Exclusive ρ0 electroproduction on the proton at CLAS

S. A. Morrow; M. Guidal; M. Garçon; J. M. Laget; E. S. Smith; G. Adams; K. P. Adhikari; M. Aghasyan; M. J. Amaryan; M. Anghinolfi; G. Asryan; G. Audit; H. Avakian; H. Bagdasaryan; N. Baillie; J. P. Ball; N. A. Baltzell; S. Barrow; M. Battaglieri; I. Bedlinskiy; M. Bektasoglu; M. Bellis; N. Benmouna; B. L. Berman; A. S. Biselli; L. Blaszczyk; B. E. Bonner; C. Bookwalter; 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; B. Carnahan; L. Casey; A. Cazes; S. Chen; L. Cheng; P. L. Cole; P. Collins; P. Coltharp; D. Cords; P. Corvisiero; D. Crabb; H. Crannell; V. Crede; J. P. Cummings; D. Dale; N. Dashyan; R. De Masi; R. De Vita; E. De Sanctis; P. V. Degtyarenko; H. Denizli; L. Dennis; A. Deur; S. Dhamija; K. V. Dharmawardane; K. S. Dhuga; R. Dickson; J. P. Didelez; C. Djalali; G. E. Dodge; D. Doughty; Michael Dugger; S. Dytman; O. P. Dzyubak; H. Egiyan; K. S. Egiyan; L. El Fassi; L. Elouadrhiri; P. Eugenio; R. Fatemi; G. Fedotov; R. Fersch; R. J. Feuerbach; T. A. Forest; A. Fradi; G. Gavalian; N. Gevorgyan; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; W. Gohn; C. I O Gordon; R. W. Gothe; L. Graham; K. A. Griffioen; M. Guillo; N. Guler; L. Guo; V. Gyurjyan; C. Hadjidakis; K. Hafidi; H. Hakobyan; C. Hanretty; J. Hardie; N. Hassall; D. Heddle; F. W. Hersman; K. Hicks; I. Hleiqawi; M. Holtrop; E. Hourany; 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; D. Keller; J. D. Kellie; M. Khandaker; P. Khetarpal; W. Kim; A. Klein; F. J. Klein; A. V. Klimenko; M. Kossov; L. H. Kramer; V. Kubarovsky; J. Kuhn; S. E. Kuhn; S. V. Kuleshov; V. Kuznetsov; J. Lachniet; J. Langheinrich; D. Lawrence; Ji Li; K. Livingston; H. Y. Lu; M. MacCormick; C. Marchand; N. Markov; P. Mattione; S. McAleer; M. McCracken; B. McKinnon; J. W C McNabb; B. A. Mecking; S. Mehrabyan; J. J. Melone; M. D. Mestayer; C. A. Meyer; T. Mibe; K. Mikhailov; R. Minehart; M. Mirazita; R. Miskimen; V. Mokeev; L. Morand; B. Moreno; K. Moriya; M. Moteabbed; J. Mueller; 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; G. V. O'Rielly; M. Osipenko; A. I. Ostrovidov; K. Park; S. Park; E. Pasyuk; C. Paterson; S. Anefalos Pereira; S. A. Philips; J. Pierce; N. Pivnyuk; D. Pocanic; O. Pogorelko; E. Polli; I. Popa; S. Pozdniakov; B. M. Preedom; J. W. Price; S. Procureur; Y. Prok; D. Protopopescu; L. M. Qin; B. A. Raue; G. Riccardi; G. Ricco; M. Ripani; Barry Ritchie; G. Rosner; P. Rossi; P. D. Rubin; F. Sabatié; M. S. Saini; J. Salamanca; C. Salgado; J. P. Santoro; V. Sapunenko; D. Schott; R. A. Schumacher; V. S. Serov; Y. G. Sharabian; D. Sharov; N. V. Shvedunov; A. V. Skabelin; L. C. Smith; D. I. Sober; D. Sokhan; A. Stavinsky; S. S. Stepanyan; S. Stepanyan; B. E. Stokes; P. Stoler; I. I. Strakovsky; S. Strauch; M. Taiuti; D. J. Tedeschi; A. Tkabladze; S. Tkachenko; L. Todor; C. Tur; M. Ungaro; M. F. Vineyard; A. V. Vlassov; D. P. Watts; L. B. Weinstein; D. P. Weygand; M. Williams; E. Wolin; M. H. Wood; A. Yegneswaran; M. Yurov; L. Zana; J. Zhang; B. Zhao; Z. W. Zhao

