., Lachniet, J., Laget, J.M., Langheinrich, J., Lawrence, D., Lee, T., Li, Ji, Livingston, K., Y. Lu, H., MacCormick, M., Markov, N., Mckinnon, B., A. Mecking, B., Melone, J.J., D. Mestayer, M., Meyer, C.A., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mochalov, V., Mokeev, V., Morand, L., Morrow, S.A., Moteabbed, M., Nadel-Turonski, P., Nakagawa, I., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., B. Niczyporuk, B., R. Niroula, M., A. Niyazov, R., Nozar, M., Osipenko, M., I. Ostrovidov, A., Park, K., Pasyuk, E., Paterson, C., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., W. Price, J., Prok, Y., Protopopescu, D., A. Raue, B., Riccardi, G., Ricco, G., Ripani, M., G. Ritchie, B., Ronchetti, F., Rosner, G., Rossi, P., Sabatié, F., Salgado, C., P. Santoro, J., Sapunenko, V., A. Schumacher, R., S. Serov, V., G. Sharabian, Y., V. Shvedunov, N., S. Smith, E., C. Smith, L., I. Sober, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., E. Stokes, B., I. Strakovsky, I., Strauch, S., Taiuti, M., J. Tedeschi, D., Teymurazyan, A., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., F. Vineyard, M., V. Vlassov, A., P. Watts, D., B. Weinstein, L., Williams, M., Wolin, E., H. Wood, M., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., Zhao, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CLAS, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 12.39.Mk, 13.60.-r, 13.60.Rj, 14.20.Jn, High Energy Physics::Experiment, Nuclear Experiment, High Energy Physics - Experiment
Abstract

The exclusive reactions $\gamma p \to \bar K^0 K^+ n$ and $\gamma p \to \bar K^0 K^0 p$ have been studied in the photon energy range 1.6--3.8 GeV, searching for evidence of the exotic baryon $\Theta^+(1540)$ in the decays $\Theta^+\to nK^+$ and $\Theta^+\to p K^0$. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The integrated luminosity was about 70 pb$^{-1}$. The reactions have been isolated by detecting the $K^+$ and proton directly, the neutral kaon via its decay to $K_S \to \pi^+ \pi^-$ and the neutron or neutral kaon via the missing mass technique. The mass and width of known hyperons such as $\Sigma^+$, $\Sigma^-$ and $\Lambda(1116)$ were used as a check of the mass determination accuracy and experimental resolution. Approximately 100,000 $\Lambda^*(1520)$'s and 150,000 $\phi$'s were observed in the $\bar K^0 K^+ n$ and $\bar K^0 K^0 p$ final state respectively. No evidence for the $\Theta^+$ pentaquark was found in the $nK^+$ or $pK_S$ invariant mass spectra. Upper limits were set on the production cross section of the reaction $\gamma p \to \Theta^+ \bar K^0$ as functions of center-of-mass angle, $nK^+$ and $pK_S$ masses. Combining the results of the two reactions, the 95% C.L. upper limit on the total cross section for a resonance peaked at 1540 MeV was found to be 0.7 nb. Within most of the available theoretical models, this corresponds to an upper limit on the $\Theta^+$ width, $\Gamma_{\Theta^{+}}$, ranging between 0.01 and 7 MeV., Comment: 1 tex file (16 pages) + 23 figures (25 eps files)

Published
2006

12. Search for $\Theta^{++}$ Pentaquarks in the Exclusive Reaction $\gamma p\to K^+K^-p$

Author

Kubarovsky, V., Battaglieri, M., de Vita, R., Goett, J., Guo, L., Mutchler, G.S., Stoler, P., Weygand, D.P., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J.P., Baltzell, N.A., Batourine, V., Bedlinskiy, I., Bellis, M., Benmouna, N., Berman, B.L., Biselli, A.S., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Bültmann, S., Burkert, V.D., Butuceanu, C., Calarco, J.R., Careccia, S.L., Carman, D.S., Chen, Si, Clinton, E., Cole, P.L., Collins, P., Coltharp, P., Crabb, D., Crannell, H., Crede, V., Cummings, J.P., de Masi, R., Dale, D., de Sanctis, E., Degtyarenko, P.V., Deur, A., Dharmawardane, K.V., Djalali, C., Dodge, G.E., Donnelly, J., Doughty, D., Dugger, M., Dzyubak, O.P., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Eugenio, P., Fedotov, G., Funsten, H., Gabrielyan, M.Y., Gan, L., Garçon, M., Gasparian, A., Gavalian, G., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Glamazdin, O., Goetz, J.T., Golovach, E., Gonenc, A., Gordon, C.I.O., Gothe, R.W., Griffioen, K.A., Guidal, M., Guler, N., Gyurjyan, V., Hadjidakis, C., Hafidi, K., Hakobyan, R.S., Hardie, J., Hersman, F.W., Hicks, K., Hleiqawi, I., Holtrop, M., Hyde-Wright, C.E., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Ito, M.M., Jenkins, D., Jo, H.S., Joo, K., Juengst, H.G., Kellie, J.D., Khandaker, M., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Kossov, M., Kramer, L.H., Kuhn, J., Kuhn, S.E., Kuleshov, S.V., Lachniet, J., Laget, J.M., Langheinrich, J., Lawrence, D., Lee, T., Li, Ji, Livingston, K., Lu, H., Maccormick, M., Markov, N., Mckinnon, B., Mecking, B.A., Melone, J.J., Mestayer, M.D., Meyer, C.A., Mibe, T., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mochalov, V., Mokeev, V., Morand, L., Morrow, S.A., Moteabbed, M., Nadel-Turonski, P., Nakagawa, I., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niroula, M.R., Niyazov, R.A., Nozar, M., Osipenko, M., Ostrovidov, A.I., Park, K., Pasyuk, E., Paterson, C., Pierce, J., Pivnyuk, N., Pocanic, D., Pogorelko, O., Pozdniakov, S., Price, J.W., Prok, Y., Protopopescu, D., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rosner, G., Rossi, P., Sabatié, F., Salgado, C., Santoro, J.P., Sapunenko, V., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Shvedunov, N.V., Smith, E.S., Smith, L.C., Sober, D.I., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., Stokes, B.E., Strakovsky, I.I., Strauch, S., Taiuti, M., Tedeschi, D.J., Teymurazyan, A., Thoma, U., Tkabladze, A., Tkachenko, S., Todor, L., Tur, C., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Weinstein, L.B., Williams, M., Wolin, E., Wood, M.H., Yegneswaran, A., Zana, L., Zhang, J., Zhao, B., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CLAS, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
13.60.Rj, 13.40.-f, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, High Energy Physics - Experiment
Abstract

The reaction $\gamma p \to pK^+K^-$ was studied at Jefferson Lab with photon energies from 1.8 to 3.8 GeV using a tagged photon beam. The goal was to search for a $\Theta^{++}$ pentaquark, a narrow doubly charged baryon state having strangeness S=+1 and isospin I=1, in the $pK^+$ invariant mass spectrum. No statistically significant evidence of a $\Theta^{++}$ was found. Upper limits on the total and differential production cross section for the reaction $\gamma p \to K^-\Theta^{++}$ were obtained in the mass range from 1.5 to 2.0 GeV/c$^2$, with an upper limit of about 0.15 nb, 95% C.L. for a narrow resonance with a mass $M_{\Theta^{++}}=1.54$ GeV/c$^2$. This result places a very stringent upper limit on the $\Theta^{++}$ width., Comment: 6 pages, 4 figures

