Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS

A. Kim; H. Avakian; V. Burkert; K. Joo; W. Kim; K. P. Adhikari; Z. Akbar; S. Anefalos Pereira; R. A. Badui; M. Battaglieri; V. Batourine; I. Bedlinskiy; A. S. Biselli; S. Boiarinov; P. Bosted; W. J. Briscoe; W. K. Brooks; S. Bültmann; T. Cao; D. S. Carman; A. Celentano; S. Chandavar; G. Charles; T. Chetry; L. Colaneri; P. L. Cole; N. Compton; M. Contalbrigo; O. Cortes; V. Crede; A. D'Angelo; N. Dashyan; R. De Vita; E. De Sanctis; C. Djalali; H. Egiyan; A. El Alaoui; L. El Fassi; P. Eugenio; G. Fedotov; R. Fersch; A. Filippi; J. A. Fleming; A. Fradi; M. Garc con; Y. Ghandilyan; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; W. Gohn; E. Golovatch; R. W. Gothe; K. A. Griffioen; L. Guo; K. Hafidi; C. Hanretty; M. Hattawy; D. Heddle; K. Hicks; M. Holtrop; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; D. Jenkins; H. Jiang; H. S. Jo; S. Joosten; D. Keller; G. Khachatryan; M. Khandaker; A. Klein; F. J. Klein; V. Kubarovsky; S. E. Kuhn; S. V. Kuleshov; L. Lanza; P. Lenisa; H. Y. Lu; I. J.D. MacGregor; N. Markov; P. Mattione; M. E. McCracken; B. McKinnon; V. Mokeev; A. Movsisyan; E. Munevar; P. Nadel-Turonski; L. A. Net; S. Niccolai; M. Osipenko; A. I. Ostrovidov; M. Paolone; K. Park; E. Pasyuk; W. Phelps; S. Pisano; O. Pogorelko; J. W. Price; Y. Prok; M. Ripani; A. Rizzo; G. Rosner; P. Rossi; P. Roy; C. Salgado; R. A. Schumacher; E. Seder; Y. G. Sharabian; Iu Skorodumina; G. D. Smith; D. Sokhan; N. Sparveris; S. Stepanyan; P. Stoler; I. I. Strakovsky; S. Strauch; V. Sytnik; M. Taiuti; B. Torayev; M. Ungaro; H. Voskanyan; E. Voutier; D. P. Watts; X. Wei; L. B. Weinstein; N. Zachariou; L. Zana; J. Zhang

doi:10.1016/j.physletb.2017.02.032

Target and double spin asymmetries of deeply virtual π⁰ production with a longitudinally polarized proton target and CLAS

A. Kim, H. Avakian, V. Burkert, K. Joo, W. Kim, K. P. Adhikari, Z. Akbar, S. Anefalos Pereira, R. A. Badui, M. Battaglieri, V. Batourine, I. Bedlinskiy, A. S. Biselli, S. Boiarinov, P. Bosted, W. J. Briscoe, W. K. Brooks, S. Bültmann, T. Cao, D. S. CarmanA. Celentano, S. Chandavar, G. Charles, T. Chetry, L. Colaneri, P. L. Cole, N. Compton, M. Contalbrigo, O. Cortes, V. Crede, A. D'Angelo, N. Dashyan, R. De Vita, E. De Sanctis, C. Djalali, H. Egiyan, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, R. Fersch, A. Filippi, J. A. Fleming, A. Fradi, M. Garc con, Y. Ghandilyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, W. Gohn, E. Golovatch, R. W. Gothe, K. A. Griffioen, L. Guo, K. Hafidi, C. Hanretty, M. Hattawy, D. Heddle, K. Hicks, M. Holtrop, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, D. Jenkins, H. Jiang, H. S. Jo, S. Joosten, D. Keller, G. Khachatryan, M. Khandaker, A. Klein, F. J. Klein, V. Kubarovsky, S. E. Kuhn, S. V. Kuleshov, L. Lanza, P. Lenisa, H. Y. Lu, I. J.D. MacGregor, N. Markov, P. Mattione, M. E. McCracken, B. McKinnon, V. Mokeev, A. Movsisyan, E. Munevar, P. Nadel-Turonski, L. A. Net, S. Niccolai, M. Osipenko, A. I. Ostrovidov, M. Paolone, K. Park, E. Pasyuk, W. Phelps, S. Pisano, O. Pogorelko, J. W. Price, Y. Prok, M. Ripani, A. Rizzo, G. Rosner, P. Rossi, P. Roy, C. Salgado, R. A. Schumacher, E. Seder, Y. G. Sharabian, Iu Skorodumina, G. D. Smith, D. Sokhan, N. Sparveris, S. Stepanyan, P. Stoler, I. I. Strakovsky, S. Strauch, V. Sytnik, M. Taiuti, B. Torayev, M. Ungaro, H. Voskanyan, E. Voutier, D. P. Watts, X. Wei, L. B. Weinstein, N. Zachariou, L. Zana, J. Zhang

