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39 results on '"Paremuzyan R"'

1. Search for a dark photon in electroproduced $e^{+}e^{-}$ pairs with the Heavy Photon Search experiment at JLab

Author

Adrian, P.H., Baltzell, N.A., Battaglieri, M., Bondí, M., Boyarinov, S., Bueltmann, S., Burkert, V.D., Calvo, D., Carpinelli, M., Celentano, A., Charles, G., Colaneri, L., Cooper, W., Cuevas, C., D’Angelo, A., Dashyan, N., De Napoli, M., De Vita, R., Deur, A., Dupre, R., Egiyan, H., Elouadrhiri, L., Essig, R., Fadeyev, V., Field, C., Filippi, A., Freyberger, A., Garçon, M., Gevorgyan, N., Girod, F.X., Graf, N., Graham, M., Griffioen, K.A., Grillo, A., Guidal, M., Herbst, R., Holtrop, M., Jaros, J., Kalicy, G., Khandaker, M., Kubarovsky, V., Leonora, E., Livingston, K., Maruyama, T., McCarty, K., McCormick, J., McKinnon, B., Moffeit, K., Moreno, O., Munoz Camacho, C., Nelson, T., Niccolai, S., Odian, A., Oriunno, M., Osipenko, M., Paremuzyan, R., Paul, S., Randazzo, N., Raydo, B., Reese, B., Rizzo, A., Schuster, P., Sharabian, Y.G., Simi, G., Simonyan, A., Sipala, V., Sokhan, D., Solt, M., Stepanyan, S., Szumila-Vance, H., Toro, N., Uemura, S., Ungaro, M., Voskanyan, H., Weinstein, L.B., Wojtsekhowski, B., Yale, B., 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), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, HPS, 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), Adrian, P, Baltzell, N, Battaglieri, M, Bondí, M, Boyarinov, S, Bueltmann, S, Burkert, V, Calvo, D, Carpinelli, M, Celentano, A, Charles, G, Colaneri, L, Cooper, W, Cuevas, C, D'Angelo, A, Dashyan, N, De Napoli, M, De Vita, R, Deur, A, Dupre, R, Egiyan, H, Elouadrhiri, L, Essig, R, Fadeyev, V, Field, C, Filippi, A, Freyberger, A, Garçon, M, Gevorgyan, N, Girod, F, Graf, N, Graham, M, Griffioen, K, Grillo, A, Guidal, M, Herbst, R, Holtrop, M, Jaros, J, Kalicy, G, Khandaker, M, Kubarovsky, V, Leonora, E, Livingston, K, Maruyama, T, Mccarty, K, Mccormick, J, Mckinnon, B, Moffeit, K, Moreno, O, Munoz Camacho, C, Nelson, T, Niccolai, S, Odian, A, Oriunno, M, Osipenko, M, Paremuzyan, R, Paul, S, Randazzo, N, Raydo, B, Reese, B, Rizzo, A, Schuster, P, Sharabian, Y, Simi, G, Simonyan, A, Sipala, V, Sokhan, D, Solt, M, Stepanyan, S, Szumila-Vance, H, Toro, N, Uemura, S, Ungaro, M, Voskanyan, H, Weinstein, L, Wojtsekhowski, B, and Yale, B

Subjects
photon: decay, photon: hidden sector, Physics and Astronomy (miscellaneous), accelerator, engineering, FOS: Physical sciences, S029HPH, coupling constant: upper limit, quantum electrodynamics: background, Newport News CEBAF Linac, photon: electroproduction, Settore FIS/04 - Fisica Nucleare e Subnucleare, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), photon: mass, photon: heavy, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], mass spectrum: (electron positron), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], luminosity: high, experimental results, Jefferson Lab
Abstract

The Heavy Photon Search experiment took its first data in a 2015 engineering run using a 1.056 GeV, 50 nA electron beam provided by CEBAF at the Thomas Jefferson National Accelerator Facility, searching for an electro-produced dark photon. Using 1.7 days (1170 nb$^{-1}$) of data, a search for a resonance in the $e^{+}e^{-}$ invariant mass distribution between 19 and 81 MeV/c$^2$ showed no evidence of dark photon decays above the large QED background, confirming earlier searches and demonstrating the full functionality of the experiment. Upper limits on the square of the coupling of the dark photon to the Standard Model photon are set at the level of 6$\times$10$^{-6}$. In addition, a search for displaced dark photon decays did not rule out any territory but resulted in a reliable analysis procedure that will probe hitherto unexplored parameter space with future, higher luminosity runs., Comment: 8 pages, Proceedings of the 39th International Conference on High Energy Physics (ICHEP 2018), 4-11 July, 2018, Seoul, Korea

Published
2018

2. Measurement of the beam spin asymmetry of e→p→e′p′η in the deep-inelastic regime with CLAS

Author

Zhao, B., Kim, A., Joo, K., Bedlinskiy, I., Kim, W., Kubarovsky, V., Ungaro, M., Adhikari, S., Akbar, Z., Angelini, G., Avakian, H., Ball, J., Baltzell, N.A., Barion, L., Bashkanov, M., Battaglieri, M., Batourine, V., Biselli, A.S., Boiarinov, S., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Carman, D.S., Celentano, A., Chatagnon, P., Chetry, T., Ciullo, G., Clark, L., Clary, B.A., Cole, P.L., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dupre, R., Egiyan, H., Ehrhart, M., El Alaoui, A., El Fassi, L., Eugenio, P., Filippi, A., Forest, T.A., Gavalian, G., Ghandilyan, Y., Gilfoyle, G.P., Girod, F.X., Golovatch, E., Gothe, R.W., Griffioen, K.A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jenkins, D., Jo, H.S., Johnston, S., Kabir, M.L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Klein, A., Klein, F.J., Kuhn, S.E., Kuleshov, S.V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I.J.D., Marchand, D., Markov, N., McKinnon, B., Meyer, C.A., Meziani, Z.E., Mirazita, M., Mokeev, V., Montgomery, R.A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A.I., Paolone, M., Paremuzyan, R., Park, K., Pogorelko, O., Price, J.W., Prok, Y., Protopopescu, D., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Sabatié, F., Salgado, C., Schumacher, R.A., Sharabian, Y.G., Skorodumina, Iu., Smith, G.D., Sokhan, D., Sparveris, N., Stepanyan, S., Strakovsky, I.I., Strauch, S., Taiuti, M., Tan, J.A., Voskanyan, H., Voutier, E., Wang, R., Wei, X., Wood, M.H., Zachariou, N., Zhang, J., and Zhao, Z.W.

Subjects
Nucleon structure, Deeply Virtual Meson Production, Chiral-odd generalized parton distributions, High Energy Physics::Phenomenology, Chiral-odd generalized parton distributions, CLAS collaboration, Deeply Virtual Meson Production, Nucleon structure, Socio-culturale, CLAS collaboration, High Energy Physics::Experiment, Nuclear Experiment, lcsh:Physics, lcsh:QC1-999, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

The beam spin asymmetry of the exclusive pseudoscalar channel e→p→e′p′η was measured for the first time in the deep-inelastic regime (W>2 GeV/c2 and Q2>1 GeV2/c2) using a longitudinally polarized 5.78 GeV electron beam at Jefferson Lab with the CEBAF Large Acceptance Spectrometer. The data were accumulated in 144 four-dimensional bins of Q2, xB, −t and ϕ over a wide kinematic range, where ϕ is the azimuthal angle between the lepton and hadron scattering planes, The measured azimuthal dependence with large amplitudes of the sin⁡ϕ moments is a clear indication of a substantial contribution to the polarized cross-section from transversely polarized virtual photons. In the framework of generalized parton distributions (GPDs) this contribution is expressed via longitudinal-transverse interference between chiral-even and chiral-odd GPDs. The experimental results are compared to the existing theoretical models demonstrating the sensitivity to the product of chiral-odd and chiral-even GPDs and provide new constraints to the existing GPD parameterizations. Keywords: Nucleon structure, CLAS collaboration, Deeply Virtual Meson Production, Chiral-odd generalized parton distributions

Published
2019

3. Ξ* photoproduction from threshold to W=3.3 GeV

Author

Goetz, J.T., Hicks, K., Kunkel, M.C., Price, J.W., Weygand, D.P., Adhikari, S., Anefalos Pereira, S., Battaglieri, M., Bedlinskiy, I., Biselli, A.S., Boiarinov, S., Bookwalter, C., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Cao, F., Carman, D.S., Celentano, A., Chandavar, S., Chatagnon, P., Chetry, T., Ciullo, G., Cole, P.L., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., Ehrhart, M., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Filippi, A., Gevorgyan, N., Ghandilyan, Y., Girod, F.X., Glazier, D.I., Golovatch, E., Gothe, R.W., Griffioen, K.A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Harrison, N., Hattawy, M., Heddle, D., Holtrop, M., Ireland, D.G., Ishkhanov, B.S., Isupov, E.L., Jo, H.S., Joosten, S., Kabir, M.L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, F.J., Kubarovsky, V., Lanza, L., Livingston, K., MacGregor, I.J.D., McKinnon, B., Meyer, C.A., Mirazita, M., Mokeev, V., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A.I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Pogorelko, O., Prok, Y., Protopopescu, D., Raue, B.A., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Sabatié, F., Saini, M.S., Salgado, C., Schott, D., Schumacher, R.A., Sharabian, Y.G., Skorodumina, Iu., Sober, D.I., Sokhan, D., Sparveris, N., Strakovsky, I.I., Strauch, S., Taiuti, M., Tan, J.A., Ungaro, M., Voskanyan, H., Voutier, E., Wang, R., Wei, X., Wood, M.H., Zachariou, N., Zhang, J., and Zhao, Z.W.

Subjects
Nuclear and High Energy Physics, Nuclear Theory, Socio-culturale, High Energy Physics::Experiment, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

The doubly strange Ξ baryons provide an effective way to study a puzzle called the missing-baryons problem where both quark models and lattice gauge theory predict more baryon excited states than are seen experimentally. However, few of these excited states have been observed with any certainty. Here, high-mass Ξ∗ states have been searched for in photoproduction with the detector of the CLAS Collaboration, and upper limits for the total cross sections have been established from threshold to W=3.3 GeV. In addition, the total cross sections of the ground-state Ξ−(1320) and first excited state Ξ−(1530) are presented, extending significantly the center-of-mass energy range of previous data.

Published
2018

4. Beam-target helicity asymmetry E in K0Λ and K0Σ0 photoproduction on the neutron

Author

Ho, D. H., Schumacher, R. A., D'Angelo, A., Deur, A., Fleming, J., Hanretty, C., Kageya, T., Klein, F. J., Klempt, E., Lowry, M. M., Lu, H., Nikonov, V. A., Peng, P., Sandorfi, A. M., Sarantsev, A. V., Strakovsky, I. I., Walford, N. K., Wei, X., Workman, R. L., Adhikari, K. P., Adhikari, S., Adikaram, D., Akbar, Z., Ball, J., Barion, L., Bashkanov, M., Bass, C. D., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Boiarinov, S., Burkert, V. D., Cao, F., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chatagnon, P., Chetry, T., Ciullo, G., Clary, B. A., Cole, P., Collins, P., Contalbrigo, M., Crede, V., De Vita, R., Defurne, M., Diehl, S., Djalali, C., Dupre, R., Egiyan, H., Ehrhart, M., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fegan, S., Fersch, R., Filippi, A., Fradi, A., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Hafidi, K., Hakobyan, H., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Johnston, S., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Kubarovsky, V., Laine, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I.J.D., Marchand, D., Markov, N., Mayer, M., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R.A., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., O'Connell, T., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Rehfuss, M., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Sabatié, F., Salgado, C., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sober, D. I., Sokhan, D., Sparveris, N., Strauch, S., Taiuti, M., Tan, J. A., Ungaro, M., Voskanyan, H., Voutier, E., Wang, R., Watts, D. P., Weinstein, L. B., Whisnant, C. S., Wood, M. H., Zachariou, N., Zhang, J., Zhao, Z. W., and Zonta, I.

