Measurement of ep→epπ0 beam spin asymmetries above the resonance region

R. De Masi; M. Garçon; B. Zhao; M. J. Amaryan; P. Ambrozewicz; M. Anghinolfi; G. Asryan; H. Avakian; H. Bagdasaryan; N. Baillie; J. Ball; J. P. Ball; N. A. Baltzell; V. Batourine; M. Battaglieri; I. Bedlinskiy; M. Bellis; N. Benmouna; B. L. Berman; P. Bertin; A. S. Biselli; L. Blaszczyk; S. Bouchigny; S. Boiarinov; R. Bradford; D. Branford; W. J. Briscoe; W. K. Brooks; S. Bültmann; V. D. Burkert; C. Butuceanu; J. R. Calarco; S. L. Careccia; D. S. Carman; L. Casey; S. Chen; L. Cheng; P. L. Cole; P. Collins; P. Coltharp; D. Crabb; V. Crede; N. Dashyan; E. De Sanctis; R. De Vita; P. V. Degtyarenko; A. Deur; K. V. Dharmawardane; R. Dickson; C. Djalali; G. E. Dodge; J. Donnelly; D. Doughty; M. Dugger; O. P. Dzyubak; H. Egiyan; K. S. Egiyan; L. El Fassi; L. Elouadrhiri; P. Eugenio; G. Fedotov; G. Feldman; A. Fradi; H. Funsten; G. Gavalian; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; A. Gonenc; R. W. Gothe; K. A. Griffioen; M. Guidal; N. Guler; L. Guo; V. Gyurjyan; K. Hafidi; H. Hakobyan; C. Hanretty; F. W. Hersman; K. Hicks; I. Hleiqawi; M. Holtrop; C. E. Hyde-Wright; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; M. M. Ito; D. Jenkins; H. S. Jo; J. R. Johnstone; K. Joo; H. G. Juengst; N. Kalantarians; J. D. Kellie; M. Khandaker; W. Kim; A. Klein; F. J. Klein; A. V. Klimenko; M. Kossov; Z. Krahn; L. H. Kramer; V. Kubarovsky; J. Kuhn; S. E. Kuhn; S. V. Kuleshov; J. Lachniet; J. M. Laget; J. Langheinrich; D. Lawrence; T. Lee; K. Livingston; H. Y. Lu; M. MacCormick; N. Markov; P. Mattione; M. Mazouz; B. McKinnon; B. A. Mecking; M. D. Mestayer; C. A. Meyer; T. Mibe; B. Michel; K. Mikhailov; M. Mirazita; R. Miskimen; V. Mokeev; B. Moreno; K. Moriya; S. A. Morrow; M. Moteabbed; E. Munevar; G. S. Mutchler; P. Nadel-Turonski; R. Nasseripour; S. Niccolai; G. Niculescu; I. Niculescu; B. B. Niczyporuk; M. R. Niroula; R. A. Niyazov; M. Nozar; M. Osipenko; A. I. Ostrovidov; K. Park; E. Pasyuk; C. Paterson; S. Anefalos Pereira; J. Pierce; N. Pivnyuk; D. Pocanic; O. Pogorelko; S. Pozdniakov; J. W. Price; S. Procureur; Y. Prok; D. Protopopescu; B. A. Raue; G. Ricco; M. Ripani; B. G. Ritchie; F. Ronchetti; G. Rosner; P. Rossi; F. Sabatié; J. Salamanca; C. Salgado; J. P. Santoro; V. Sapunenko; R. A. Schumacher; V. S. Serov; Y. G. Sharabian; D. Sharov; N. V. Shvedunov; E. S. Smith; L. C. Smith; D. I. Sober; D. Sokhan; A. Stavinsky; S. Stepanyan; S. S. Stepanyan; B. E. Stokes; P. Stoler; I. I. Strakovsky; S. Strauch; M. Taiuti; D. J. Tedeschi; A. Tkabladze; S. Tkachenko; C. Tur; M. Ungaro; M. F. Vineyard; A. V. Vlassov; E. Voutier; D. P. Watts; L. B. Weinstein; D. P. Weygand; M. Williams; E. Wolin; M. H. Wood; A. Yegneswaran; L. Zana; J. Zhang; Z. W. Zhao