doi:10.1140/epja/i2008-10683-5

Exclusive ρ⁰ electroproduction on the proton at CLAS

S. A. Morrow, M. Guidal, M. Garçon, J. M. Laget, E. S. Smith, G. Adams, K. P. Adhikari, M. Aghasyan, M. J. Amaryan, M. Anghinolfi, G. Asryan, G. Audit, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, S. Barrow, M. Battaglieri, I. BedlinskiyM. Bektasoglu, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, B. E. Bonner, C. Bookwalter, 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, B. Carnahan, L. Casey, A. Cazes, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, V. Crede, J. P. Cummings, D. Dale, N. Dashyan, R. De Masi, R. De Vita, E. De Sanctis, P. V. Degtyarenko, H. Denizli, L. Dennis, A. Deur, S. Dhamija, K. V. Dharmawardane, K. S. Dhuga, R. Dickson, J. P. Didelez, C. Djalali, G. E. Dodge, D. Doughty, Michael Dugger, S. Dytman, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, L. Elouadrhiri, P. Eugenio, R. Fatemi, G. Fedotov, R. Fersch, R. J. Feuerbach, T. A. Forest, A. Fradi, G. Gavalian, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, C. I O Gordon, R. W. Gothe, L. Graham, K. A. Griffioen, M. Guillo, N. Guler, L. Guo, V. Gyurjyan, C. Hadjidakis, K. Hafidi, H. Hakobyan, C. Hanretty, J. Hardie, N. Hassall, D. Heddle, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, E. Hourany, 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, D. Keller, J. D. Kellie, M. Khandaker, P. Khetarpal, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Kossov, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, V. Kuznetsov, J. Lachniet, J. Langheinrich, D. Lawrence, Ji Li, K. Livingston, H. Y. Lu, M. MacCormick, C. Marchand, N. Markov, P. Mattione, S. McAleer, M. McCracken, B. McKinnon, J. W C McNabb, B. A. Mecking, S. Mehrabyan, J. J. Melone, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, R. Minehart, M. Mirazita, R. Miskimen, V. Mokeev, L. Morand, B. Moreno, K. Moriya, M. Moteabbed, J. Mueller, 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, G. V. O'Rielly, M. Osipenko, A. I. Ostrovidov, K. Park, S. Park, E. Pasyuk, C. Paterson, S. Anefalos Pereira, S. A. Philips, J. Pierce, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, I. Popa, S. Pozdniakov, B. M. Preedom, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, L. M. Qin, B. A. Raue, G. Riccardi, G. Ricco, M. Ripani, Barry Ritchie, G. Rosner, P. Rossi, P. D. Rubin, F. Sabatié, M. S. Saini, J. Salamanca, C. Salgado, J. P. Santoro, V. Sapunenko, D. Schott, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, N. V. Shvedunov, A. V. Skabelin, L. C. Smith, D. I. Sober, D. Sokhan, A. Stavinsky, S. S. Stepanyan, S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, A. Tkabladze, S. Tkachenko, L. Todor, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, M. Yurov, L. Zana, J. Zhang, B. Zhao, Z. W. Zhao

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

65 Scopus citations

Abstract

The ep → e ′ pρ⁰ reaction has been measured using the 5.754GeV electron beam of Jefferson Lab and the CLAS detector. This represents the largest ever set of data for this reaction in the valence region. Integrated and differential cross-sections are presented. The W , Q² and t dependences of the cross-section are compared to theoretical calculations based on the t -channel meson-exchange Regge theory, on the one hand, and on quark handbag diagrams related to Generalized Parton Distributions (GPDs) on the other hand. The Regge approach can describe at the ≈ 30% level most of the features of the present data while the two GPD calculations that are presented in this article which succesfully reproduce the high-energy data strongly underestimate the present data. The question is then raised whether this discrepancy originates from an incomplete or inexact way of modelling the GPDs or the associated hard scattering amplitude or whether the GPD formalism is simply inapplicable in this region due to higher-twists contributions, incalculable at present.