Subjects
Nuclear and High Energy Physics, Nuclear Theory, Socio-culturale, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

We report the first measurements of the E beam-target helicity asymmetry for the →γ→n→K0Λ and K0Σ0 channels in the energy range 1.70≤W≤2.34 GeV. The CLAS system at Jefferson Lab uses a circularly polarized photon beam and a target consisting of longitudinally polarized solid molecular hydrogen deuteride with low background contamination for the measurements. The multivariate analysis method boosted decision trees is used to isolate the reactions of interest. Comparisons with predictions from the KaonMAID, SAID, and Bonn-Gatchina models are presented. These results will help separate the isospin I=0 and I=1 photocoupling transition amplitudes in pseudoscalar meson photoproduction.

Published
2018

5. Measurements of the γvp→p′π+π- cross section with the CLAS detector for 0.4 GeV2<Q2<1.0 GeV2 and 1.3 GeV<W<1.825 GeV

Author

Fedotov, Gv, Skorodumina, Ia, Burkert, Vd, Gothe, Rw, Hicks, K, Mokeev, Vi, Adhikari, S, Armstrong, Wr, Avakian, H, Ball, J, Balossino, I, Barion, L, Bashkanov, M, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, As, Boiarinov, S, Briscoe, Wj, Brooks, Wk, Carman, Ds, Celentano, A, Charles, G, Chetry, T, Ciullo, G, Clary, Ba, Cole, Pl, Contalbrigo, M, Cortes, O, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Defurne, M, Deur, A, Djalali, C, Dupre, R, Egiyan, H, Fassi, Le, Eugenio, P, Fersch, R, Gavalian, G, Ghandilyan, Y, Gilfoyle, Gp, Girod, Fx, Golovatch, E, Griffioen, Ka, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Holtrop, M, Ilieva, Y, Ireland, Dg, Ishkhanov, Bs, Isupov, El, Jenkins, D, H. S., J, Johnston, S, Joosten, S, Kabir, Ml, Keller, D, Khachatryan, G, Khachatryan, M, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, Fj, Kubarovsky, V, Kuleshov, Sv, Lanza, L, Lenisa, P, Livingston, K, Macgregor, Ijd, Markov, N, Mckinnon, B, Mineeva, T, Montgomery, Ra, Camacho, Cm, Nadel-Turonski, P, Niccolai, S, Niculescu, G, Osipenko, M, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Pogorelko, O, Price, Jw, Procureur, S, Prok, Y, Protopopescu, D, Ripani, M, Riser, D, Ritchie, Bg, Rizzo, A, Sabatié, F, Salgado, C, Schumacher, Ra, Sharabian, Yg, Smith, Gd, Sober, Di, Sokhan, D, Sparveris, N, Strakovsky, Ii, Strauch, S, Taiuti, M, Tan, Ja, Tyler, N, Ungaro, M, Voskanyan, H, Voutier, E, Wei, X, Wood, Mh, Zachariou, N, Zhang, J, and Zhao, Zw

Subjects
Nuclear and High Energy Physics, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2018

6. Center of Mass Motion of Short-Range Correlated Nucleon Pairs studied via the A(e,e^{'}pp) Reaction

Author

Cohen, E. O., Hen, O., Piasetzky, E., Weinstein, L. B., Duer, M., Schmidt, A., Korover, I., Hakobyan, H., Adhikari, S., Akbar, Z., Amaryan, M. J., Avakian, H., Ball, J., Barion, L., Battaglieri, M., Beck, A., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W., Burkert, V. D., Cao, F., Carman, D. S., Celentano, A., Charles, G., Chatagnon, P., Chetry, T., Ciullo, G., Clary, B. A., Contalbrigo, M., Crede, V., Cruz Torres, R., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dupre, R., Egiyan, H., Ehrhart, M., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Golovatch, E., Gothe, R. W., Griffioen, K. A., Hafidi, K., Harrison, N., Hauenstein, F., Heddle, D., Hicks, K., Holtrop, M., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., H. S., Jo, Johnston, S., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Lanza, L., Lenisa, P., Livingston, K., Macgregor, I. J. D., Marchand, D., Mckinnon, B., Mey-Tal Beck, S., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Mustapha, B., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Pasyuk, E., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Sabatie, F., Schmookler, B. A., Schumacher, R. A., Sharabian, Y. G., Sokhan, D., Sparveris, N., Stepanyan, S., Strauch, S., Taiuti, M., Tan, J. A., Ungaro, M., Voskanyan, H., Voutier, E., Wang, R., Watts, D. P., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., Zheng, X., and Zhao, Z. W.

Subjects
trasparency, Physics and Astronomy (all), proton propagation, High Q(2), Socio-culturale, momentum, High Q(2), momentum, energy, trasparency, proton propagation, spectral function, spectral function, energy, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

Short-range correlated (SRC) nucleon pairs are a vital part of the nucleus, accounting for almost all nucleons with momentum greater than the Fermi momentum (k_{F}). A fundamental characteristic of SRC pairs is having large relative momenta as compared to k_{F}, and smaller center of mass (c.m.) which indicates a small separation distance between the nucleons in the pair. Determining the c.m. momentum distribution of SRC pairs is essential for understanding their formation process. We report here on the extraction of the c.m. motion of proton-proton (pp) SRC pairs in carbon and, for the first time in heavier and ansymetric nuclei: aluminum, iron, and lead, from measurements of the A(e,e^{'}pp) reaction. We find that the pair c.m. motion for these nuclei can be described by a three-dimensional Gaussian with a narrow width ranging from 140 to 170 MeV/c, approximately consistent with the sum of two mean-field nucleon momenta. Comparison with calculations appears to show that the SRC pairs are formed from mean-field nucleons in specific quantum states.

Published
2018

7. Measurement of the beam asymmetry Σ and the target asymmetry T in the photoproduction of ω mesons off the proton using CLAS at Jefferson Laboratory

Author

Roy, P., Akbar, Z., Park, S., Crede, V., Anisovich, A. V., Denisenko, I., Klempt, E., Nikonov, V. A., Sarantsev, A. V., Adhikari, K. P., Adhikari, S., Anefalos Pereira, S., Ball, J., Balossino, I., Bashkanov, M., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brock, J., Brooks, W. K., Burkert, V. D., Carlin, C., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clary, B. A., Cole, P. L., Contalbrigo, M., D'Angelo, A., Dashyan, N., De Vita, R., Deur, A., Djalali, C., Dugger, M., Dupre, R., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Filippi, A., Fradi, A., Gavalian, G., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Hattawy, M., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Joo, K., Joosten, S., Keith, C. D., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., 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., Mayer, M., McCracken, M. E., McKinnon, B., Meekins, D. G., Meyer, C. A., Meziani, Z. E., Mineeva, T., Mokeev, V., Montgomery, R.A., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, E., Phelps, W., Pierce, J. J., Pogorelko, O., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Ritchie, B. G., Rizzo, A., Rosner, G., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G.D., Sober, D. I., Sokhan, D., Sparveris, N., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tan, J. A., Torayev, B., Ungaro, M., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., and Zhao, Z. W.

Subjects
Nuclear and High Energy Physics, Nuclear Theory, Socio-culturale, High Energy Physics::Experiment, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

The photoproduction of ω mesons off the proton has been studied in the reaction γp → p ω using the CEBAF\ud Large Acceptance Spectrometer (CLAS) and the frozen-spin target in Hall B at the Thomas Jefferson National\ud Accelerator Facility. For the first time, the target asymmetry T has been measured in photoproduction from the\ud decay ω → π+π−π0, using a transversely polarized target with energies ranging from just above the reaction\ud threshold up to 2.8 GeV. Significant nonzero values are observed for these asymmetries, reaching about 30–40%\ud in the third-resonance region. New measurements for the photon-beam asymmetry Σ are also presented, which\ud agree well with previous CLAS results and extend the world database up to 2.1 GeV. These data and additional\ud ω photoproduction observables from CLAS were included in a partial-wave analysis within the Bonn-Gatchina\ud framework. Significant contributions from s-channel resonance production were found in addition to t-channel\ud exchange processes.

Published
2018

8. Photoproduction of $K^+K^-$ meson pairs on the proton

Author

Lombardo, S., Battaglieri, M., Celentano, A., D’Angelo, A., De Vita, R., Filippi, A., Glazier, Derek I., Hughes, S. M., Mathieu, V., Rizzo, A., Santopinto, E., Stankovic, I., Szczepaniak, A. P., Watts, D., Zana, L., Adhikari, S., Akbar, Z., Avakian, H., Ball, J., Baltzell, N. A., Barion, L., Bashkanov, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Burkert, V. D., Cao, F., Carman, D. S., Chatagnon, P., Chetry, T., Ciullo, G., Clark, L., Clary, B. A., Cole, P. L., Contalbrigo, M., Crede, V., Dashyan, N., De Sanctis, E., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., Ehrhart, M., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Johnston, S., Joo, K., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I.J.D., Marchand, D., Markov, N., McKinnon, B., Mestayer, M. D., Meyer, C. A., Meziani, Z. E., Mirazita, M., Mokeev, V., Montgomery, R.A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Ripani, M., Riser, D., Ritchie, B. G., Rosner, G., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sober, D. I., Sokhan, D., Sparveris, N., Strakovsky, I. I., Strauch, S., Taiuti, M., Tan, J. A., Ungaro, M., Voskanyan, H., Voutier, E., Wang, R., 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, 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
Physics and Astronomy (miscellaneous), Socio-culturale, FOS: Physical sciences, mass spectrum: (K+ K-), High Energy Physics - Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare, mass spectrum: (K+ p), differential cross section: measured, High Energy Physics - Experiment (hep-ex), statistical analysis, K: pair production, +K%2B+K-+p%22">photon p --> K+ K- p, CLAS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], JLAB, Particle Physics Experiments, angular distribution, photon p: exclusive reaction, Nuclear Experiment (nucl-ex), Nuclear Experiment, P-WAVE INTERFERENCE, CLAS, SYSTEM, HYDROGEN, JLAB, P-WAVE INTERFERENCE, K: photoproduction, momentum transfer, photon p: inelastic scattering, partial wave analysis, amplitude analysis, HYDROGEN, photon: energy, High Energy Physics::Experiment, SYSTEM, experimental results, Jefferson Lab
Abstract

The exclusive reaction $\gamma p \to p K^+ K^-$ was studied in the photon energy range $3.0 - 3.8 \mbox{ GeV}$ and momentum transfer range $0.6, Comment: arXiv admin note: text overlap with arXiv:0907.1021

Published
2018

9. Measurement of the ${Q}^{2}$ Dependence of the Deuteron Spin Structure Function ${g}_{1}$ and its Moments at Low ${Q}^{2}$ with CLAS

Author

Adhikari, K. P., Deur, A., El Fassi, L., Kang, H., Kuhn, S. E., Ripani, M., Slifer, K., Zheng, X., Adhikari, S., Akbar, Z., Amaryan, M. J., Avakian, H., Ball, J., Balossino, I., Barion, L., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Bosted, P., Briscoe, W. J., Brock, J., Bültmann, S., Burkert, V. D., Thanh Cao, F., Carlin, C., Carman, D. S., Celentano, A., Charles, G., Chen, J.-P., Chetry, T., Choi, S., Ciullo, G., Clark, L., Cole, P. L., Contalbrigo, M., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Djalali, C., Dodge, G. E., Drozdov, V., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fedotov, G., Filippi, A., Ghandilyan, Y., Gilfoyle, G. P., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Isupov, E. L., Jenkins, D., Jo, H. S., Johnston, S. C., Joo, K., Joosten, S., Kabir, M. L., Keith, C. D., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, W., Klein, A., Klein, F. J., Konczykowski, P., Kovacs, K., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., Long, E., MacGregor, I. J. D., Markov, N., Mayer, M., McKinnon, B., Meekins, D. G., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niculescu, G., Niccolai, S., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L., Paremuzyan, R., Park, K., Pasyuk, E., Payette, D., Phelps, W., Phillips, S. K., Pierce, J., Pogorelko, O., Poudel, J., Price, J. W., Prok, Y., Protopopescu, D., Raue, B. A., Rizzo, A., Rosner, G., Rossi, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Shigeyuki, T., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sparveris, N., Sokhan, D., Stepanyan, S., Strakovsky, I. I., Strauch, S., Sulkosky, V., Taiuti, M., Tan, J. A., Ungaro, M., Voutier, E., Wei, X., Weinstein, L. B., 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, 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
photonuclear reactions, Socio-culturale, polarized target, FOS: Physical sciences, Strong interaction, structure function: spin, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 25.30.Rw, Settore FIS/04 - Fisica Nucleare e Subnucleare, magnetic moments, Physics and Astronomy (all), benchmark, spin: polarizability, Chiral perturbation theory, CLAS, quantum chromodynamics, Nuclear Experiment (nucl-ex), Nuclear Experiment, polarization, Polarization phenomena, High Energy Physics::Phenomenology, 11.55.Hx, deuteron: structure function, perturbation theory: chiral, QCD in nuclear reactions, proton scattering, magnetic moments, polarized target, photonuclear reactions, Chiral perturbation theory, Lepton induced nuclear reactions, Polarization phenomena, Strong interaction, moment, Automatic Keywords, deuteron: spin, QCD in nuclear reactions, Lepton induced nuclear reactions, 12.38.Qk, proton scattering, Drell-Hearn-Gerasimov, High Energy Physics::Experiment, 13.60.Hb, experimental results
Abstract