Published
2006

13. Measurement of the N $\rightarrow \Delta^+$(1232) Transition at High Momentum Transfer by $\pi^0$ Electroproduction

Author

Ungaro, M., Stoler, P., Aznauryan, I., Burkert, V. D., Joo, K., Smith, L. C., Adams, G., Amarian, M., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Audit, G., Avakian, H., Bagdasaryan, H., P. Ball, J., Baltzell, N.A., Barrow, S., Batourine, V., Battaglieri, M., Bedliski, I., Bektasoglu, M., Bellis, M., Benmouna, N., L. Berman, B., S. Biselli, A., E. Bonner, B., Bouchigny, S., Boiarinov, S., Bradford, R., Branford, D., J. Briscoe, W., K. Brooks, W., Bültmann, S., Butuceanu, C., R. Calarco, J., L. Careccia, S., S. Carman, D., Cazes, A., Chen, Si, L. Cole, P., Coltharp, P., Cords, D., Corvisiero, P., Crabb, D., P. Cummings, J., De Sanctis, E., Devita, R., V. Degtyarenko, P., Denizli, H., Dennis, L., Deur, A., V. Dharmawardane, K., Djalali, C., E. Dodge, G., Donnelly, J., Doughty, D., Dugger, M., Dytman, S., P. Dzyubak, O., Egiyan, H., S. Egiyan, K., Elouadrhiri, L., Eugenio, P., Fatemi, R., Fedotov, G., Feldman, G., J. Feuerbach, R., Funsten, H., Garçon, M., Gavalian, G., P. Gilfoyle, G., L. Giovanetti, K., X. Girod, F., Goetz, J., I. O. Gordon, C., W. Gothe, R., A. Griffioen, K., Guidal, M., Guillo, M., Guler, N., Guo, L., Gyurjyan, V., Hadjidakis, C., S. Hakobyan, R., Hardie, J., Heddle, D., W. Hersman, F., Hleiqawi, I., Holtrop, M., Hicks, K., E. Hyde-Wright, C., Ilieva, Y., G. Ireland, D., S. Ishkhanov, B., M. Ito, M., Jenkins, D., Jo, H.S., G. Juengst, H., D. Kellie, J., Khandaker, M., Kim, W., Klein, A., J. Klein, F., V. Klimenko, A., Kossov, M., H. Kramer, L., Kubarovsky, V., Kuhn, J., E. Kuhn, S., Lachniet, J., M. Laget, J., Langheinrich, J., Lawrence, D., Lee, T., Li, Ji, Livingston, K., Marchand, C., Markov, N., McAleer, S., Mckinnon, B., W. C. Mcnabb, J., A. Mecking, B., Mehrabyan, S., Melone, J.J., D. Mestayer, M., Meyer, C.A., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Mokeev, V., Morand, L., Morrow, S.A., Mueller, J., S. Mutchler, G., Napolitano, J., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., B. Niczyporuk, B., Niroula, M., A. Niyazov, R., Nozar, M., V. O'Rielly, G., Osipenko, M., I. Ostrovidov, A., Park, K., Pasyuk, E., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., M. Preedom, B., W. Price, J., Prok, Y., Protopopescu, D., M. Qin, L., A. Raue, B., Riccardi, G., Ricco, G., Ripani, M., G. Ritchie, B., Ronchetti, F., Rosner, G., Rossi, P., D. Rubin, P., Sabatié, F., Salgado, C., P. Santoro, J., Sapunenko, V., A. Schumacher, R., S. Serov, V., G. Sharabian, Y., V. Skabelin, A., S. Smith, E., I. Sober, D., Stavinsky, A., Stepanyan, S.S., Stepanyan, S., E. Stokes, B., I. Strakovsky, I., Strauch, S., Taiuti, M., J. Tedeschi, D., Thoma, U., Tkabladze, A., Todor, L., Tkachenko, S., Tur, C., F. Vineyard, M., V. Vlassov, A., B. Weinstein, L., P. Weygand, D., Williams, M., Wolin, E., H. Wood, M., Yegneswaran, A., Zana, L., Zhang, B., Zhang, J., Zhao, B., Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CLAS, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], FOS: Physical sciences, 13.60.Le, 13.40.Gp, 14.20.Gk, High Energy Physics - Experiment
Abstract

PHASE; We report a new measurement of the exclusive electroproduction reaction gamma* p -> pi0 p to explore the evolution from soft non-perturbative physics to hard processes via the Q2 dependence of the magnetic (M1+), electric (E1+) and scalar (S1+) multipoles in the N to Delta transition. 9000 differential cross section data points cover W from threshold to 1.4 eV/c2, 4pi center-of-mass solid angle, and Q2 from 3 to 6 GeV2/c2, the highest yet achieved. It is found that the magnetic form factor G*M decreases with Q2 more steeply than the proton magnetic form factor, the ratio E1+/M1+ is small and negative, indicating strong helicity non-conservation, and the ratio S1+/M1+ is negative, while its magnitude increases with Q2.

Published
2006

14. Deeply virtual and exclusive electroproduction of $\omega$-mesons

Author

Morand, L, Dore, D, Garcon, M, Guidal, M, Laget, Jm, Morrow, S, Sabatie, F, Smith, E, Adams, G, Arnbrozewicz, P, Anghinolfi, Marco, Asryan, G, Audit, G, Avakian, H, Bagdasaryan, H, Ball, J, Ball, Jp, Baltzell, Na, Barrow, S, Batourine, V, Battaglieri, Marco, Bektasoglu, M, Bellis, M, Benmouna, N, Berman, Bl, Biselli, As, Boiarinov, S, Bonner, Be, Bouchigny, S, Bradford, R, Branford, D, Briscoe, Wj, Brooks, Wk, Bultmann, S, Burkert, Vd, Butuceanu, C, Calarco, Jr, Careccia, Sl, Carman, Ds, Cazes Antoine Jacques, Chen, S, Cole, Pl, Cords, D, Corvisiero, Pietro, Crabb, D, Cummings, Jp, De Sanctis Enzo, Devita, R, Degtyarenko, Pv, Denizli, H, Dennis, L, Deur, A, Dharmawardane, Kv, Dhuga, Ks, Djalali, C, Dodge, Ge, Donnelly, J, Doughty, D, Dugger, M, Dytman, S, Dzyubak, Op, Egiyan, H, Egiyan, Ks, Elouadrhiri, L, Eugenio, P, Fatemi, R, Feldman, Gerald, Fersch, Rg, Feuerbach, Rj, Funsten, H, Gavalian, G, Gilfoyle, Gp, Giovanetti, Kl, Girod, Fx, Goetz, Jt, Gordon, Cio, Gothe, Rw, Griffioen, Ka, Guillo, M, Guler, N, Guo, L, Gyurjyan, V, Hadjidakis, Cynthia, Hakobyan, Rs, Hardie, J, Heddle, D, Hersman, Fw, Hicks, K, Hleiqawi, I, Holtrop, M, Hyde Wright CE, Ilieva, Y, Ireland, Dg, Ito, Mm, Jenkins, D, Jo, Hs, Joo, K, Juengst, Hg, Kellie, Jd, Khandaker, M, Kim, W, Klein, A, Klein, Fj, Klimenko, Av, Kossov, M, Kubarovski, V, Kramer, Lh, Kuhn, Se, Kuhn, J, Lachniet, J, Langhenirich, J, Lawrence, D, Lee, T, Jun, Li, Livingston, K, Marchand, C, Maximon, Lc, Mcaleer, S, Mckinnon, B, Mcnabb, Jwc, Mecking, Ba, Mehrabyan, S, Melone, Jj, Mestayer, Md, Meyer, Ca, Mikhailov, K, Minehart, R, Mirazita, Marco, Miskimen, R, Mokeev, V, Mueller, J, Mutchler, Gs, Napolitano, J, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, Bb, Niyazov, Ra, Nozar, M, O'Rielly, Gv, Osipenko, Mikhail, Ostrovidov, Ai, Park, K, Pasyuk, E, Philips, Sa, Pivnyuk, N, Pocanic, D, Pogorelko, O, Polli, Ermanno, Popa, I, Pozdniakov, S, Preedom, Bm, Price, Jw, Prok, Y, Protopopescu, D, Raue, Ba, Riccardi, G, Ricco, Giovanni, Ripani, Marco, Ritchie, Bg, Ronchetti, Federico, Rosner, G, Rossi, Patrizia, Rubin, Pd, Salgado Lopez Carlos Alberto, Santoro, Joseph, Sapunenko, Vladimir, Schumacher, Ra, Serov, Vs, Sharabian, Yg, Shaw, J, Skabelin, Av, Smith, Lc, Sober, Di, Stavinsky, A, Stepanyan, S, Stepanyan, Ss, Stokes, Be, Stoler, P, Strakovsky, Ii, Strauch, S, Taiuti, MAURO GINO, Tedeschi, Dj, Thoma, U, Tkabladze, A, Todor, L, Tur, C, Ungaro, M, Vineyard, Mf, Vlassov, Av, Weinstein, Lb, Weygand, Dp, Williams Meurig Crispin Stowe, Wolin, E, Wood, Mh, Yegneswaran, A, Zana, L., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
Nuclear and High Energy Physics, Particle physics, Photon, Meson, Proton, Nuclear Theory, FOS: Physical sciences, Parton, 13.60.Le - 12.40.Nn -12.38.Bx, 01 natural sciences, Omega, Resonance (particle physics), High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), GENERALIZED PARTON DISTRIBUTIONS, CLAS, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], SCATTERING, 010306 general physics, Nuclear Experiment, Coupling, Physics, 010308 nuclear & particles physics, HYDROGEN, PHOTON, SPIN, GENERALIZED PARTON DISTRIBUTIONS, VECTOR-MESONS, SCATTERING, PHOTON, HYDROGEN, SPIN, CLAS, High Energy Physics::Experiment, Nucleon, VECTOR-MESONS
Abstract

