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1. Measurement of the EMC effect in light and heavy nuclei

Author

Arrington, J., Bane, J., Daniel, A., Fomin, N., Gaskell, D., Seely, J., Asaturyan, R., Benmokhtar, F., Boeglin, W., Bosted, P., Bukhari, M. H. S., Christy, M. E., Connell, S., Dalton, M. M., Day, D., Dunne, J., Dutta, D., Fassi, L. El, Ent, R., Fenker, H., Gao, H., Holt, R. J., Horn, T., Hungerford, E., Jones, M. K., Jourdan, J., Kalantarians, N., Keppel, C. E., Kiselev, D., Lung, A. F., Malace, S., Meekins, D. G., Mertens, T., Mkrtchyan, H., Niculescu, G., Niculescu, I., Potterveld, D. H., Perdrisat, C., Punjabi, V., Qian, X., Reimer, P. E., Roche, J., Rodriguez, V. M., Rondon, O., Schulte, E., Slifer, K., Smith, G. R., Solvignon, P., Tadevosyan, V., Tang, L., Testa, G., Trojer, R., Tvaskis, V., Wesselmann, F. R., Wood, S. A., Yuan, L., and Zheng, X.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

Inclusive electron scattering from nuclear targets has been measured to extract the nuclear dependence of the inelastic cross section in Hall C at the Thomas Jefferson National Accelerator facility. Results are presented for 2H, 3He, 4He, 9B, 12C, 63Cu and 197Au at an incident electron beam energy of 5.77 GeV for a range of momentum transfer from Q^2 = 2 to 7 (GeV/c)^2. These data improve the precision of the existing measurements of the EMC effect in the nuclear targets at large x, and allow for more detailed examinations of the A dependence of the EMC effect., Comment: 28 pages, 23 figures, archival paper for Jefferson Lab experiment E03-103

Published
2021
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2. Measurement of the EMC effect in light and heavy nuclei

Author

Arrington, J, Bane, J, Daniel, A, Fomin, N, Gaskell, D, Seely, J, Asaturyan, R, Benmokhtar, F, Boeglin, W, Bosted, P, Bukhari, MHS, Christy, ME, Connell, S, Dalton, MM, Day, D, Dunne, J, Dutta, D, Fassi, L El, Ent, R, Fenker, H, Gao, H, Holt, RJ, Horn, T, Hungerford, E, Jones, MK, Jourdan, J, Kalantarians, N, Keppel, CE, Kiselev, D, Lung, AF, Malace, S, Meekins, DG, Mertens, T, Mkrtchyan, H, Niculescu, G, Niculescu, I, Potterveld, DH, Perdrisat, C, Punjabi, V, Qian, X, Reimer, PE, Roche, J, Rodriguez, VM, Rondon, O, Schulte, E, Slifer, K, Smith, GR, Solvignon, P, Tadevosyan, V, Tang, L, Testa, G, Trojer, R, Tvaskis, V, Wesselmann, FR, Wood, SA, Yuan, L, and Zheng, X

Subjects
Nuclear and Plasma Physics, Synchrotrons and Accelerators, Physical Sciences, Nuclear and plasma physics
Abstract

Inclusive electron scattering from nuclear targets has been measured to extract the nuclear dependence of the inelastic cross section (σA) in Hall C at the Thomas Jefferson National Accelerator facility. Results are presented for H2, He3, He4, B9, C12, Cu63, and Au197 at an incident electron beam energy of 5.77 GeV for a range of momentum transfer from Q2 = 2 to 7 (GeV/c)2. These data improve the precision of the existing measurements of the EMC effect in the nuclear targets at large x and allow for more detailed examinations of the A dependence of the EMC effect.

Published
2021

4. Neurophysiological and Autonomic Dynamics of Threat Processing during Sustained Social Fear Generalization.

Author

Pouliot, Jourdan J., Ward, Richard T., Traiser, Caitlin M., Chiasson, Payton, Gilbert, Faith E., and Keil, Andreas

Subjects
*VISUAL evoked potentials, *PUPILLARY reflex, *VISUAL cortex, *CLASSROOM environment, *GENERALIZATION
Abstract

Survival in dynamic environments requires that organisms learn to predict danger from situational cues. One key facet of threat prediction is generalization from a predictive cue to similar cues, ensuring that a cue-outcome contingency is applied beyond the original learning environment. Generalization has been observed in laboratory studies of aversive conditioning: Behavioral and physiological processes generalize responses from a stimulus paired with threat (the conditioned stimulus [CS+]) to unpaired stimuli, with response magnitudes varying with CS+ similarity. In contrast, work focusing on sensory responses in visual cortex has found a sharpening pattern, in which responses to stimuli closely resembling the CS+ are maximally suppressed, potentially reflecting lateral inhibitory interactions with the CS+ representation. Originally demonstrated with simple visual cues, changes in visuocortical tuning have also been observed in threat generalization learning across facial identities. It is unclear to what extent these visuocortical changes represent transient or sustained effects and if generalization learning requires prior conditioning to the CS+. The present study addressed these questions using EEG and pupillometry in an aversive generalization paradigm involving hundreds of trials using a gradient of facial identities. Visuocortical steady-state visual evoked potential sharpening occurred after dozens of trials of generalization learning without prior differential conditioning, but diminished as learning continued. By contrast, generalization of alpha power suppression, pupil dilation, and self-reported valence and arousal was seen throughout the experiment. Findings are consistent with threat processing models emphasizing the role of changing visucocortical and attentional dynamics when forming, curating, and shaping fear memories as observers continue learning about stimulus-outcome contingencies. [ABSTRACT FROM AUTHOR]

Published
2025
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5. One like all? Behavioral response range of native and invasive amphipods to neonicotinoid exposure

Author

Soose, L.J., Rex, T., Oehlmann, J., Schiwy, A., Krauss, Martin, Brack, Werner, Klimpel, S., Hollert, H., Jourdan, J., Soose, L.J., Rex, T., Oehlmann, J., Schiwy, A., Krauss, Martin, Brack, Werner, Klimpel, S., Hollert, H., and Jourdan, J.

