Measurement of exclusive π0 electroproduction structure functions and their relationship to transverse generalized parton distributions

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

doi:10.1103/PhysRevLett.109.112001

Measurement of exclusive π0 electroproduction structure functions and their relationship to transverse generalized parton distributions

I. Bedlinskiy
, V. Kubarovsky
, S. Niccolai
, P. Stoler
, K. P. Adhikari
, M. Aghasyan
, M. J. Amaryan
, M. Anghinolfi
, H. Avakian
, H. Baghdasaryan
, J. Ball
, N. A. Baltzell
, M. Battaglieri
, R. P. Bennett
, A. S. Biselli
, C. Bookwalter
, S. Boiarinov
, W. J. Briscoe
, W. K. Brooks
, V. D. Burkert

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

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

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

70 Scopus citations

Abstract

Exclusive π0 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 Q2, x _B, t, and _π, in the Q2 range from 1.0 to 4.6GeV2, -t up to 2GeV2, and x _B from 0.1 to 0.58. Structure functions σ _T+σ _L, σ _TT, and σ _LT were extracted as functions of t for each of 17 combinations of Q2 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+σ _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 π0 electroproduction offers direct experimental access to the transversity GPDs.

Original language	English
Article number	112001
Journal	Physical Review Letters
Volume	109
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.109.112001
State	Published - 10 Sep 2012

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10.1103/PhysRevLett.109.112001

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Bedlinskiy, I., Kubarovsky, V., Niccolai, S., Stoler, P., Adhikari, K. P., Aghasyan, M., Amaryan, M. J., Anghinolfi, M., Avakian, H., Baghdasaryan, H., Ball, J., Baltzell, N. A., Battaglieri, M., Bennett, R. P., Biselli, A. S., Bookwalter, C., Boiarinov, S., Briscoe, W. J., Brooks, W. K., ... Zonta, I. (2012). Measurement of exclusive π0 electroproduction structure functions and their relationship to transverse generalized parton distributions. Physical Review Letters, 109(11), Article 112001. https://doi.org/10.1103/PhysRevLett.109.112001

@article{3d1cfe7be002431ca694c613cb61920b,

title = "Measurement of exclusive π0 electroproduction structure functions and their relationship to transverse generalized parton distributions",

abstract = "Exclusive π0 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 Q2, x B, t, and π, in the Q2 range from 1.0 to 4.6GeV2, -t up to 2GeV2, and x B from 0.1 to 0.58. Structure functions σ T+σ L, σ TT, and σ LT were extracted as functions of t for each of 17 combinations of Q2 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+σ 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 π0 electroproduction offers direct experimental access to the transversity GPDs.",

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

year = "2012",

month = sep,

day = "10",

doi = "10.1103/PhysRevLett.109.112001",

language = "English",

volume = "109",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "11",

}

Bedlinskiy, I, Kubarovsky, V, Niccolai, S, Stoler, P, Adhikari, KP, Aghasyan, M, Amaryan, MJ, Anghinolfi, M, Avakian, H, Baghdasaryan, H, Ball, J, Baltzell, NA, Battaglieri, M, Bennett, RP, Biselli, AS, Bookwalter, C, Boiarinov, S, Briscoe, WJ, Brooks, WK, Burkert, VD, Carman, DS, 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, JA, Forest, TA, Fradi, A, Garçon, M, Gevorgyan, N, Giovanetti, KL, Girod, FX, Gohn, W, Gothe, RW, Graham, L, Griffioen, KA, Guegan, B, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Heddle, D, Hicks, K, Holtrop, M, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Jo, HS, Joo, K, Keller, D, Khandaker, M, Khetarpal, P, Kim, A, Kim, W, Klein, FJ, Koirala, S, Kubarovsky, A, Kuhn, SE, Kuleshov, SV, Kvaltine, ND, Livingston, K, Lu, HY, MacGregor, IJD, Mao, Y, Markov, N, Martinez, D, Mayer, M, McKinnon, B, Meyer, CA, Mineeva, T, Mirazita, M, Mokeev, V, Moutarde, H, Munevar, E, Munoz Camacho, C, Nadel-Turonski, P, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, AI, Pappalardo, LL, Paremuzyan, R, Park, K, Park, S, Pasyuk, E, Anefalos Pereira, S, Phelps, E, Pisano, S, Pogorelko, O, Pozdniakov, S, Price, JW, Procureur, S, Prok, Y, Protopopescu, D, Puckett, AJR, Raue, BA, Ricco, G, Rimal, D, Ripani, M, Rosner, G, Rossi, P, Sabatié, F, Saini, MS, Salgado, C, Saylor, N, Schott, D, Schumacher, RA, Seder, E, Seraydaryan, H, Sharabian, YG, Smith, GD, Sober, DI, Sokhan, D, Stepanyan, SS, Stepanyan, S, Strauch, S, Taiuti, M, Tang, W, Taylor, CE, Tian, Y, Tkachenko, S, Ungaro, M, Vineyard, MF, Vlassov, A, Voskanyan, H, Voutier, E, Walford, NK, Watts, DP, Weinstein, LB, Weygand, DP, Wood, MH, Zachariou, N, Zhang, J, Zhao, ZW & Zonta, I 2012, 'Measurement of exclusive π0 electroproduction structure functions and their relationship to transverse generalized parton distributions', Physical Review Letters, vol. 109, no. 11, 112001. https://doi.org/10.1103/PhysRevLett.109.112001

TY - JOUR

T1 - Measurement of exclusive π0 electroproduction structure functions and their relationship to transverse generalized parton distributions

AU - Bedlinskiy, I.