The exclusive omega electroproduction off the proton was studied in a large kinematical domain above the nucleon resonance region and for the highest possible photon virtuality (Q2) with the 5.75 GeV beam at CEBAF and the CLAS spectrometer. Cross sections were measured up to large values of the four-momentum transfer (-t < 2.7 GeV2) to the proton. The contributions of the interference terms sigma_TT and sigma_TL to the cross sections, as well as an analysis of the omega spin density matrix, indicate that helicity is not conserved in this process. The t-channel pi0 exchange, or more generally the exchange of the associated Regge trajectory, seems to dominate the reaction gamma* p -> omega p, even for Q2 as large as 5 GeV2. Contributions of handbag diagrams, related to Generalized Parton Distributions in the nucleon, are therefore difficult to extract for this process. Remarkably, the high-t behaviour of the cross sections is nearly Q2-independent, which may be interpreted as a coupling of the photon to a point-like object in this kinematical limit., 15 pages,19 figures

Published
2005

15. Measurement of the Polarized Structure Function $\sigma_{LT^\prime}$ for Pion Electroproduction in the Roper Resonance Region

Author

Joo, K, Smith, Lc, Aznauryan, Ig, Burkert, Vd, Egiyan, H, Minehart, R, Adams, G, Ambrozewicz, P, Anciant, E, Anghinolfi, Marco, Asavapibhop, B, Asryan, G, Audit, G, Auger, T, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, Jp, Baltzell, Na, Barrow, S, Batourine, V, Battaglieri, Marco, Beard, K, Bedlinskiy, I, Bektasoglu, M, Bellis, M, Benmouna, N, Berman, Bl, Bianchi, Nicola, Biselli, As, Bonner, Be, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, Wj, Brooks, Wk, Bueltmann, S, Butuceanu, C, Calarco, Jr, Careccia, Sl, Carman, Ds, Carnahan, B, Cetina, C, Chen, S, Cole, Pl, Coleman, A, Coltharp, P, Cords, D, Corvisiero, Pietro, Crabb, D, Cummings, Jp, De Sanctis Enzo, Devita, R, Degtyarenko, Pv, Dennis, L, Deur, A, Dharmawardane, Kv, Dhuga, Ks, Djalali, C, Dodge, Ge, Donnelly, J, Doughty, D, Dragovitsch, P, Dugger, M, Dytman, S, Dzyubak, Op, Egiyan, Ks, Elouadrhiri, L, Empl, A, Eugenio, P, Farhi, L, Fatemi, R, Fedotov, G, Feldman, Gerald, Feuerbach, Rj, Forest, Ta, Frolov, V, Funsten, H, Gaff, Sj, Garcon, M, Gavalian, G, Gilfoyle, Gp, Giovanetti, Kl, Girard, P, Girod, Fx, Goetz, Jt, Gothe, Rw, Griffioen, Ka, Guidal, M, Guillo, M, Guler, N, Guo, L, Gyurjyan, V, Hakobyan, Rs, Hardie, J, Heddle, D, Hersman, Fw, Hicks, K, Hleiqawi, I, Holtrop, M, Hu, J, Hyde Wright CE, Ilieva, Y, Ireland, Dg, Ishkhanov, Bs, Ito, Mm, Jenkins, D, Jo, Hs, Juengst, Hg, Kelley, Jh, Kellie, Jd, Khandaker, M, Kim, Ky, Kim, K, Kim, W, Klein, A, Klein, Fj, Klimenko, Av, Klusman, M, Kossov, M, Kramer, Lh, Kubarovsky, V, Kuhn, J, Kuhn, Se, Lachniet, J, Laget, Jm, Langheinrich, J, Lawrence, D, Lee, T, Livingston, K, Lukashin, K, Manak, Jj, Marchand, C, Maximon, Lc, Mcaleer, S, Mckinnon, B, Mcnabb, Jwc, Mecking, Ba, Mestayer, Md, Meyer, Ca, Mikhailov, K, Mirazita, Marco, Miskimen, R, Mokeev, V, Morrow, Sa, Muccifora, Valeria, Mueller, J, Mutchler, Gs, Nadel Turonski, P, Napolitano, J, Nasseripour, R, Nelson, So, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, Bb, Niyazov, Ra, Nozar, M, O'Rielly, Gv, Osipenko, Mikhail, Ostrovidov, Ai, Park, K, Pasyuk, E, Peterson, G, Philips, Sa, Pierce, J, Pivnyuk, N, Pocanic, D, Pogorelko, O, Polli, Ermanno, Pozdniakov, S, Preedom, Bm, Price, Jw, Prok, Y, Protopopescu, D, Qin, Lm, Raue, Ba, Riccardi, G, Ricco, Giovanni, Ripani, Marco, Ritchie, Bg, Ronchetti, Federico, Rosner, G, Rossi, Patrizia, Rowntree, D, Rubin, Pd, Sabatie, F, Sabourov, K, Salgado Lopez Carlos Alberto, Santoro, Joseph, Sapunenko, Vladimir, Schumacher, Ra, Serov, Vs, Shafi, A, Sharabian, Yg, Shaw, J, Simionatto, S, Skabelin, Av, Smith, Es, Sober, Di, Spraker, M, Stavinsky, A, Stepanyan, Ss, Stepanyan, S, Stokes, Be, Stoler, P, Strakovsky, Ii, Strauch, S, Taiuti, MAURO GINO, Taylor, S, Tedeschi, Dj, Thoma, U, Thompson, R, Tkabladze, A, Tur, C, Ungaro, M, Vineyard, Mf, Vlassov, Av, Wang, K, Weinstein, Lb, Weller, H, Weygand, Dp, Williams Meurig Crispin Stowe, Wolin, E, Wood, Mh, Yegneswaran, A, Yun, J, Zana, L, Zhang, J., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
BARYONS, MODEL, BARYONS, MODEL, High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

The polarized longitudinal-transverse structure function $\sigma_{LT^\prime}$ measures the interference between real and imaginary amplitudes in pion electroproduction and can be used to probe the coupling between resonant and non-resonant processes. We report new measurements of $\sigma_{LT^\prime}$ in the $N(1440){1/2}^+$ (Roper) resonance region at $Q^2=0.40$ and 0.65 GeV$^2$ for both the $\pi^0 p$ and $\pi^+ n$ channels. The experiment was performed at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS) using longitudinally polarized electrons at a beam energy of 1.515 GeV. Complete angular distributions were obtained and are compared to recent phenomenological models. The $\sigma_{LT^\prime}(\pi^+ n)$ channel shows a large sensitivity to the Roper resonance multipoles $M_{1-}$ and $S_{1-}$ and provides new constraints on models of resonance formation., Comment: 5 pages, 3 figures. Revised manuscript accepted by Physical Review C (Brief Report)

Published
2005

16. Two nucleon momentum distributions measured in $^3$He $(e,e'pp)n$

Author

Niyazov, R.A., Weinstein, L.B., Carman, D.S., Joo, K., Mestayer, M.D., Raue, B.A., De Vita, R., Anghinolfi, M., Burkert, V.D., Dodge, G.E., Minehart, R., Taiuti, M., Weller, H., Adams, G., Amaryan, M.J., Anciant, E., Armstrong, D.S., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J.P., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bianchi, N., Biselli, A.S., Boiarinov, S., Bonner, B.E., Bosted, P., Bouchigny, S., Branford, D., Brooks, W.K., Bueltmann, S., Calarco, J.R., Capitani, G.P., Carnahan, B., Cazes, A., Ciciani, L., Cole, P.L., Coleman, A., Connelly, J., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., De-Sanctis, E., Degtyarenko, P.V., Demirchyan, R., Denizli, H., Dennis, L., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Farhi, L., Fatemi, R., Feuerbach, R.J., Ficenec, J., Forest, T.A., Frolov, V., Funsten, H., Gaff, S.J., Gai, M., Garcon, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K.L., Girard, Pascal, Golovatch, E., Griffioen, K., Guidal, M., Guillo, M., Gyurjyan, V., Hadjidakis, C., Hancock, D., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ishkanov, B.S., Ito, M.M., Jenkins, D., Kelley, J.H., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kuhn, S.E., Lachniet, J., Laget, J.M., Lawrence, D., Li, J., Livingston, K., Longhi, A., Loukachine, K., Lucas, M., Major, W., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Meyer, C.A., Mikhailov, K.., Mirazita, M., Miskimen, R., Mokeev, V., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S.O., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Opper, A.K., O'Rielly, G.V., Osipenko, M., Park, K., Pasyuk, E., Peterson, G., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Reolon, A.R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rock, S., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C., Sapunenko, V., Sargsyan, M., Schumacher, R.A., Serov, V.S., Shafi, A., Sharabian, Y.G., Shaw, J., Skabelin, A.V., Smith, E.S., Smith, T., Smith, L.C., Sober, D.I., Sorrell, L., Spraker, M., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Taylor, S., Tedeschi, D.J., Thompson, R., Todor, L., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weisberg, A., Weygand, D.P., Whisnant, C.S., Wolin, E., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., Zhou, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2004