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Abstract

The target and double spin asymmetries of the exclusive pseudoscalar channel e→p→→epπ⁰ were measured for the first time in the deep-inelastic regime using a longitudinally polarized 5.9 GeV electron beam and a longitudinally polarized proton target at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS). The data were collected over a large kinematic phase space and divided into 110 four-dimensional bins of Q², x_B, −t and ϕ. Large values of asymmetry moments clearly indicate a substantial contribution to the polarized structure functions from transverse virtual photon amplitudes. The interpretation of experimental data in terms of generalized parton distributions (GPDs) provides the first insight on the chiral-odd GPDs H˜_T and E_T, and complement previous measurements of unpolarized structure functions sensitive to the GPDs H_T and E¯_T. These data provide a crucial input for parametrizations of essentially unknown chiral-odd GPDs and will strongly influence existing theoretical calculations based on the handbag formalism.

Original language	English
Pages (from-to)	168-173
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	768
DOIs	https://doi.org/10.1016/j.physletb.2017.02.032
State	Published - 10 May 2017

Keywords

CLAS collaboration
Chiral-odd generalized parton distributions
Deeply Virtual Meson Production
Longitudinally polarized target
Nucleon structure

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10.1016/j.physletb.2017.02.032

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Kim, A., Avakian, H., Burkert, V., Joo, K., Kim, W., Adhikari, K. P., Akbar, Z., Anefalos Pereira, S., Badui, R. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Bosted, P., Briscoe, W. J., Brooks, W. K., Bültmann, S., Cao, T., ... Zhang, J. (2017). Target and double spin asymmetries of deeply virtual π⁰ production with a longitudinally polarized proton target and CLAS. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 768, 168-173. https://doi.org/10.1016/j.physletb.2017.02.032

@article{1f54dec110ce42669ca49029e7c96221,

title = "Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS",

abstract = "The target and double spin asymmetries of the exclusive pseudoscalar channel e→p→→epπ0 were measured for the first time in the deep-inelastic regime using a longitudinally polarized 5.9 GeV electron beam and a longitudinally polarized proton target at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS). The data were collected over a large kinematic phase space and divided into 110 four-dimensional bins of Q2, xB, −t and ϕ. Large values of asymmetry moments clearly indicate a substantial contribution to the polarized structure functions from transverse virtual photon amplitudes. The interpretation of experimental data in terms of generalized parton distributions (GPDs) provides the first insight on the chiral-odd GPDs H˜T and ET, and complement previous measurements of unpolarized structure functions sensitive to the GPDs HT and E¯T. These data provide a crucial input for parametrizations of essentially unknown chiral-odd GPDs and will strongly influence existing theoretical calculations based on the handbag formalism.",

keywords = "CLAS collaboration, Chiral-odd generalized parton distributions, Deeply Virtual Meson Production, Longitudinally polarized target, Nucleon structure",

