Search

Your search keyword '"Bantes R"' showing total 30 results
Start Over Author "Bantes R"
30 results on '"Bantes R"'

1. Photoproduction of Neutral Pions off Protons

Author

Collaboration, The CBELSA/TAPS, Crede, V., Sparks, N., Wilson, A., Anisovich, A. V., Bacelar, J. C. S., Bantes, R., Bartholomy, O., Bayadilov, D., Beck, R., Beloglazov, Y. A., Castelijns, R., Dutz, H., Elsner, D., Ewald, R., Frommberger, F., Funke, Chr., Gregor, R., Gridnev, A., Gutz, E., Hillert, W., Hoffmeister, P., Jaegle, I., Junkersfeld, J., Kalinowsky, H., Kammer, S., Klein, Frank, Klein, Friedrich, Klempt, E., Kotulla, M., Krusche, B., Loehner, H., Lopatin, I. V., Lugert, S., Menze, D., Mertens, T., Messchendorp, J. G., Metag, V., Nanova, M., Nikonov, V. A., Novinski, D., Novotny, R., Ostrick, M., Pant, L. M., van Pee, H., Pfeiffer, M., Roy, A., Sarantsev, A. V., Schadmand, S., Schmidt, C., Schmieden, H., Schoch, B., Shende, S., Sokhoyan, V., Suele, A., Sumachev, V. V., Szczepanek, T., Thoma, U., Trnka, D., Varma, R., Walther, D., and Wendel, Ch.

Subjects
Nuclear Experiment, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector in the reaction $\gamma p\to p\pi^0$ for photon energies between 0.85 and 2.50 GeV. The $\pi^0$ mesons are observed in their dominant neutral decay mode: $\pi^0\to\gamma\gamma$. For the first time, the differential cross sections cover the very forward region, $\theta_{\rm c.m.}<60^\circ$. A partial-wave analysis of these data within the Bonn-Gatchina framework observes the high-mass resonances $G_{17}$(2190), $D_{13}$(2080), and $D_{15}$(2070)., Comment: 12 pages, 9 figures, minor modifications to PWA section

Published
2011
Full Text
View/download PDF

2. Measurement of the Beam Asymmetry $\Sigma$ in the Forward Direction for pi0 Photoproduction

Author

Sparks, N., Crede, V., Anisovich, A. V., Bacelar, J. C. S., Bantes, R., Bartholomy, O., Bayadilov, D., Beck, R., Beloglazov, Y. A., Castelijns, R., Elsner, D., Ewald, R., Frommberger, F., Funke, C., Gregor, R., Gridnev, A., Gutz, E., Hillert, W., Hoffmeister, P., Jaegle, I., Junkersfeld, J., Kalinowsky, H., Kammer, S., Klein, Frank, Klein, Friedrich, Klempt, E., Kotulla, M., Krusche, B., Loehner, H., Lopatin, I. V., Lugert, S., Menze, D., Mertens, T., Messchendorp, J. G., Metag, V., Nanova, M., Nikonov, V. A., Novinski, D., Novotny, R., Ostrick, M., Pant, L. M., Pee, H., Pfeiffer, M., Roy, A., Sarantsev, A. V., Schadmand, S., Schmidt, C., Schmieden, H., Schoch, B., Shende, S., Sokhoyan, V., Suele, A., Sumachev, V. V., Szczepanek, T., Thoma, U., Trnka, D., Varma, R., Walther, D., Wendel, C., and Wilson, A.

Subjects
Nuclear Experiment, High Energy Physics - Experiment
Abstract

Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector for photon energies between 0.92 and 1.68~GeV at the electron accelerator ELSA. The beam asymmetry~$\Sigma$ has been extracted for $115^\circ < \theta_{\rm c.m.} < 155^\circ$ of the $\pi^0$~meson and for $\theta_{\rm c.m.} < 60^\circ$. The new beam asymmetry data improve the world database for photon energies above 1.5~GeV and, by covering the very forward region, extend previously published data for the same reaction by our collaboration. The angular dependence of $\Sigma$ shows overall good agreement with the SAID parameterization., Comment: 11 pages, 10 figures, published in Phys. Rev. C, included LEPS data and MAID 2007 predictions for comparison with our data

Published
2010
Full Text
View/download PDF

3. Photoproduction of $\eta$ and $\eta\prime$ Mesons off Protons

Author

CBELSA, The, Collaboration, TAPS, Crede, Volker, McVeigh, A., Anisovich, A., Bacelar, J., Bantes, R., Bartholomy, O., Bayadilov, D., Beck, R., Beloglazov, Y., Castelijns, R., Ehmanns, A., Elsner, D., Essig, K., Ewald, R., Fabry, I., Fuchs, M., Funke, C., Gothe, R., Gregor, R., Gridnev, A., Gutz, E., Hoeffgen, S., Hoffmeister, P., Horn, I., Jaegle, I., Junkersfeld, J., Kalinowsky, H., Kammer, S., Klein, Frank, Klein, Friedrich, Klempt, E., Konrad, M., Kotulla, M., Krusche, B., Langheinrich, J., Loehner, H., Lopatin, I., Lotz, J., Lugert, S., Menze, D., Mertens, T., Messchendorp, J., Metag, V., Nanova, M., Nikonov, V., Novinski, D., Novotny, R., Ostrick, M., Pant, L., van Pee, H., Pfeiffer, M., Roy, A., Sarantsev, A., Schadmand, S., Schmidt, C., Schmieden, H., Schoch, B., Shende, S., Sparks, N., Suele, A., Sumachev, V., Szczepanek, T., Thoma, U., Trnka, D., Varma, R., Walther, D., Weinheimer, C., Wendel, C., and Wilson, A.