We measured the $g_1$ spin structure function of the deuteron at low $Q^{2}$, where QCD can be approximated with chiral perturbation theory ($\chi$PT). The data cover the resonance region, up to an invariant mass of $W\approx1.9$~GeV. The generalized Gerasimov-Drell-Hearn sum, the moment $\bar{\Gamma}_{1}^{d}$ and the integral $\bar{I}_\gamma^d$ related to the spin polarizability $\gamma_{0}^{d}$ are precisely determined down to a minimum $Q^2$ of 0.02~GeV$^2$ for the first time, about 2.5 times lower than that of previous data. We compare them to several $\chi$PT calculations and models. These results are the first in a program of benchmark measurements of polarization observables in the $\chi$PT domain., Comment: Version 1: version published in Phys. Rev. Lett. 6 pages, 3 figures. Supplementary material: data table for g1d and its moments (10 pages) V2: Figures labels changed and text slightly modified to clarify the exact nature of the measured moments V3: Corrected a typo page 5 for the theoretical value expected for deuteron GDH sum rule (agreement between measurement and expectation is improved)

Published
2018

10. Measurement of the differential and total cross sections of the γd→K0 Λ(p) reaction within the resonance region

Author

Compton, N., Taylor, C. E., Hicks, K., Cole, P., Zachariou, N., Ilieva, Y., Nadel-Turonski, P., Klempt, E., Nikonov, V. A., Sarantsev, A. V., Adhikari, K. P., Adhikari, S., Akbar, Z., Anefalos Pereira, S., Avakian, H., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Camp, M., Cao, Frank Thanh, Cao, T., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Filippi, A., Fleming, J. A., Fradi, A., Gavalian, G., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Glazier, D. I., Gleason, C., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Heddle, D., Holtrop, M., Hughes, S. M., Hyde, C. E., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Joo, K., Joosten, S., Keller, D., Khachatryan, G., Khachatryan, M., 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., McKinnon, B., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munevar, E., Munoz Camacho, C., Murdoch, G., 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., Prok, Y., Protopopescu, D., Raue, B. A., Ripani, M., Ritchie, B. G., Rizzo, A., Rosner, G., Sabatié, 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., Torayev, B., Trivedi, A., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Wood, M. H., and Zhang, J.

Subjects
High Energy Physics::Experiment, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

We report the first measurement of differential and total cross sections for the \ud γ\ud d\ud →\ud K\ud 0\ud Λ\ud (\ud p\ud )\ud reaction, using data from the CLAS detector at the Thomas Jefferson National Accelerator Facility. Data collected during two separate experimental runs were studied with photon-energy coverage 0.8–3.6 GeV and 0.5– 2.6 GeV, respectively. The two measurements are consistent giving confidence in the method and determination of systematic uncertainties. The cross sections are compared with predictions from the KAON-MAID theoretical model (without kaon exchange), which deviate from the data at higher \ud W\ud and at forward kaon angles. These data, along with previously published cross sections for \ud K\ud +\ud Λ\ud photoproduction, provide essential constraints on the nucleon resonance spectrum. A first partial wave analysis was performed that describes the data without the introduction of new resonances.

Published
2017

11. Measurement of the helicity asymmetry e in ω→π+π-π0 photoproduction

Author

Akbar, Z, Roy, P, Park, S, Crede, V, Anisovich, Av, Denisenko, I, Klempt, E, Nikonov, Va, Sarantsev, Av, Adhikari, Kp, Adhikari, S, Amaryan, Mj, Anefalos Pereira, S, Avakian, H, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Boiarinov, S, Briscoe, Wj, Brock, J, Brooks, Wk, Burkert, Vd, Cao, Ft, Carlin, C, Carman, Ds, Celentano, A, Charles, G, Chetry, T, Ciullo, G, Clark, L, Cole, Pl, Contalbrigo, M, Cortes, O, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Dugger, M, Dupre, R, Egiyan, H, El Fassi, L, Eugenio, P, Fedotov, G, Fersch, R, Filippi, A, Fradi, A, Garcon, M, Gevorgyan, N, Giovanetti, Kl, Girod, Fx, Gleason, C, Gohn, W, Golovatch, E, Gothe, Rw, Griffioen, Ka, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Hicks, K, Hollis, G, Holtrop, M, Ireland, Dg, Ishkhanov, Bs, Isupov, El, Jenkins, D, Joosten, S, Keith, Cd, Keller, D, Khachatryan, G, Khachatryan, M, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, Fj, Kubarovsky, V, Lanza, L, Livingston, K, Macgregor, Ijd, Markov, N, Mckinnon, B, Meekins, Dg, Mineeva, T, Mokeev, V, Movsisyan, A, Munoz Camacho, C, Nadel-Turonski, P, Niccolai, S, Osipenko, M, Ostrovidov, Ai, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Phelps, W, Pogorelko, O, Price, Jw, Prok, Y, Protopopescu, D, Raue, Ba, Ripani, M, Ritchie, Bg, Rizzo, A, Rosner, G, Sabatie, F, Salgado, C, Schumacher, Ra, Sharabian, Yg, Skorodumina, I, Smith, Gd, Sober, Di, Sokhan, D, Sparveris, N, Stepanyan, S, Strakovsky, Ii, Strauch, S, Taiuti, M, Ungaro, M, Voskanyan, H, Voutier, E, Wei, X, Wood, Mh, Zachariou, N, Zana, L, Zhang, J, and Zhao, Zw

Subjects
Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2017

12. Differential cross section measurements for γn→π-p above the first nucleon resonance region

Author

Mattione, Pt, Carman, Ds, Strakovsky, Ii, Workman, Rl, Kudryavtsev, Ae, Svarc, A, Tarasov, Ve, Adhikari, Kp, Adhikari, S, Adikaram, D, Akbar, Z, Anefalos Pereira, S, Ball, J, Baltzell, Na, Bashkanov, M, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, As, Boiarinov, S, Briscoe, Wj, Burkert, Vd, Cao, T, Celentano, A, Charles, G, Chetry, T, Ciullo, G, Clark, L, Cole, Pl, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Defurne, M, Deur, A, Djalali, C, Dugger, M, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Eugenio, P, Fedotov, G, Fersch, R, Filippi, A, Fleming, Ja, Fradi, A, Ghandilyan, Y, Gilfoyle, Gp, Giovanetti, Kl, Girod, Fx, Gleason, C, Golovatch, E, Gothe, Rw, Griffioen, Ka, Guidal, M, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Hicks, K, Hollis, G, Holtrop, M, Hughes, Sm, Ilieva, Y, Ireland, Dg, Ishkhanov, Bs, Isupov, El, Jenkins, D, Jiang, H, H. S., J, Joo, K, Joosten, S, Keller, D, Khachatryan, G, Khachatryan, M, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, Fj, Kubarovsky, V, Kuleshov, Sv, Lanza, L, Lenisa, P, Livingston, K, Macgregor, Ijd, Markov, N, Mckinnon, B, Meyer, Ca, Meziani, Ze, Mineeva, T, Mokeev, V, Montgomery, Ra, Movsisyan, A, Munoz Camacho, C, Murdoch, G, Nadel-Turonski, P, Net, La, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, Ai, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Phelps, W, Pisano, S, Pogorelko, O, Price, Jw, Procureur, S, Prok, Y, Protopopescu, D, Raue, Ba, Ripani, M, Ritchie, Bg, Rizzo, A, Rosner, G, Sabatie, F, Salgado, C, Schumacher, Ra, Sharabian, Yg, Simonyan, A, Skorodumina, I, Smith, Gd, Sokhan, D, Sparveris, N, Stankovic, I, Stepanyan, S, Strauch, S, Taiuti, M, Ungaro, M, Voskanyan, H, Voutier, E, Walford, Nk, Watts, D, Wei, X, Wood, Mh, Zachariou, N, Zhang, J, and Zhao, Zw

Subjects
Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2017

13. Measurements of ep→e′π+π-p′ cross sections with CLAS at 1.40 GeV<W<2.0 GeV and 2.0 GeV2<Q2<5.0 GeV2

Author

Isupov, El, Burkert, Vd, Carman, Ds, Gothe, Rw, Hicks, K, Ishkhanov, Bs, Mokeev, Vi, Adhikari, Kp, Adhikari, S, Adikaram, D, Akbar, Z, Amaryan, Mj, Anefalos Pereira, S, Avakian, H, Ball, J, Baltzell, Na, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, As, Briscoe, Wj, Brooks, Wk, Bultmann, S, Cao, T, Celentano, A, Charles, G, Chetry, T, Ciullo, G, Clark, L, Colaneri, L, Cole, Pl, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Dupre, R, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fersch, R, Filippi, A, Fleming, Ja, Forest, Ta, Garcon, M, Gavalian, G, Ghandilyan, Y, Gilfoyle, Gp, Giovanetti, Kl, Girod, Fx, Glazier, Di, Gleason, C, Golovatch, E, Griffioen, Ka, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Holtrop, M, Hughes, Sm, Ilieva, Y, Ireland, Dg, Jenkins, D, Jiang, H, Joo, K, Joosten, S, Keller, D, Khachatryan, G, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, Fj, Kubarovsky, V, Kuleshov, Sv, Kunkel, M, Lanza, L, Lenisa, P, Livingston, K, H. Y., L, Macgregor, Ijd, Markov, N, Mckinnon, B, Mineeva, T, Mirazita, M, Montgomery, Ra, Movsisyan, A, Munevar, E, Munoz Camacho, C, Murdoch, G, Nadel-Turonski, P, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Phelps, W, Pogorelko, O, Price, Jw, Procureur, S, Prok, Y, Protopopescu, D, Raue, Ba, Ripani, M, Riser, D, Ritchie, Bg, Rizzo, A, Sabatie, F, Salgado, C, Schumacher, Ra, Sharabian, Yg, Simonyan, A, Skorodumina, I, Smith, Gd, Sokhan, D, Sparveris, N, Stankovic, I, Strakovsky, Ii, Strauch, S, Taiuti, M, Tian, Y, Torayev, B, Trivedi, A, Ungaro, M, Voskanyan, H, Voutier, E, Walford, Nk, Wei, X, Wood, Mh, Zachariou, N, and Zhang, J