17. Tensor polarization of the $\phi$ meson photoproduced at high $t$

Author

McCormick, K., Audit, G., Laget, J.M., Guo, L., Weygand, D.P., Niyazov, R.A., Weinstein, L.B., Carman, D.S., Joo, K., Mestayer, M.D., Raue, B.A., De Vita, R., Anghinolfi, M., Burkert, V.D., Dodge, G.E., Minehart, R., Taiuti, M., Weller, H., Adams, G., Amaryan, M.J., Anciant, E., Armstrong, D.S., Asavapibhop, B., Asryan, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J.P., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bianchi, N., Biselli, A.S., Boiarinov, S., Bonner, B.E., Bosted, P., Bouchigny, S., Branford, D., Brooks, W.K., Bueltmann, S., Calarco, J.R., Capitani, G.P., Carnahan, B., Cazes, A., Ciciani, L., Cole, P.L., Coleman, A., Connelly, J., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., De-Sanctis, E., Degtyarenko, P.V., Demirchyan, R., Denizli, H., Dennis, L., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Farhi, L., Fatemi, R., Feuerbach, R.J., Ficenec, J., Forest, T.A., Frolov, V., Funsten, H., Gaff, S.J., Gai, M., Garcon, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K.L., Girard, Pascal, Golovatch, E., Griffioen, K., Guidal, M., Guillo, M., Gyurjyan, V., Hadjidakis, C., Hancock, D., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ishkanov, B.S., Ito, M.M., Jenkins, D., Kelley, J.H., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kuhn, S.E., Lachniet, J., Lawrence, D., Li, J., Livingston, K., Longhi, A., Loukachine, K., Lucas, M., Major, W., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Meyer, C.A., Mikhailov, K.., Mirazita, M., Miskimen, R., Mokeev, V., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S.O., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Opper, A.K., O'Rielly, G.V., Osipenko, M., Park, K., Pasyuk, E., Peterson, G., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Reolon, A.R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rock, S., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C., Sapunenko, V., Sargsyan, M., Schumacher, R.A., Serov, V.S., Shafi, A., Sharabian, Y.G., Shaw, J., Skabelin, A.V., Smith, E.S., Smith, T., Smith, L.C., Sober, D.I., Sorrell, L., Spraker, M., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Taylor, S., Tedeschi, D.J., Thompson, R., Todor, L., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weisberg, A., Whisnant, C.S., Wolin, E., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., Zhou, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
EXCHANGE-POTENTIAL APPROACH, FOS: Physical sciences, High Energy Physics - Experiment, NUCLEON-SCATTERING, High Energy Physics - Experiment (hep-ex), EXCHANGE-POTENTIAL APPROACH, BARYON-BARYON SCATTERING, LARGE MOMENTUM-TRANSFER, VECTOR-MESONS, NUCLEON-SCATTERING, CLAS, SYSTEM, LARGE MOMENTUM-TRANSFER, CLAS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment, BARYON-BARYON SCATTERING, VECTOR-MESONS, SYSTEM
Abstract

As part of a measurement of the cross section of $\phi$ meson photoproduction to high momentum transfer, we measured the polar angular decay distribution of the outgoing $K^+$ in the channel $\phi \to K^+K^-$ in the $\phi$ center-of-mass frame (the helicity frame). We find that s-channel helicity conservation (SCHC) holds in the kinematical range where $t$-channel exchange dominates (up to $-t \sim 2.5$ GeV$^2$ for $E_{\gamma}$=3.6 GeV). Above this momentum, $u$-channel production of a $\phi$ meson dominates and induces a violation of SCHC. The deduced value of the $\phi NN$ coupling constant lies in the upper range of previously reported values., Comment: 6 pages; 5 figures

Published
2004

18. First measurement of transferred polarization in the exclusive $\vec e p \rightarrow e'K^+\vec \Lambda$ reaction

Author

Carman, D.S., Joo, K., Mestayer, M.D., Raue, B.A., De Vita, R., Anghinolfi, M., Burkert, V.D., Dodge, G.E., Minehart, R., Taiuti, M., Weller, H., Adams, G., Amaryan, M.J., Anciant, E., Armstrong, D.S., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J.P., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bianchi, N., Biselli, A.S., Boiarinov, S., Bonner, B.E., Bosted, P., Bouchigny, S., Branford, D., Brooks, W.K., Bueltmann, S., Calarco, J.R., Capitani, G.P., Carnahan, B., Cazes, A., Ciciani, L., Cole, P.L., Coleman, A., Connelly, J., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., De-Sanctis, E., Degtyarenko, P.V., Demirchyan, R., Denizli, H., Dennis, L., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Farhi, L., Fatemi, R., Feuerbach, R.J., Ficenec, J., Forest, T.A., Frolov, V., Funsten, H., Gaff, S.J., Gai, M., Garcon, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K.L., Girard, Pascal, Golovatch, E., Griffioen, K., Guidal, M., Guillo, M., Gyurjyan, V., Hadjidakis, C., Hancock, D., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ishkanov, B.S., Ito, M.M., Jenkins, D., Kelley, J.H., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kuhn, S.E., Lachniet, J., Laget, J.M., Lawrence, D., Li, J., Livingston, K., Longhi, A., Loukachine, K., Lucas, M., Major, W., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Meyer, C.A., Mikhailov, K.., Mirazita, M., Miskimen, R., Mokeev, V., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S.O., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niyazov, R.A., Opper, A.K., O'Rielly, G.V., Osipenko, M., Park, K., Pasyuk, E., Peterson, G., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Reolon, A.R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rock, S., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C., Sapunenko, V., Sargsyan, M., Schumacher, R.A., Serov, V.S., Shafi, A., Sharabian, Y.G., Shaw, J., Skabelin, A.V., Smith, E.S., Smith, T., Smith, L.C., Sober, D.I., Sorrell, L., Spraker, M., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Taylor, S., Tedeschi, D.J., Thompson, R., Todor, L., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weinstein, L.B., Weisberg, A., Weygand, D.P., Whisnant, C.S., Wolin, E., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., Zhou, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2003

19. Measurement of the proton spin structure function $g_1(x,Q^2)$ for $Q2$ from 0.15 to 1.6 GeV$^2$ with CLAS

Author

Fatemi, R., Skabelin, A. V., Burkert, V. D., Crabb, D., Vita, R., Kuhn, S. E., Minehart, R., Adams, G., Anciant, E., Anghinolfi, M., Asavapibhop, B., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J. P., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bellis, M., Bertozzi, W., Bianchi, N., Biselli, A. S., Boiarinov, S., Bonner, B. E., Bosted, P. E., Bouchigny, S., Bradford, R., Branford, D., Brooks, W. K., Butuceanu, C., Calarco, J. R., Carman, D. S., Carnahan, B., Cetina, C., Ciciani, L., Clark, R., Cole, P. L., Coleman, A., Connelly, J., Cords, D., Corvisiero, P., Crannell, H., Cummings, J. P., Sanctis, E., Degtyarenko, P. V., Denizli, H., Dennis, L., Dharmawardane, K. V., Dhuga, K. S., Djalali, C., Dodge, G. E., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., Egiyan, H., Egiyan, K. S., Elouadrhiri, L., Empl, A., Eugenio, P., Farhi, L., Feuerbach, R. J., Freyberger, A., Ficenec, J., Forest, T. A., Frolov, V., Funsten, H., Gaff, S. J., Garçon, M., Gavalian, G., Gilad, S., Gilfoyle, G. P., Giovanetti, K. L., Girard, P., Gordon, C. I. O., Griffioen, K. A., Guidal, M., Guillo, M., Guo, L., Gyurjyan, V., Hadjidakis, C., Hancock, D., Hardie, J., Heddle, D., Heimberg, P., Hersman, F. W., Hicks, K., Hicks, R. S., Holtrop, M., Hu, J., Hyde-Wright, C. E., Ilieva, Y., Ito, M. M., Jenkins, D., Joo, K., Keith, C., Kelley, J. H., Kellie, J. D., Khandaker, M., Kim, K. Y., Kim, K., Kim, W., Klein, A., Klein, F. J., Klimenko, A. V., Klusman, M., Kossov, M., Koubarovski, V., Kramer, L. H., Kuang, Y., Kuhn, J., Lachniet, J., Laget, J. M., Lawrence, D., Li, J., Livingston, K., Longhi, A., Lukashin, K., Major, W., Manak, J. J., Marchand, C., Mcaleer, S., Mcnabb, J. W. C., Mecking, B. A., Mehrabyan, S., Mestayer, M. D., Meyer, C. A., Mikhail Osipenko, Mirazita, M., Miskimen, R., Morand, L., Morrow, S. A., Muccifora, V., Mueller, J., Mutchler, G. S., Napolitano, J., Nasseripour, R., Nelson, S. O., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B. B., Niyazov, R. A., Nozar, M., O Brien, J. T., O Rielly, G. V., Osipenko, M., Park, K., Pasyuk, E., Peterson, G., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B. M., Price, J. W., Prok, Y., Protopopescu, D., Qin, L. M., Raue, B. A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B. G., Rock, S. E., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P. D., Sabatié, F., Sabourov, K., Salgado, C., Santoro, J. P., Sapunenko, V., Sargsyan, M., Schumacher, R. A., Seely, M., Serov, V. S., Sharabian, Y. G., Shaw, J., Simionatto, S., Smith, E. S., Smith, T., Smith, L. C., Sober, D. I., Sorrel, L., Spraker, M., Stavinsky, A., Stepanyan, S., Stoler, P., Strauch, S., Taiuti, M., Taylor, S., Tedeschi, D. J., Thoma, U., Thompson, R., Todor, L., Tur, C., Ungaro, M., Vineyard, M. F., Vlassov, A. V., Wang, K., Weinstein, L. B., Weller, H., Weygand, D. P., Whisnant, C. S., Wolin, E., Wood, M. H., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., Zhou, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and CLAS