Subjects
Nuclear Experiment
Abstract

Total and differential cross sections for $\eta$ and $\eta ^\prime$ photoproduction off the proton have been determined with the CBELSA/TAPS detector for photon energies between 0.85 and 2.55 GeV. The $\eta$ mesons are detected in their two neutral decay modes, $\eta\to\gamma\gamma$ and $\eta\to 3\pi^0\to 6\gamma$, and for the first time, cover the full angular range in $\rm cos \theta_{cm}$ of the $\eta$ meson. These new $\eta$ photoproduction data are consistent with the earlier CB-ELSA results. The $\eta ^\prime$ mesons are observed in their neutral decay to $\pi^0\pi^0\eta\to 6\gamma$ and also extend the coverage in angular range., Comment: 13 pages, 21 figures, updated author list, submitted to PRC

Published
2009
Full Text
View/download PDF

4. N* and Delta* decays into N pi0 pi0

Author

Thoma, U., Fuchs, M., Anisovich, A. V., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Yu., Crede, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Foesel, A., Funke, Chr., Gothe, R., Gridnev, A., Gutz, E., Hoeffgen, St., Horn, I., Hoessl, J., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Loehner, H., Lopatin, I., Lotz, J., Matthaey, H., Menze, D., Nikonov, V. A., Novinski, D., Ostrick, M., van Pee, H., Sarantsev, A. V., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Walther, D., and Weinheimer, Chr.

Subjects
High Energy Physics - Phenomenology
Abstract

Decays of baryon resonances in the second and the third resonance region into N pi0 pi0 are studied by photoproduction of two neutral pions off protons. Partial decay widths of N* and Delta* resonances decaying into Delta(1232) pi, N(\pi\pi)_{S}, N(1440)P_{11} pi, and N(1520)D_{13} pi are determined in a partial wave analysis of this data, and data from other reactions. Several partial decay widths were not known before. Interesting decay patterns are observed which are not even qualitatively reproduced by quark model calculations. In the second resonance region, decays into Delta(1232) pi dominate clearly. The N(\pi\pi)_{S}-wave provides a significant contribution to the cross section, especially in the third resonance region. The P_{13}(1720) properties found here are at clear variance to PDG values., Comment: 13 pages, 4 figures, long author's list

Published
2007
Full Text
View/download PDF

5. Study of the reaction γp → pπ0η

Author

Horn, I., Anisovich, A. V., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Y., Bogendörfer, R., Castelijns, R., Credé, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Fösel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., Gutz, E., Höffgen, S., Hößl, J., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I., Lotz, J., Matthäy, H., Menze, D., Messchendorp, J., Metag, V., Nikonov, V. A., Novinski, D., Ostrick, M., van Pee, H., Sarantsev, A. V., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., and The CB-ELSA Collaboration

Published
2008
Full Text
View/download PDF

6. Photoproduction of η -mesons off protons

Author

Bartholomy, O., Bogendörfer, R., Credé, V., Fabry, I., Anisovich, A. V., Anton, G., Bantes, R., Beloglazov, Y. A., Castelijns, R., Ehmanns, A., Ernst, J., Flemming, H., Fösel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A. B., Gutz, E., Höffgen, S., Horn, I., Hößl, J., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I. V., Lotz, J., Matthäy, H., Menze, D., Messchendorp, J., Nikonov, V. A., Novinski, D. V., Ostrick, M., van Pee, H., Radkov, A. K., Sarantsev, A. V., Schadmand, S., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V. V., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., and The CB-ELSA Collaboration

Published
2007
Full Text
View/download PDF

7. Photoproduction of π 0 ω off protons for E γ ≤3 GeV

Author

Junkersfeld, J., Anisovich, A. V., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Yu., Bogendörfer, R., Castelijns, R., Crede, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Fösel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., Gutz, E., Höffgen, St., Horn, I., Hößl, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I., Lotz, J., Matthäy, H., Menze, D., Messchendorp, J., Nikonov, V. A., Novinski, D., Ostrick, M., van Pee, H., Radkov, A., Sarantsev, A. V., Schadmand, S., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., and The CB-ELSA Collaboration

Published
2007
Full Text
View/download PDF

8. Photoproduction of πmesons off protons from the Δ(1232) region to Eγ = 3 GeV

Author

van Pee, H., Bartholomy, O., Crede, V., Anisovich, A. V., Anton, G., Bantes, R., Beloglazov, Yu., Bogendörfer, R., Castelijns, R., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Fösel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., Gutz, E., Höffgen, St., Horn, I., Hößl, J., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I., Lotz, J., Matthäy, H., Menze, D., Messchendorp, J., Nikonov, V. A., Novinski, D., Ostrick, M., Radkov, A., Sarantsev, A. V., Schadmand, S., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., and The CB-ELSA Collaboration