Subjects
Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2017

14. Beam-Target Helicity Asymmetry for γ → n → →π-p in the N∗ Resonance Region

Author

Ho, D, Peng, P, Bass, C, Collins, P, D'Angelo, A, Deur, A, Fleming, J, Hanretty, C, Kageya, T, Khandaker, M, Klein, Fj, Klempt, E, Laine, V, Lowry, Mm, Lu, H, Nepali, C, Nikonov, Va, O'Connell, T, Sandorfi, Am, Sarantsev, Av, Schumacher, Ra, Strakovsky, Ii, Svarc, A, Walford, Nk, Wei, X, Whisnant, Cs, Workman, Rl, Zonta, I, Adhikari, Kp, Adikaram, D, Akbar, Z, Amaryan, Mj, Anefalos Pereira, S, Avakian, H, Ball, J, Bashkanov, M, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, A, Briscoe, Wj, Burkert, Vd, Carman, Ds, Celentano, A, Charles, G, Chetry, T, Ciullo, G, Clark, L, Colaneri, L, Cole, Pl, Contalbrigo, M, Crede, V, Dashyan, N, De Sanctis, E, De Vita, R, Djalali, C, Dupre, R, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fegan, S, Fersch, R, Filippi, A, Fradi, A, Ghandilyan, Y, Gilfoyle, Gp, Girod, Fx, Glazier, Di, Gleason, C, Gohn, W, Golovatch, E, Gothe, Rw, Griffioen, Ka, Guidal, M, Guo, L, Hakobyan, H, Harrison, N, Hattawy, M, Hicks, K, Holtrop, M, Hughes, Sm, Ilieva, Y, Ireland, Dg, Ishkhanov, Bs, Isupov, El, Jenkins, D, Jiang, H, H. S., J, Joo, K, Joosten, S, Keller, D, Khachatryan, G, Kim, A, Kim, W, Klein, A, Kubarovsky, V, Kuleshov, Sv, Lanza, L, Lenisa, P, Livingston, K, Macgregor, Ijd, Markov, N, Mckinnon, B, Mineeva, T, Mokeev, V, Montgomery, Ra, Movsisyan, A, Munoz Camacho, C, Murdoch, G, Niccolai, S, Niculescu, G, Osipenko, M, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Phelps, W, Pogorelko, O, Price, Jw, Procureur, S, Protopopescu, D, Ripani, M, Riser, D, Ritchie, Bg, Rizzo, A, Rosner, G, Sabatie, F, Salgado, C, Sharabian, Yg, Skorodumina, I, Smith, Gd, Sober, Di, Sokhan, D, Sparveris, N, Strauch, S, Tian, Y, Torayev, B, Ungaro, M, Voskanyan, H, Voutier, E, Watts, Dp, Wood, Mh, Zachariou, N, Zhang, J, and Zhao, Zw

Subjects
Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2017

15. Target and beam-target spin asymmetries in exclusive pion electroproduction for Q2>1 GeV2. II. ep→eπ0p

Author

Bosted, P. E., Kim, A., Adhikari, K. P., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Avakian, H., Badui, R. A., Ball, J., Balossino, I., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brooks, W. K., 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., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fegan, S., Fersch, R., Filippi, A., Fleming, J. A., Forest, T. A., Fradi, A., Ghandilyan, Y., Gilfoyle, G. P., Girod, F. X., Glazier, D. I., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Hakobyan, H., Guo, L., Hafidi, K., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Hollis, G., Holtrop, M., Hughes, S. M., Ireland, D. G., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joo, K., Keller, D., Khachatryan, G., Khandaker, M., Kim, W., Klei, A., Klein, F. J., Koirala, S., Kubarovsky, V., Kuhn, S. E., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McCracken, M. E., McKinnon, B., Mineeva, T., Mirazita, M., Mokeev, V. I., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Puckett, A. J. R., Raue, B. A., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Saini, M. S., Schumacher, R. A., Seder, E., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Stoler, P., 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., Zhao, Z. W., and Zonta, I.

Subjects
Nuclear and High Energy Physics, Economica, Socio-culturale, High Energy Physics::Experiment, RESONANCE, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive \ud π\ud 0\ud electroproduction reaction \ud γ\ud ∗\ud p\ud →\ud p\ud π\ud 0\ud , expanding an analysis of the \ud γ\ud ∗\ud p\ud →\ud n\ud π\ud +\ud reaction from the same experiment. The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The kinematic ranges covered are \ud 1.1\ud

Published
2017

16. Determination of the proton spin structure functions for 0.05 < Q^(2) < 5 GeV^(2) using CLAS

Author

Fersch, Rg, Guler, N, Bosted, P, Deur, A, Griffioen, K, Keith, C, Kuhn, Se, Minehart, R, Prok, Y, Adhikari, Kp, Adhikari, S, Akbar, Z, Amaryan, Mj, Anefalos Pereira, S, Asryan, G, Avakian, H, Ball, J, Balossino, I, Baltzell, Na, Battaglieri, M, Bedlinskiy, I, Biselli, As, Briscoe, Wj, Brooks, Wk, Bultmann, S, Burkert, Vd, Thanh Cao, F, Carman, Ds, Careccia, S, Celentano, A, Chandavar, S, Charles, G, Chetry, T, Ciullo, G, Clark, L, Colaneri, L, Cole, Pl, Compton, N, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Djalali, C, Dodge, Ge, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fanchini, E, Fedotov, G, Filippi, A, Fleming, Ja, Forest, Ta, Garcon, M, Gavalian, G, Ghandilyan, Y, Gilfoyle, Gp, Giovanetti, Kl, Girod, Fx, Gleason, C, Golovatch, E, Gothe, Rw, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Hicks, K, Holtrop, M, Hughes, Sm, Ilieva, Y, Ireland, Dg, Ishkhanov, Bs, Isupov, El, Jenkins, D, Joo, K, Keller, D, Khachatryan, G, Khachatryan, M, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, Fj, Kubarovsky, V, Lagerquist, Vg, Lanza, L, Lenisa, P, Livingston, K, H. Y., L, Mckinnon, B, Meyer, Ca, Mirazita, M, Mokeev, V, Montgomery, Ra, Movsisyan, A, Munoz Camacho, C, Murdoch, G, Nadel-Turonski, P, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, Ai, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Phelps, W, Pierce, J, Pisano, S, Pogorelko, O, Price, Jw, Protopopescu, D, Raue, Ba, Ripani, M, Riser, D, Rizzo, A, Rosner, G, Rossi, P, Roy, P, Sabatie, F, Salgado, C, Schumacher, Ra, Sharabian, Yg, Simonyan, A, Skorodumina, I, Smith, Gd, Sokhan, D, Sparveris, N, Stankovic, I, Stepanyan, S, Strakovsky, Ii, Strauch, S, Taiuti, M, Tian, Y, Torayev, B, Ungaro, M, Voskanyan, H, Voutier, E, Walford, Nk, Watts, Dp, Wei, X, Weinstein, Lb, Zachariou, N, and Zhang, J

Subjects
Nuclear and High Energy Physics, Lepton Induced Nuclear Reactions, Polarized Phenomena, Socio-culturale, Proton Quark Model, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2017

17. Exclusive η electroproduction at W>2 GeV with CLAS and transversity generalized parton distributions

Author

Bedlinskiy, I., Kubarovsky, V., Stoler, P., Adhikari, K. P., Akbar, Z., Anefalos Pereira, S., Avakian, H., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Burkert, V. D., Cao, T., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., Alaoui, A. El, Fassi, L. El, Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Forest, T. A., Garçon, M., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Hicks, K., Hughes, S. M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joo, K., Joosten, S., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Kuhn, S. E., Kuleshov, S. V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Markov, N., McKinnon, B., Meziani, Z. E., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Net, L. A., Ni, A., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Puckett, A. J. R., Raue, B. A., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Saini, M. S., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Turisini, M., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Yurov, M., Zachariou, N., Zhang, J., and Zonta, I.

Subjects
SCATTERING, SYSTEM, Nuclear and High Energy Physics, Economica, Socio-culturale, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

The cross section of the exclusive \ud η\ud electroproduction reaction \ud e\ud p\ud →\ud e\ud ′\ud p\ud ′\ud η\ud was measured at Jefferson Laboratory with a 5.75 GeV electron beam and the CLAS detector. Differential cross sections \ud d\ud 4\ud σ\ud /\ud d\ud t\ud d\ud Q\ud 2\ud d\ud x\ud B\ud d\ud ϕ\ud η\ud and structure functions \ud σ\ud U\ud =\ud σ\ud T\ud +\ud ε\ud σ\ud L\ud ,\ud σ\ud T\ud T\ud , and \ud σ\ud L\ud T\ud , as functions of \ud t\ud , were obtained over a wide range of \ud Q\ud 2\ud and \ud x\ud B\ud . The \ud η\ud structure functions are compared with those previously measured for \ud π\ud 0\ud at the same kinematics. At low \ud t\ud , both \ud π\ud 0\ud and \ud η\ud are described reasonably well by generalized parton distributions (GPDs) in which chiral-odd transversity GPDs are dominant. The \ud π\ud 0\ud and \ud η\ud data, when taken together, can facilitate the flavor decomposition of the transversity GPDs.

Published
2017

18. First Exclusive Measurement of Deeply Virtual Compton Scattering off $^4$He: Toward the 3D Tomography of Nuclei

Author

Hattawy, M., Baltzell, N. A., Dupré, R., Hafidi, K., Stepanyan, S., Bültmann, S., De Vita, R., El Alaoui, A., El Fassi, L., Egiyan, H., Girod, F. X., Guidal, M., Jenkins, D., Liuti, S., Perrin, Y., Torayev, B., Voutier, E., Adhikari, K. P., Adhikari, S., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Armstrong, Whitney R., Avakian, H., Ball, J., Bashkanov, M., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Thanh Cao, Frank, Carman, D. S., Celentano, A., 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 Sanctis, E., Deur, A., Djalali, C., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Fersch, R., Filippi, A., Fleming, J. A., Forest, T. A., Fradi, A., Garçon, M., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Gleason, C., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guo, L., Hakobyan, H., Hanretty, C., Harrison, N., Heddle, D., Hicks, K., Holtrop, M., Hughes, S. M., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jiang, H., Joo, K., Joosten, S., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McCracken, M. E., McKinnon, B., Meyer, C. A., Meziani, Z. E., Mineeva, T., Mirazita, M., Mokeev, V., Montgomery, R. A., Moutarde, H., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Net, L. A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Ripani, M., Ritchie, B. G., Rizzo, A., Rosner, G., Rossi, P., Sabatié, F., Salgado, C., Schumacher, R. A., Seder, E., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Strauch, S., Taiuti, M., Ungaro, M., Voskanyan, H., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., Zhao, Z. W., 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), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), 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, 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 ), Laboratoire de Physique Subatomique et de Cosmologie ( LPSC ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), 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 polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), 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), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and Université Grenoble Alpes (UGA)

Subjects
Nuclear Theory, FOS: Physical sciences, Socio-culturale, Bethe-Heitler, helium, Newport News CEBAF Linac, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], PHOTONS, High Energy Physics - Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare, High Energy Physics - Experiment (hep-ex), [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], GENERALIZED PARTON DISTRIBUTIONS, deeply virtual Compton scattering, CLAS, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment (nucl-ex), [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], electron: beam, Nuclear Experiment, mesons, nucleus: recoil, Generalized parton distributions, electroproduction, photons, mesons, Bjorken, ELECTROPRODUCTION, Compton scattering: form factor, helicity, time projection chamber, calorimeter: electromagnetic, 6 GeV, kinematics, coherent interaction, Physics::Accelerator Physics, particle identification, momentum: low, experimental results, Jefferson Lab
Abstract

We report on the first measurement of the beam-spin asymmetry in the exclusive process of coherent deeply virtual Compton scattering off a nucleus. The experiment uses the 6 GeV electron beam from the Continuous Electron Beam Accelerator Facility (CEBAF) accelerator at Jefferson Lab incident on a pressurized \ud 4\ud He\ud gaseous target placed in front of the CEBAF Large Acceptance Spectrometer (CLAS). The scattered electron is detected by CLAS and the photon by a dedicated electromagnetic calorimeter at forward angles. To ensure the exclusivity of the process, a specially designed radial time projection chamber is used to detect the recoiling \ud 4\ud He\ud nuclei. We measure beam-spin asymmetries larger than those observed on the free proton in the same kinematic domain. From these, we are able to extract, in a model-independent way, the real and imaginary parts of the only \ud 4\ud He\ud Compton form factor, \ud H\ud A\ud . This first measurement of coherent deeply virtual Compton scattering on the \ud 4\ud He\ud nucleus, with a fully exclusive final state via nuclear recoil tagging, leads the way toward 3D imaging of the partonic structure of nuclei.