doi:10.1103/PhysRevC.77.042201

Measurement of ep→epπ0 beam spin asymmetries above the resonance region

R. De Masi
, M. Garçon
, B. Zhao
, M. J. Amaryan
, P. Ambrozewicz
, M. Anghinolfi
, G. Asryan
, H. Avakian
, H. Bagdasaryan
, N. Baillie
, J. Ball
, J. P. Ball
, N. A. Baltzell
, V. Batourine
, M. Battaglieri
, I. Bedlinskiy
, M. Bellis
, N. Benmouna
, B. L. Berman
, P. Bertin

A. S. Biselli, L. Blaszczyk, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, V. D. Burkert, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, L. Casey, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Crabb, V. Crede, N. Dashyan, E. De Sanctis, R. De Vita, P. V. Degtyarenko, A. Deur, K. V. Dharmawardane, R. Dickson, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, M. Dugger, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, L. Elouadrhiri, P. Eugenio, G. Fedotov, G. Feldman, A. Fradi, H. Funsten, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, A. Gonenc, R. W. Gothe, K. A. Griffioen, M. Guidal, N. Guler, L. Guo, V. Gyurjyan, K. Hafidi, H. Hakobyan, C. Hanretty, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, C. E. Hyde-Wright, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, M. M. Ito, D. Jenkins, H. S. Jo, J. R. Johnstone, K. Joo, H. G. Juengst, N. Kalantarians, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Kossov, Z. Krahn, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, T. Lee, K. Livingston, H. Y. Lu, M. MacCormick, N. Markov, P. Mattione, M. Mazouz, B. McKinnon, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, B. Michel, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, B. Moreno, K. Moriya, S. A. Morrow, M. Moteabbed, E. Munevar, G. S. Mutchler, P. Nadel-Turonski, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, M. R. Niroula, R. A. Niyazov, M. Nozar, M. Osipenko, A. I. Ostrovidov, K. Park, E. Pasyuk, C. Paterson, S. Anefalos Pereira, J. Pierce, N. Pivnyuk, D. Pocanic, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, B. G. Ritchie, F. Ronchetti, G. Rosner, P. Rossi, F. Sabatié, J. Salamanca, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, N. V. Shvedunov, E. S. Smith, L. C. Smith, D. I. Sober, D. Sokhan, A. Stavinsky, S. Stepanyan, S. S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, A. Tkabladze, S. Tkachenko, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, E. Voutier, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, J. Zhang, Z. W. Zhao

CEA Saclay
Institut de Physique Nucléaire Orsay
University of Connecticut
Old Dominion University
Florida International University
National Institute for Nuclear Physics
A. Alikhanian Yerevan Institute of Physics
Thomas Jefferson National Accelerator Facility
College of William and Mary
Arizona State University
University of South Carolina
Kyungpook National University
Alikhanov Institute for Theoretical and Experimental Physics
Carnegie Mellon University
George Washington University
Université Blaise Pascal
Fairfield University
Florida State University
University of Edinburgh
University of New Hampshire
Catholic University of America
Idaho State University
University of Virginia
University of Glasgow
Christopher Newport University
Argonne National Laboratory
Lomonosov Moscow State University
University of Richmond
James Madison University
University of California at Los Angeles
Ohio University
Virginia Polytechnic Institute and State University
Norfolk State University
Rensselaer Polytechnic Institute
University of Massachusetts
Rice University
Université Joseph Fourier Grenoble 1
California State University Dominguez Hills
Union College

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Abstract

The beam spin asymmetry (BSA) in the exclusive reaction e→p→epπ0 was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer (CLAS). The xB,Q2,t, and dependences of the π0 BSA are presented in the deep inelastic regime. The asymmetries are fitted with a sin function and their amplitudes are extracted. Overall, they are of the order of 0.04-0.11 and roughly independent of t. This is the signature of a nonzero longitudinal-transverse interference. The implications concerning the applicability of a formalism based on generalized parton distributions, as well as the extension of a Regge formalism at high photon virtualities, are discussed.