Published
2007
Full Text
View/download PDF

9. Photoproduction of eta and eta(') mesons off protons

Author

Crede, V., McVeigh, A., Anisovich, A. V., Bacelar, J. C. S., Bantes, R., Bartholomy, O., Bayadilov, D., Beck, R., Beloglazov, Y. A., Castelijns, R., Ehmanns, A., Elsner, D., Essig, K., Ewald, R., Fabry, I., Fuchs, M., Funke, Chr., Gothe, R., Gregor, R., Gridnev, A., Gutz, E., Hoeffgen, St., Hoffmeister, P., Horn, I., Jaegle, I., Junkersfeld, J., Kalinowsky, H., Kammer, S., Klein, Frank, Klein, Friedrich, Klempt, E., Konrad, M., Kotulla, M., Krusche, B., Langheinrich, J., Löhner, Herbert, Lopatin, I. V., Lotz, J., Lugert, S., Menze, D., Mertens, T., Messchendorp, J. G., Metag, V., Nanova, M., Nikonov, V. A., Novinski, D., Novotny, R., Ostrick, M., Schadmand, S., Shende, S., and KVI - Center for Advanced Radiation Technology

Subjects
BARYONS, TARGET, STATES, Nuclear Theory, NUCLEON RESONANCE, BEAM ASYMMETRY, CHIRAL DYNAMICS, High Energy Physics::Experiment, SPECTROMETER, Nuclear Experiment, PHOTONS, THRESHOLD, REGION
Abstract

Total and differential cross sections for eta and eta(')photoproduction off the proton have been determined with the CBELSA/TAPS detector for photon energies between 0.85 and 2.55 GeV. The eta mesons are detected in their two neutral decay modes, eta ->gamma gamma and eta -> 3 pi(0)-> 6 gamma, and for the first time, cover the full angular range in cos theta(c.m.) of the eta meson. These new eta photoproduction data are consistent with the earlier CB-ELSA results. The eta(') mesons are observed in their neutral decay to pi(0)pi(0)eta -> 6 gamma and also extend the coverage in angular range.

Published
2009

10. Evidence for a Parity Doublet Delta(1920)P-33 and Delta(1940)D-33 from gamma p -> p pi(0)eta

Author

Horn, I., Anisovich, A. V., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Yu., Bogendoerfer, R., Castelijns, R., Crede, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Foesel, A., Fuchs, M., Funke, Chr., Gothe, R., Gridnev, A., Gutz, E., Hoeffgen, St., Hoessl, J., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Loehner, H., Lopatin, I., Lotz, J., Matthaey, H., Menze, D., Messchendorp, J., Metag, V., Nikonov, V. A., Novinski, D., Ostrick, M., van Pee, H., Sarantsev, A. V., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., and KVI - Center for Advanced Radiation Technology

Subjects
BARYON RESONANCES, PHOTOPRODUCTION, Nuclear Experiment, ELSA, DECAYS, RESTORATION
Abstract

Evidence is reported for the existence of a parity doublet of Delta resonances with total angular momentum J=3/2 from photoproduction of the p pi(0)eta final state. The two parity partners Delta(1920)P-33 and Delta(1940)D-33 make significant contributions to the reaction. Cascades of resonances into Delta(1232)eta, N(1535)pi, and Na-0(980) are clearly observed.

Published
2008

11. Study of the reaction gamma p -> p pi(0)eta

Author

Horn, I., Anisovich, A. V., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Y., Bogendoerfer, R., Castelijns, R., Crede, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Foesel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., Gutz, E., Hoeffgen, S., Hoessi, J., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Loehner, H., Lopatin, I., Lotz, J., Matthaey, H., Menze, D., Messchendorp, J., Metag, V., Nikonov, V. A., Novinski, D., Ostrick, M., van Pee, H., Sarantsev, A. V., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., and KVI - Center for Advanced Radiation Technology

Subjects
CHIRAL-SYMMETRY, RELATIVISTIC QUARK-MODEL, PHOTON ENERGIES, STRANGE-BARYON SPECTRUM, BEAM ASYMMETRY, PHOTOPRODUCTION, PARITY DOUBLETS, RESONANCE, OPERATOR EXPANSION METHOD, PARTIAL-WAVE
Abstract

The reaction gamma p -> p pi(0)eta has been studied with the CBELSA detector at the tagged photon beam of the Bonn electron stretcher facility. The reaction shows contributions from Delta(+)(1232)eta, N(1535)(+) pi(0) and pa(0)(980) as intermediate states. A partial-wave analysis suggests that the reaction proceeds via formation of six Delta-resonances, Delta(1600)P-33, Delta(1920)P-33, Delta(1700)D-33, Delta(1940)D-33, Delta(1905)F-35, Delta(2360)D-33, and two nucleon resonances N(1880)P-11 and N(2200)P-13, for which pole positions and decay branching ratios are given.

Published
2008

12. Evidence for a parity doublet Delta(1920)Rho33 and Delta(1940)Delta33 from gamma-rho -> rho-pi0eta

Author

Horn, I., Anisovich, A.V., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, A., Bogendörfer, R., Castelijns, R., Crede, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Foesel, A., Fuchs, M., Funke, C., Gothe, R., Gridnev, A.B., Gutz, E., Höffgen, Stefan, Hössl, J., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I.V., Lotz, J., Matthaey, H., Menze, D., Messchendorp, J.G., Metag, V., Nikonov, V.A., Novinski, D.V., Ostrick, M., Pee, H. van, Sarantsev, A.V., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, C., and Publica

Abstract

Evidence is reported for the existence of a parity doublet of Delta resonances with total angular momentum J =3/2 from photoproduction of the rho-pi0eta final state. The two parity partners Delta(1920)Rho33 and Delta(1940)Delta33 make significant contributions to the reaction. Cascades of resonances into Delta(1232)eta, Ni(1535)pi, and Na0(980) are clearly observed.