Published
2017

19. Target and beam-target spin asymmetries in exclusive π+ and π- Electroproduction with 1.6- to 5.7-GeV electrons

Author

Bosted, P, Biselli, A, Careccia, S, Dodge, G, Fersch, R, Guler, N, Kuhn, S, Pierce, J, Prok, Y, Zheng, X, Adhikari, K, Adikaram, D, Akbar, Z, Amaryan, M, Anefalos Pereira, S, Asryan, G, Avakian, H, Badui, R, Ball, J, Baltzell, N, Battaglieri, M, Batourine, V, Bedlinskiy, I, Boiarinov, S, Briscoe, W, Bultmann, S, Burkert, V, Cao, T, Carman, D, Celentano, A, Chandavar, S, Charles, G, Chetry, T, Ciullo, G, Clark, L, Colaneri, L, Cole, P, 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, Forest, T, Fradi, A, Garcon, M, Gevorgyan, N, Ghandilyan, Y, Gilfoyle, G, Giovanetti, K, Girod, F, Gleason, C, Gohn, W, Golovatch, E, Gothe, R, Griffioen, K, Guo, L, Hafidi, K, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Hicks, K, Holtrop, M, Hughes, S, Ilieva, Y, Ireland, D, Ishkhanov, B, Isupov, E, Jenkins, D, Jiang, H, Hs, J, Joo, K, Joosten, S, Keller, D, Khandaker, M, Kim, W, Klein, A, Klein, Kubarovsky, F, V, Kuleshov, S, Lanza, L, Lenisa, P, Livingston, K, Hy, L, Macgregor, I, Markov, N, Mccracken, M, Mckinnon, B, Meyer, C, Minehart, R, Mirazita, M, Mokeev, V, Movsisyan, A, Munevar, E, Munoz Camacho, C, Nadel Turonski, P, Net, L, Ni, A, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, A, Paremuzyan, R, Park, K, Pasyuk, E, Peng, P, Phelps, W, Pisano, S, Pogorelko, O, Price, J, Procureur, S, Protopopescu, D, Puckett, A, Raue, B, Ripani, M, Rizzo, A, Rosner, G, Rossi, P, Roy, P, Sabatie, F, Salgado, C, Schumacher, R, Seder, E, Sharabian, Y, Simonyan, A, Skorodumina, I, Smith, G, Sparveris, N, Stankovic, I, Stepanyan, S, Strakovsky, I, Strauch, S, Sytnik, V, Taiuti, M, Tian, Y, Torayev, B, Ungaro, M, Voskanyan, H, Voutier, E, Walford, N, Watts, D, Wei, X, Weinstein, L, Wood, M, Zachariou, N, Zana, L, Zhang, J, Zhao, Z, and Zonta, I

Subjects
GEV2, DEUTERONS, CLAS, CHARGED PIONS, NUCLEON, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2016

20. Measurement of target and double-spin asymmetries for the e p → eπ+(n) reaction in the nucleon resonance region at low Q2

Author

Zheng, X., Adhikari, K. P., Bosted, P., Deur, A., Drozdov, V., El Fassi, L., Kang, Hyekoo, Kovacs, K., Kuhn, S., Long, E., Phillips, S. K., Ripani, M., Slifer, K., Smith, L. C., 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., Biselli, A. S., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chen, J.-P., Chetry, T., Choi, Seonho, Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., 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., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovach, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hanretty, C., Harrison, N., Hattawy, M., 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., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I.J.D., Markov, N., McKinnon, B., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Net, L. A., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J. W., Puckett, A. J. R., Raue, B. A., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., and Zonta, I.

Subjects
Nuclear and High Energy Physics, Economica, Socio-culturale, High Energy Physics::Experiment, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

We report measurements of target- and double-spin asymmetries for the exclusive channel ep → eπ+(n) in\ud the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These\ud asymmetries were extracted from data obtained using a longitudinally polarized NH3 target and a longitudinally\ud polarized electron beam with energies 1.1, 1.3, 2.0, 2.3, and 3.0 GeV. The new results are consistent with previous\ud CLAS publications but are extended to a low Q2 range from 0.0065 to 0.35 (GeV/c)\ud 2. The Q2 access was made\ud possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low\ud as 6◦. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis\ud prediction from SAID, and the dynamic model DMT. In many kinematic regions our results, in particular results\ud on the target asymmetry, help to constrain the polarization-dependent components of these models.

Published
2016

21. Photoproduction of Λ and Σ0 hyperons using linearly polarized photons

Author

Paterson, C, Ireland, D, Livingston, K, Mckinnon, B, Adhikari, K, Adikaram, D, Akbar, Z, Amaryan, M, Anefalos Pereira, S, Badui, R, Ball, J, Baltzell, N, Battaglieri, M, Bedlinskiy, I, Biselli, A, Briscoe, W, Brooks, W, Burkert, V, Carman, D, Celentano, A, Chetry, T, Ciullo, G, Clark, L, Colaneri, L, Cole, P, Compton, N, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, De Vita, R, Deur, A, Djalali, C, Dugger, M, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Fanchini, E, Fedotov, G, Filippi, A, Fleming, J, Gevorgyan, N, Ghandilyan, Y, Gilfoyle, G, Giovanetti, K, Girod, F, Glazier, D, Gleason, C, Gothe, R, Griffioen, K, Guo, L, Hafidi, K, Harrison, N, Hattawy, M, Hicks, K, Holtrop, M, Hughes, S, Ilieva, Y, Ishkhanov, B, Isupov, E, Jenkins, D, Jiang, H, Joo, K, Keller, D, Khachatryan, G, Khandaker, M, Kim, W, Klein, F, Kubarovsky, V, Kuleshov, S, Lanza, L, Lenisa, P, Hy, L, Macgregor, I, Markov, N, Mattione, P, Mayer, C, Mccracken, M, Mokeev, V, Movsisyan, A, Munevar, E, Munoz Camacho, C, Nadel Turonski, P, Net, L, Ni, A, Niccolai, S, Niculescu, G, Osipenko, M, Ostrovidov, A, Paremuzyan, R, Park, K, Pasyuk, E, Peng, P, Pisano, S, Pogorelko, O, Price, J, Prok, Y, Protopopescu, D, Puckett, A, Raue, B, Ripani, M, Ritchie, B, Rizzo, A, Rosner, G, Roy, P, Sabatie, F, Salgado, C, Schumacher, R, Seder, E, Sharabian, Y, Skorodumina, I, Smith, G, Sober, D, Sokhan, D, Sparveris, N, Strakovsky, I, Strauch, S, Sytnik, V, Taiuti, M, Torayev, B, Tucker, R, Ungaro, M, Voskanyan, H, Voutier, E, Walford, N, Watts, D, Wei, X, Zachariou, N, Zana, L, Zhang, J, and Zonta, I

Subjects
BREMSSTRAHLUNG, BEAM, OBSERVABLES, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2016

22. Strangeness Suppression of q(q)over-bar Creation Observed in Exclusive Reactions

Author

Mestayer, M, Park, K, Adhikari, K, Aghasyan, M, Pereira, S, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, A, Boiarinov, S, Briscoe, W, Brooks, W, Burkert, V, Carman, D, Celentano, A, Chandavar, S, Charles, G, Colaneri, L, Cole, P, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, Deur, A, Djalali, C, Doughty, D, Dupre, R, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fleming, J, Forest, T, Garillon, B, Garcn, M, Ghandilyan, Y, Gilfoyle, G, Giovanetti, K, Girod, F, Goetz, J, Golovatch, E, Gothe, R, Griffioen, K, Guegan, B, Guidal, M, Hakobyan, H, Hanretty, C, Hattawy, M, Holtrop, M, Hughes, S, Hyde, C, Ilieva, Y, Ireland, D, Jiang, H, Jo, H, Joo, K, Keller, D, Khandaker, M, Kim, A, Kim, W, Koirala, S, Kubarovsky, V, Kuleshov, S, Lenisa, P, Levine, W, Livingston, K, Lu, H, Macgregor, I, Mayer, M, Mckinnon, B, Meyer, C, Mirazita, M, Mokeev, V, Montgomery, R, Moody, C, Moutarde, H, Movsisyan, A, Camacho, C, Nadel Turonski, P, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, A, Pappalardo, L, Paremuzyan, R, Peng, P, Phelps, W, Pisano, S, Pogorelko, O, Pozdniakov, S, Price, J, Protopopescu, D, Puckett, A, Raue, B, Rimal, D, Ripani, M, Rizzo, A, Rosner, G, Roy, P, Sabatie, F, Saini, M, Schott, D, Schumacher, R, Simonyan, A, Sokhan, D, Strauch, S, Sytnik, V, Tang, W, Tian, Y, Ungaro, M, Vernarsky, B, Vlassov, A, Voskanyan, H, Voutier, E, Walford, N, Watts, D, Wei, X, Weinstein, L, Wood, M, Zachariou, N, Zhang, J, Zhao, Z, and Zonta, I

Subjects
FLUX-TUBE MODEL, PARTICLE-PRODUCTION, QUARK SUPPRESSION, FLAVOR ASYMMETRY, E&E ANNIHILATION, HIGH-ENERGY, SCATTERING, VERTICES, SEA, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2014

23. Measurement of the structure function of the nearly free neutron using spectator tagging in inelastic H-2(e, e ' p(s)) X scattering with CLAS

Author

Tkachenko, S, Baillie, N, Kuhn S, E, Zhang, J, Arrington, J, Bosted, P, Bueltmann, S, Christy M, E, Fenker, H, Griffioen K, A, Kalantarians, N, Keppel C, E, Melnitchouk, W, Tvaskis, V, Adhikari K, P, Aghasyan, M, Amaryan M, J, Pereira S, A, Avakian, H, Ball, J, Baltzell N, A, Battaglieri, M, Bedlinskiy, I, Biselli A, S, Briscoe W, J, Brooks W, K, Burkert V, D, Carman D, S, Celentano, A, Chandavar, S, Charles, G, Cole P, L, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Dodge G, E, Doughty, D, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fleming J, A, Garillon, B, Gevorgyan, N, Ghandilyan, Y, Gilfoyle G, P, Giovanetti K, L, Girod F, X, Goetz J, T, Golovatch, E, Gothe R, W, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Hattawy, M, Hicks, K, Ho, D, Holtrop, M, Hyde C, E, Ilieva, Y, Ireland D, G, Ishkhanov B, S, Jo H, S, Keller, D, Khandaker, M, Kim, A, Kim, W, King P, M, Klein, A, Klein F, J, Koirala, S, Kubarovsky, V, Kuleshov S, V, Lenisa, P, Lewis, S, Livingston, K, Lu, H, Maccormick, M, MacGregor I. J, D, Markov, N, Mayer, M, Mckinnon, B, Mineeva, T, Mirazita, M, Mokeev, V, Montgomery R, A, Moutarde, H, Camacho C, M, Nadel Turonski, P, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Pappalardo L, L, Paremuzyan, R, Park, K, Pasyuk, E, Phillips J, J, Pisano, S, Pogorelko, O, Pozdniakov, S, Price J, W, Procureur, S, Protopopescu, D, Puckett A. J, R, Rimal, D, Ripani, M, Rizzo, A, Rosner, G, Rossi, P, Roy, P, Sabatie, F, Schott, D, Schumacher R, A, Seder, E, Senderovich, I, Sharabian Y, G, Simonyan, A, Smith G, D, Sober D, I, Sokhan, D, Stepanyan, S, Stepanyan S, S, Strauch, S, Tang, W, Ungaro, M, Vlassov A, V, Voskanyan, H, Voutier, E, Walford N, K, Watts, D, Wei, X, Weinstein L, B, Wood M, H, Zana, L, and Zonta, I