Abstract

Native and invasive species often occupy similar ecological niches and environments where they face comparable risks from chemical exposure. Sometimes, invasive species are phylogenetically related to native species, e.g. they may come from the same family and have potentially similar sensitivities to environmental stressors due to phylogenetic conservatism and ecological similarity. However, empirical studies that aim to understand the nuanced impacts of chemicals on the full range of closely related species are rare, yet they would help to comprehend patterns of current biodiversity loss and species turnover. Behavioral sublethal endpoints are of increasing ecotoxicological interest. Therefore, we investigated behavioral responses (i.e., change in movement behavior) of the four dominant amphipod species in the Rhine-Main area (central Germany) when exposed to the neonicotinoid thiacloprid. Moreover, beyond species-specific behavioral responses, ecological interactions (e.g. parasitation with Acanthocephala) play a crucial role in shaping behavior, and we have considered these infections in our analysis. Our findings revealed distinct baseline behaviors and species-specific responses to thiacloprid exposure. Notably, Gammarus fossarum exhibited biphasic behavioral changes with hyperactivity at low concentrations that decreased at higher concentrations. Whereas Gammarus pulex, Gammarus roeselii and the invasive species Dikerogammarus villosus, showed no or weaker behavioral responses. This may partly explain why G. fossarum disappears in chemically polluted regions while the other species persist there to a certain degree. But it also shows that potential pre-exposure in the habitat may influence behavioral responses of the other amphipod species, because habituation occurs, and potential hyperactivity would be harmful to individuals in the habitat. The observed responses were further influenced by acanthocephalan parasites, which altered baseline behavior in G. roe

Published
2024

8. New measurements of high-momentum nucleons and short-range structures in nuclei

Author

Fomin, N., Arrington, J., Asaturyan, R., Benmokhtar, F., Boeglin, W., Bosted, P., Bruell, A., Bukhari, M. H. S., Chudakov, E., Clasie, B., Connell, S. H., Dalton, M. M., Daniel, A., Day, D. B., Dutta, D., Ent, R., Fassi, L. El, Fenker, H., Filippone, B. W., Garrow, K., Gaskell, D., Hill, C., Holt, R. J., Horn, T., Jones, M. K., Jourdan, J., Kalantarians, N., Keppel, C. E., Kiselev, D., Kotulla, M., Lindgren, R., Lung, A. F., Malace, S., Markowitz, P., McKee, P., Meekins, D. G., Mkrtchyan, H., Navasardyan, T., Niculescu, G., Opper, A. K., Perdrisat, C., Potterveld, D. H., Punjabi, V., Qian, X., Reimer, P. E., Roche, J., Rodriguez, V. M., Rondon, O., Schulte, E., Seely, J., Segbefia, E., Slifer, K., Smith, G. R., Solvignon, P., Tadevosyan, V., Tajima, S., Tang, L., Testa, G., Trojer, R., Tvaskis, V., Vulcan, W. F., Wasko, C., Wesselmann, F. R., Wood, S. A., Wright, J., and Zheng, X.

Subjects
Nuclear Experiment
Abstract

We present new measurements of electron scattering from high-momentum nucleons in nuclei. These data allow an improved determination of the strength of two-nucleon correlations for several nuclei, including light nuclei where clustering effects can, for the first time, be examined. The data also include the kinematic region where three-nucleon correlations are expected to dominate., Comment: 5 pages, 3 figures. Results from JLab E02-019

Published
2011
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9. Scaling of the F_2 structure function in nuclei and quark distributions at x>1

Author

Fomin, N., Arrington, J., Day, D. B., Gaskell, D., Daniel, A., Seely, J., Asaturyan, R., Benmokhtar, F., Boeglin, W., Boillat, B., Bosted, P., Bruell, A., Bukhari, M. H. S., Christy, M. E., Chudakov, E., Clasie, B., Connell, S. H., Dalton, M. M., Dutta, D., Ent, R., Fassi, L. El, Fenker, H., Filippone, B. W., Garrow, K., Hill, C., Holt, R. J., Horn, T., Jones, M. K., Jourdan, J., Kalantarians, N., Keppel, C. E., Kiselev, D., Kotulla, M., Lindgren, R., Lung, A. F., Malace, S., Markowitz, P., McKee, P., Meekins, D. G., Miyoshi, T., Mkrtchyan, H., Navasardyan, T., Niculescu, G., Okayasu, Y., Opper, A. K., Perdrisat, C., Potterveld, D. H., Punjabi, V., Qian, X., Reimer, P. E., Roche, J., Rodriguez, V. M., Rondon, O., Schulte, E., Segbefia, E., Slifer, K., Smith, G. R., Solvignon, P., Tadevosyan, V., Tajima, S., Tang, L., Testa, G., Trojer, R., Tvaskis, V., Vulcan, W. F., Wasko, C., Wesselmann, F. R., Wood, S. A., Wright, J., and Zheng, X.

Subjects
Nuclear Experiment
Abstract

We present new data on electron scattering from a range of nuclei taken in Hall C at Jefferson Lab. For heavy nuclei, we observe a rapid falloff in the cross section for $x>1$, which is sensitive to short range contributions to the nuclear wave-function, and in deep inelastic scattering corresponds to probing extremely high momentum quarks. This result agrees with higher energy muon scattering measurements, but is in sharp contrast to neutrino scattering measurements which suggested a dramatic enhancement in the distribution of the `super-fast' quarks probed at x>1. The falloff at x>1 is noticeably stronger in ^2H and ^3He, but nearly identical for all heavier nuclei., Comment: 5 pages, 4 figures, to be submitted to physical review

Published
2010
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10. New measurements of the EMC effect in very light nuclei