Original language	English (US)
Pages (from-to)	5-31
Number of pages	27
Journal	European Physical Journal A
Volume	39
Issue number	1
DOIs	https://doi.org/10.1140/epja/i2008-10683-5
State	Published - Jan 2009

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1140/epja/i2008-10683-5

Cite this

Morrow, S. A., Guidal, M., Garçon, M., Laget, J. M., Smith, E. S., Adams, G., Adhikari, K. P., Aghasyan, M., Amaryan, M. J., Anghinolfi, M., Asryan, G., Audit, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Baltzell, N. A., Barrow, S., Battaglieri, M., ... Zhao, Z. W. (2009). Exclusive ρ⁰ electroproduction on the proton at CLAS. European Physical Journal A, 39(1), 5-31. https://doi.org/10.1140/epja/i2008-10683-5

Morrow, SA, Guidal, M, Garçon, M, Laget, JM, Smith, ES, Adams, G, Adhikari, KP, Aghasyan, M, Amaryan, MJ, Anghinolfi, M, Asryan, G, Audit, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Barrow, S, Battaglieri, M, Bedlinskiy, I, Bektasoglu, M, Bellis, M, Benmouna, N, Berman, BL, Biselli, AS, Blaszczyk, L, Bonner, BE, Bookwalter, C, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bültmann, S, Burkert, VD, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Carnahan, B, Casey, L, Cazes, A, Chen, S, Cheng, L, Cole, PL, Collins, P, Coltharp, P, Cords, D, Corvisiero, P, Crabb, D, Crannell, H, Crede, V, Cummings, JP, Dale, D, Dashyan, N, De Masi, R, De Vita, R, De Sanctis, E, Degtyarenko, PV, Denizli, H, Dennis, L, Deur, A, Dhamija, S, Dharmawardane, KV, Dhuga, KS, Dickson, R, Didelez, JP, Djalali, C, Dodge, GE, Doughty, D, Dugger, M, Dytman, S, Dzyubak, OP, Egiyan, H, Egiyan, KS, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fatemi, R, Fedotov, G, Fersch, R, Feuerbach, RJ, Forest, TA, Fradi, A, Gavalian, G, Gevorgyan, N, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gohn, W, Gordon, CIO, Gothe, RW, Graham, L, Griffioen, KA, Guillo, M, Guler, N, Guo, L, Gyurjyan, V, Hadjidakis, C, Hafidi, K, Hakobyan, H, Hanretty, C, Hardie, J, Hassall, N, Heddle, D, Hersman, FW, Hicks, K, Hleiqawi, I, Holtrop, M, Hourany, E, 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, Keller, D, Kellie, JD, Khandaker, M, Khetarpal, P, Kim, W, Klein, A, Klein, FJ, Klimenko, AV, Kossov, M, Kramer, LH, Kubarovsky, V, Kuhn, J, Kuhn, SE, Kuleshov, SV, Kuznetsov, V, Lachniet, J, Langheinrich, J, Lawrence, D, Li, J, Livingston, K, Lu, HY, MacCormick, M, Marchand, C, Markov, N, Mattione, P, McAleer, S, McCracken, M, McKinnon, B, McNabb, JWC, Mecking, BA, Mehrabyan, S, Melone, JJ, Mestayer, MD, Meyer, CA, Mibe, T, Mikhailov, K, Minehart, R, Mirazita, M, Miskimen, R, Mokeev, V, Morand, L, Moreno, B, Moriya, K, Moteabbed, M, Mueller, J, Munevar, E, Mutchler, GS, Nadel-Turonski, P, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, BB, Niroula, MR, Niyazov, RA, Nozar, M, O'Rielly, GV, Osipenko, M, Ostrovidov, AI, Park, K, Park, S, Pasyuk, E, Paterson, C, Anefalos Pereira, S, Philips, SA, Pierce, J, Pivnyuk, N, Pocanic, D, Pogorelko, O, Polli, E, Popa, I, Pozdniakov, S, Preedom, BM, Price, JW, Procureur, S, Prok, Y, Protopopescu, D, Qin, LM, Raue, BA, Riccardi, G, Ricco, G, Ripani, M, Ritchie, B, Rosner, G, Rossi, P, Rubin, PD, Sabatié, F, Saini, MS, Salamanca, J, Salgado, C, Santoro, JP, Sapunenko, V, Schott, D, Schumacher, RA, Serov, VS, Sharabian, YG, Sharov, D, Shvedunov, NV, Skabelin, AV, Smith, LC, Sober, DI, Sokhan, D, Stavinsky, A, Stepanyan, SS, Stepanyan, S, Stokes, BE, Stoler, P, Strakovsky, II, Strauch, S, Taiuti, M, Tedeschi, DJ, Tkabladze, A, Tkachenko, S, Todor, L, Tur, C, Ungaro, M, Vineyard, MF, Vlassov, AV, Watts, DP, Weinstein, LB, Weygand, DP, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Yurov, M, Zana, L, Zhang, J, Zhao, B & Zhao, ZW 2009, 'Exclusive ρ⁰ electroproduction on the proton at CLAS', European Physical Journal A, vol. 39, no. 1, pp. 5-31. https://doi.org/10.1140/epja/i2008-10683-5