Subjects
Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2014

24. Beam asymmetry Sigma for pi(+) and pi(0) photoproduction on the proton for photon energies from 1.102 to 1.862 GeV

Author

Dugger, M, Ritchie B, G, Collins, P, Pasyuk, E, Briscoe W, J, Strakovsky I, I, Workman R, L, Azimov, Y, Adhikari K, P, Adikaram, D, Aghasyan, M, Amaryan M, J, Anderson M, D, Pereira S, A, Avakian, H, Ball, J, Baltzell N, A, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli A, S, Boiarinov, S, Burkert V, D, Carman D, S, Celentano, A, Chandavar, S, Cole P, L, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Eugenio, P, Fedotov, G, Fegan, S, Fleming J, A, Gevorgyan, N, Gilfoyle G, P, Giovanetti K, L, Girod F, X, Goetz J, T, Gohn, W, Golovatch, E, Gothe R, W, Griffioen K, A, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Heddle, D, Hicks, K, Ho, D, Holtrop, M, Ilieva, Y, Ireland D, G, Ishkhanov B, S, Isupov E, L, Jo H, S, Joo, K, Keller, D, Khandaker, M, Kim, W, Klein, A, Klein F, J, Koirala, S, Kubarovsky, A, Kubarovsky, V, Kuleshov S, V, Lewis, S, Livingston, K, Lu H, Y, MacGregor I. J, D, Martinez, D, Mayer, M, Mckinnon, B, Mineeva, T, Mirazita, M, Mokeev, V, Montgomery R, A, Moutarde, H, Munevar, E, Camacho C, M, Nadel Turonski, P, Nepali C, S, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov A, I, Pappalardo L, L, Paremuzyan, R, Park, K, Park, S, Phelps, E, Phillips J, J, Pisano, S, Pogorelko, O, Pozdniakov, S, Price J, W, Procureur, S, Prok, Y, Protopopescu, D, Raue B, A, Rimal, D, Ripani, M, Rosner, G, Rossi, P, Sabatie, F, Saini M, S, Salgado, C, Schott, D, Schumacher R, A, Seder, E, Seraydaryan, H, Sharabian Y, G, Smith G, D, Sober D, I, Sokhan, D, Stepanyan S, S, Stoler, P, Strauch, S, Null, T, Null, M, Tang, W, Tian, Y, Tkachenko, S, Torayev, B, Voskanyan, H, Voutier, E, Walford N, K, Watts D, P, Weygand D, P, Zachariou, N, L, Zhang, J, Zhao Z, W, and Zonta, I

Subjects
POSITIVE PION-PHOTOPRODUCTION, RESONANCE REGION, POLARIZED PHOTONS, CROSS-SECTION, PI-0 MESONS, CLAS, PARAMETERS, SYSTEM, PI0, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2013

25. Differential photoproduction cross sections of the Sigma(0)(1385), Lambda(1405), and Lambda(1520)

Author

Moriya, K, Schumacher R, A, Adhikari K, P, Adikaram, D, Aghasyan, M, Anderson, M, Pereira, S, Anefalos Ball, J, Baltzell N, A, Battaglieri, M, Batourine, V, Bedlinskiy, I, Bellis, M, Biselli A, S, Bono, J, Boiarinov, S, Briscoe W, J, Burkert V, D, Carman D, S, Celentano, A, Chandavar, S, Charles, G, Cole, P, Collins, P, Crede, V, D'Angelo, A, Dashyan, N, De Sanctis, E, De Vita, R, Deur, A, Dey, B, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, El Fassi, L, Eugenio, P, Fedotov, G, Fegan, S, Fersch, R, Fleming J, A, Gevorgyan, N, Gilfoyle G, P, Giovanetti K, L, Girod, F, Null, X, Goetz J, T, Gohn, W, Golovatch, E, Gothe R, W, Griffioen K, A, Guidal, M, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Heddle, D, Hicks, K, Ho, D, Holtrop, M, Hyde C, E, Ilieva, Y, Ireland D, G, Ishkhanov B, S, Isupov E, L, Jo, H, Null, S, Keller, D, Khandaker, M, Khetarpal, P, Kim, A, Kim, W, Klein, A, Klein, F, Null, J, Koirala, S, Kubarovsky, A, Kubarovsky, V, Kuleshov, S, Null, V, Kvaltine, N, Null, D, Livingston, K, Lu, H, Null, Y, Macgregor, I, Markov, N, Mayer, M, Mccracken, M, Mckinnon, B, Mestayer M, D, Meyer C, A, Mirazita, M, Mineeva, T, Mokeev, V, Montgomery R, A, Munevar, E, Camacho, C, Munoz Nadel Turonski, P, Nasseripour, R, Nepali C, S, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, A, Null, I, Pappalardo, L, Null, L, Paremuzyan, R, Park, K, Park, S, Pasyuk, E, Phelps, E, Phillips, J, Pisano, S, Pivnyuk, N, Pogorelko, O, Pozdniakov, S, Price, J, Null, W, Procureur, S, Protopopescu, D, Rimal, D, Ripani, M, Ritchie B, G, Rosner, G, Rossi, P, Sabatie, F, Saini M, S, Salgado, C, Schott, D, Seder, E, Seraydaryan, H, Sharabian Y, G, Smith E, S, Smith, G, Sober, D, Stepanyan S, S, Stepanyan, S, Stoler, P, Strakovsky I, I, Strauch, S, Taiuti, M, Tang, W, Taylor, S, Taylor C, E, Tian Ye Tkachenko, S, Torayev, B, Ungaro, M, Vernarsky, B, Vlassov A, V, Voskanyan, H, Voutier, E, Walford N, K, Watts D, P, Weygand D, P, Williams, M, Zachariou, N, Zana, L, Zhang, J, Zhao Z, W, and Zonta, I

Subjects
STATES, SCATTERING, HYPERON, MASSES, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2013

26. Cross sections for the γp→K*+Λ and γp→K*+Σ0 reactions measured at CLAS

Author

Tang, W., Hicks, K., Keller, D., Kim, S. H., Kim, H. C., Adhikari, K. P., Aghasyan, M., Amaryan, M. J., Anderson, M. D., Anefalos Pereira, S., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Bono, J., Boiarinov, S., Briscoe, W. J., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Cole, P. L., Collins, P., Contalbrigo, M., Cortes, O., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., Alaoui, A. El, Fassi, L. El, Eugenio, P., Fedotov, G., Fegan, S., Fleming, J. A., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Heddle, D., Ho, D., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jo, H. S., Joo, K., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, F. J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuleshov, S. V., Livingston, K., Lu, H. Y., MacGregor, I.J.D., Mao, Y., Markov, N., Martinez, D., Mayer, M., McKinnon, B., Meyer, C. A., Mokeev, V., Moutarde, H., Munevar, E., Munoz Camacho, C., Nadel-Turonski, P., Nepali, C. S., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Pappalardo, L. L., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Phelps, E., Phillips, J. J., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Puckett, A. J. R., Raue, B. A., Ripani, M., Rimal, D., Ritchie, B. G., Rosner, G., Rossi, P., Sabatié, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seraydaryan, H., Sharabian, Y. G., Smith, G.D., Sober, D. I., Sokhan, Daria, Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taylor, C. E., Tian, Ye, Tkachenko, S., Torayev, B., Ungaro, M., Vernarsky, B., Vlassov, A. V., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Weinstein, L. B., Weygand, D. P., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., Zhao, Z. W., and Zonta, I.

Subjects
SYSTEM, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

The first high-statistics cross sections for the reactions γp→K*+Λ and γp→K*+Σ0 were measured using the CLAS detector at photon energies between threshold and 3.9 GeV at the Thomas Jefferson National Accelerator Facility. Differential cross sections are presented over the full range of the center-of-mass angles, and then fitted to Legendre polynomials to extract the total cross section. Results for the K*+Λ final state are compared with two different calculations in an isobar and a Regge model, respectively. Theoretical calculations significantly underestimate the K*+Λ total cross sections between 2.1 and 2.6 GeV, but are in better agreement with present data at higher photon energies.

Published
2013

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

Author

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

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

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

Published
2013

28. Demonstration of a novel technique to measure two-photon exchange effects in elastic e^{±}p scattering

Author

Moteabbed, M, Niroula, M, Raue, B, Weinstein, L, Adikaram, D, Arrington, J, Brooks, W, Lachniet, J, Rimal, D, Ungaro, M, Afanasev, A, Adhikari, K, Aghasyan, M, Amaryan, M, Pereira, S, Avakian, H, Ball, J, Baltzell, N, Battaglieri, M, Batourine, V, Bedlinskiy, I, Bennett, R, Biselli, A, Bono, J, Boiarinov, S, Briscoe, W, Burkert, V, Carman, D, Celentano, A, Chandavar, S, Cole, P, Collins, P, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, El Fassi, L, Eugenio, P, Fedotov, G, Fegan, S, Fersch, R, Fleming, J, Gevorgyan, N, Gilfoyle, G, Giovanetti, K, Girod, F, Goetz, J, Gohn, W, Golovatch, E, Gothe, R, Griffioen, K, Guidal, M, Guler, N, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Heddle, D, Hicks, K, Ho, D, Holtrop, M, Hyde, C, Ilieva, Y, Ireland, D, Ishkhanov, B, Isupov, E, Jo, H, Joo, K, Keller, D, Khandaker, M, Kim, A, Klein, F, Koirala, S, Kubarovsky, A, Kubarovsky, V, Kuhn, S, Kuleshov, S, Lewis, S, Lu, H, Maccormick, M, Macgregor, I, Martinez, D, Mayer, M, Mckinnon, B, Mineeva, T, Mirazita, M, Mokeev, V, Montgomery, R, Moriya, K, Moutarde, H, Munevar, E, Camacho, C, Nadel Turonski, P, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, A, Pappalardo, L, Paremuzyan, R, Park, K, Park, S, Phelps, E, Phillips, J, Pisano, S, Pogorelko, O, Pozdniakov, S, Price, J, Procureur, S, Protopopescu, D, Puckett, A, Ripani, M, Rosner, G, Rossi, P, Sabatie, F, Saini, M, Salgado, C, Schott, D, Schumacher, R, Seder, E, Seraydaryan, H, Sharabian, Y, Smith, E, Smith, G, Sober, D, Sokhan, D, Stepanyan, S, Strauch, S, Tang, W, Taylor, C, Tian, Y, Tkachenko, S, Voskanyan, H, Voutier, E, Walford, N, Wood, M, Zachariou, N, Zana, L, Zhang, J, Zhao, Z, and Zonta, I

Subjects
ELECTRON-PROTON SCATTERING, ELECTROMAGNETIC FORM-FACTORS, POSITRON-PROTON, CLAS, SYSTEM, EP, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2013

29. Comparison of forward and backward pp pair knockout in He-3(e,e'pp)n

Author

Baghdasaryan, H., Weinstein, L. B., Laget, J. M., Adhikari, K. P., Aghasyan, M., Amaryan, M. J., Anghinolfi, M., Ball, J., Battaglieri, M., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Cole, P. L., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Sanctis, E., De Vita, R., Djalali, C., Dodge, G. E., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Fedotov, G., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gohn, W., Gothe, R. W., Griffioen, K. A., Guegan, B., Guidal, M., Hafidi, K., Hicks, K., Hyde, C. E., Ireland, D. G., Ishkhanov, B. S., Jenkins, D., Jo, H. S., Joo, K., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Kubarovsky, A., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kvaltine, N. D., Lu, H. Y., MacGregor, I. J. D., McKinnon, B., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Park, K., Park, S., Pisano, S., Pozdniakov, S., Procureur, S., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Rossi, P., Saini, M. S., Saylor, N. A., Schott, D., Schumacher, R. A., Seraydaryan, H., Smith, E. S., Sober, D. I., Sokan, D., Stepanyan, S. S., Stepanyan, S., Strauch, S., Taiuti, M., Tang, W., Tkachenko, S., Voskanyan, H., Voutier, E., Wood, M. H., Zana, L., and Zhao, B.