Original language	English
Article number	042201
Journal	Physical Review C - Nuclear Physics
Volume	77
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.77.042201
State	Published - 14 Apr 2008

Access to Document

10.1103/PhysRevC.77.042201

Cite this

Masi, R. D., Garçon, M., Zhao, B., Amaryan, M. J., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J., Ball, J. P., Baltzell, N. A., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bellis, M., Benmouna, N., Berman, B. L., ... Zhao, Z. W. (2008). Measurement of ep→epπ0 beam spin asymmetries above the resonance region. Physical Review C - Nuclear Physics, 77(4), Article 042201. https://doi.org/10.1103/PhysRevC.77.042201

@article{4559cb359eba45bf8c1ae710f91d8478,

title = "Measurement of ep→epπ0 beam spin asymmetries above the resonance region",

abstract = "The beam spin asymmetry (BSA) in the exclusive reaction e→p→epπ0 was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer (CLAS). The xB,Q2,t, and dependences of the π0 BSA are presented in the deep inelastic regime. The asymmetries are fitted with a sin function and their amplitudes are extracted. Overall, they are of the order of 0.04-0.11 and roughly independent of t. This is the signature of a nonzero longitudinal-transverse interference. The implications concerning the applicability of a formalism based on generalized parton distributions, as well as the extension of a Regge formalism at high photon virtualities, are discussed.",

author = "Masi, \{R. De\} and M. Gar{\c c}on and B. Zhao and Amaryan, \{M. J.\} and P. Ambrozewicz and M. Anghinolfi and G. Asryan and H. Avakian and H. Bagdasaryan and N. Baillie and J. Ball and Ball, \{J. P.\} and Baltzell, \{N. A.\} and V. Batourine and M. Battaglieri and I. Bedlinskiy and M. Bellis and N. Benmouna and Berman, \{B. L.\} and P. Bertin and Biselli, \{A. S.\} and L. Blaszczyk and S. Bouchigny and S. Boiarinov and R. Bradford and D. Branford and Briscoe, \{W. J.\} and Brooks, \{W. K.\} and S. B{\"u}ltmann and Burkert, \{V. D.\} and C. Butuceanu and Calarco, \{J. R.\} and Careccia, \{S. L.\} and Carman, \{D. S.\} and L. Casey and S. Chen and L. Cheng and Cole, \{P. L.\} and P. Collins and P. Coltharp and D. Crabb and V. Crede and N. Dashyan and Sanctis, \{E. De\} and Vita, \{R. De\} and Degtyarenko, \{P. V.\} and A. Deur and Dharmawardane, \{K. V.\} and R. Dickson and C. Djalali and Dodge, \{G. E.\} and J. Donnelly and D. Doughty and M. Dugger and Dzyubak, \{O. P.\} and H. Egiyan and Egiyan, \{K. S.\} and Fassi, \{L. El\} and L. Elouadrhiri and P. Eugenio and G. Fedotov and G. Feldman and A. Fradi and H. Funsten and G. Gavalian and Gilfoyle, \{G. P.