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Abstract

Double-polarization asymmetries for inclusive ep scattering were measured at Jefferson Lab using 2.6 and 4.3 GeV longitudinally polarized electrons incident on a longitudinally polarized NH3 target in the CLAS detector. The polarized structure function g(1)(x,Q2) was extracted throughout the nucleon resonance region and into the deep inelastic regime, for Q(2)=0.15-1.64 GeV2. The contributions to the first moment Gamma(1)(Q2)= integral g(1)(x,Q2) dx were determined up to Q(2)=1.2 GeV2. Using a parametrization for g(1) in the unmeasured low x regions, the complete first moment was estimated over this Q2 region. A rapid change in Gamma(1) is observed for Q21 GeV2, with a sign change near Q(2)=0.3 GeV2, indicating dominant contributions from the resonance region. At Q(2)=1.2 GeV2 our data are below the perturbative QCD evolved scaling value.

Published
2003

20. Observation of nuclear scaling in the A(e,e') reaction at $\chi_B>1$

Author

Egiyan, K.Sh., Dashyan, N., Sargsian, M., Stepanyan, S., Weinstein, L.B., Mestayer, M.D., Minehart, R., Taiuti, M., Weller, H., Adams, G., Amaryan, M.J., Ambrozewicz, P., Anciant, E., Anghinolfi, M., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J.P., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bianchi, N., Biselli, A.S., Boiarinov, S., Bonner, B.E., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Butuceanu, C., Calarco, J.R., Carman, D.S., Carnahan, B., Cetina, C., Ciciani, L., Cole, P.L., Coleman, A., Cords, D., Connelly, J., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., De-Sanctis, E., Degtyarenko, P.V., Demirchyan, R., Denizli, H., Dennis, L., De Vita, R., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Dodge, G.E., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Dzyubak, O.P., Eckhause, M., Egiyan, H., Elouadrhiri, L., Empl, A., Eugenio, P., Fatemi, R., Feuerbach, R.J., Ficenec, J., Forest, T.A., Funsten, H., Gai, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K.L., Girard, Pascal, Gordon, C.I.O., Griffioen, K., Guidal, M., Guillo, M., Guo, L., Gyurjyan, V., Hadjidakis, C., Hakobyan, R.S., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ilieva, Y., Ito, M.M., Jenkins, D., Joo, K., Kelley, J.H., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klimenko, A., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kuhn, S.E., Lachniet, J., Laget, J.M., Lawrence, D., Li, J., Lukashin, K., Manak, J.J., Marchand, C., Maximon, L.C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Meyer, C.A., Mikhailov, K.., Mirazita, M., Miskimen, R., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S.O., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niyazov, R.A., Opper, A.K., O'Rielly, G.V., Osipenko, M., Park, K., Pasyuk, E., Peterson, G., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C., Sapunenko, V., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Shaw, J., Skabelin, A.V., Smith, E.S., Smith, T., Smith, L.C., Sober, D.I., Spraker, M., Stavinsky, A., Stoler, P., Strakovsky, I.I., Taylor, S., Tedeschi, D.J., Thompson, R., Todor, L., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weisberg, A., Weygand, D.P., Whisnant, C.S., Wolin, E., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., Zhou, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2003

21. Measurement of ep$\rightarrow$e'p$\pi^+\pi^-$and baryon resonance analysis

Author

Ripani, M., Burkert, V.D., Mokeev, V., Battaglieri, M., De Vita, R., Golovach, E., Carman, D.S., Joo, K., Mestayer, M.D., Raue, B.A., Anghinolfi, M., Minehart, R., Taiuti, M., Weller, H., Adams, G., Anciant, E., Asavapibhop, B., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J.P., Barrow, S., Beard, K., Bektasoglu, M., Bellis, M., Berman, B.L., Bianchi, N., Biselli, A.S., Boiarinov, S., Bonner, B.E., Bouchigny, S., Bradford, R., Branford, D., Briscoe, W.J., Brooks, W.K., Calarco, J.R., Capitani, G.P., Carnahan, B., Cazes, A., Cetina, C., Ciciani, L., Cole, P.L., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., De-Sanctis, E., Degtyarenko, P.V., Denizli, H., Dennis, L., Dharmawardane, K.V., Djalali, C., Dodge, G.E., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Fatemi, R., Feldman, G., Feuerbach, R.J., Ficenec, J., Forest, T.A., Funsten, H., Gaff, S.J., Gai, M., Garcon, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K.L., Girard, Pascal, Griffioen, K., Guidal, M., Guillo, M., Guo, L., Gyurjyan, V., Hadjidakis, C., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ishkanov, B.S., Ito, M.M., Jenkins, D., Kelley, J.H., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kuhn, S.E., Lachniet, J., Laget, J.M., Lawrence, D., Li, J., Livingston, K., Longhi, A., Lukashin, K., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Meyer, C.A., Mikhailov, K.., Mirazita, M., Miskimen, R., Morand, L., Morrow, S.A., Mozer, M.U., Muccifora, V., Mueller, J., Murphy, L.Y., Mutchler, G.S., Napolitano, J., Nasseripour, R., Nelson, S.O., Niccolai, S., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niyazov, R.A., Nozar, M., Opper, A.K., O'Rielly, G.V., Osipenko, M., Park, K., Pasyuk, E., Peterson, G., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Riccardi, G., Ricco, G., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C., Santoro, J.P., Sapunenko, V., Schumacher, R.A., Serov, V.S., Shafi, A., Sharabian, Y.G., Shaw, J., Skabelin, A.V., Smith, E.S., Smith, T., Smith, L.C., Sober, D.I., Spraker, M., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Taylor, S., Tedeschi, D.J., Thompson, R., Todor, L., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weinstein, L.B., Weygand, D.P., Whisnant, C.S., Wolin, E., Wood, M.H., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., Zhou, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2003

22. Photoproduction of $\omega$ meson on the proton at large momentum transfer

Author

Battaglieri, M., Brunoldi, M., De Vita, R., Laget, J.M., Osiepenko, M., Ripani, M., Taiuti, M., Adams, G., Amaryan, M.J., Anciant, E., Anghinolfi, M., Armstrong, D.S., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Barrow, S., Beard, K., Bektasoglu, M., Berman, B.L., Bersani, A., Bianchi, N., Biselli, A., Boiarinov, S., Bouchigny, S., Branford, D., Bradford, R., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Calarco, J.R., Capitani, G.P., Carman, D.S., Carnahan, B., Cazes, A., Cetina, C., Cole, P.L., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., DeSanctis, E., Degtyarenko, P.V., Demirchyan, R., Denizli, H., Dennis, L., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Dodge, G.E., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Farhi, L., Feuerbach, R.J., Ficenec, J., Forest, T.A., Freyberger, A., Frolov, V., Funsten, H., Gaff, S., Gai, M., Garcon, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K., Golovach, E., Griffioen, K.A., Guidal, M., Guillo, M., Guo, L., Gyurjyan, V., Hadjidakis, C., Hancock, D., Hardie, J., Heddle, D., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hyde-Wright, C.E., Ito, M.M., Joo, K., Kelley, J.H., Khandaker, M., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Klusman, M., Kossov, M., Kramer, L.H., Kuhn, S.E., Lachniet, J., Lawrence, D., Lucas, M., Lukashin, K., Major, R.W., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mikhailov, K., Mirazita, M., Miskimen, R., Mokeev, V., Morrow, S., Mozer, M.U., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S., Niccolai, S., Niyazov, R.A., Nozar, M., Opper, A., O'Brien, J.T., Peterson, G., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Preedom, B.M., Price, J.W., Protopopescu, D., Qin, L.M., Raue, B.A., Reolon, A.R., Riccardi, G., Ricco, G., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabourov, K., Salgado, C.W., Sapunenko, V., Schumacher, R.A., Serov, V., Shafi, A., Sharabian, Y.G., Shaw, J., Skabelin, A., Smith, L.C., Sober, D.I., Stavinsky, A., Stepanyan, S., Stoler, P., Taylor, S., Tedeschi, D., Thompson, R., Vineyard, M.F., Vlassov, A., Wang, K., Weller, H., Weinstein, L.B., Weygand, D.P., Whisnant, S., Wolin, E., Yegneswaran, A., Yun, J., Zhou, Z., Zhang, B., Zhao, J., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and CLAS