Subjects
MECHANISMS, DEUTERON, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2012

30. Measurement of exclusive π(0) electroproduction structure functions and their relationship to transverse generalized parton distributions

Author

Bedlinskiy, I, Kubarovsky, V, Niccolai, S, Stoler, P, Adhikari, K, Aghasyan, M, Amaryan, M, Anghinolfi, M, Avakian, H, Baghdasaryan, H, Ball, J, Baltzell, N, Battaglieri, M, Bennett, R, Biselli, A, Bookwalter, C, Boiarinov, S, Briscoe, W, Brooks, W, Burkert, V, Carman, D, Celentano, A, Chandavar, S, Charles, G, Contalbrigo, M, Crede, V, D'Angelo, A, Daniel, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fegan, S, Fleming, J, Forest, T, Fradi, A, Garcon, M, Gevorgyan, N, Giovanetti, K, Girod, F, Gohn, W, Gothe, R, Graham, L, Griffioen, K, Guegan, B, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Heddle, D, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, D, Ishkhanov, B, Isupov, E, Jo, H, Joo, K, Keller, D, Khandaker, M, Khetarpal, P, Kim, A, Kim, W, Klein, F, Koirala, S, Kubarovsky, A, Kuhn, S, Kuleshov, S, Kvaltine, N, Livingston, K, Lu, H, Macgregor, I, Mao, Y, Markov, N, Martinez, D, Mayer, M, Mckinnon, B, Meyer, C, Mineeva, T, Mirazita, M, Mokeev, V, Moutarde, H, Munevar, E, Camacho, C, Nadel Turonski, P, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, A, Pappalardo, L, Paremuzyan, R, Park, K, Park, S, Pasyuk, E, Pereira, S, Phelps, E, Pisano, S, Pogorelko, O, Pozdniakov, S, Price, J, Procureur, S, Prok, Y, Protopopescu, D, Puckett, A, Raue, B, Ricco, G, Rimal, D, Ripani, M, Rosner, G, Rossi, P, Sabatie, F, Saini, M, Salgado, C, Saylor, N, Schott, D, Schumacher, R, Seder, E, Seraydaryan, H, Sharabian, Y, Smith, G, Sober, D, Sokhan, D, Stepanyan, S, Strauch, S, Taiuti, M, Tang, W, Taylor, C, Tian, Y, Tkachenko, S, Ungaro, M, Vineyard, M, Vlassov, A, Voskanyan, H, Voutier, E, Walford, N, Watts, D, Weinstein, L, Weygand, D, Wood, M, Zachariou, N, Zhang, J, Zhao, Z, and Zonta, I

Subjects
PION ELECTROPRODUCTION, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

Exclusive π(0) electroproduction at a beam energy of 5.75 GeV has been measured with the Jefferson Lab CLAS spectrometer. Differential cross sections were measured at more than 1800 kinematic values in Q(2), x(B), t, and ϕ(π), in the Q(2) range from 1.0 to 4.6 GeV(2), -t up to 2 GeV(2), and x(B) from 0.1 to 0.58. Structure functions σ(T)+ϵσ(L), σ(TT), and σ(LT) were extracted as functions of t for each of 17 combinations of Q(2) and x(B). The data were compared directly with two handbag-based calculations including both longitudinal and transversity generalized parton distributions (GPDs). Inclusion of only longitudinal GPDs very strongly underestimates σ(T)+ϵσ(L) and fails to account for σ(TT) and σ(LT), while inclusion of transversity GPDs brings the calculations into substantially better agreement with the data. There is very strong sensitivity to the relative contributions of nucleon helicity-flip and helicity nonflip processes. The results confirm that exclusive π(0) electroproduction offers direct experimental access to the transversity GPDs.

Published
2012

31. Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2)

Author

Park, K., Gothe, R. W., Adhikari, K. P., Adikaram, D., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Bookwalter, C., Boiarinov, S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Cole, P. L., Contalbrigo, Marco, Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., Vita, R. D., Sanctis, E. D., Deur, A., Djalali, C., Doughty, D., Dupre, R., Alaoui, A. E., Fassi, L. E., Eugenio, P., Fedotov, G., Fradi, A., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Golovatch, E., Graham, L., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Heddle, D., Hicks, K., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., H. S., Jo, Joo, K., Kalantarians, N., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, A., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., H. Y., Lu, I. J. D., Markov, N., Mayer, M., Mckinnon, B., Mestayer, M. D., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Nadel Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, Luciano Libero, Paremuzyan, R., Park, S., Pereira, S. A., Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabatie, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Sokhan, D., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tian, Y., Tkachenko, S., Trivedi, A., Ungaro, M., Vernarsky, B., Vlassov, A. V., Voutier, E., Watts, D. P., Weygand, D. P., Wood, M. H., Zachariou, N., Zhao, B., and Zhao, Z. W.

Subjects
QUANTUM CHROMODYNAMICS, PI-0, PION ELECTROPRODUCTION, NUCLEONS, PROTON, PHOTOPRODUCTION, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2012

32. Upper limits for the photoproduction cross section for the Φ^{−−}(1860) pentaquark state off the deuteron

Author

Egiyan, H., Langheinrich, J., Gothe, R. W., Graham, L., Holtrop, M., Lu, H., Mattione, P., Mutchler, G., Park, K., Smith, E. S., Stepanyan, S., Zhao, Z. W., Adhikari, K. P., Aghasyan, M., Anghinolfi, M., Baghdasaryan, H., Ball, J., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Bookwalter, C., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Contalbrigo, M., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Dey, B., Dickson, R., Djalali, C., Doughty, D., Dupre, R., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fegan, S., Fradi, A., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Golovatch, E., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Gyurjyan, V., Hafidi, K., Hakobyan, H., Hanretty, C., Heddle, D., Hicks, K., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Jo, H. S., Joo, K., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuleshov, S. V., Livingston, K., MacGregor, I. J. D., Mao, Y., Mayer, M., McKinnon, B., Mokeev, V., Munevar, E., Nadel-Turonski, P., Ni, A., Niculescu, G., Ostrovidov, A. I., Paolone, M., Pappalardo, L., Paremuzyan, R., Park, S., Pasyuk, E., Pereira, S. Anefalos, Phelps, E., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabatie, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Sober, D. I., Stepanyan, S. S., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tedeschi, D. J., Ungaro, M., Voutier, E., Watts, D. P., Weinstein, L. B., Weygand, D. P., Wood, M. H., Zachariou, N., Zana, L., and Zhao, B.

Subjects
DEEP-INELASTIC SCATTERING, BARYONS, XI-PI, SEARCH, CLAS, HERA, DETECTOR, DECAYS, SYSTEM, LEP, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2012

33. Experimental study of the P-11(1440) and D-13(1520) resonances from the CLAS data on ep -> e 'pi(+)pi(-)p

Author

Mokeev, V. I., Burkert, V. D., Elouadrhiri, L., Fedotov, G. V., Golovatch, E. N., Gothe, R. W., Ishkhanov, B. S., Isupov, E. L., Adhikari, K. P., Aghasyan, M., Anghinolfi, M., Avakian, H., Baghdasaryan, H., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Bookwalter, C., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Carman, D. S., Celentano, A., Charles, G., Cole, P. L., Contalbrigo, Marco, Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., Vita, R. D., Sanctis, E. D., Deur, A., Djalali, C., Doughty, D., Dupre, R., Alaoui, A. E., Eugenio, P., Fegan, S., Fradi, A., Giovanetti, K. L., Girod, F. X., Gohn, W., Graham, L., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Hicks, K., Ho, D., Holtrop, M., Ilieva, Y., Ireland, D. G., H. S., Jo, Joo, K., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Koirala, S., Kubarovsky, A., Kubarovsky, V., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., H. Y., Lu, I. J. D., Mao, Y., Markov, N., Martinez, D., Mayer, M., Mckinnon, B., Meyer, C. A., Mineeva, T., Mirazita, M., Moutarde, H., Munevar, E., Nadel Turonski, P., Nepali, C. S., Ostrovidov, A. I., Pappalardo, Luciano Libero, Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. A., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Protopopescu, D., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Rossi, P., Sabatie, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, G. D., Smith, L. C., Sober, D. I., Sokhan, D., Stepanyan, S., Stepanyan, S. S., Stoler, P., Strakovsky, I. I., Strauch, S., Tang, W., Taylor, C. E., Tian, Y., Tkachenko, S., Trivedi, A., Ungaro, M., Vineyard, M. F., Voskanyan, H., Voutier, E., Walford, N. K., Wood, M. H., Zachariou, N., Zhao, Z. W., and Zonta, I.

Subjects
NUCLEON FORM-FACTORS, BARYON RESONANCES, MESON PRODUCTION, PI-N SCATTERING, QUARK-MODEL, DECAYS, ELECTROPRODUCTION, REGION, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2012

34. Evidence for the onset of color transparency in rho(0) electroproduction off nuclei

Author

Fassi, L. E., Zana, L., Hafidi, K., Holtrop, M., Mustapha, B., Brooks, W. K., Hakobyan, H., Zheng, X., Adhikari, K. P., Adikaram, D., Aghasyan, M., Amaryan, M. J., Anghinolfi, M., Arrington, J., Avakian, H., Baghdasaryan, H., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Bookwalter, C., Branford, D., Briscoe, W. J., Bueltmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Cole, P. L., Contalbrigo, Marco, Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., Vita, R. D., Sanctis, E. D., Deur, A., Dey, B., Dickson, R., Djalali, C., Dodge, G. E., Doughty, D., Dupre, R., Egiyan, H., Alaoui, A. E., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Gabrielyan, M. Y., Garcon, M., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hanretty, C., Heddle, D., Hicks, K., Holt, R. J., Hyde, C. E., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jawalkar, S. S., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kuznetsov, V., Laget, J. M., H. Y., Lu, I. J. D., Mao, Y., Markov, N., Mayer, M., Mcandrew, J., Mckinnon, B., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Moreno, B., Moutarde, H., Munevar, E., Nadel Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenkov, M., Ostrovidov, A. I., Pappalardo, Luciano Libero, Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. A., Phelps, E., Pozdniakov, S., Price, J. W., Procureur, S., Protopopescu, D., Raue, B. A., Reimer, P. E., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabatie, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Sokhan, D., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tedeschi, D. J., Tkachenko, S., Ungaro, M., Vernarsky, B., Vineyard, M. F., Voskanyan, H., Voutier, E., Watts, D., Weinstein, L. B., Weygand, D. P., Wood, M. H., Zachariou, N., Zhao, B., and Zhao, Z. W.

Subjects
LARGE MOMENTUM-TRANSFER, ELASTIC-SCATTERING, DEPENDENCE, PROTON PROPAGATION, QCD, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2012

35. Electromagnetic decay of the Sigma(0)(1385) to Lambda gamma

Author

Keller, D., Hicks, K., Adhikari, K. P., Adikaram, D., Aghasyan, M., Amarian, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Careccia, S. L., Carman, D. S., Casey, L., Cole, P. L., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Dey, B., Dickson, R., Djalali, C., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fegan, S., Forest, T. A., Gabrielyan, M. Y., Gavalian, G., Gevorgyan, N., Giovanetti, K. L., Girod, F. X., Gohn, W., Golovatch, E., Gothe, R. W., Graham, L., Guidal, M., Guegan, B., Hafidi, K., Hakobyan, H., Hanretty, C., Holtrop, M., Ilieva, Y., Ireland, D. G., Isupov, E. L., Jawalkar, S. S., Jenkins, D., Jo, H. S., Joo, K., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Konczykowski, P., Kubarovsky, V., Kuleshov, S. V., Kuznetsov, V., Lu, H. Y., MacGregor, I. J. D., Markov, N., McAndrew, J., McKinnon, B., Meyer, C. A., Micherdzinska, A. M., Mirazita, M., Mokeev, V., Moreno, B., Moriya, K., Morrison, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. Anefalos, Pappalardo, L. L., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Protopopescu, D., Raue, B. A., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabatie, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Stepanyan, S. S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Vernarsky, B., Vineyard, M. F., Voutier, E., Weinstein, L. B., Watts, D. P., Wood, M. H., Zachariou, N., Zana, L., Zhao, B., and Zhao, Z. W.