author = "A. Kim and H. Avakian and V. Burkert and K. Joo and W. Kim and Adhikari, {K. P.} and Z. Akbar and {Anefalos Pereira}, S. and Badui, {R. A.} and M. Battaglieri and V. Batourine and I. Bedlinskiy and Biselli, {A. S.} and S. Boiarinov and P. Bosted and Briscoe, {W. J.} and Brooks, {W. K.} and S. B{\"u}ltmann and T. Cao and Carman, {D. S.} and A. Celentano and S. Chandavar and G. Charles and T. Chetry and L. Colaneri and Cole, {P. L.} and N. Compton and M. Contalbrigo and O. Cortes and V. Crede and A. D'Angelo and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and C. Djalali and H. Egiyan and {El Alaoui}, A. and {El Fassi}, L. and P. Eugenio and G. Fedotov and R. Fersch and A. Filippi and Fleming, {J. A.} and A. Fradi and {Garc con}, M. and Y. Ghandilyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and W. Gohn and E. Golovatch and Gothe, {R. W.} and Griffioen, {K. A.} and L. Guo and K. Hafidi and C. Hanretty and M. Hattawy and D. Heddle and K. Hicks and M. Holtrop and Y. Ilieva and Ireland, {D. G.} and Ishkhanov, {B. S.} and D. Jenkins and H. Jiang and Jo, {H. S.} and S. Joosten and D. Keller and G. Khachatryan and M. Khandaker and A. Klein and Klein, {F. J.} and V. Kubarovsky and Kuhn, {S. E.} and Kuleshov, {S. V.} and L. Lanza and P. Lenisa and Lu, {H. Y.} and MacGregor, {I. J.D.} and N. Markov and P. Mattione and McCracken, {M. E.} and B. McKinnon and V. Mokeev and A. Movsisyan and E. Munevar and P. Nadel-Turonski and Net, {L. A.} and S. Niccolai and M. Osipenko and Ostrovidov, {A. I.} and M. Paolone and K. Park and E. Pasyuk and W. Phelps and S. Pisano and O. Pogorelko and Price, {J. W.} and Y. Prok and M. Ripani and A. Rizzo and G. Rosner and P. Rossi and P. Roy and C. Salgado and Schumacher, {R. A.} and E. Seder and Sharabian, {Y. G.} and Iu Skorodumina and Smith, {G. D.} and D. Sokhan and N. Sparveris and S. Stepanyan and P. Stoler and Strakovsky, {I. I.} and S. Strauch and V. Sytnik and M. Taiuti and B. Torayev and M. Ungaro and H. Voskanyan and E. Voutier and Watts, {D. P.} and X. Wei and Weinstein, {L. B.} and N. Zachariou and L. Zana and J. Zhang",

note = "Publisher Copyright: {\textcopyright} 2017 The Author(s)",

year = "2017",

month = may,

day = "10",

doi = "10.1016/j.physletb.2017.02.032",

language = "English",

volume = "768",

pages = "168--173",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

Kim, A, Avakian, H, Burkert, V, Joo, K, Kim, W, Adhikari, KP, Akbar, Z, Anefalos Pereira, S, Badui, RA, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, AS, Boiarinov, S, Bosted, P, Briscoe, WJ, Brooks, WK, Bültmann, S, Cao, T, Carman, DS, Celentano, A, Chandavar, S, Charles, G, Chetry, T, 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, Egiyan, H, El Alaoui, A, El Fassi, L, Eugenio, P, Fedotov, G, Fersch, R, Filippi, A, Fleming, JA, Fradi, A, Garc con, M, Ghandilyan, Y, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Gohn, W, Golovatch, E, Gothe, RW, Griffioen, KA, Guo, L, Hafidi, K, Hanretty, C, Hattawy, M, Heddle, D, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Jenkins, D, Jiang, H, Jo, HS, Joosten, S, Keller, D, Khachatryan, G, Khandaker, M, Klein, A, Klein, FJ, Kubarovsky, V, Kuhn, SE, Kuleshov, SV, Lanza, L, Lenisa, P, Lu, HY, MacGregor, IJD, Markov, N, Mattione, P, McCracken, ME, McKinnon, B, Mokeev, V, Movsisyan, A, Munevar, E, Nadel-Turonski, P, Net, LA, Niccolai, S, Osipenko, M, Ostrovidov, AI, Paolone, M, Park, K, Pasyuk, E, Phelps, W, Pisano, S, Pogorelko, O, Price, JW, Prok, Y, Ripani, M, Rizzo, A, Rosner, G, Rossi, P, Roy, P, Salgado, C, Schumacher, RA, Seder, E, Sharabian, YG, Skorodumina, I, Smith, GD, Sokhan, D, Sparveris, N, Stepanyan, S, Stoler, P, Strakovsky, II, Strauch, S, Sytnik, V, Taiuti, M, Torayev, B, Ungaro, M, Voskanyan, H, Voutier, E, Watts, DP, Wei, X, Weinstein, LB, Zachariou, N, Zana, L & Zhang, J 2017, 'Target and double spin asymmetries of deeply virtual π⁰ production with a longitudinally polarized proton target and CLAS', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 768, pp. 168-173. https://doi.org/10.1016/j.physletb.2017.02.032

TY - JOUR

T1 - Target and double spin asymmetries of deeply virtual π0 production with a longitudinally polarized proton target and CLAS

AU - Kim, A.

AU - Avakian, H.

AU - Burkert, V.

AU - Joo, K.

AU - Kim, W.

AU - Adhikari, K. P.

AU - Akbar, Z.

AU - Anefalos Pereira, S.

AU - Badui, R. A.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Bosted, P.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bültmann, S.

AU - Cao, T.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

AU - Charles, G.

AU - Chetry, T.

AU - Colaneri, L.

AU - Cole, P. L.