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2003

23. $ep\rightarrow ep\pi^0$ reaction studied in the $\Delta$(1232)mass region using polarization asymmetries

Author

Biselli, A.S., Adams, G.S., Amaryan, M.J., Smith, L.C., Burkert, V.D., Minehart, R., Kuhn, S.E., Dodge, G.E., Forest, T.A., Taiuti, M., Anciant, E., Anghinolfi, M., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bertozzi, W., Bianchi, N., Boiarinov, S., Bosted, P., Bouchigny, S., Bradford, R., Branford, D., Brooks, W.K., Bueltmann, S., Butuceanu, C., Calarco, J.R., Carman, D.S., Carnahan, B., Cetina, C., Ciciani, L., Cole, P.L., Coleman, A., Connelly, J., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., De Sanctis, E., De Vita, R., Degtyarenko, P.V., Demirchyan, R., Denizli, H., Dennis, L., Dharmawardane, K.V., Djalali, C., Domingo, J., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., Efremenko, Y.V., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Farhi, L., Fatemi, R., Feuerbach, R.J., Ficenec, J., Fissum, K., Freyberger, A., Frolov, V., Funsten, H., Gaff, S.J., Gai, M., Gavalian, G., Gavrilov, V.B., Gilad, S., Gilfoyle, G.P., Giovanetti, K.L., Girard, Pascal, Golovatch, E., Gordon, C.I.O., Griffioen, K., Guidal, M., Guo, L., Guillo, M., Gyurjyan, V., Hancock, D., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ito, M.M., Jenkins, D., Joo, K., Keith, C., Kelley, J.H., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klimenko, A.V., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kuhn, J., Lachniet, J., Laget, J.M., Lawrence, D., Leskin, G.A., Loukachine, K., Major, R.W., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mirazita, M., Miskimen, R., Mokeev, V., Morrow, S., Muccifora, V., Mueller, J., Murphy, L.Y., Mutchler, G.S., Napolitano, J., Nelson, S.O., Niccolai, S., Niculescu, G., Niczyporuk, B., Niyazov, R.A., Nozar, M., O'Rielly, G.V., Ohandjanyan, M.S., Opper, A., Ossipenko, M., Park, K., Patois, Y., Peterson, G.A., Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Preedom, B.M., Price, J.W., Protopopescu, D., Qin, L.M., Raue, B.A., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rock, S., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabourov, K., Salgado, C.W., Sapunenko, V., Sargsyan, M., Schumacher, R.A., Serov, V.S., Sharabian, Y.G., Shaw, J., Shuvalov, S.M., Simionatto, S., Skabelin, A., Smith, E.S., Smith, T., Sober, D.I., Sorrell, L., Spraker, M., Stepanyan, S., Stoler, P., Taylor, S., Tedeschi, D., Thoma, U., Thompson, R., Todor, L., Tung, T.Y., Tur, C., Vineyard, M.F., Vlassov, A.V., Wang, K., Weinstein, L.B., Weller, H., Welsh, R., Weygand, D.P., Whisnant, S., Witkowski, M., Wolin, E., Wood, M.H., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., Zhou, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2003

24. Q$^2$ Dependence of Quadrupole Strength in the $\gamma$*p --> $\Delta^+$(1232) --> p$\pi^0$ Transition

Author

Joo, K., C. Smith, L., D. Burkert, V., Minehart, R., G. Aznauryan, I., Elouadrhiri, L., Stepanyan, S., S. Adams, G., J. Amaryan, M., Anciant, E., Anghinolfi, M., S. Armstrong, D., Asavapibhop, B., Audit, G., Auger, T., Avakian, H., Barrow, S., Bagdasaryan, H., Battaglieri, M., Beard, K., Bektasoglu, M., Bertozzi, W., Bianchi, N., S. Biselli, A., Boiarinov, S., E. Bonner, B., K. Brooks, W., R. Calarco, J., P. Capitani, G., S. Carman, D., Carnahan, B., L. Cole, P., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J., De Sanctis, E., De Vita, R., V. Degtyarenko, P., Demirchyan, R.A., Denizli, H., C. Dennis, L., Deppman, A., V. Dharmawardane, K., S. Dhuga, K., Djalali, C., E. Dodge, G., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., V. Efremenko, Y., Egiyan, H., S. Egiyan, K., Farhi, L., J. Feuerbach, R., Ficenec, J., Fissum, K., Forest, T.A., Funsten, H., Gai, M., B. Gavrilov, V., Gilad, S., P. Gilfoyle, G., L. Giovanetti, K., Girard, Pascal, A. Griffioen, K., Guidal, M., Guillo, M., Gyurjyan, V., Hancock, D., Hardie, J., Heddle, D., Heisenberg, J., W. Hersman, F., Hicks, K., S. Hicks, R., Holtrop, M., E. Hyde-Wright, C., M. Ito, M., Jenkins, D., H. Kelley, J., Khandaker, M., Y. Kim, K., Kim, W., Klein, A., J. Klein, F., Klusman, M., Kossov, M., Kuang, Y., E. Kuhn, S., M. Laget, J., Lawrence, D., Longhi, A., Loukachine, K., Lucas, M., W. Major, R., Manak, J.J., Marchand, C., K. Matthews, S., McAleer, S., W. C. Mcnabb, J., A. Mecking, B., D. Mestayer, M., Meyer, C.A., Mirazita, M., Miskimen, R., Muccifora, V., Mueller, J., S. Mutchler, G., Napolitano, J., Niculescu, G., Niczyporuk, B., A. Niyazov, R., S. Ohandjanyan, M., Opper, A., Patois, Y., A. Peterson, G., Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., M. Preedom, B., W. Price, J., M. Qin, L., A. Raue, B., R. Reolon, A., Riccardi, G., Ricco, G., Ripani, M., G. Ritchie, B., Ronchetti, F., Rossi, P., Rowntree, D., D. Rubin, P., W. Salgado, C., Sanzone, M., Sapunenko, V., Sargsyan, M., A. Schumacher, R., G. Sharabian, Y., Shaw, J., M. Shuvalov, S., Skabelin, A., S. Smith, E., Smith, T., I. Sober, D., Spraker, M., Stoler, P., Taiuti, M., Taylor, S., Tedeschi, D., Thompson, R., Todor, L., Y. Tung, T., F. Vineyard, M., Vlassov, A., Weller, H., B. Weinstein, L., Welsh, R., P. Weygand, D., Whisnant, S., Witkowski, M., Wolin, E., Yegneswaran, A., Yun, J., Zhou, Z., Zhao, J., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and CLAS

Subjects
Nuclear Theory, 13.60.Le, 13.40.Gp, 14.20.Gk, High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract

Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the Q2 dependence of the magnetic (M1+), electric (E1+), and scalar (S1+) multipoles in the gamma*p--Delta(+)--p pi(0) transition. We report new experimental values for the ratios E(1+)/M(1+) and S(1+)/M(1+) over the range Q2 = 0.4-1.8 GeV2, extracted from precision p(e,e(')p)pi(0) data using a truncated multipole expansion. Results are best described by recent unitary models in which the pion cloud plays a dominant role.