Subjects
BARYONS, STRANGENESS, Electric and Magnetyic Moments, Leptonic, and radiative decays, Electromagnetic decays, Settore FIS/04 - Fisica Nucleare e Subnucleare, DECUPLET, semileptonic, Hyperons, HYPERONS, QUARK-MODEL, RADIATIVE DECAYS
Published
2011

36. Tensor correlations measured in 3He(e,e' pp)n

Author

Baghdasaryan, H, Weinstein, L, Laget, J, Adhikari, K, Aghasyan, M, Amarian, M, Anghinolfi, M, Avakian, H, Ball, J, Battaglieri, M, Bedlinskiy, I, Bennett, R, Berman, B, Biselli, A, Bookwalter, C, Briscoe, W, Brooks, W, Bültmann, S, Burkert, V, Carman, D, Crede, V, D'Angelo, A, Daniel, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Dey, B, Dickson, R, Djalali, C, Dodge, G, Doughty, D, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Eugenio, P, Fegan, S, Gabrielyan, M, Gilfoyle, G, Giovanetti, K, Gohn, W, Gothe, R, Griffioen, K, Guidal, M, Guo, L, Gyurjyan, V, Hakobyan, H, Hanretty, C, Hyde, C, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, D, Joo, K, Keller, D, Khandaker, M, Khetarpal, P, Kim, A, Kim, W, Klein, A, Klein, F, Konczykowski, P, Kubarovsky, V, Kuhn, S, Kuleshov, S, Kuznetsov, V, Kvaltine, N, Livingston, K, Lu, H, Macgregor, I, Markov, N, Mayer, M, Mcandrew, J, Mckinnon, B, Meyer, C, Mikhailov, K, Mokeev, V, Moreno, B, Moriya, K, Morrison, B, Moutarde, H, Munevar, E, Nadel Turonski, P, Nepali, C, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, A, Paremuzyan, R, Park, K, Park, S, Pasyuk, E, Pereira, S, Pisano, S, Pogorelko, O, Pozdniakov, S, Price, J, Procureur, S, Protopopescu, D, Ricco, G, Ripani, M, Rosner, G, Rossi, P, Sabatié, F, Salgado, C, Schumacher, R, Seraydaryan, H, Smith, G, Sober, D, Sokhan, D, Stepanyan, S, Stoler, P, Strauch, S, Taiuti, M, Tang, W, Taylor, C, Tedeschi, D, Ungaro, M, Vineyard, M, Voutier, E, Watts, D, Weygand, D, Wood, M, Zhao, B, and Zhao, Z

Subjects
NUCLEI, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

We have measured the 3He(e,e' pp)n reaction at an incident energy of 4.7 GeV over a wide kinematic range. We identified spectator correlated pp and pn nucleon pairs by using kinematic cuts and measured their relative and total momentum distributions. This is the first measurement of the ratio of pp to pn pairs as a function of pair total momentum p(tot). For pair relative momenta between 0.3 and 0.5 GeV/c, the ratio is very small at low p(tot) and rises to approximately 0.5 at large p(tot). This shows the dominance of tensor over central correlations at this relative momentum.

Published
2010

37. Differential cross sections and recoil polarizations for the reaction γp→K^{+}Σ^{0}

Author

Dey, B, Meyer, C, Bellis, M, Mccracken, M, Williams, M, Adhikari, K, Aghasyan, M, Anghinolfi, M, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Berman, B, Biselli, A, Branford, D, Briscoe, W, Brooks, W, Burkert, V, Carman, D, Crede, V, D'Angelo, A, Daniel, A, De Vita, R, De Sanctis, E, Deur, A, Dhamija, S, Dickson, R, Djalali, C, Doughty, D, Dugger, M, Dupre, R, El Alaoui, A, El Fassi, L, Eugenio, P, Fegan, S, Fradi, A, Gabrielyan, M, Gilfoyle, G, Giovanetti, K, Girod, F, Gohn, W, Gothe, R, Graham, L, Griffioen, K, Guler, N, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Hassall, N, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, D, Jawalkar, S, Jo, H, Joo, K, Keller, D, Khandaker, M, Khetarpal, P, Kim, A, Kim, W, Klein, A, Klein, F, Konczykowski, P, Kubarovsky, V, Kuleshov, S, Kuznetsov, V, Livingston, K, Macgregor, I, Martinez, D, Mcandrew, J, Mckinnon, B, Mikhailov, K, Mirazita, M, Mokeev, V, Moreno, B, Moriya, K, Morrison, B, Moutarde, H, Munevar, E, Nadel Turonski, P, Nasseripour, R, Nepali, C, Ni, A, Niccolai, S, Niculescu, G, Niculescu, I, Niroula, M, Osipenko, M, Ostrovidov, A, Paremuzyan, R, Park, K, Park, S, Pasyuk, E, Pereira, S, Pogorelko, O, Pozdniakov, S, Price, J, Procureur, S, Protopopescu, D, Raue, B, Ricco, G, Ripani, M, Ritchie, B, Rosner, G, Rossi, P, Salamanca, J, Salgado, C, Schott, D, Schumacher, R, Seder, E, Seraydaryan, H, Sharabian, Y, Smith, E, Smith, G, Sober, D, Sokhan, D, Stepanyan, S, Strakovsky, I, Strauch, S, Tang, W, Taylor, C, Tedeschi, D, Tkachenko, S, Ungaro, M, Watts, D, Vernarsky, B, Vineyard, M, Voutier, E, Weinstein, L, Wood, M, Yegneswaran, A, Zhang, J, Zhao, B, and Zhao, Z

Subjects
BARYON RESONANCES, MESON PHOTOPRODUCTION, SPIN OBSERVABLES, ENERGIES, SIGMA(0), LAMBDA, K+, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2010

38. Coherent Photoproduction of pi^+ from 3^He

Author

Nasseripour, R., Berman, B.L., Adhikari, K.P., Adikaram, D., Anghinolfi, M., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A.S., Branford, D., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Carman, D.S., Casey, L., Cole, P.L., Collins, P., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Dey, B., Dickson, R., Djalali, C., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Fegan, S., Fradi, A., Gabrielyan, M.Y., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Goetz, J.T., Gohn, W., Gothe, R.W., Graham, L., Griffioen, K.A., Guegan, B., Hafidi, K., Hakobyan, H., Hanretty, C., Heddle, D., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D.G., Isupov, E.L., Keller, D., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F.J., Konczykowski, P., Kubarovsky, V., Kuhn, S.E., Kuleshov, S.V., Kuznetsov, V., Kvaltine, N.D., Livingston, K., Lu, H.Y., Macgregor, I.J.D., Mayer, M., McAndrew, J., Mckinnon, B., Micherdzinska, A.M., Mirazita, M., Moriya, K., Moreno, B., Morrison, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A.I., Paolone, M., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Anefalos Pereira, S., Perrin, Y., Pisano, S., Pozdniakov, S., Price, J.W., Procureur, S., Protopopescu, D., Ripani, M., Ritchie, B.G., Rosner, G., Rossi, P., Sabatié, F., Saini, M.S., Salgado, C., Schott, D., Schumacher, R.A., Seraydaryan, H., Sharabian, Y.G., Smith, E.S., Smith, G.D., Sober, D.I., Sokhan, D., Stepanyan, S.S., Stepanyan, S., Stoler, P., Strauch, S., Suleiman, R., Taiuti, M., Tang, W., Taylor, C.E., Tedeschi, D.J., Tkachenko, S., Ungaro, M., Vernarsky, B., Vineyard, M.F., Voutier, E., Watts, D.P., Weinstein, L.B., Weygand, D.P., Wood, M.H., 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), 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), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), CLAS, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)

Subjects
H-3, FOS: Physical sciences, PION-PHOTOPRODUCTION, RESONANCE, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], THRESHOLD, REGION, Settore FIS/04 - Fisica Nucleare e Subnucleare, CLAS, SYSTEM, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

We have measured the differential cross section for the $\gamma$$^3$He$\rightarrow \pi^+ t$ reaction. This reaction was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. Real photons produced with the Hall-B bremsstrahlung tagging system in the energy range from 0.50 to 1.55 GeV were incident on a cryogenic liquid $^3$He target. The differential cross sections for the $\gamma$$^3$He$\rightarrow \pi^+ t$ reaction were measured as a function of photon-beam energy and pion-scattering angle. Theoretical predictions to date cannot explain the large cross sections except at backward angles, showing that additional components must be added to the model., Comment: 11 pages, 16 figures

Published
2010
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39. Measurement of the Nucleon Structure Function F2 in the Nuclear Medium and Evaluation of its Moments

Author

Osipenko, M, Ricco, G, Simula, S, Ripani, M, Taiuti, M, Adhikari, K, Amaryan, M, Anghinolfi, M, Avakian, H, Baghdasaryan, H, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, A, Branford, D, Briscoe, W, Brooks, W, Burkert, V, Careccia, S, Carman, D, Cole, P, Collins, P, Crede, V, D'Angelo, A, Daniel, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Dey, B, Dhamija, S, Dickson, R, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, El Alaoui, A, Eugenio, P, Fegan, S, Forest, T, Fradi, A, Gabrielyan, M, Gevorgyan, N, Gilfoyle, G, Giovanetti, K, Gohn, W, Gothe, R, Griffioen, K, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Hassall, N, Heddle, D, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, D, Isupov, E, Jawalkar, S, Jo, H, Joo, K, Keller, D, Khandaker, M, Khetarpal, P, Kim, W, Klein, A, Klein, F, Kubarovsky, V, Kuhn, S, Kuleshov, S, Kuznetsov, V, Livingston, K, Lu, H, Martinez, D, Mayer, M, Mcandrew, J, Mccracken, M, Mckinnon, B, Meyer, C, Mirazita, M, Mokeev, V, Moreno, B, Moriya, K, Morrison, B, Moutarde, H, Munevar, E, Nadel Turonski, P, Nasseripour, R, Niccolai, S, Niculescu, I, Ostrovidov, A, Paremuzyan, R, Park, K, Park, S, Pasyuk, E, Pereira, S, Pisano, S, Pogoreiko, O, Pozdniakov, S, Price, J, Procureur, S, Prok, Y, Protopopescu, D, Raue, B, Rosner, G, Rossi, P, Sabatie, F, Saini, M, Salamanca, J, Salgado, C, Saracco, P, Schumacher, R, Seraydaryan, H, Sharabian, Y, Smith, E, Sober, D, Sokhan, D, Stepanyan, S, Stoler, P, Strauch, S, Tedeschi, D, Tkachenko, S, Ungaro, M, Vernarsky, B, Vineyard, M, Voutier, E, Watts, D, Weygand, D, Wood, M, Yegneswaran, A, 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), 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 Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), CLAS, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)

Subjects
Moments, Nuclear Theory, FOS: Physical sciences, PRECISION-MEASUREMENT, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], INELASTIC STRUCTURE FUNCTIONS, STRUCTURE-FUNCTION RATIOS, INCLUSIVE ELECTRON-SCATTERING, RADIATIVE-CORRECTIONS, PRECISION-MEASUREMENT, CROSS-SECTIONS, NNLO EVOLUTION, LEADING TWIST, HIGH Q2, CARBON, Settore FIS/04 - Fisica Nucleare e Subnucleare, CROSS-SECTIONS, High Energy Physics - Experiment, Nucleon structure, CARBON, High Energy Physics - Experiment (hep-ex), LEADING TWIST, High Energy Physics - Phenomenology (hep-ph), INCLUSIVE ELECTRON-SCATTERING, INELASTIC STRUCTURE FUNCTIONS, Higher twists, RADIATIVE-CORRECTIONS, Nuclear Experiment (nucl-ex), Nuclear Experiment, STRUCTURE-FUNCTION RATIOS, QCD, Nuclear modifications, OPE, NNLO EVOLUTION, HIGH Q2, High Energy Physics - Phenomenology
Abstract

We report on the measurement of inclusive electron scattering off a carbon target performed with CLAS at Jefferson Laboratory. A combination of three different beam energies 1.161, 2.261 and 4.461 GeV allowed us to reach an invariant mass of the final-state hadronic system W~2.4 GeV with four-momentum transfers Q2 ranging from 0.2 to 5 GeV2. These data, together with previous measurements of the inclusive electron scattering off proton and deuteron, which cover a similar continuous two-dimensional region of Q2 and Bjorken variable x, permit the study of nuclear modifications of the nucleon structure. By using these, as well as other world data, we evaluated the F2 structure function and its moments. Using an OPE-based twist expansion, we studied the Q2-evolution of the moments, obtaining a separation of the leading-twist and the total higher-twist terms. The carbon-to-deuteron ratio of the leading-twist contributions to the F2 moments exhibits the well known EMC effect, compatible with that discovered previously in x-space. The total higher-twist term in the carbon nucleus appears, although with large systematic uncertainites, to be smaller with respect to the deuteron case for n, 37 pages, 15 figures

Published
2010

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