@article{89786538c6454a56873a5afd3bde2548,

title = "Exclusive ρ0 electroproduction on the proton at CLAS",

abstract = "The ep → e ′ pρ0 reaction has been measured using the 5.754GeV electron beam of Jefferson Lab and the CLAS detector. This represents the largest ever set of data for this reaction in the valence region. Integrated and differential cross-sections are presented. The W , Q2 and t dependences of the cross-section are compared to theoretical calculations based on the t -channel meson-exchange Regge theory, on the one hand, and on quark handbag diagrams related to Generalized Parton Distributions (GPDs) on the other hand. The Regge approach can describe at the ≈ 30% level most of the features of the present data while the two GPD calculations that are presented in this article which succesfully reproduce the high-energy data strongly underestimate the present data. The question is then raised whether this discrepancy originates from an incomplete or inexact way of modelling the GPDs or the associated hard scattering amplitude or whether the GPD formalism is simply inapplicable in this region due to higher-twists contributions, incalculable at present.",

author = "Morrow, {S. A.} and M. Guidal and M. Gar{\c c}on and Laget, {J. M.} and Smith, {E. S.} and G. Adams and Adhikari, {K. P.} and M. Aghasyan and Amaryan, {M. J.} and M. Anghinolfi and G. Asryan and G. Audit and H. Avakian and H. Bagdasaryan and N. Baillie and Ball, {J. P.} and Baltzell, {N. A.} and S. Barrow and M. Battaglieri and I. Bedlinskiy and M. Bektasoglu and M. Bellis and N. Benmouna and Berman, {B. L.} and Biselli, {A. S.} and L. Blaszczyk and Bonner, {B. E.} and C. Bookwalter 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 B. Carnahan and L. Casey and A. Cazes and S. Chen and L. Cheng and Cole, {P. L.} and P. Collins and P. Coltharp and D. Cords and P. Corvisiero and D. Crabb and H. Crannell and V. Crede and Cummings, {J. P.} and D. Dale and N. Dashyan and {De Masi}, R. and {De Vita}, R. and {De Sanctis}, E. and Degtyarenko, {P. V.} and H. Denizli and L. Dennis and A. Deur and S. Dhamija and Dharmawardane, {K. V.} and Dhuga, {K. S.} and R. Dickson and Didelez, {J. P.} and C. Djalali and Dodge, {G. E.} and D. Doughty and Michael Dugger and S. Dytman and Dzyubak, {O. P.} and H. Egiyan and Egiyan, {K. S.} and {El Fassi}, L. and L. Elouadrhiri and P. Eugenio and R. Fatemi and G. Fedotov and R. Fersch and Feuerbach, {R. J.} and Forest, {T. A.} and A. Fradi and G. Gavalian and N. Gevorgyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Goetz, {J. T.} and W. Gohn and Gordon, {C. I O} and Gothe, {R. W.} and L. Graham and Griffioen, {K. A.} and M. Guillo and N. Guler and L. Guo and V. Gyurjyan and C. Hadjidakis and K. Hafidi and H. Hakobyan and C. Hanretty and J. Hardie and N. Hassall and D. Heddle and Hersman, {F. W.} and K. Hicks and I. Hleiqawi and M. Holtrop and E. Hourany 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 D. Keller and Kellie, {J. D.} and M. Khandaker and P. Khetarpal and W. Kim and A. Klein and Klein, {F. J.} and Klimenko, {A. V.} and M. Kossov and Kramer, {L. H.} and V. Kubarovsky and J. Kuhn and Kuhn, {S. E.} and Kuleshov, {S. V.} and V. Kuznetsov and J. Lachniet and J. Langheinrich and D. Lawrence and Ji Li and K. Livingston and Lu, {H. Y.} and M. MacCormick and C. Marchand and N. Markov and P. Mattione and S. McAleer and M. McCracken and B. McKinnon and McNabb, {J. W C} and Mecking, {B. A.} and S. Mehrabyan and Melone, {J. J.} and Mestayer, {M. D.} and Meyer, {C. A.} and T. Mibe and K. Mikhailov and R. Minehart and M. Mirazita and R. Miskimen and V. Mokeev and L. Morand and B. Moreno and K. Moriya and M. Moteabbed and J. Mueller 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 O'Rielly, {G. V.} and M. Osipenko and Ostrovidov, {A. I.} and K. Park and S. Park and E. Pasyuk and C. Paterson and {Anefalos Pereira}, S. and Philips, {S. A.} and J. Pierce and N. Pivnyuk and D. Pocanic and O. Pogorelko and E. Polli and I. Popa and S. Pozdniakov and Preedom, {B. M.} and Price, {J. W.} and S. Procureur and Y. Prok and D. Protopopescu and Qin, {L. M.} and Raue, {B. A.} and G. Riccardi and G. Ricco and M. Ripani and Barry Ritchie and G. Rosner and P. Rossi and Rubin, {P. D.} and F. Sabati{\'e} and Saini, {M. S.} and J. Salamanca and C. Salgado and Santoro, {J. P.} and V. Sapunenko and D. Schott and Schumacher, {R. A.} and Serov, {V. S.} and Sharabian, {Y. G.} and D. Sharov and Shvedunov, {N. V.} and Skabelin, {A. V.} and Smith, {L. C.} and Sober, {D. I.} and D. Sokhan and A. Stavinsky and Stepanyan, {S. S.} and S. Stepanyan 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 L. Todor and C. Tur and M. Ungaro and Vineyard, {M. F.} and Vlassov, {A. V.} 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 M. Yurov and L. Zana and J. Zhang and B. Zhao and Zhao, {Z. W.}",

