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1. Photoproduction of $\eta$ mesons off the proton for $1.2 < E_\gamma < 4.7$ GeV using CLAS at Jefferson Laboratory

Author: Hu, T., Akbar, Z., Crede, V., Adhikari, K. P., Adhikari, S., Amaryan, M. J., Angelini, G., Asryan, G., Atac, H., Gayoso, C. Ayerbe, Barion, L., Battaglieri, M., Bedlinskiy, I., Benmokhtar, F., Bianconi, A., Biselli, A. S., Bossu, F., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Carman, D. S., Carvajal, J., Celentano, A., Chatagnon, P., Chetry, T., Ciullo, G., Clark, L., Clary, B. A., Cole, P. L., Contalbrigo, M., Cruz-Torres, R., D'Angelo, A., Dashyan, N., De Vita, R., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., Ehrhart, M., Alaoui, A. El, Fassi, L. El, Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Gavalian, G., Gilfoyle, G. P., Girod, F. X., Glazier, D. I., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Hayward, T. B., Heddle, D., Hicks, K., Hobart, A., Holtrop, M., Ilieva, Y., Illari, I., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Joo, K., Joosten, S., Keller, D., Khachatryan, M., Khanal, A., Khandaker, M., Kim, A., Kim, C. W., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Leali, M., Lenisa, P., Livingston, K., MacGregor, I. J. D., Marchand, D., Markov, N., Mascagna, V., McCracken, M. E., McKinnon, B., Meyer, C. A., Meziani, Z. E., Mineeva, T., Mokeev, V., Movsisyan, A., Munevar, E., Camacho, C. Munoz, Nadel-Turonski, P., Niccolai, S., Niculescu, G., O'Connell, T., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Pasyuk, E., Phelps, W., Pogorelko, O., Poudel, J., Price, J. W., Prok, Y., Protopopescu, D., Raue, B. A., Ripani, M., Ritman, J., Rizzo, A., Rosner, G., Rowley, J., Sabatie, F., Salgado, C., Schmidt, A., Schumacher, R. A., Sharabian, Y. G., Shrestha, U., Skorodumina, Iu., Sokhan, D., Soto, O., Sparveris, N., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Tan, J. A., Tyler, N., Ungaro, M., Venturelli, L., Voskanyan, H., Voutier, E., Watts, D. P., Wei, K., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., 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, 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), Centre National de la Recherche Scientifique (CNRS), and CLAS
Subjects: +p+eta%22">photon p --> p eta, health care facilities, manpower, and services, education, rho(770), Regge poles: exchange, Hadronic Physics and QCD, Regge, +pi%2B+pi-+pi0%22">eta --> pi+ pi- pi0, nucleon resonance, eta: photoproduction, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], High Energy Physics - Experiment, energy dependence, differential cross section: measured, CLAS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], angular distribution, Nuclear Experiment, health care economics and organizations, omega(783), photon: energy, eta: decay modes, coupled channel, vector meson: exchange, biological sciences, High Energy Physics::Experiment, sense organs, spectrometer, experimental results, Jefferson Lab
Abstract: Photoproduction cross sections are reported for the reaction $\gamma p\to p\eta$ using energy-tagged photons and the CLAS spectrometer at Jefferson Laboratory. The $\eta$ mesons are detected in their dominant charged decay mode, $\eta\to \pi^+\pi^-\pi^0$, and results on differential cross sections are presented for incident photon energies between 1.2 and 4.7 GeV. These new $\eta$ photoproduction data are consistent with earlier CLAS results but extend the energy range beyond the nucleon resonance region into the Regge regime. The normalized angular distributions are also compared with the experimental results from several other experiments, and with predictions of $\eta$ MAID\,2018 and the latest solution of the Bonn-Gatchina coupled-channel analysis. Differential cross sections $d\sigma/dt$ are presented for incident photon energies $E_\gamma > 2.9$ GeV ($W > 2.5$ GeV), and compared with predictions which are based on Regge trajectories exchange in the $t$-channel (Regge models). The data confirm the expected dominance of $\rho$, $\omega$ vector-meson exchange in an analysis by the Joint Physics Analysis Center., Comment: 24 pages, 22 figures
Published: 2020