\} and Giovanetti, \{K. L.\} and Girod, \{F. X.\} and Goetz, \{J. T.\} and A. Gonenc and Gothe, \{R. W.\} and Griffioen, \{K. A.\} and M. Guidal and N. Guler and L. Guo and V. Gyurjyan and K. Hafidi and H. Hakobyan and C. Hanretty and Hersman, \{F. W.\} and K. Hicks and I. Hleiqawi and M. Holtrop and Hyde-Wright, \{C. E.\} and Y. Ilieva and Ireland, \{D. G.\} and Ishkhanov, \{B. S.\} and Isupov, \{E. L.\} and Ito, \{M. M.\} and D. Jenkins and Jo, \{H. S.\} and Johnstone, \{J. R.\} and K. Joo and Juengst, \{H. G.\} and N. Kalantarians and Kellie, \{J. D.\} and M. Khandaker and W. Kim and A. Klein and Klein, \{F. J.\} and Klimenko, \{A. V.\} and M. Kossov and Z. Krahn and Kramer, \{L. H.\} and V. Kubarovsky and J. Kuhn and Kuhn, \{S. E.\} and Kuleshov, \{S. V.\} and J. Lachniet and Laget, \{J. M.\} and J. Langheinrich and D. Lawrence and T. Lee and K. Livingston and Lu, \{H. Y.\} and M. MacCormick and N. Markov and P. Mattione and M. Mazouz and B. McKinnon and Mecking, \{B. A.\} and Mestayer, \{M. D.\} and Meyer, \{C. A.\} and T. Mibe and B. Michel and K. Mikhailov and M. Mirazita and R. Miskimen and V. Mokeev and B. Moreno and K. Moriya and Morrow, \{S. A.\} and M. Moteabbed and E. Munevar and Mutchler, \{G. S.\} and P. Nadel-Turonski and R. Nasseripour and S. Niccolai and G. Niculescu and I. Niculescu and Niczyporuk, \{B. B.\} and Niroula, \{M. R.\} and Niyazov, \{R. A.\} and M. Nozar and M. Osipenko and Ostrovidov, \{A. I.\} and K. Park and E. Pasyuk and C. Paterson and Pereira, \{S. Anefalos\} and J. Pierce and N. Pivnyuk and D. Pocanic and O. Pogorelko and S. Pozdniakov and Price, \{J. W.\} and S. Procureur and Y. Prok and D. Protopopescu and Raue, \{B. A.\} and G. Ricco and M. Ripani and Ritchie, \{B. G.\} and F. Ronchetti and G. Rosner and P. Rossi and F. Sabati{\'e} and J. Salamanca and C. Salgado and Santoro, \{J. P.\} and V. Sapunenko and Schumacher, \{R. A.\} and Serov, \{V. S.\} and Sharabian, \{Y. G.\} and D. Sharov and Shvedunov, \{N. V.\} and Smith, \{E. S.\} and Smith, \{L. C.\} and Sober, \{D. I.\} and D. Sokhan and A. Stavinsky and S. Stepanyan and Stepanyan, \{S. S.\} and Stokes, \{B. E.\} and P. Stoler and Strakovsky, \{I. I.\} and S. Strauch and M. Taiuti and Tedeschi, \{D. J.\} and A. Tkabladze and S. Tkachenko and C. Tur and M. Ungaro and Vineyard, \{M. F.\} and Vlassov, \{A. V.\} and E. Voutier and Watts, \{D. P.\} and Weinstein, \{L. B.\} and Weygand, \{D. P.\} and M. Williams and E. Wolin and Wood, \{M. H.\} and A. Yegneswaran and L. Zana and J. Zhang and Zhao, \{Z. W.\}",