Published
2008

13. Photoproduction of π0-mesons off protons from the ∆(1232) region to Eγ = 3 GeV: Photoproduction of π0-mesons off protons from the ∆(1232) region to Eγ = 3 GeV

Author

van Pee, H., Bartholomy, O., Crede, V., Anisovich, A. V., Anton, G., Bantes, R., Beloglazov, Yu., Bogendoerfer, R., Castelijns, Ralph, Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Foesel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., Gutz, E., Hoeffgen, St., Horn, I., Hoessl, J., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Loehner, H., Lopatin, I., Lotz, J., Matthaey, H., Menze, D., Messchendorp, J., Nikonov, V. A., Novinski, D., Ostrick, M., Radkov, A., Sarantsev, A. V., Schadmand, Susan, Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., KVI - Center for Advanced Radiation Technology, and Research unit Nuclear & Hadron Physics

Subjects
RELATIVISTIC QUARK-MODEL, MAGNETIC MOMENTS, NEUTRAL PION-PHOTOPRODUCTION, PHOTON ENERGIES, STRANGE-BARYON SPECTRUM, High Energy Physics::Experiment, SUM RULE, NEAR-THRESHOLD, FORCES, Nuclear Experiment, CROSS-SECTION, ETA
Abstract

Photoproduction of pi(0)-mesons was studied with the Crystal-Barrel detector at ELSA for incident energies from 300 MeV to 3 GeV. Differential cross-sections d sigma/d Omega, d sigma/dt, and the total cross-section are presented. For E (gamma)

Published
2007

14. Neutral-pion photoproduction off protons in the energy range 0.3 GeV <E(gamma)<3 GeV

Author

Bartholomy, O., Crede, V., van Pee, H., Anisovich, A.V., Anton, G., Bantes, R., Beloglazov, Yu., Bogendorfer, R., Castelijns, R.J.J., Ehmanns, A., Ernst, J.M.P.G., Fabry, I., Flemming, H., Fosel, A., Freiesleben, H., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., Gutz, E., Höffgen, S.K., Horn, I., Hossl, J., Joosten, R., Junkersfeld, J., Kalinowsky, H., Klein, F, Klempt, E., Koch, H.R., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I., Lotz, J., Matthay, H., Menze, D.W., Messchendorp, J.G., Morales, C., Novinski, D., Ostrick, M., Radkov, A., Reinnarth, J., Sarantsev, A.V., Schadmand, S., Schmidt, Ch., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., and Research unit Nuclear & Hadron Physics

Subjects
PARAMETERS, SIGMA
Abstract

Single pi(0) photoproduction has been studied with the CB-ELSA experiment at Bonn using tagged photon energies between 0.3 and 3.0 GeV. The experimental setup covers a very large solid angle of similar to98% of 4pi. Differential cross sections dsigma/dOmega have been measured. Complicated structures in the angular distributions indicate a variety of different resonances being produced in the s channel intermediate state gammap-->N(*)(Delta(*))-->ppi(0). A combined analysis including the data presented in this letter along with other data sets reveals contributions from known resonances and evidence for a new resonance N(2070)D(15).

Published
2005

15. Photoproduction of eta mesons off protons for 0.75 GeV

Author

Crede, V., Bartholomy, O., Anisovich, A.V., Anton, G., Bantes, R., Beloglazov, Yu., Bogendorfer, R., Castelijns, R.J.J., Ehmanns, A., Ernst, J.M.P.G., Fabry, I., Flemming, H., Fosel, A., Freiesleben, H., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., Gutz, E., Hoffgen, S.K., Horn, I., Hosl, J., Joosten, R., Junkersfeld, J., Kalinowsky, H., Klein, F, Klempt, E., Koch, H.R., Konrad, M., Kopf, B., Krusche, B., Langheinrich, J., Löhner, H., Lopatin, I., Lotz, J., Matthay, H., Menze, D.W., Messchendorp, J.G., Morales, C., Novinski, D., Ostrick, M., van Pee, H., Radkov, A., Reinnarth, J., Sarantsev, A.V., Schadmand, S., Schmidt, Ch., Schmieden, H., Schoch, B., Suft, G., Sumachev, V., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., and KVI - Center for Advanced Radiation Technology

Subjects
Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Experiment, PION-PHOTOPRODUCTION, Nuclear Experiment, RESONANCES, SIGMA, THRESHOLD
Abstract

Total and differential cross sections for the reaction p(gamma,eta)p have been measured for photon energies in the range from 750 MeV to 3 GeV. The low-energy data are dominated by the S-11 wave which has two poles in the energy region below 2 GeV. Eleven nucleon resonances are observed in their decay into peta. At medium energies we find evidence for a new resonance N(2070)D-15 with (M,Gamma)=(2068+/-22, 295+/-40) MeV. At gamma energies above 1.5 GeV, a strong peak in the forward direction develops, signaling the exchange of vector mesons in the t channel.

Published
2005

16. Neutral-pion photoproduction off protons in the energy range 0.3 GeV kleiner E(gamma) kleiner 3 GeV

Author

Bartholomy, O., Crede, V., Flemming, J. K., Fosel, P. S., Freiesleben, H., Fuchs, M., Funke, C., Gothe, R., Gridnev, A. B., Gutz, E., Hoeffgen, S., Horn, I., Anisovich, A., Hossl, J., Joosten, R., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Anton, G., Langheinrich, J., Loehner, H., Lopatin, I. V., Lotz, J., Matthay, G. G., Menze, D., Messchendorp, J. G., Morales, C., Novinski, D., Ostrick, M., Bantes, R., van Pee, H., Radkov, J. O., Reinnarth, J., Sarantsev, A., Schadmand, S., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V. V., Beloglazov, Y. A., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., Bogendoerfer, R., Ehmanns, A., Ernst, J., and Fabry, I.