Published
2002

25. First measurement of the double spin asymmetry in $\vec e\vec p \rightarrow e'\pi^+ n$ in the resonance region

Author

De Vita, R., Anghinolfi, M., Burkert, V.D., Dodge, G.E., Minehart, R., Taiuti, M., Weller, H., Adams, G., Amaryan, M.J., Anciant, E., Armstrong, D.S., Asavapibhop, B., Asryan, G., Audit, G., Auger, T., Avakian, H., Bagdasaryan, H., Ball, J.P., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bianchi, N., Biselli, A.S., Boiarinov, S., Bonner, B.E., Bosted, P., Bouchigny, S., Branford, D., Brooks, W.K., Bueltmann, S., Calarco, J.R., Capitani, G.P., Carman, D.S., Carnahan, B., Cazes, A., Ciciani, L., Cole, P.L., Coleman, A., Connelly, J., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J.P., De-Sanctis, E., Degtyarenko, P.V., Demirchyan, R., Denizli, H., Dennis, L., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Doughty, D., Dragovitsch, P., Dugger, M., Dytman, S., Eckhause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Farhi, L., Fatemi, R., Feuerbach, R.J., Ficenec, J., Forest, T.A., Frolov, V., Funsten, H., Gaff, S.J., Gai, M., Garcon, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K.L., Girard, Pascal, Golovatch, E., Griffioen, K., Guidal, M., Guillo, M., Gyurjyan, V., Hadjidakis, C., Hancock, D., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ishkanov, B.S., Ito, M.M., Jenkins, D., Joo, K., Kelley, J.H., Kellie, J.D., Khandaker, M., Kim, K.Y., Kim, K., Kim, W., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Kramer, L.H., Kuang, Y., Kuhn, S.E., Lachniet, J., Laget, J.M., Lawrence, D., Li, J., Livingston, K., Longhi, A., Loukachine, K., Lucas, M., Major, W., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mikhailov, K.., Mirazita, M., Miskimen, R., Mokeev, V., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S.O., Niculescu, G., Niculescu, I., Niczyporuk, B.B., Niyazov, R.A., Opper, A.K., O'Rielly, G.V., Osipenko, M., Park, K., Pasyuk, E., Peterson, G., Philips, S.A., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Prok, Y., Protopopescu, D., Qin, L.M., Raue, B.A., Reolon, A.R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Rock, S., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C., Sapunenko, V., Sargsyan, M., Schumacher, R.A., Serov, V.S., Shafi, A., Sharabian, Y.G., Shaw, J., Skabelin, A.V., Smith, E.S., Smith, T., Smith, L.C., Sober, D.I., Sorrell, L., Spraker, M., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Taylor, S., Tedeschi, D.J., Thompson, R., Todor, L., Ungaro, M., Vineyard, M.F., Vlassov, A.V., Wang, K., Weinstein, L.B., Weisberg, A., Weygand, D.P., Whisnant, C.S., Wolin, E., Yegneswaran, A., Yun, J., Zhang, B., Zhao, J., Zhou, Z., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CLAS, and Robert, Suzanne

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2002

26. The ep$\rightarrow$e'p$\eta$ reaction at and above the S$_{11}$(1535) baryon resonance

Author

Thompson, R., Dytman, S., Kim, K Y., Mueller, J., Adams, G S., Amaryan, M J., Anciant, E., Anghinolfi, M., Asavapibhop, B., Auger, T., Audit, G., Avakian, H., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Berman, B L., Bertozzi, W., Bianchi, N., Biselli, A., Boiarinov, S., Bonner, B E., Briscoe, W J., Brooks, W., Burkert, V D., Calarco, J R., Capitani, G., Carman, D S., Carnahan, B., Cetina, C., Cole, P L., Coleman, A., Connelly, J., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J., Day, D., Degtyarenko, P V., Demirchyan, R A., Dennis, L C., Deppman, A., de Sanctis, E., de Vita, R., Dhuga, K S., Djalali, C., Dodge, G E., Doughty, D., Dragovitsch, P., Dugger, M., Eckhause, M., Efremenko, y V., Egiyan, H., Egiyan, K S., Elouadrhiri, L., Farhi, L., Feuerbach, R J., Ficenec, J., Fissum, K., Freyberger, A., Funsten, H., Gai, M., Gavrilov, V B., Gilfoyle, G P., Giovanetti, K., Gilad, S., Girard, Pascal, Griffioen, K A., Guidal, M., Guillo, M., Gyurjyan, V., Hancock, D., Hardie, J., Heddle, D., Heisenberg, J., Hersman, F W., Hicks, K., Hicks, R S., Holtrop, M., Hyde-Wright, C E., Ito, M M., Jenkins, D., Joo, K., Kane, J., Khandaker, M., Kim, W., Klein, A., Klein, F J., Klusman, M., Kossov, M., Kuhn, S E., Kuang, Y., Laget, J M., Lawrence, D., Leskin, G A., Longhi, A., Loukachine, K., Lucas, M., Magahiz, R., Major, R W., Manak, J J., Marchand, C., Matthews, S K., Maximon, L., Mcaleer, S., Mccarthy, J., Mcnabb, J W C., Mecking, B A., Mestayer, M D., Meyer, C A., Minehart, R., Mirazita, M., Miskimen, R., Muccifora, V., Murphy, L., Mutchler, G S., Napolitano, J., Niyazov, R A., Ohandjanyan, M S., O'Brien, J T., Opper, A., Patois, Y., Perrot-Kunne, F., Peterson, G A., Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Preedom, B M., Price, J W., Qin, L M., Raue, B A., Reolon, a R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B G., Ronchetti, F., Rossi, P., Roudot, F., Rowntree, D., Rubin, P D., Salgado, C W., Sanzone, M., Sapunenko, V., Sarty, A., Sargsyan, M., Schumacher, R A., Shafi, A., Sharabian, y G., Shaw, J., Shuvalov, S M., Skabelin, A., Smith, T., Smith, C., Smith, E S., Sober, D I., Spraker, M., Stepanyan, S., Stoler, P., Taiuti, M., Taragin, M F., Taylor, S., Tedeschi, D., Tung, T Y., Vineyard, M F., Vlassov, A., Weller, H., Weinstein, L B., Welsh, R., Weygand, D P., Whisnant, S., Witkowski, M., Wolin, E., Yegneswaran, A., Yun, J., Zhou, Z., Zhao, J., Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CLAS, and Robert, Suzanne

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, Nuclear Experiment
Abstract

New cross sections for the reaction e p -> ep eta are reported for total center of mass energy W = 1.5--1.86 GeV and invariant momentum transfer Q^2 = 0.25--1.5 GeV^2. This large kinematic range allows extraction of important new information about response functions, photocouplings, and eta N coupling strengths of baryon resonances. Expanded W coverage shows sharp structure at W \~ 1.7 GeV; this is shown to come from interference between S and P waves and can be interpreted in terms of known resonances. Improved values are derived for the photon coupling amplitude for the S11(1535) resonance.

Published
2001

27. Exclusive electroproduction of $\phi$ mesons at 4.2 GeV - Corrected article Phys.Rev.C63,065205(2001)

Author

Lukashin, K., Smith, E.S., Adams, G.S., Anciant, E., Anghinolfi, M., Asavapibhop, B., Auger, T., Audit, G., Avakian, H., Ball, J., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bertozzi, W., Bianchi, N., Biselli, A., Boiarinov, S., Bonner, B.E., Bouchigny, S., Branford, D., Briscoe, W.J., Brooks, W., Burkert, V.D., Calarco, J.R., Carman, D.S., Carnahan, B., Ciciani, L., Clark, R., Cole, P.L., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J., Degtyarenko, P.V., Dennis, L.C., De Sanctis, E., De Vita, R., Dhuga, K.S., Djalali, C., Dodge, G.E., Domingo, J., Doughty, D., Dragovitsch, P., Dytman, S., Eckause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Fatemi, R., Feuerbach, R.J., Ficenec, J., Fissum, K., Forest, T.A., Freyberger, A., Funsten, H., Gaff, S., Gai, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K., Girard, Pascal, Griffioen, K.A., Guidal, M., Guillo, M., Gyurjyan, V., Hardie, J., Heddle, D., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ito, M.M., Jenkins, D., Joo, K., Kelley, J., Khandaker, M., Kim, W., Kim, K.Y., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Kramer, L.J., Kuhn, S E., Laget, J.M., Lawrence, D., Longhi, A., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S., Niculescu, G., Niculescu, I., Niyazov, R.A., Opper, A., O'Rielly, G., O'Brien, J.T., Park, K., Paschke, K., Pasyuk, E., Peterson, G.A., Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Qin, L.M., Raue, B.A., Reolon, A.R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C.W., Sapunenko, V., Schumacher, R.A., Serov, V., Sharabian, Y.G., Shaw, J., Simionatto, S., Skabelin, A., Smith, L.C., Sober, D.I., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Taiuti, M., Taylor, S., Tedeschi, D., Thompson, R., Vineyard, M.F., Vlassov, A., Wang, K., Weller, H., Weinstein, L.B., Welsh, R., Weygand, D.P., Whisnant, S., Wolin, E., Yanik, L., Yegneswaran, A., Yun, J., Zhou, Z., Zhang, B., Zhao, J., Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2001