2. Determination of the proton spin structure functions for $0.05<{Q}^{2}<5{\mathrm{GeV}}^{2}$ using CLAS

Author: Fersch, Robert, Guler, Nevzat, Bosted, Peter, Deur, Alexandre, Griffioen, Keith, Keith, Christopher, Kuhn, Sebastian, Minehart, Ralph, Prok, Yelena, Adhikari, K. P., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Ball, J., Balossino, A., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Bultmann, S., Burkert, V. D., Thanh Cao, Frank, Carman, D. S., Careccia, S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Djalali, C., Dodge, G. E., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, A., Filippi, A., Fleming, J. A., Forest, T. A., Garc con, M., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovatch, E., Gothe, R. W., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Heddle, D., Hicks, K., Holtrop, M., Hughes, S.M., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jenkins, D., Joo, K., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Kubarovsky, V., Lagerquist, V. G., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., Mckinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatie, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N.K., Watts, D.P., Wei, X., Weinstein, L.B., Zachariou, N., Zhang, J., 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), 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, 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 ), 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: Born approximation, electron: polarized beam, elastic scattering, structure function: spin, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], photon: asymmetry, microwaves, duality: quark hadron, p: target, p: spin, 13.88.+e, CLAS, deep inelastic scattering, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, hydrogen: target, background, 1.6 GeV2.5 GeV4.2 GeV5.7 GeV, inelastic scattering, moment, nucleon structure, 14.20.Dh, High Energy Physics::Experiment, deuteron: target, quark: polarization, absorption, spin: asymmetry, 13.60.Hb, experimental results, Jefferson Lab, photon: virtual
Abstract: International audience; We present the results of our final analysis of the full data set of g1p(Q2), the spin structure function of the proton, collected using CLAS at Jefferson Laboratory in 2000–2001. Polarized electrons with energies of 1.6, 2.5, 4.2, and 5.7 GeV were scattered from proton targets (NH315 dynamically polarized along the beam direction) and detected with CLAS. From the measured double spin asymmetries, we extracted virtual photon asymmetries A1p and A2p and spin structure functions g1p and g2p over a wide kinematic range (0.05 GeV2
Published: 2017

3. Determination of the Proton Spin Structure Functions for $0.05 < Q^{2} < 5 GeV^{2}$ using CLAS

Author: Fersch, Robert, Guler, Nevzat, Bosted, Peter, Deur, Alexandre, Griffioen, Keith, Keith, Christopher, Kuhn, Sebastian, Minehart, Ralph, Prok, Yelena, Adhikari, K. P., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Ball, J., Balossino, A., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Bultmann, S., Burkert, V. D., Thanh Cao, Frank, Carman, D. S., Careccia, S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Djalali, C., Dodge, G. E., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, A., Filippi, A., Fleming, J. A., Forest, T. A., Garc con, M., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovatch, E., Gothe, R. W., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Heddle, D., Hicks, K., Holtrop, M., Hughes, S.M., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jenkins, D., Joo, K., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Kubarovsky, V., Lagerquist, V. G., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., Mckinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatie, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N.K., Watts, D.P., Wei, X., Weinstein, L.B., Zachariou, N., Zhang, J., 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), 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: Born approximation, electron: polarized beam, elastic scattering, structure function: spin, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], photon: asymmetry, duality: quark hadron, microwaves, p: target, p: spin, 13.88.+e, deep inelastic scattering, CLAS, Nuclear Experiment, hydrogen: target, background, 1.6 GeV2.5 GeV4.2 GeV5.7 GeV, inelastic scattering, moment, nucleon structure, 14.20.Dh, High Energy Physics::Experiment, deuteron: target, quark: polarization, 13.60.Hb, spin: asymmetry, absorption, photon: virtual, Jefferson Lab, experimental results
Abstract: We present the results of our final analysis of the full data set of g_1^p(Q^2), the spin structure function of the proton, collected using CLAS at Jefferson Lab in 2000-2001. Polarized electrons with energies of 1.6, 2.5, 4.2 and 5.7 GeV were scattered from proton targets (15^NH_3 dynamically polarized along the beam direction) and detected with CLAS. From the measured double spin asymmetries, we extracted virtual photon asymmetries A_1^p and A_2^p and spin structure functions g_1^p and g_2^p over a wide kinematic range (0.05 GeV^2 < Q^2 < 5 GeV^2 and 1.08 GeV < W < 3 GeV), and calculated moments of g_1^p. We compare our final results with various theoretical models and expectations, as well as with parameterizations of the world data. Our data, with their precision and dense kinematic coverage, are able to constrain fits of polarized parton distributions, test pQCD predictions for quark polarizations at large x, offer a better understanding of quark-hadron duality, and provide more precise values of higher-twist matrix elements in the framework of the Operator Product Expansion., Comment: 38 pages, 40 figures
Published: 2017

4. Measurement of target and double-spin asymmetries for the e ⃗ p ⃗ → e π + ( n ) reaction in the nucleon resonance region at low Q 2