Author

Seely, J., Daniel, A., Gaskell, D., Arrington, J., Fomin, N., Solvignon, P., Asaturyan, R., Benmokhtar, F., Boeglin, W., Boillat, B., Bosted, P., Bruell, A., Bukhari, M. H. S., Christy, M. E., Clasie, B., Connell, S., Dalton, M., Day, D., Dunne, J., Dutta, D., Fassi, L. El, Ent, R., Fenker, H., Filippone, B. W., Gao, H., Hill, C., Holt, R. J., Horn, T., Hungerford, E., Jones, M. K., Jourdan, J., Kalantarians, N., Keppel, C. E., Kiselev, D., Kotulla, M., Lee, C., Lung, A. F., Malace, S., Meekins, D. G., Mertens, T., Mkrtchyan, H., Navasardyan, T., Niculescu, G., Niculescu, I., Nomura, H., Okayasu, Y., Opper, A. K., Perdrisat, C., Potterveld, D. H., Punjabi, V., Qian, X., Reimer, P. E., Roche, J., Rodriguez, V. M., Rondon, O., Schulte, E., Segbefia, E., Slifer, K., Smith, G. R., Tadevosyan, V., Tajima, S., Tang, L., Testa, G., Trojer, R., Tvaskis, V., Vulcan, W. F., Wesselmann, F. R., Wood, S. A., Wright, J., Yuan, L., and Zheng, X.

Subjects
Nuclear Experiment, High Energy Physics - Phenomenology
Abstract

New Jefferson Lab data are presented on the nuclear dependence of the inclusive cross section from 2H, 3He, 4He, 9Be and 12C for 0.3

Published
2009
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11. Probing Quark-Gluon Interactions with Transverse Polarized Scattering

Author

Slifer, K., Rondon, O. A., Aghalaryan, A., Ahmidouch, A., Asaturyan, R., Bloch, F., Boeglin, W., Bosted, P., Carasco, C., Carlini, R., Cha, J., Chen, J. P., Christy, M. E., Cole, L., Coman, L., Crabb, D., Danagoulian, S., Day, D., Dunne, J., Elaasar, M., Ent, R., Fenker, H., Frlez, E., Gaskell, D., Gan, L., Gomez, J., Hu, B., Jourdan, J., Jones, M. K., Keith, C., Keppel, C. E., Khandaker, M., Klein, A., Kramer, L., Liang, Y., Lichtenstadt, J., Lindgren, R., Mack, D., McKee, P., McNulty, D., Meekins, D., Mkrtchyan, H., Nasseripour, R., Niculescu, I., Normand, K., Norum, B., Pocanic, D., Prok, Y., Raue, B., Reinhold, J., Roche, J., Kiselev, D., Savvinov, N., Sawatzky, B., Seely, M., Sick, I., Smith, C., Smith, G., Stepanyan, S., Tang, L., Tajima, S., Testa, G., Vulcan, W., Wang, K., Warren, G., Wesselmann, F. R., Wood, S., Yan, C., Yuan, L., Yun, J., Zeier, M., and Zhu, H.

Subjects
Nuclear Experiment
Abstract

We have extracted QCD matrix elements from our data on double polarized inelastic scattering of electrons on nuclei. We find the higher twist matrix element \tilde{d_2}, which arises strictly from quark- gluon interactions, to be unambiguously non zero. The data also reveal an isospin dependence of higher twist effects if we assume that the Burkhardt-Cottingham Sum rule is valid. The fundamental Bjorken sum rule obtained from the a0 matrix element is satisfied at our low momentum transfer., Comment: formerly "Nachtmann Moments of the Proton and Deuteron Spin Structure Functions"

Published
2008
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12. The f_LT Response Function of D(e,e'p)n at Q^2=0.33(GeV/c)^2

Author

Boeglin, W. U., Arenhövel, H., Blomqvist, K. I., Böhm, R., Distler, M., Edelhoff, R., Ewald, I., Florizone, R., Friedrich, J., Geiges, R., Jourdan, J., Kahrau, M., Korn, M., Kramer, H., Krygier, K. W., Kunde, V., Kuss, M., Liesenfeld, A., Merle, K., Neuhausen, R., Offermann, E. A. J. M., Pospischil, Th., Potokar, M., Richter, A. W., Rokavec, A., Rosner, G., Sauer, P., Sick, I., Schardt, S. Sirca S., Serdarevic, A., Vodenik, B., Wagner, A., Walcher, Th., and Wolf, S.

Subjects
Nuclear Experiment
Abstract

The interference response function f_LT (R_LT) of the D(e,e'p)n reaction has been determined at squared four-momentum transfer Q^2 = 0.33 (GeV/c)^2 and for missing momenta up to p_miss= 0.29 (GeV/c). The results have been compared to calculations that reproduce f_LT quite well but overestimate the cross sections by 10 - 20% for missing momenta between 0.1 (GeV/c) and 0.2 (GeV/c) ., Comment: 12 Pages, 10 figures

Published
2008
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13. Proton Spin Structure in the Resonance Region

Author

RSS Collaboration, Wesselmann, F. R., Slifer, K., Tajima, S., Aghalaryan, A., Ahmidouch, A., Asaturyan, R., Bloch, F., Boeglin, W., Bosted, P., Carasco, C., Carlini, R., Cha, J., Chen, J. P., Christy, M. E., Cole, L., Coman, L., Crabb, D., Danagoulian, S., Day, D., Dunne, J., Elaasar, M., Ent, R., Fenker, H., Frlez, E., Gan, L., Gaskell, D., Gomez, J., Hu, B., Jones, M. K., Jourdan, J., Keith, C., Keppel, C. E., Khandaker, M., Klein, A., Kramer, L., Liang, Y., Lichtenstadt, J., Lindgren, R., Mack, D., McKee, P., McNulty, D., Meekins, D., Mkrtchyan, H., Nasseripour, R., Niculescu, I., Normand, K., Norum, B., Pocanic, D., Prok, Y., Raue, B., Reinhold, J., Roche, J., Rohe, D., Rondon, O. A., Savvinov, N., Sawatzky, B., Seely, M., Sick, I., Smith, C., Smith, G., Stepanyan, S., Tang, L., Testa, G., Vulcan, W., Wang, K., Warren, G., Wood, S., Yan, C., Yuan, L., Yun, J., Zeier, M., and Zhu, H.