Subjects
experimental results [four-pi-detector], exclusive reaction [photon p], tagged beam [photon], angular dependence [differential cross section], ddc:550, Bonn ELSA Stor, partial wave analysis, intermediate state [nucleon resonance], energy dependence [channel cross section], photoproduction [pi0], +p+pi0%22">photon p --> p pi0, 0.3-3.0 GeV
Abstract

Single pi(0) photoproduction has been studied with the CB-ELSA experiment at Bonn using tagged photon energies between 0.3 and 3.0 GeV. The experimental setup covers a very large solid angle of similar to98% of 4pi. Differential cross sections dsigma/dOmega have been measured. Complicated structures in the angular distributions indicate a variety of different resonances being produced in the s channel intermediate state gammap-->N-*(Delta(*))-->ppi(0). A combined analysis including the data presented in this letter along with other data sets reveals contributions from known resonances and evidence for a new resonance N(2070)D-15.

Published
2005
Full Text
View/download PDF

17. Photoproduction of eta mesons off protons for 0.75 GeV kleiner E(gamma) kleiner 3 GeV

Author

Crede, V., Bartholomy, O., Flemming, J. K., Fosel, P. S., Freiesleben, H., Fuchs, M., Funke, C., Gothe, R., Gridnev, A. B., Gutz, E., Hoeffgen, S., Horn, I., Anisovich, A., Hossl, J., Joosten, R., Junkersfeld, J., Kalinowsky, H., Klein, F., Klempt, E., Koch, H., Konrad, M., Kopf, B., Krusche, B., Anton, G., Langheinrich, J., Loehner, H., Lopatin, I. V., Lotz, J., Matthay, G. G., Menze, D., Messchendorp, J. G., Morales, C., Novinski, D., Ostrick, M., Bantes, R., van Pee, H., Radkov, J. O., Reinnarth, J., Sarantsev, A., Schadmand, S., Schmidt, C., Schmieden, H., Schoch, B., Suft, G., Sumachev, V. V., Beloglazov, Y. A., Szczepanek, T., Thoma, U., Walther, D., Weinheimer, Ch., Bogendoerfer, R., Ehmanns, A., Ernst, J., and Fabry, I.

Subjects
photoproduction [eta], +p+eta%22">photon p --> p eta, Astrophysics::High Energy Astrophysical Phenomena, width [nucleon resonance], +2photon%22">eta --> 2photon, decay modes [eta], mass spectrum [nucleon resonance], energy dependence [channel cross section], experimental results [four-pi-detector], exclusive reaction [photon p], 0.7-3.0 GeV, ddc:550, Bonn ELSA Stor, High Energy Physics::Experiment, angular distribution, intermediate state [nucleon resonance], Nuclear Experiment, +3pi0%22">eta --> 3pi0, isobar model
Abstract

Total and differential cross sections for the reaction p(gamma,eta)p have been measured for photon energies in the range from 750 MeV to 3 GeV. The low-energy data are dominated by the S-11 wave which has two poles in the energy region below 2 GeV. Eleven nucleon resonances are observed in their decay into peta. At medium energies we find evidence for a new resonance N(2070)D-15 with (M,Gamma)=(2068+/-22, 295+/-40) MeV. At gamma energies above 1.5 GeV, a strong peak in the forward direction develops, signaling the exchange of vector mesons in the t channel.

Published
2005
Full Text
View/download PDF

18. Photoproduction of neutral pions off protons

Author

Crede, V., primary, Sparks, N., additional, Wilson, A., additional, Anisovich, A. V., additional, Bacelar, J. C. S., additional, Bantes, R., additional, Bartholomy, O., additional, Bayadilov, D., additional, Beck, R., additional, Beloglazov, Y. A., additional, Castelijns, R., additional, Dutz, H., additional, Elsner, D., additional, Ewald, R., additional, Frommberger, F., additional, Funke, Chr., additional, Gregor, R., additional, Gridnev, A., additional, Gutz, E., additional, Hillert, W., additional, Hoffmeister, P., additional, Jaegle, I., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Kammer, S., additional, Klein, Frank, additional, Klein, Friedrich, additional, Klempt, E., additional, Kotulla, M., additional, Krusche, B., additional, Löhner, H., additional, Lopatin, I. V., additional, Lugert, S., additional, Menze, D., additional, Mertens, T., additional, Messchendorp, J. G., additional, Metag, V., additional, Nanova, M., additional, Nikonov, V. A., additional, Novinski, D., additional, Novotny, R., additional, Ostrick, M., additional, Pant, L. M., additional, van Pee, H., additional, Pfeiffer, M., additional, Roy, A., additional, Sarantsev, A. V., additional, Schadmand, S., additional, Schmidt, C., additional, Schmieden, H., additional, Schoch, B., additional, Shende, S., additional, Sokhoyan, V., additional, Süle, A., additional, Sumachev, V. V., additional, Szczepanek, T., additional, Thoma, U., additional, Trnka, D., additional, Varma, R., additional, Walther, D., additional, and Wendel, Ch., additional