Author: Zheng, X., Adhikari, P., Bosted, P., Deur, A., Drozdov, V., El Fassi, L., Kang, Hyekoo, Kovacs, K., Kuhn, S., Long, E., Phillips, S., Ripani, M., Slifer, K., Smith, C., Adikaram, D., Akbar, Z., Amaryan, J., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, S., Briscoe, J., Bültmann, S., Burkert, D., Carman, S., Celentano, A., Chandavar, S., Charles, G., Chen, Jie, Chetry, T., Choi, Seonho, Ciullo, G., Clark, L., Colaneri, L., Cole, P., Compton, N., Contalbrigo, M., Crede, V., d'Angelo, A., Dashyan, N., de Vita, R., de Sanctis, E., Djalali, C., Dodge, E., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, P., Giovanetti, K., Girod, X., Gleason, C., Golovach, E., Gothe, R., Griffioen, A., Guidal, M., Guler, N., Guo, L., Hanretty, C., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hughes, M., Ilieva, Y., Ireland, D., Ishkhanov, S., Isupov, E., Jenkins, D., Jiang, H., Jo, H., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., Macgregor, I., Markov, N., Mckinnon, B., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Net, A., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J., Puckett, J., Raue, A., Rizzo, A., Rosner, G., Rossi, P., Roy, Pascal, Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, D., Sokhan, D., Sparveris, N., Stankovic, I., Strakovsky, I., Strauch, S., Taiuti, M., Tian, Ye, Ungaro, M., Voskanyan, H., Voutier, E., Walford, N., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., 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), CLAS Collaboration, 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], High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment
Abstract: We report measurements of target- and double-spin asymmetries for the exclusive channel $\vec e\vec p\to e\pi^+ (n)$ in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized NH$_3$ target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3 and 3.0 GeV. The new results are consistent with previous CLAS publications but are extended to a low $Q^2$ range from $0.0065$ to $0.35$ (GeV$/c$)$^2$. The $Q^2$ access was made possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low as $6^\circ$. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis prediction from SAID and the dynamic model DMT. In many kinematic regions our results, in particular results on the target asymmetry, help to constrain the polarization-dependent components of these models., Comment: 20 pages, 15 figures, to appear in Phys. Rev. C
Published: 2016

5. Target and beam-target spin asymmetries in exclusive π + and π − electroproduction with 1.6- to 5.7-GeV electrons

Author: Bosted, P. E., Biselli, A. S., Careccia, S., Dodge, G., Fersch, R., Guler, N., Kuhn, S. E., Pierce, J., Prok, Y., Zheng, X., Adhikari, K. P., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Boiarinov, S., Briscoe, W. J., Bültmann, S., Burkert, V. D., Cao, T., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., Deur, A., Djalali, C., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Eugenio, P., Fanchini, E., Fedotov, G., Filippi, A., Fleming, J. A., Forest, T. A., Fradi, A., Garçon, M., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guo, L., Hafidi, K., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joo, K., Joosten, S., Keller, D., Khandaker, M., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuleshov, S. V., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., McCracken, M. E., McKinnon, B., Meyer, C. A., Minehart, R., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Nadel-Turonski, P., Net, L. A., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Procureur, S., Protopopescu, D., Puckett, A. J. R., Raue, B. A., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Seder, E., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sparveris, N., Stankovic, Ivana, Stepanyan, S., Strakovsky, I. I., Strauch, S., Sytnik, V., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., 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), 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 Collaboration, 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: Nuclear and High Energy Physics, Economica, Socio-culturale, Ambientale, High Energy Physics::Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, QC
Abstract: Beam-target double spin asymmetries and target single-spin asymmetries in exclusive $\pi^+$ and $\pi^-$ electroproduction were obtained from scattering of 1.6 to 5.7 GeV longitudinally polarized electrons from longitudinally polarized protons (for $\pi^+$) and deuterons (for $\pi^-$) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The kinematic range covered is $1.11.5$ GeV. Very large target-spin asymmetries are observed for $W>1.6$ GeV. When combined with cross section measurements, the present results will provide powerful constraints on nucleon resonance amplitudes at moderate and large values of $Q^2$, for resonances with masses as high as 2.3 GeV., Comment: 47 pages, 24 figures. This is a revised version that was accepted for publication in Phys. Rev. C. in early October, 2016
Published: 2016

6. 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

7. 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

8. 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

9. 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

10. 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

11. $\pi^0$ 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

12. 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

13. 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

14. 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

15. 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

16. 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

17. 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

18. 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

19. 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

20. 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

21. 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

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. 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

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24 results on '"Asryan, G"'

1. Photoproduction of $\eta$ mesons off the proton for $1.2 < E_\gamma < 4.7$ GeV using CLAS at Jefferson Laboratory

2. Determination of the proton spin structure functions for $0.05<{Q}^{2}<5{\mathrm{GeV}}^{2}$ using CLAS

3. Determination of the Proton Spin Structure Functions for $0.05 < Q^{2} < 5 GeV^{2}$ using CLAS

4. Measurement of target and double-spin asymmetries for the e ⃗ p ⃗ → e π + ( n ) reaction in the nucleon resonance region at low Q 2

5. Target and beam-target spin asymmetries in exclusive π + and π − electroproduction with 1.6- to 5.7-GeV electrons

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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24 results on '"Asryan, G"'

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