Subjects
Nuclear Experiment, High Energy Physics - Phenomenology
Abstract

We have examined the spin structure of the proton in the region of the nucleon resonances (1.085 GeV < W < 1.910 GeV) at an average four momentum transfer of Q^2 = 1.3 GeV^2. Using the Jefferson Lab polarized electron beam, a spectrometer, and a polarized solid target, we measured the asymmetries A_parallel and A_perp to high precision, and extracted the asymmetries A_1 and A_2, and the spin structure functions g_1 and g_2. We found a notably non-zero A_perp, significant contributions from higher-twist effects, and only weak support for polarized quark--hadron duality., Comment: 6 pages, 4 figures, REVTeX4, similar to PRL submission, plots colorized and appenix added, v3: minor edit, matches PRL

Published
2006
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14. Vector and Tensor Analyzing Powers of the H(d,gamma)He-3 capture reaction

Author

Klechneva, T., Carasco, C., Goussev, I., Hauger, M., Jourdan, J., Krusche, B., Muehry, H., Normand, Ch., Rohe, D., Seliverstov, D., Sick, I., Testa, G., Warren, G., Woehrle, H., and Zeier, M.

Subjects
Nuclear Experiment
Abstract

Precise measurements of the deuteron vector analyzing power Ayd and the tensor analyzing power Ayy of the H(d,gamma)He-3 capture reaction have been performed at deuteron energies of 29MeV and 45MeV. The data have been compared to theoretical state-of-the-art calculations available today. Due to the large sensitivity of polarization observables and the precision of the data light could be shed on small effects present in the dynamics of the reaction., Comment: 11 pages, 24 figures, submitted for publication to PRC, revised after referee process

Published
2005
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15. Nuclear transparency from quasielastic 12C(e,e'p)

Author

Rohe, D., Benhar, O., Armstrong, C. S., Asaturyan, R., Baker, O. K., Bueltmann, S., Carasco, C., Day, D., Ent, R., Fenker, H. C., Garrow, K., Gasparian, A., Gueye, P., Hauger, M., Honegger, A., Jourdan, J., Keppel, C. E., Kubon, G., Lindgren, R., Lung, A., Mack, D. J., Mitchell, J. H., Mkrtchyan, H., Mocelj, D., Normand, K., Petitjean, T., Rondon, O., Segbefia, E., Sick, I., Stepanyan, S., Tang, L., Tiefenbacher, F., Vulcan, W. F., Warren, G., Wood, S. A., Yuan, L., Zeier, M., Zhu, H., and Zihlmann, B.

Subjects
Nuclear Experiment
Abstract

We studied the reaction 12C(e,e'p) in quasielastic kinematics at momentum transfers between 0.6 and 1.8 (GeV/c)^2 covering the single-particle region. From this the nuclear transparency factors are extracted using two methods. The results are compared to theoretical predictions obtained using a generalization of Glauber theory described in this paper. Furthermore, the momentum distribution in the region of the 1s-state up to momenta of 300 MeV/c is obtained from the data and compared to the Correlated Basis Function theory and the Independent-Particle Shell model., Comment: accepted by Phys. Rev. C

Published
2005
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16. Measurement of the asymmetries in 3He(e,e'p)d and 3He(e,e'p)np

Author

Achenbach, P., Baumann, D., Boehm, R., Boillat, B., Bosnar, D., Carasco, C., Ding, M., Distler, M. O., Friedrich, J., Gloeckle, W., Golak, J., Goussev, Y., Grabmayr, P., Heil, W., Huegli, A., Jennewein, P., Manas, G. Jover, Jourdan, J., Kamada, H., Klechneva, T., Krusche, B., Krygier, K. W., Llongo, J. G., Lloyd, M., Makek, M., Merkel, H., Micheli, C., Mueller, U., Nogga, A., Neuhausen, R., Normand, Ch., Nungesser, L., Ott, A., Otten, E., Parpan, F., Benito, R. Perez, Potokar, M., Rohe, D., Rudersdorf, D., Schmiedeskamp, J., Seimetz, M., Sick, I., Sirca, S., Skibinski, R., Stave, S., Testa, G., Trojer, R., Walcher, Th., Weis, M., Witala, H., and Woehrle, H.

Subjects
Nuclear Experiment
Abstract

The electron-target-asymmetries A_parallel and A_perpendicular with target spin parallel and perpendicular to the momentum transfer q were measured for both the two-- and three-body breakup of 3He in the 3He(e,e'p)-reaction. Polarized electrons were scattered off polarized 3He in the quasielastic regime in parallel kinematics with the scattered electron and the knocked-out proton detected using the Three-Spectrometer-Facility at MAMI. The results are compared to Faddeev calculations which take into account Final State Interactions as well as Meson Exchange Currents. The experiment confirms the prediction of a large effect of Final State Interactions in the asymmetry of the three-body breakup and of an almost negligible one for the two-body breakup., Comment: accepted by Eur. Phys. Journal A

Published
2005
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18. Correlated Strength in Nuclear Spectral Function

Author

Rohe, D., Armstrong, C. S., Asaturyan, R., Baker, O. K., Bueltmann, S., Carasco, C., Day, D., Ent, R., Fenker, H. C., Garrow, K., Gasparian, A., Gueye, P., Hauger, M., Honegger, A., Jourdan, J., Keppel, C. E., Kubon, G., Lindgren, R., Lung, A., Mack, D. J., Mitchell, J. H., Mkrtchyan, H., Mocelj, D., Normand, K., Petitjean, T., Rondon, O., Segbefia, E., Sick, I., Stepanyan, S., Tang, L., Tiefenbacher, F., Vulcan, W. F., Warren, G., Wood, S. A., Yuan, L., Zeier, M., Zhu, H., and Zihlmann, B.