Published
2011
Full Text
View/download PDF

19. Measurement of the beam asymmetryΣin the forward direction forγ⃗p→pπ0

Author

Sparks, N., primary, Crede, V., additional, Anisovich, A. V., additional, Bacelar, J. C. S., additional, Bantes, R., additional, Bartholomy, O., additional, Bayadilov, D., additional, Beck, R., additional, Beloglazov, Y. A., additional, Castelijns, R., additional, Elsner, D., additional, Ewald, R., additional, Frommberger, F., additional, Funke, Chr., additional, Gregor, R., additional, Gridnev, A., additional, Gutz, E., additional, Hillert, W., additional, Hoffmeister, P., additional, Jaegle, I., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Kammer, S., additional, Klein, Frank, additional, Klein, Friedrich, additional, Klempt, E., additional, Kotulla, M., additional, Krusche, B., additional, Löhner, H., additional, Lopatin, I. V., additional, Lugert, S., additional, Menze, D., additional, Mertens, T., additional, Messchendorp, J. G., additional, Metag, V., additional, Nanova, M., additional, Nikonov, V. A., additional, Novinski, D., additional, Novotny, R., additional, Ostrick, M., additional, Pant, L. M., additional, van Pee, H., additional, Pfeiffer, M., additional, Roy, A., additional, Sarantsev, A. V., additional, Schadmand, S., additional, Schmidt, C., additional, Schmieden, H., additional, Schoch, B., additional, Shende, S., additional, Sokhoyan, V., additional, Süle, A., additional, Sumachev, V. V., additional, Szczepanek, T., additional, Thoma, U., additional, Trnka, D., additional, Varma, R., additional, Walther, D., additional, Wendel, Ch., additional, and Wilson, A., additional

Published
2010
Full Text
View/download PDF

20. Photoproduction ofηandη'mesons off protons

Author

Crede, V., primary, McVeigh, A., additional, Anisovich, A. V., additional, Bacelar, J. C. S., additional, Bantes, R., additional, Bartholomy, O., additional, Bayadilov, D., additional, Beck, R., additional, Beloglazov, Y. A., additional, Castelijns, R., additional, Ehmanns, A., additional, Elsner, D., additional, Essig, K., additional, Ewald, R., additional, Fabry, I., additional, Fuchs, M., additional, Funke, Chr., additional, Gothe, R., additional, Gregor, R., additional, Gridnev, A., additional, Gutz, E., additional, Höffgen, St., additional, Hoffmeister, P., additional, Horn, I., additional, Jaegle, I., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Kammer, S., additional, Klein, Frank, additional, Klein, Friedrich, additional, Klempt, E., additional, Konrad, M., additional, Kotulla, M., additional, Krusche, B., additional, Langheinrich, J., additional, Löhner, H., additional, Lopatin, I. V., additional, Lotz, J., additional, Lugert, S., additional, Menze, D., additional, Mertens, T., additional, Messchendorp, J. G., additional, Metag, V., additional, Nanova, M., additional, Nikonov, V. A., additional, Novinski, D., additional, Novotny, R., additional, Ostrick, M., additional, Pant, L. M., additional, van Pee, H., additional, Pfeiffer, M., additional, Roy, A., additional, Sarantsev, A. V., additional, Schadmand, S., additional, Schmidt, C., additional, Schmieden, H., additional, Schoch, B., additional, Shende, S., additional, Sokhoyan, V., additional, Sparks, N., additional, Süle, A., additional, Sumachev, V. V., additional, Szczepanek, T., additional, Thoma, U., additional, Trnka, D., additional, Varma, R., additional, Walther, D., additional, Weinheimer, Ch., additional, Wendel, Ch., additional, and Wilson, A., additional

Published
2009
Full Text
View/download PDF

21. New results on the Roper resonance and the P11 partial wave

Author

Sarantsev, A.V., primary, Fuchs, M., additional, Kotulla, M., additional, Thoma, U., additional, Ahrens, J., additional, Annand, J.R.M., additional, Anisovich, A.V., additional, Anton, G., additional, Bantes, R., additional, Bartholomy, O., additional, Beck, R., additional, Beloglazov, Yu., additional, Castelijns, R., additional, Crede, V., additional, Ehmanns, A., additional, Ernst, J., additional, Fabry, I., additional, Flemming, H., additional, Fösel, A., additional, Funke, Chr., additional, Gothe, R., additional, Gridnev, A., additional, Gutz, E., additional, Höffgen, St., additional, Horn, I., additional, Hößl, J., additional, Hornidge, D., additional, Janssen, S., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Klein, F., additional, Klempt, E., additional, Koch, H., additional, Konrad, M., additional, Kopf, B., additional, Krusche, B., additional, Langheinrich, J., additional, Löhner, H., additional, Lopatin, I., additional, Lotz, J., additional, McGeorge, J.C., additional, MacGregor, I.J.D., additional, Matthäy, H., additional, Menze, D., additional, Messchendorp, J.G., additional, Metag, V., additional, Nikonov, V.A., additional, Novinski, D., additional, Novotny, R., additional, Ostrick, M., additional, van Pee, H., additional, Pfeiffer, M., additional, Radkov, A., additional, Rosner, G., additional, Rost, M., additional, Schmidt, C., additional, Schoch, B., additional, Suft, G., additional, Sumachev, V., additional, Szczepanek, T., additional, Walther, D., additional, Watts, D.P., additional, and Weinheimer, Chr., additional