AU - Compton, N.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - Crede, V.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Djalali, C.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fersch, R.

AU - Filippi, A.

AU - Fleming, J. A.

AU - Fradi, A.

AU - Garc con, M.

AU - Ghandilyan, Y.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Gohn, W.

AU - Golovatch, E.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guo, L.

AU - Hafidi, K.

AU - Hanretty, C.

AU - Hattawy, M.

AU - Heddle, D.

AU - Hicks, K.

AU - Holtrop, M.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Jenkins, D.

AU - Jiang, H.

AU - Jo, H. S.

AU - Joosten, S.

AU - Keller, D.

AU - Khachatryan, G.

AU - Khandaker, M.

AU - Klein, A.

AU - Klein, F. J.

AU - Kubarovsky, V.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Lanza, L.

AU - Lenisa, P.

AU - Lu, H. Y.

AU - MacGregor, I. J.D.

AU - Markov, N.

AU - Mattione, P.

AU - McCracken, M. E.

AU - McKinnon, B.

AU - Mokeev, V.

AU - Movsisyan, A.

AU - Munevar, E.

AU - Nadel-Turonski, P.

AU - Net, L. A.

AU - Niccolai, S.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Paolone, M.

AU - Park, K.

AU - Pasyuk, E.

AU - Phelps, W.

AU - Pisano, S.

AU - Pogorelko, O.

AU - Price, J. W.

AU - Prok, Y.

AU - Ripani, M.

AU - Rizzo, A.

AU - Rosner, G.

AU - Rossi, P.

AU - Roy, P.

AU - Salgado, C.

AU - Schumacher, R. A.

AU - Seder, E.

AU - Sharabian, Y. G.

AU - Skorodumina, Iu

AU - Smith, G. D.

AU - Sokhan, D.

AU - Sparveris, N.

AU - Stepanyan, S.

AU - Stoler, P.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Sytnik, V.

AU - Taiuti, M.

AU - Torayev, B.

AU - Ungaro, M.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Watts, D. P.

AU - Wei, X.

AU - Weinstein, L. B.

AU - Zachariou, N.

AU - Zana, L.

AU - Zhang, J.

PY - 2017/5/10

Y1 - 2017/5/10

N2 - The target and double spin asymmetries of the exclusive pseudoscalar channel e→p→→epπ0 were measured for the first time in the deep-inelastic regime using a longitudinally polarized 5.9 GeV electron beam and a longitudinally polarized proton target at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS). The data were collected over a large kinematic phase space and divided into 110 four-dimensional bins of Q2, xB, −t and ϕ. Large values of asymmetry moments clearly indicate a substantial contribution to the polarized structure functions from transverse virtual photon amplitudes. The interpretation of experimental data in terms of generalized parton distributions (GPDs) provides the first insight on the chiral-odd GPDs H˜T and ET, and complement previous measurements of unpolarized structure functions sensitive to the GPDs HT and E¯T. These data provide a crucial input for parametrizations of essentially unknown chiral-odd GPDs and will strongly influence existing theoretical calculations based on the handbag formalism.

AB - The target and double spin asymmetries of the exclusive pseudoscalar channel e→p→→epπ0 were measured for the first time in the deep-inelastic regime using a longitudinally polarized 5.9 GeV electron beam and a longitudinally polarized proton target at Jefferson Lab with the CEBAF Large Acceptance Spectrometer (CLAS). The data were collected over a large kinematic phase space and divided into 110 four-dimensional bins of Q2, xB, −t and ϕ. Large values of asymmetry moments clearly indicate a substantial contribution to the polarized structure functions from transverse virtual photon amplitudes. The interpretation of experimental data in terms of generalized parton distributions (GPDs) provides the first insight on the chiral-odd GPDs H˜T and ET, and complement previous measurements of unpolarized structure functions sensitive to the GPDs HT and E¯T. These data provide a crucial input for parametrizations of essentially unknown chiral-odd GPDs and will strongly influence existing theoretical calculations based on the handbag formalism.

KW - CLAS collaboration

KW - Chiral-odd generalized parton distributions

KW - Deeply Virtual Meson Production

KW - Longitudinally polarized target

KW - Nucleon structure

UR - http://www.scopus.com/inward/record.url?scp=85014170620&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2017.02.032

DO - 10.1016/j.physletb.2017.02.032

M3 - Article

AN - SCOPUS:85014170620

SN - 0370-2693

VL - 768

SP - 168

EP - 173

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ER -

Target and double spin asymmetries of deeply virtual π⁰ production with a longitudinally polarized proton target and CLAS

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