Subjects
Nuclear Experiment
Abstract

We have carried out an (e,e'p) experiment at high momentum transfer and in parallel kinematics to measure the strength of the nuclear spectral function S(k,E) at high nucleon momenta k and large removal energies E. This strength is related to the presence of short-range and tensor correlations, and was known hitherto only indirectly and with considerable uncertainty from the lack of strength in the independent-particle region. This experiment confirms by direct measurement the correlated strength predicted by theory., Comment: 4 pages, 2 figures, accepted by Phys. Rev. Lett

Published
2004
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19. The neutron charge form factor and target analyzing powers from pol.3He(pol e,e'n)-scattering

Author

Bermuth, J., Merle, P., Carasco, C. C., Baumann, D., Boehm, R., Bosnar, D., Ding, M., Distler, M. O., Friedrich, J., Friedrich, J. M, Golak, J., Gloeckle, W., Hauger, M., Heil, W., Jennewein, P., Jourdan, J., Kamada, H., Klein, A., Kohl, M., Krusche, B., Krygier, K. W., Merkel, H., Mueller, U., Neuhausen, R., Nogga, A., Normand, Ch., Otten, E., Pospischil, Th., Potokar, M., Rohe, D., Schmieden, H., Schmiedeskamp, J., Seimetz, M., Sick, I., Sirca, S., Skibinski, S., Testa, G., Walcher, Th., Warren, G., Weis, M., Witala, H., Woehrle, H., and Zeier, M.

Subjects
Nuclear Experiment
Abstract

The charge form factor of the neutron has been determined from asymmetries measured in quasi--elastic pol.3He(pol e,e'n) at a momentum transfer of 0.67(GeV/c)^2. In addition, the target analyzing power, A_y^o, has been measured to study effects of final state interactions and meson exchange currents., Comment: 10 pages, 1 figure

Published
2003
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20. Final State Interaction Effects in pol 3He(pol e,e'p)

Author

Carasco, C., Bermuth, J., Merle, P., Bartsch, P., Baumann, D., Boehm, R., Bosnar, D., Ding, M., Distler, M. O., Friedrich, J., Friedrich, J. M., Golak, J., Gloeckle, W., Hauger, M., Heil, W., Jennewein, P., Jourdan, J., Kamada, H., Klein, A., Kohl, M., Krygier, K. W., Merkel, H., Mueller, U., Neuhausen, R., Nogga, A., Normand, Ch., Otten, E., Pospischil, Th., Potokar, M., Rohe, D., Schmieden, H., Schmiedeskamp, J., Seimetz, M., Sick, I., Sirca, S., Skibinski, R., Testa, G., Walcher, Th., Warren, G., Weis, M., Witala, H., Woehrle, H., and Zeier, M.

Subjects
Nuclear Experiment
Abstract

Asymmetries in quasi-elastic pol 3He(pol e,e'p) have been measured at a momentum transfer of 0.67 (GeV/c)^2 and are compared to a calculation which takes into account relativistic kinematics in the final state and a relativistic one-body current operator. With an exact solution of the Faddeev equation for the 3He-ground state and an approximate treatment of final state interactions in the continuum good agreement is found with the experimental data., Comment: 11 pages, 6 figures, submitted to Phys. Lett. B, revised version, sensitivity study to relativity and NN-potential added

Published
2003
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21. Precise Neutron Magnetic Form Factors

Author

Kubon, G., Anklin, H., Bartsch, P., Baumann, D., Boeglin, W. U., Bohinc, K., Boehm, R., Carasco, C., Distler, M. O., Ewald, I., Friedrich, J., Friedrich, J. M, Hauger, M., Honegger, A., Jennewein, P., Jourdan, J., Kahrau, M., Krygier, K. W., Liesenfeld, A., Merkel, H., Mueller, U., Neuhausen, R., Normand, Ch., Petitjean, Th., Pospischil, Th., Potokar, M., Rohe, D., Rosner, G., Schmieden, H., Sick, I., Sirca, S., Trueb, Ph., Wagner, A., Walcher, Th., Warren, G., Weis, M., Woehrle, H., Zhao, M. ZeierJ., and Zihlmann, B.

Subjects
Nuclear Experiment
Abstract

Precise data on the neutron magnetic form factor G_{mn} have been obtained with measurements of the ratio of cross sections of D(e,e'n) and D(e,e'p) up to momentum transfers of Q^2 = 0.9 (GeV/c)^2. Data with typical uncertainties of 1.5% are presented. These data allow for the first time to extract a precise value of the magnetic radius of the neutron., Comment: 10 pages, 2 figures, submitted to Physics Letters B

Published
2001
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22. Longitudinal and Transverse Quasi-Elastic Response Functions of Light Nuclei

Author

Carlson, J., Jourdan, J., Schiavilla, R., and Sick, I.

Subjects
Nuclear Theory
Abstract

The $^3$He and $^4$He longitudinal and transverse response functions are determined from an analysis of the world data on quasi-elastic inclusive electron scattering. The corresponding Euclidean response functions are derived and compared to those calculated with Green's function Monte Carlo methods, using realistic interactions and currents. Large contributions associated with two-body currents are found, particularly in the $^4$He transverse response, in agreement with data. The contributions of two-body charge and current operators in the $^3$He, $^4$He, and $^6$Li response functions are also studied via sum-rule techniques. A semi-quantitative explanation for the observed systematics in the excess of transverse quasi-elastic strength, as function of mass number and momentum transfer, is provided. Finally, a number of model studies with simplified interactions, currents, and wave functions is carried out to elucidate the role played, in the full calculation, by tensor interactions and correlations., Comment: 40 pages, 11 figures, submitted to Phys. Rev. C

Published
2001
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23. x- and xi-scaling of the Nuclear Structure Function at Large x

Author

Arrington, J., Armstrong, C. S., Averett, T., Baker, O. K., de Bever, L., Bochna, C. W., Boeglin, W., Bray, B., Carlini, R. D., Collins, G., Cothran, C., Crabb, D., Day, D., Dunne, J. A., Dutta, D., Ent, R., Filippone, B. W., Honegger, A., Hughes, E. W., Jensen, J., Jourdan, J., Keppel, C. E., Koltenuk, D. M., Lindgren, R., Lung, A., Mack, D. J, McCarthy, J., McKeown, R. D., Meekins, D., Mitchell, J. H., Mkrtchyan, H. G., Niculescu, G., Niculescu, I., Petitjean, T., Rondon, O., Sick, I., Smith, C., Terburg, B., Vulcan, W. F., Wood, S. A., Yan, C., Zhao, J., and Zihlmann, B.