Published
2008
Full Text
View/download PDF

22. N∗ and Δ∗ decays into Nπ0π0

Author

Thoma, U., primary, Fuchs, M., additional, Anisovich, A.V., additional, Anton, G., additional, Bantes, R., additional, Bartholomy, O., additional, Beck, R., additional, Beloglazov, Yu., additional, Crede, V., additional, Ehmanns, A., additional, Ernst, J., additional, Fabry, I., additional, Flemming, H., additional, Fösel, A., additional, Funke, Chr., additional, Gothe, R., additional, Gridnev, A., additional, Gutz, E., additional, Höffgen, St., additional, Horn, I., additional, Hößl, J., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Klein, F., additional, Klempt, E., additional, Koch, H., additional, Konrad, M., additional, Kopf, B., additional, Krusche, B., additional, Langheinrich, J., additional, Löhner, H., additional, Lopatin, I., additional, Lotz, J., additional, Matthäy, H., additional, Menze, D., additional, Nikonov, V.A., additional, Novinski, D., additional, Ostrick, M., additional, van Pee, H., additional, Sarantsev, A.V., additional, Schmidt, C., additional, Schmieden, H., additional, Schoch, B., additional, Suft, G., additional, Sumachev, V., additional, Szczepanek, T., additional, Walther, D., additional, and Weinheimer, Chr., additional

Published
2008
Full Text
View/download PDF

23. Neutral-PionPhotoproduction off Protons in the Energy Range0.3GeV<Eγ<3GeV

Author

Bartholomy, O., primary, Credé, V., additional, van Pee, H., additional, Anisovich, A.  V., additional, Anton, G., additional, Bantes, R., additional, Beloglazov, Yu., additional, Bogendörfer, R., additional, Castelijns, R., additional, Ehmanns, A., additional, Ernst, J., additional, Fabry, I., additional, Flemming, H., additional, Fösel, A., additional, Freiesleben, H., additional, Fuchs, M., additional, Funke, Ch., additional, Gothe, R., additional, Gridnev, A., additional, Gutz, E., additional, Höffgen, S.  K., additional, Horn, I., additional, Hößl, J., additional, Joosten, R., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Klein, F., additional, Klempt, E., additional, Koch, H., additional, Konrad, M., additional, Kopf, B., additional, Krusche, B., additional, Langheinrich, J., additional, Löhner, H., additional, Lopatin, I., additional, Lotz, J., additional, Matthäy, H., additional, Menze, D., additional, Messchendorp, J., additional, Morales, C., additional, Novinski, D., additional, Ostrick, M., additional, Radkov, A., additional, Reinnarth, J., additional, Sarantsev, A.  V., additional, Schadmand, S., additional, Schmidt, Ch., additional, Schmieden, H., additional, Schoch, B., additional, Suft, G., additional, Sumachev, V., additional, Szczepanek, T., additional, Thoma, U., additional, Walther, D., additional, and Weinheimer, Ch., additional

Published
2005
Full Text
View/download PDF

24. PhotoproductionofηMesonsoff Protons for0.75GeV<Eγ<3GeV

Author

Credé, V., primary, Bartholomy, O., additional, Anisovich, A.  V., additional, Anton, G., additional, Bantes, R., additional, Beloglazov, Yu., additional, Bogendörfer, R., additional, Castelijns, R., additional, Ehmanns, A., additional, Ernst, J., additional, Fabry, I., additional, Flemming, H., additional, Fösel, A., additional, Freiesleben, H., additional, Fuchs, M., additional, Funke, Ch., additional, Gothe, R., additional, Gridnev, A., additional, Gutz, E., additional, Höffgen, S.  K., additional, Horn, I., additional, Hößl, J., additional, Joosten, R., additional, Junkersfeld, J., additional, Kalinowsky, H., additional, Klein, F., additional, Klempt, E., additional, Koch, H., additional, Konrad, M., additional, Kopf, B., additional, Krusche, B., additional, Langheinrich, J., additional, Löhner, H., additional, Lopatin, I., additional, Lotz, J., additional, Matthäy, H., additional, Menze, D., additional, Messchendorp, J., additional, Morales, C., additional, Novinski, D., additional, Ostrick, M., additional, van Pee, H., additional, Radkov, A., additional, Reinnarth, J., additional, Sarantsev, A.  V., additional, Schadmand, S., additional, Schmidt, Ch., additional, Schmieden, H., additional, Schoch, B., additional, Suft, G., additional, Sumachev, V., additional, Szczepanek, T., additional, Thoma, U., additional, Walther, D., additional, and Weinheimer, Ch., additional

Published
2005
Full Text
View/download PDF

25. Study of the reaction γp → pπ0η.

Author

Horn, I., Anisovich, A., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Y., Bogendörfer, R., Castelijns, R., Credé, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Fösel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., and Gutz, E.

Subjects
PHOTON beams, ELECTRONS, PARTICLES (Nuclear physics), RESONANCE, PARTICLE beams, PHYSICS
Abstract

The reaction γ p → pπ0η has been studied with the CBELSA detector at the tagged photon beam of the Bonn electron stretcher facility. The reaction shows contributions from Δ+(1232)η , N(1535)+π0 and pa 0(980) as intermediate states. A partial-wave analysis suggests that the reaction proceeds via formation of six Δ -resonances, Δ(1600) P 33 , Δ(1920) P 33 , Δ(1700) D 33 , Δ(1940) D 33 , Δ(1905) F 35 , Δ(2360) D 33 , and two nucleon resonances N(1880) P 11 and N(2200) P 13 , for which pole positions and decay branching ratios are given. [ABSTRACT FROM AUTHOR]

Published
2008
Full Text
View/download PDF

26. Photoproduction of π 0 ω off protons for E γ ≤3 GeV.

Author

Junkersfeld, J., Anisovich, A., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Yu., Bogendörfer, R., Castelijns, R., Crede, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Fösel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., and Gutz, E.