28. Electroproduction of the $\lambda$(1520) hyperon

Author

Barrow, S.P., Lukashin, K., Smith, E.S., Adams, G.S., Anciant, E., Anghinolfi, M., Asavapibhop, B., Auger, T., Audit, G., Avakian, H., Ball, J., Battaglieri, M., Beard, K., Bektasoglu, M., Bertozzi, W., Bianchi, N., Biselli, A., Boiarinov, S., Bonner, B.E., Bouchigny, S., Branford, D., Briscoe, W.J., Brooks, W., Burkert, V.D., Calarco, J.R., Carman, D.S., Carnahan, B., Ciciani, L., Clark, R., Cole, P.L., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J., Degtyarenko, P.V., Dennis, L.C., De Sanctis, E., De Vita, R., Dhuga, K.S., Djalali, C., Dodge, G.E., Domingo, J., Doughty, D., Dragovitsch, P., Dytman, S., Eckause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Fatemi, R., Feuerbach, R.J., Ficenec, J., Fissum, K., Forest, T.A., Freyberger, A., Funsten, H., Gaff, S., Gai, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K., Girard, Pascal, Griffioen, K.A., Guidal, M., Guillo, M., Gyurjyan, V., Hardie, J., Heddle, D., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ito, M.M., Jenkins, D., Joo, K., Kelley, J., Khandaker, M., Kim, W., Kim, K.Y., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Kramer, L.J., Kuhn, S E., Laget, J.M., Lawrence, D., Longhi, A., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S., Niculescu, G., Niculescu, I., Niyazov, R.A., Opper, A., O'Rielly, G., O'Brien, J.T., Park, K., Paschke, K., Pasyuk, E., Peterson, G.A., Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Qin, L.M., Raue, B.A., Reolon, A.R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C.W., Sapunenko, V., Schumacher, R.A., Serov, V., Sharabian, Y.G., Shaw, J., Simionatto, S., Skabelin, A., Smith, L.C., Sober, D.I., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Taiuti, M., Taylor, S., Tedeschi, D., Thompson, R., Vineyard, M.F., Vlassov, A., Wang, K., Weller, H., Weinstein, L.B., Welsh, R., Weygand, D.P., Whisnant, S., Wolin, E., Yanik, L., Yegneswaran, A., Yun, J., Zhou, Z., Zhang, B., Zhao, J., Robert, Suzanne, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2001

29. Exclusive electroproduction of $\phi$ mesons at 4.2 GeV

Author

Lukashin, K., Smith, E.S., Adams, G.S., Anciant, E., Anghinolfi, M., Asavapibhop, B., Auger, T., Audit, G., Avakian, H., Ball, J., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Bertozzi, W., Bianchi, N., Biselli, A., Boiarinov, S., Bonner, B.E., Bouchigny, S., Branford, D., Briscoe, W.J., Brooks, W., Burkert, V.D., Calarco, J.R., Carman, D.S., Carnahan, B., Ciciani, L., Clark, R., Cole, P.L., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J., Degtyarenko, P.V., Dennis, L.C., De Sanctis, E., De Vita, R., Dhuga, K.S., Djalali, C., Dodge, G.E., Domingo, J., Doughty, D., Dragovitsch, P., Dytman, S., Eckause, M., Egiyan, H., Egiyan, K.S., Elouadrhiri, L., Empl, A., Fatemi, R., Feuerbach, R.J., Ficenec, J., Fissum, K., Forest, T.A., Freyberger, A., Funsten, H., Gaff, S., Gai, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K., Girard, Pascal, Griffioen, K.A., Guidal, M., Guillo, M., Gyurjyan, V., Hardie, J., Heddle, D., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ito, M.M., Jenkins, D., Joo, K., Kelley, J., Khandaker, M., Kim, W., Kim, K.Y., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Kramer, L.J., Kuhn, S E., Laget, J.M., Lawrence, D., Longhi, A., Manak, J.J., Marchand, C., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Muccifora, V., Mueller, J., Mutchler, G.S., Napolitano, J., Nelson, S., Niculescu, G., Niculescu, I., Niyazov, R.A., Opper, A., O'Rielly, G., O'Brien, J.T., Park, K., Paschke, K., Pasyuk, E., Peterson, G.A., Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Pozdniakov, S., Preedom, B.M., Price, J.W., Qin, L.M., Raue, B.A., Reolon, A.R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C.W., Sapunenko, V., Schumacher, R.A., Serov, V., Sharabian, Y.G., Shaw, J., Simionatto, S., Skabelin, A., Smith, L.C., Sober, D.I., Stavinsky, A., Stepanyan, S., Stoler, P., Strakovsky, I.I., Taiuti, M., Taylor, S., Tedeschi, D., Thompson, R., Vineyard, M.F., Vlassov, A., Wang, K., Weller, H., Weinstein, L.B., Welsh, R., Weygand, D.P., Whisnant, S., Wolin, E., Yanik, L., Yegneswaran, A., Yun, J., Zhou, Z., Zhang, B., Zhao, J., Robert, Suzanne, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and CLAS

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2001

30. Observation of exclusive deeply virtual compton scattering in polarized electron beam asymmetry measurements

Author

Stepanyan, S., Burkert, V.D., Elouadrhiri, L., Adams, G.S., Anciant, E., Anghinolfi, M., Asavapibhop, B., Audit, G., Auger, T., Avakian, H., Ball, J., Barrow, S., Battaglieri, M., Beard, K., Bektasoglu, M., Berman, B.L., Bertin, P.Y., Bianchi, N., Biselli, A., Boiarinov, S., Bonner, B.E., Bouchigny, S., Branford, D., Briscoe, W.J., Brooks, W.K., Calarco, J.R., Carman, D.S., Carnahan, B., Cetina, C., Ciciani, L., Cole, P.L., Coleman, A., Cords, D., Corvisiero, P., Crabb, D., Crannell, H., Cummings, J., Degtiarenko, P.V., Denizli, H., Dennis, L.C., De Sanctis, E., De Vita, R., Dharmawardane, K.V., Dhuga, K.S., Djalali, C., Dodge, G.E., Dore, D., Doughty, D., Dragovitsch, P., Dytman, S., Eckhause, M., Egiyan, H., Egiyan, K.S., Empl, A., Fatemi, R., Feldman, G., Feuerbach, R.J., Ficenec, J., Fissum, K., Forest, T.A., Freyberger, A.P., Funsten, H., Gaff, S., Gai, M., Garcon, M., Gavalian, G., Gilad, S., Gilfoyle, G.P., Giovanetti, K., Girard, Pascal, Griffioen, K.A., Guidal, M., Guillo, M., Gyurjyan, V., Hadjidakis, C., Hardie, J., Heddle, D., Heimberg, P., Hersman, F.W., Hicks, K., Hicks, R.S., Holtrop, M., Hu, J., Hyde-Wright, C.E., Ito, M.M., Jenkins, D., Joo, K., Kelley, J., Khandaker, M., Kim, D.H., Kim, K., Kim, K.Y., Kim, W., Klein, A., Klein, F.J., Klusman, M., Kossov, M., Kramer, L.H., Kuhn, S.E., Laget, J.M., Lawrence, D., Longhi, A., Lukashin, K., Manak, J.J., Marchand, C., Maximon, L., McAleer, S., McCarthy, J., McNabb, J.W.C., Mecking, B.A., Mestayer, M.D., Meyer, C.A., Mikhailov, K., Minehart, R., Mirazita, M., Miskimen, R., Morand, L., Muccifora, V., Mueller, J., Murphy, L., Mutchler, G.S., Napolitano, J., Nelson, S., Niccolai, S., Niculescu, G., Niculescu, I., Niyazov, R.A., Opper, A., O'Rielly, G., O'Brien, J.T., Park, K., Pasyuk, E., Peterson, G.A., Philips, S., Pivnyuk, N., Pocanic, D., Pogorelko, O., Polli, E., Popa, I., Pozdniakov, S., Preedom, B.M., Price, J.W., Protopopescu, D., Qin, L.M., Raue, B.A., Reolon, A.R., Riccardi, G., Ricco, G., Ripani, M., Ritchie, B.G., Ronchetti, F., Rossi, P., Rowntree, D., Rubin, P.D., Sabatie, F., Sabourov, K., Salgado, C.W., Sapunenko, V., Schumacher, R.A., Serov, V., Shafi, A., Sharabian, Yu.G., Shaw, J., Simionatto, S., Skabelin, A., Smith, E.S., Smith, L.C., Sober, D.I., Stavinsky, A., Stoler, P., Strakovsky, I.I., Suleiman, R., Taiuti, M., Taylor, S., Tedeschi, D., Thompson, R., Todor, L., Vineyard, M.F., Vlassov, A., Wang, K., Weller, H., Weinstein, L.B., Welsh, R., Weygand, D.P., Whisnant, S., Wolin, E., Yanik, L., Yegneswaran, A., Yun, J., Zhao, J., Zhang, B., Zhou, Z., Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CLAS, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Robert, Suzanne

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2001

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