Subjects
Nuclear Experiment
Abstract

Inclusive electron scattering data are presented for ^2H and Fe targets at an incident electron energy of 4.045 GeV for a range of momentum transfers from Q^2 = 1 to 7 (GeV/c)^2. Data were taken at Jefferson Laboratory for low values of energy loss, corresponding to values of Bjorken x greater than or near 1. The structure functions do not show scaling in x in this range, where inelastic scattering is not expected to dominate the cross section. The data do show scaling, however, in the Nachtmann variable \xi. This scaling may be the result of Bloom Gilman duality in the nucleon structure function combined with the Fermi motion of the nucleons in the nucleus. The resulting extension of scaling to larger values of \xi opens up the possibility of accessing nuclear structure functions in the high-x region at lower values of Q^2 than previously believed., Comment: RevTeX, 5 pages with 4 postscript figures, submitted to PRC

Published
2001
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25. Polarization transfer in the $^{4}$He$(\vec{e},e' \vec{p}^{3}$H reaction

Author

Dieterich, S., Bartsch, P., Baumann, D., Bermuth, J., Bohinc, K., Böhm, R., Bosnar, D., Derber, S., Ding, M., Distler, M., Ewald, I., Friedrich, J., Friedrich, J. M., Gilman, R., Glashausser, C., Hauger, M., Jennewein, P., Jourdan, J., Kelly, J. J., Kohl, M., Kozlov, A., Krygier, K. W., Kumbartzki, G., Lac, J., Liesenfeld, A., Merkel, H., Müller, U., Neuhausen, R., Pospischil, Th., Ransome, R. D., Rohe, D., Rosner, G., Schmieden, H., Seimetz, M., Sick, I., Strauch, S., Udias, J. M., Vignote, J. R., Wagner, A., Walcher, Th., Warren, G., and Weis, M.

Subjects
Nuclear Experiment
Abstract

Polarization transfer in the 4He(e,e'p)3H reaction at a Q^2 of 0.4 (GeV/c)^2 was measured at the Mainz Microtron MAMI. The ratio of the transverse to the longitudinal polarization components of the ejected protons was compared with the same ratio for elastic ep scattering. The results are consistent with a recent fully relativistic calculation which includes a predicted medium modification of the proton form factor based on a quark-meson coupling model., Comment: 5 pages, Latex, 2 postscript figures, submitted to Physics Letters B

Published
2000
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26. The focal plane proton-polarimeter for the 3-spectrometer setup at MAMI

Author

Pospischil, T., Bartsch, P., Baumann, D., Boehm, R., Bohinc, K., Clawiter, N., Ding, M., Derber, S., Distler, M., Elsner, D., Ewald, I., Friedrich, J., Friedrich, J. M., Geiges, R., Groezinger, S., Hamdorf, M., Hedicke, S., Jennewein, P., Jourdan, J., Kahrau, M., Klein, F., Koenig, P., Kozlov, A., Kramer, H., Krygier, K. W., Lac, J., Liesenfeld, A., Malov, S., McIntyre, J., Merkel, H., Merle, P., Mueller, U., Neuhausen, R., Offermann, E. A., Potokar, M., Ransome, R., Richter, A., Rosner, G., Sanner, J., Schmieden, H., Seimetz, M., Sick, I., Straehle, O., Suele, A., Wagner, A., Walcher, T., Warren, G. A., Weis, M., and Wu, X. Q.

Subjects
Nuclear Experiment
Abstract

For experiments of the type A(\vec e,e'\vec p) the 3-spectrometer setup of the A1 collaboration at MAMI has been supplemented by a focal plane proton-polarimeter. To this end, a carbon analyzer of variable thickness and two double-planes of horizontal drift chambers have been added to the standard detector system of Spectrometer A. Due to the spin precession in the spectrometer magnets, all three polarization components at the target can be measured simultaneously. The performance of the polarimeter has been studied using elastic p(e,e'p) scattering., Comment: 23 pages LaTeX, 13 ps figures

Published
2000
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27. A high-precision polarimeter

Author

Hauger, M., Honegger, A., Jourdan, J., Kubon, G., Petitjean, T., Rohe, D., Sick, I., Warren, G., Woehrle, H., Zhao, J., Ent, R., Mitchell, J., Crabb, D., Tobias, A., Zeier, M., and Zihlmann, B.

Subjects
Nuclear Experiment
Abstract

We have built a polarimeter in order to measure the electron beam polarization in hall C at JLAB. Using a superconducting solenoid to drive the pure-iron target foil into saturation, and a symmetrical setup to detect the Moller electrons in coincidence, we achieve an accuracy of <1%. This sets a new standard for Moller polarimeters., Comment: 17 pages, 9 figures, submitted to N.I.M

Published
1999
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28. Seasonal and spatial variation of stream macroinvertebrate taxonomic and functional diversity across three boreal regions

Author

Baker, N. J. (Nathan Jay), Welti, E. A. (Ellen A. R.), Pilotto, F. (Francesca), Jourdan, J. (Jonas), Beudert, B. (Burkhard), Huttunen, K.-L. (Kaisa-Leena), Muotka, T. (Timo), Paavola, R. (Riku), Göthe, E. (Emma), Haase, P. (Peter), Baker, N. J. (Nathan Jay), Welti, E. A. (Ellen A. R.), Pilotto, F. (Francesca), Jourdan, J. (Jonas), Beudert, B. (Burkhard), Huttunen, K.-L. (Kaisa-Leena), Muotka, T. (Timo), Paavola, R. (Riku), Göthe, E. (Emma), and Haase, P. (Peter)