Subjects
PARTICLES (Nuclear physics), ELECTRON accelerators, ELECTRONS, ATOMS, IONS
Abstract

Differential and total cross-sections for photoproduction of γp→ pπ 0 ω and γp→ Δ + ω were determined from measurements of the CB-ELSA experiment, performed at the electron accelerator ELSA in Bonn. The measurements covered the photon energy range from the production threshold up to 3GeV. [ABSTRACT FROM AUTHOR]

Published
2007
Full Text
View/download PDF

27. Photoproduction of πmesons off protons from the Δ(1232) region to Eγ = 3 GeV.

Author

van Pee, H., Bartholomy, O., Crede, V., Anisovich, A., Anton, G., Bantes, R., Beloglazov, Yu., Bogendörfer, R., Castelijns, R., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Fösel, A., Fuchs, M., Funke, Ch., Gothe, R., Gridnev, A., Gutz, E., and Höffgen, St.

Subjects
HEAVY particles (Nuclear physics), MESONS, CRYSTAL detectors, BARYON resonance, NUCLEAR magnetic resonance, PROTON magnetic resonance
Abstract

Photoproduction of π0-mesons was studied with the Crystal-Barrel detector at ELSA for incident energies from 300MeV to 3GeV. Differential cross-sections dσ/ dΩ, dσ/ dt, and the total cross-section are presented. For E γ < 3GeV, the angular distributions agree well with the SAID parametrization. At photon energies above 1.5GeV, a strong forward peaking indicates t-channel exchange to be the dominant process. The rapid variations of the cross-section with energy and angle indicate production of resonances. An interpretation of the data within the Bonn-Gatchina partial-wave analysis is briefly discussed. [ABSTRACT FROM AUTHOR]

Published
2007
Full Text
View/download PDF

28. New results on the Roper resonance and the partial wave

Author

Sarantsev, A.V., Fuchs, M., Kotulla, M., Thoma, U., Ahrens, J., Annand, J.R.M., Anisovich, A.V., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Yu., Castelijns, R., Crede, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Fösel, A., and Funke, Chr.

Subjects
*RESONANCE, *STRENGTH of materials, *EINSTEIN-Podolsky-Rosen experiment, *STRAINS & stresses (Mechanics)
Abstract

Abstract: Properties of the Roper resonance, the first scalar excitation of the nucleon, are determined. Pole positions and residues of the partial wave are studied in a combined analysis of pion- and photo-induced reactions. We find the Roper pole at and an elasticity of . The largest decay coupling is found for the Nσ (-S-wave). The analysis is based on new data on for photons in the energy range from the two-pion threshold to 820 MeV from TAPS at Mainz and from 0.4 to 1.3 GeV from Crystal Barrel at Bonn and includes further data from other experiments. The partial wave analysis excludes the possibility that the Roper resonance is split into two states with different partial decay widths. [Copyright &y& Elsevier]

Published
2008
Full Text
View/download PDF

29. and decays into

Author

Thoma, U., Fuchs, M., Anisovich, A.V., Anton, G., Bantes, R., Bartholomy, O., Beck, R., Beloglazov, Yu., Crede, V., Ehmanns, A., Ernst, J., Fabry, I., Flemming, H., Fösel, A., Funke, Chr., Gothe, R., Gridnev, A., Gutz, E., Höffgen, St., and Horn, I.

Subjects
*RESONANCE, *BARYONS, *PARTICLES (Nuclear physics), *NUCLEAR magnetic resonance
Abstract

Abstract: Decays of baryon resonances in the second and the third resonance region into are studied by photoproduction of two neutral pions off protons. Partial decay widths of and resonances decaying into , , , and are determined in a partial wave analysis of this data and of data from other reactions. Several partial decay widths were not known before. Interesting decay patterns are observed which are not even qualitatively reproduced by quark model calculations. In the second resonance region, decays into dominate clearly. The -wave provides a significant contribution to the cross section, especially in the third resonance region. The (1720) properties found here are at clear variance to PDG values. [Copyright &y& Elsevier]

Published
2008
Full Text
View/download PDF

30. Evidence for a parity doublet Delta(1920)P33 and Delta(1940)D33 from gammap-->ppi;{0}eta.

Author

Horn I, Anisovich AV, Anton G, Bantes R, Bartholomy O, Beck R, Beloglazov Y, Bogendörfer R, Castelijns R, Crede V, Ehmanns A, Ernst J, Fabry I, Flemming H, Fösel A, Fuchs M, Funke C, Gothe R, Gridnev A, Gutz E, Höffgen S, Hössl J, Junkersfeld J, Kalinowsky H, Klein F, Klempt E, Koch H, Konrad M, Kopf B, Krusche B, Langheinrich J, Löhner H, Lopatin I, Lotz J, Matthäy H, Menze D, Messchendorp J, Metag V, Nikonov VA, Novinski D, Ostrick M, van Pee H, Sarantsev AV, Schmidt C, Schmieden H, Schoch B, Suft G, Sumachev V, Szczepanek T, Thoma U, Walther D, and Weinheimer C

Abstract

Evidence is reported for the existence of a parity doublet of Delta resonances with total angular momentum J=3/2 from photoproduction of the ppi;{0}eta final state. The two parity partners Delta(1920)P33 and Delta(1940)D33 make significant contributions to the reaction. Cascades of resonances into Delta(1232)eta, N(1535)pi, and Na0(980) are clearly observed.

Published
2008
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results