year = "2008",

month = apr,

day = "14",

doi = "10.1103/PhysRevC.77.042201",

language = "English",

volume = "77",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "4",

}

Masi, RD, Garçon, M, Zhao, B, Amaryan, MJ, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, J, Ball, JP, Baltzell, NA, Batourine, V, Battaglieri, M, Bedlinskiy, I, Bellis, M, Benmouna, N, Berman, BL, Bertin, P, Biselli, AS, Blaszczyk, L, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bültmann, S, Burkert, VD, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Casey, L, Chen, S, Cheng, L, Cole, PL, Collins, P, Coltharp, P, Crabb, D, Crede, V, Dashyan, N, Sanctis, ED, Vita, RD, Degtyarenko, PV, Deur, A, Dharmawardane, KV, Dickson, R, Djalali, C, Dodge, GE, Donnelly, J, Doughty, D, Dugger, M, Dzyubak, OP, Egiyan, H, Egiyan, KS, Fassi, LE, Elouadrhiri, L, Eugenio, P, Fedotov, G, Feldman, G, Fradi, A, Funsten, H, Gavalian, G, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gonenc, A, Gothe, RW, Griffioen, KA, Guidal, M, Guler, N, Guo, L, Gyurjyan, V, Hafidi, K, Hakobyan, H, Hanretty, C, Hersman, FW, Hicks, K, Hleiqawi, I, Holtrop, M, Hyde-Wright, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Ito, MM, Jenkins, D, Jo, HS, Johnstone, JR, Joo, K, Juengst, HG, Kalantarians, N, Kellie, JD, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Klimenko, AV, Kossov, M, Krahn, Z, Kramer, LH, Kubarovsky, V, Kuhn, J, Kuhn, SE, Kuleshov, SV, Lachniet, J, Laget, JM, Langheinrich, J, Lawrence, D, Lee, T, Livingston, K, Lu, HY, MacCormick, M, Markov, N, Mattione, P, Mazouz, M, McKinnon, B, Mecking, BA, Mestayer, MD, Meyer, CA, Mibe, T, Michel, B, Mikhailov, K, Mirazita, M, Miskimen, R, Mokeev, V, Moreno, B, Moriya, K, Morrow, SA, Moteabbed, M, Munevar, E, Mutchler, GS, Nadel-Turonski, P, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, BB, Niroula, MR, Niyazov, RA, Nozar, M, Osipenko, M, Ostrovidov, AI, Park, K, Pasyuk, E, Paterson, C, Pereira, SA, Pierce, J, Pivnyuk, N, Pocanic, D, Pogorelko, O, Pozdniakov, S, Price, JW, Procureur, S, Prok, Y, Protopopescu, D, Raue, BA, Ricco, G, Ripani, M, Ritchie, BG, Ronchetti, F, Rosner, G, Rossi, P, Sabatié, F, Salamanca, J, Salgado, C, Santoro, JP, Sapunenko, V, Schumacher, RA, Serov, VS, Sharabian, YG, Sharov, D, Shvedunov, NV, Smith, ES, Smith, LC, Sober, DI, Sokhan, D, Stavinsky, A, Stepanyan, S, Stepanyan, SS, Stokes, BE, Stoler, P, Strakovsky, II, Strauch, S, Taiuti, M, Tedeschi, DJ, Tkabladze, A, Tkachenko, S, Tur, C, Ungaro, M, Vineyard, MF, Vlassov, AV, Voutier, E, Watts, DP, Weinstein, LB, Weygand, DP, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Zana, L, Zhang, J & Zhao, ZW 2008, 'Measurement of ep→epπ0 beam spin asymmetries above the resonance region', Physical Review C - Nuclear Physics, vol. 77, no. 4, 042201. https://doi.org/10.1103/PhysRevC.77.042201

TY - JOUR

T1 - Measurement of ep→epπ0 beam spin asymmetries above the resonance region

AU - Masi, R. De

AU - Garçon, M.

AU - Zhao, B.

AU - Amaryan, M. J.

AU - Ambrozewicz, P.

AU - Anghinolfi, M.

AU - Asryan, G.

AU - Avakian, H.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J.

AU - Ball, J. P.

AU - Baltzell, N. A.

AU - Batourine, V.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Bertin, P.

AU - Biselli, A. S.

AU - Blaszczyk, L.

AU - Bouchigny, S.

AU - Boiarinov, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bültmann, S.

AU - Burkert, V. D.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Casey, L.

AU - Chen, S.

AU - Cheng, L.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Crabb, D.

AU - Crede, V.

AU - Dashyan, N.

AU - Sanctis, E. De

AU - Vita, R. De

AU - Degtyarenko, P. V.

AU - Deur, A.

AU - Dharmawardane, K. V.

AU - Dickson, R.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Donnelly, J.

AU - Doughty, D.

AU - Dugger, M.

AU - Dzyubak, O. P.

AU - Egiyan, H.

AU - Egiyan, K. S.

AU - Fassi, L. El

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Feldman, G.

AU - Fradi, A.

AU - Funsten, H.

AU - Gavalian, G.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Goetz, J. T.

AU - Gonenc, A.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guler, N.

AU - Guo, L.

AU - Gyurjyan, V.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Hersman, F. W.

AU - Hicks, K.

AU - Hleiqawi, I.

AU - Holtrop, M.

AU - Hyde-Wright, C. E.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Ito, M. M.

AU - Jenkins, D.

AU - Jo, H. S.

AU - Johnstone, J. R.

AU - Joo, K.

AU - Juengst, H. G.

AU - Kalantarians, N.

AU - Kellie, J. D.

AU - Khandaker, M.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Klimenko, A. V.

AU - Kossov, M.

AU - Krahn, Z.

AU - Kramer, L. H.

AU - Kubarovsky, V.

AU - Kuhn, J.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Lachniet, J.

AU - Laget, J. M.