Abstract

1. The exploration of biodiversity has predominantly been based on taxonomic measures, whereas functional diversity, a key component of biodiversity, is comparatively understudied. Therefore, studies simultaneously investigating patterns of taxonomic and functional diversity change in biological communities are of increasing interest. 2. We collated high-resolution macroinvertebrate and environmental data from 70 boreal headwater stream sites across three European countries (Germany, Finland, Sweden) to (1) investigate seasonal variation in taxonomic diversity, functional diversity, and redundancy, and (2) identify their potential drivers of spatial and seasonal variation. 3. Seasonal changes in boreal macroinvertebrate taxonomic diversity were decoupled from changes in functional diversity. Seasonal shifts in environmental conditions, including acidity and nutrient variability, drove fluctuations in taxonomic diversity which were far more pronounced than those of functional diversity. 4. Seasonal shifts in environmental conditions including variation in the quantity, quality, and state of organic carbon (dissolved vs particulate) facilitate an exchange of taxa, leading to taxonomically unique communities that exploit the pool of available seasonal resources. Thus, similar levels of functional diversity across seasons—even as taxonomic diversity changes—suggest limited differences in interspecific changes in community function, potentially indicating functional resistance rooted in redundancy. 5. We highlight the spatial and seasonal discrepancies of freshwater communities, emphasising the need for both taxonomic and functional diversity patterns to be assessed in future biodiversity monitoring programmes.

Published
2023

29. Better integration of chemical pollution research will further our understanding of biodiversity loss

Author

Sylvester, F., Weichert, F.G., Lozano, V.L., Groh, K.J., Bálint, M., Baumann, L., Bässler, C., Brack, Werner, Brandl, B., Curtius, J., Dierkes, P., Döll, P., Ebersberger, I., Fragkostefanakis, S., Helfrich, E.J.N., Hickler, T., Johann, S., Jourdan, J., Klimpel, S., Kminek, H., Liquin, F., Möllendorf, D., Mueller, T., Oehlmann, J., Ottermanns, R., Pauls, S.U., Piepenbring, M., Pfefferle, J., Schenk, G.J., Scheepens, J.F., Scheringer, M., Schiwy, S., Schlottmann, A., Schneider, F., Schulte, L.M., Schulze-Sylvester, M., Stelzer, E., Strobl, F., Sundermann, A., Tockner, K., Tröger, T., Vilcinskas, A., Völker, C., Winkelmann, R., Hollert, H., Sylvester, F., Weichert, F.G., Lozano, V.L., Groh, K.J., Bálint, M., Baumann, L., Bässler, C., Brack, Werner, Brandl, B., Curtius, J., Dierkes, P., Döll, P., Ebersberger, I., Fragkostefanakis, S., Helfrich, E.J.N., Hickler, T., Johann, S., Jourdan, J., Klimpel, S., Kminek, H., Liquin, F., Möllendorf, D., Mueller, T., Oehlmann, J., Ottermanns, R., Pauls, S.U., Piepenbring, M., Pfefferle, J., Schenk, G.J., Scheepens, J.F., Scheringer, M., Schiwy, S., Schlottmann, A., Schneider, F., Schulte, L.M., Schulze-Sylvester, M., Stelzer, E., Strobl, F., Sundermann, A., Tockner, K., Tröger, T., Vilcinskas, A., Völker, C., Winkelmann, R., and Hollert, H.

Abstract

no abstract

Published
2023

37. The electron–ion scattering experiment ELISe at the International Facility for Antiproton and Ion Research (FAIR)—A conceptual design study

Author

Antonov, A.N., Gaidarov, M.K., Ivanov, M.V., Kadrev, D.N., Aïche, M., Barreau, G., Czajkowski, S., Jurado, B., Belier, G., Chatillon, A., Granier, T., Taieb, J., Doré, D., Letourneau, A., Ridikas, D., Dupont, E., Berthoumieux, E., Panebianco, S., Farget, F., Schmitt, C., Audouin, L., Khan, E., Tassan-Got, L., Aumann, T., Beller, P., Boretzky, K., Dolinskii, A., Egelhof, P., Emling, H., Franzke, B., Geissel, H., Kelic-Heil, A., Kester, O., Kurz, N., Litvinov, Y., Münzenberg, G., Nolden, F., Schmidt, K.-H., Scheidenberger, Ch., Simon, H., Steck, M., Weick, H., Enders, J., Pietralla, N., Richter, A., Schrieder, G., Zilges, A., Distler, M.O., Merkel, H., Müller, U., Junghans, A.R., Lenske, H., Fujiwara, M., Suda, T., Kato, S., Adachi, T., Hamieh, S., Harakeh, M.N., Kalantar-Nayestanaki, N., Wörtche, H., Berg, G.P.A., Koop, I.A., Logatchov, P.V., Otboev, A.V., Parkhomchuk, V.V., Shatilov, D.N., Shatunov, P.Y., Shatunov, Y.M., Shiyankov, S.V., Shvartz, D.I., Skrinsky, A.N., Chulkov, L.V., Danilin, B.V., Korsheninnikov, A.A., Kuzmin, E.A., Ogloblin, A.A., Volkov, V.A., Grishkin, Y., Lisin, V.P., Mushkarenkov, A.N., Nedorezov, V., Polonski, A.L., Rudnev, N.V., Turinge, A.A., Artukh, A., Avdeichikov, V., Ershov, S.N., Fomichev, A., Golovkov, M., Gorshkov, A.V., Grigorenko, L., Klygin, S., Krupko, S., Meshkov, I.N., Rodin, A., Sereda, Y., Seleznev, I., Sidorchuk, S., Syresin, E., Stepantsov, S., Ter-Akopian, G., Teterev, Y., Vorontsov, A.N., Kamerdzhiev, S.P., Litvinova, E.V., Karataglidis, S., Alvarez Rodriguez, R., Borge, M.J.G., Fernandez Ramirez, C., Garrido, E., Sarriguren, P., Vignote, J.R., Fraile Prieto, L.M., Lopez Herraiz, J., Moya de Guerra, E., Udias-Moinelo, J., Amaro Soriano, J.E., Lallena Rojo, A.M., Caballero, J.A., Johansson, H.T., Jonson, B., Nilsson, T., Nyman, G., Zhukov, M., Golubev, P., Rudolph, D., Hencken, K., Jourdan, J., Krusche, B., Rauscher, T., Kiselev, D., Trautmann, D., Al-Khalili, J., Catford, W., Johnson, R., Stevenson, P.D., Barton, C., Jenkins, D., Lemmon, R., Chartier, M., Cullen, D., Bertulani, C.A., and Heinz, A.