AU - Kubarovsky, V.

AU - Niccolai, S.

AU - Stoler, P.

AU - Adhikari, K. P.

AU - Aghasyan, M.

AU - Amaryan, M. J.

AU - Anghinolfi, M.

AU - Avakian, H.

AU - Baghdasaryan, H.

AU - Ball, J.

AU - Baltzell, N. A.

AU - Battaglieri, M.

AU - Bennett, R. P.

AU - Biselli, A. S.

AU - Bookwalter, C.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Carman, D. S.

AU - Celentano, A.

AU - Chandavar, S.

AU - Charles, G.

AU - Contalbrigo, M.

AU - Crede, V.

AU - D'Angelo, A.

AU - Daniel, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Deur, A.

AU - Djalali, C.

AU - Doughty, D.

AU - Dupre, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Fegan, S.

AU - Fleming, J. A.

AU - Forest, T. A.

AU - Fradi, A.

AU - Garçon, M.

AU - Gevorgyan, N.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Gohn, W.

AU - Gothe, R. W.

AU - Graham, L.

AU - Griffioen, K. A.

AU - Guegan, B.

AU - Guidal, M.

AU - Guo, L.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Heddle, D.

AU - Hicks, K.

AU - Holtrop, M.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Jo, H. S.

AU - Joo, K.

AU - Keller, D.

AU - Khandaker, M.

AU - Khetarpal, P.

AU - Kim, A.

AU - Kim, W.

AU - Klein, F. J.

AU - Koirala, S.

AU - Kubarovsky, A.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Kvaltine, N. D.

AU - Livingston, K.

AU - Lu, H. Y.

AU - MacGregor, I. J.D.

AU - Mao, Y.

AU - Markov, N.

AU - Martinez, D.

AU - Mayer, M.

AU - McKinnon, B.

AU - Meyer, C. A.

AU - Mineeva, T.

AU - Mirazita, M.

AU - Mokeev, V.

AU - Moutarde, H.

AU - Munevar, E.

AU - Munoz Camacho, C.

AU - Nadel-Turonski, P.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Pappalardo, L. L.

AU - Paremuzyan, R.

AU - Park, K.

AU - Park, S.

AU - Pasyuk, E.

AU - Anefalos Pereira, S.

AU - Phelps, E.

AU - Pisano, S.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Procureur, S.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Puckett, A. J.R.

AU - Raue, B. A.

AU - Ricco, G.

AU - Rimal, D.

AU - Ripani, M.

AU - Rosner, G.

AU - Rossi, P.

AU - Sabatié, F.

AU - Saini, M. S.

AU - Salgado, C.

AU - Saylor, N.

AU - Schott, D.

AU - Schumacher, R. A.

AU - Seder, E.

AU - Seraydaryan, H.

AU - Sharabian, Y. G.

AU - Smith, G. D.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Stepanyan, S. S.

AU - Stepanyan, S.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tang, W.

AU - Taylor, C. E.

AU - Tian, Ye

AU - Tkachenko, S.

AU - Ungaro, M.

AU - Vineyard, M. F.

AU - Vlassov, A.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Walford, N. K.

AU - Watts, D. P.

AU - Weinstein, L. B.

AU - Weygand, D. P.

AU - Wood, M. H.

AU - Zachariou, N.

AU - Zhang, J.

AU - Zhao, Z. W.

AU - Zonta, I.

PY - 2012/9/10

Y1 - 2012/9/10

N2 - Exclusive π0 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 Q2, x B, t, and π, in the Q2 range from 1.0 to 4.6GeV2, -t up to 2GeV2, and x B from 0.1 to 0.58. Structure functions σ T+σ L, σ TT, and σ LT were extracted as functions of t for each of 17 combinations of Q2 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+σ 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 π0 electroproduction offers direct experimental access to the transversity GPDs.

AB - Exclusive π0 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 Q2, x B, t, and π, in the Q2 range from 1.0 to 4.6GeV2, -t up to 2GeV2, and x B from 0.1 to 0.58. Structure functions σ T+σ L, σ TT, and σ LT were extracted as functions of t for each of 17 combinations of Q2 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+σ 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 π0 electroproduction offers direct experimental access to the transversity GPDs.

UR - https://www.scopus.com/pages/publications/84866135700

U2 - 10.1103/PhysRevLett.109.112001

DO - 10.1103/PhysRevLett.109.112001

M3 - Article

AN - SCOPUS:84866135700

SN - 0031-9007

VL - 109

JO - Physical Review Letters

JF - Physical Review Letters

IS - 11

M1 - 112001

ER -

Measurement of exclusive π0 electroproduction structure functions and their relationship to transverse generalized parton distributions

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