AU - Langheinrich, J.

AU - Lawrence, D.

AU - Lee, T.

AU - Livingston, K.

AU - Lu, H. Y.

AU - MacCormick, M.

AU - Markov, N.

AU - Mattione, P.

AU - Mazouz, M.

AU - McKinnon, B.

AU - Mecking, B. A.

AU - Mestayer, M. D.

AU - Meyer, C. A.

AU - Mibe, T.

AU - Michel, B.

AU - Mikhailov, K.

AU - Mirazita, M.

AU - Miskimen, R.

AU - Mokeev, V.

AU - Moreno, B.

AU - Moriya, K.

AU - Morrow, S. A.

AU - Moteabbed, M.

AU - Munevar, E.

AU - Mutchler, G. S.

AU - Nadel-Turonski, P.

AU - Nasseripour, R.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Niczyporuk, B. B.

AU - Niroula, M. R.

AU - Niyazov, R. A.

AU - Nozar, M.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Park, K.

AU - Pasyuk, E.

AU - Paterson, C.

AU - Pereira, S. Anefalos

AU - Pierce, J.

AU - Pivnyuk, N.

AU - Pocanic, D.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Procureur, S.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Raue, B. A.

AU - Ricco, G.

AU - Ripani, M.

AU - Ritchie, B. G.

AU - Ronchetti, F.

AU - Rosner, G.

AU - Rossi, P.

AU - Sabatié, F.

AU - Salamanca, J.

AU - Salgado, C.

AU - Santoro, J. P.

AU - Sapunenko, V.

AU - Schumacher, R. A.

AU - Serov, V. S.

AU - Sharabian, Y. G.

AU - Sharov, D.

AU - Shvedunov, N. V.

AU - Smith, E. S.

AU - Smith, L. C.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Stavinsky, A.

AU - Stepanyan, S.

AU - Stepanyan, S. S.

AU - Stokes, B. E.

AU - Stoler, P.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tedeschi, D. J.

AU - Tkabladze, A.

AU - Tkachenko, S.

AU - Tur, C.

AU - Ungaro, M.

AU - Vineyard, M. F.

AU - Vlassov, A. V.

AU - Voutier, E.

AU - Watts, D. P.

AU - Weinstein, L. B.

AU - Weygand, D. P.

AU - Williams, M.

AU - Wolin, E.

AU - Wood, M. H.

AU - Yegneswaran, A.

AU - Zana, L.

AU - Zhang, J.

AU - Zhao, Z. W.

PY - 2008/4/14

Y1 - 2008/4/14

N2 - The beam spin asymmetry (BSA) in the exclusive reaction e→p→epπ0 was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer (CLAS). The xB,Q2,t, and dependences of the π0 BSA are presented in the deep inelastic regime. The asymmetries are fitted with a sin function and their amplitudes are extracted. Overall, they are of the order of 0.04-0.11 and roughly independent of t. This is the signature of a nonzero longitudinal-transverse interference. The implications concerning the applicability of a formalism based on generalized parton distributions, as well as the extension of a Regge formalism at high photon virtualities, are discussed.

AB - The beam spin asymmetry (BSA) in the exclusive reaction e→p→epπ0 was measured with the CEBAF 5.77 GeV polarized electron beam and Large Acceptance Spectrometer (CLAS). The xB,Q2,t, and dependences of the π0 BSA are presented in the deep inelastic regime. The asymmetries are fitted with a sin function and their amplitudes are extracted. Overall, they are of the order of 0.04-0.11 and roughly independent of t. This is the signature of a nonzero longitudinal-transverse interference. The implications concerning the applicability of a formalism based on generalized parton distributions, as well as the extension of a Regge formalism at high photon virtualities, are discussed.

UR - https://www.scopus.com/pages/publications/42349085927

U2 - 10.1103/PhysRevC.77.042201

DO - 10.1103/PhysRevC.77.042201

M3 - Article

AN - SCOPUS:42349085927

SN - 0556-2813

VL - 77

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

IS - 4

M1 - 042201

ER -

Measurement of ep→epπ0 beam spin asymmetries above the resonance region

Abstract

Access to Document

Other files and links

Fingerprint

Cite this