Published
2011
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38. First feasibility experiment for the EXL project with prototype detectors at the ESR storage ring

Author

Moeini, H., Ilieva, S., Aksouh, F., Boretzky, K., Chatillon, A., Corsi, A., Egelhof, P., Emling, H., Ickert, G., Jourdan, J., Kalantar Nayestanaki, N., Kiselev, D., Kiselev, O., Kozhuharov, C., Le Bleis, T., Le, X.C., Litvinov, Yu.A., Mahata, K., Meier, J.P., Nolden, F., Paschalis, S., Popp, U., Simon, H., Steck, M., Stöhlker, T., Weick, H., Werthmüller, D., and Zalite, A.

Published
2011
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41. Manipulating Reward Sensitivity Using Reward Circuit-Targeted Transcranial Magnetic Stimulation

Author

Jon Ryan, Jourdan J. Pouliot, Greg Hajcak, and Derek Evan Nee

Subjects
Anhedonia, Reward, Cognitive Neuroscience, Humans, Prefrontal Cortex, Radiology, Nuclear Medicine and imaging, Neurology (clinical), Theta Rhythm, Transcranial Magnetic Stimulation, Biological Psychiatry
Abstract

The reward circuit is important for motivation and learning, and dysregulations of the reward circuit are prominent in anhedonic depression. Noninvasive interventions that can selectively target the reward circuit may hold promise for the treatment of anhedonia.We tested a novel transcranial magnetic stimulation intervention for modulating the reward circuit. A total of 35 healthy individuals participated in a crossover controlled study targeting the reward circuit or a control site with intermittent theta burst stimulation (iTBS), an excitatory form of transcranial magnetic stimulation. Individual reward circuit targets were defined based upon functional magnetic resonance imaging functional connectivity with the ventral striatum, yielding targets in the rostromedial prefrontal cortex (rmPFC). Reward circuit function was assessed at baseline using functional magnetic resonance imaging, and reward circuit modulation was assessed using an event-related potential referred to as the reward positivity, which has been shown to reliably track reward sensitivity, as well as individual differences in depression and risk for depression.Relative to control iTBS, rmPFC iTBS enhanced the reward positivity. This effect was moderated by reward function, suggesting greater enhancements in individuals with lower reward function. This effect was also moderated by rmPFC-ventral striatum connectivity insofar as iTBS reached the rmPFC, suggesting that efficacy relies jointly on the strength of the rmPFC-ventral striatum pathway and ability of transcranial magnetic stimulation to target the rmPFC.These data suggest that the reward circuit can be modulated by rmPFC iTBS, and amenability to such modulations is related to measures of reward circuit function. This provides the first step toward a novel noninvasive treatment of disorders of the reward circuit.

Published
2021

43. Tensor Polarization Measurements of the Recoil Deuterons in Elastic Electron-Deuteron Scattering

Author

The, I., Arvieux, J., Beck, D. H., Beise, E. J., Boudard, A., Cairns, E. B., Cameron, J. M., Dodson, G. W., Dow, K. A., Farkhondeh, M., Fielding, H. W., Flanz, J. B., Garçon, M., Goloskie, R., Høibråten, S., Jourdan, J., Kowalski, S., Lapointe, C., McDonald, W. J., Ni, B., Pham, L. D., Redwine, R. P., Rodning, N. L., Roy, G., Schulze, M. E., Souder, P. A., Soukup, J., Turchinetz, W. E., Williamson, C. F., Wilson, K. E., Wood, S. A., Ziegler, W., Wissink, Scott W., editor, Goodman, Charles D., editor, and Walker, George E., editor

Published
1991
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45. Microstructure and Properties of a Three-Layer Nuclear Fuel Cladding Prototype Containing Erbium as a Neutronic Burnable Poison

Author

Brachet, J. C., primary, Olier, P., additional, Vandenberghe, V., additional, Doriot, S., additional, Urvoy, S., additional, Hamon, D., additional, Guilbert, T., additional, Mascaro, A., additional, Jourdan, J., additional, Toffolon-Masclet, C., additional, Tupin, M., additional, Bourdiliau, B., additional, Raepsaet, C., additional, Joubert, J. M., additional, and Aubin, J. L., additional

Published
2014
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46. Abstract P361: Reduced Cardiac Tmem65 In Mouse Hearts Results In Intercalated Disc Defects And Eventual Dilated Cardiomyopathy With Cardiac Fibrosis

Author

Teng, Allen C, primary, Gu, Liyang, additional, Di Paola, Michelle, additional, Williams, Zachary, additional, Au, Aaron, additional, Callaghan, Neal, additional, Hakem Zadeh, Farigol, additional, Zhao, Yu-Qing, additional, Fatah, Meena, additional, Chatterjee, Diptendu, additional, Jourdan, J. J, additional, Simmons, Craig A, additional, Kislinger, Thomas, additional, Yip, Christopher, additional, Gourdie, Robert G, additional, Hamilton, Robert M, additional, and Gramolini, Anthony, additional

Published
2021
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49. Dual kidney transplantation: Which technic to use?

Author

Girard, C., primary, Bentellis, I., additional, Mellouki, A., additional, Ahallal, Y., additional, Tibi, B., additional, Jourdan, J., additional, Chevallier, D., additional, Albano, L., additional, Durand, M., additional, and Mendel, L., additional

Published
2021
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50. Safe systems programming in Rust

Author

Jung, R., Jourdan, J.-H., Krebbers, R.J., Dreyer, D., Jung, R., Jourdan, J.-H., Krebbers, R.J., and Dreyer, D.

Abstract

Contains fulltext : 233983.pdf (Publisher’s version ) (Open Access)

Published
2021

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