year = "2009",

month = jan,

doi = "10.1140/epja/i2008-10683-5",

language = "English (US)",

volume = "39",

pages = "5--31",

journal = "European Physical Journal A",

issn = "1434-6001",

publisher = "Springer New York",

number = "1",

}

TY - JOUR

T1 - Exclusive ρ0 electroproduction on the proton at CLAS

AU - Morrow, S. A.

AU - Guidal, M.

AU - Garçon, M.

AU - Laget, J. M.

AU - Smith, E. S.

AU - Adams, G.

AU - Adhikari, K. P.

AU - Aghasyan, M.

AU - Amaryan, M. J.

AU - Anghinolfi, M.

AU - Asryan, G.

AU - Audit, G.

AU - Avakian, H.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J. P.

AU - Baltzell, N. A.

AU - Barrow, S.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Bektasoglu, M.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Blaszczyk, L.

AU - Bonner, B. E.

AU - Bookwalter, C.

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 - Carnahan, B.

AU - Casey, L.

AU - Cazes, A.

AU - Chen, S.

AU - Cheng, L.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Cords, D.

AU - Corvisiero, P.

AU - Crabb, D.

AU - Crannell, H.

AU - Crede, V.

AU - Cummings, J. P.

AU - Dale, D.

AU - Dashyan, N.

AU - De Masi, R.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Degtyarenko, P. V.

AU - Denizli, H.

AU - Dennis, L.

AU - Deur, A.

AU - Dhamija, S.

AU - Dharmawardane, K. V.

AU - Dhuga, K. S.

AU - Dickson, R.

AU - Didelez, J. P.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Doughty, D.

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PY - 2009/1

Y1 - 2009/1

N2 - The ep → e ′ pρ0 reaction has been measured using the 5.754GeV electron beam of Jefferson Lab and the CLAS detector. This represents the largest ever set of data for this reaction in the valence region. Integrated and differential cross-sections are presented. The W , Q2 and t dependences of the cross-section are compared to theoretical calculations based on the t -channel meson-exchange Regge theory, on the one hand, and on quark handbag diagrams related to Generalized Parton Distributions (GPDs) on the other hand. The Regge approach can describe at the ≈ 30% level most of the features of the present data while the two GPD calculations that are presented in this article which succesfully reproduce the high-energy data strongly underestimate the present data. The question is then raised whether this discrepancy originates from an incomplete or inexact way of modelling the GPDs or the associated hard scattering amplitude or whether the GPD formalism is simply inapplicable in this region due to higher-twists contributions, incalculable at present.

AB - The ep → e ′ pρ0 reaction has been measured using the 5.754GeV electron beam of Jefferson Lab and the CLAS detector. This represents the largest ever set of data for this reaction in the valence region. Integrated and differential cross-sections are presented. The W , Q2 and t dependences of the cross-section are compared to theoretical calculations based on the t -channel meson-exchange Regge theory, on the one hand, and on quark handbag diagrams related to Generalized Parton Distributions (GPDs) on the other hand. The Regge approach can describe at the ≈ 30% level most of the features of the present data while the two GPD calculations that are presented in this article which succesfully reproduce the high-energy data strongly underestimate the present data. The question is then raised whether this discrepancy originates from an incomplete or inexact way of modelling the GPDs or the associated hard scattering amplitude or whether the GPD formalism is simply inapplicable in this region due to higher-twists contributions, incalculable at present.

UR - http://www.scopus.com/inward/record.url?scp=60649083568&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=60649083568&partnerID=8YFLogxK

U2 - 10.1140/epja/i2008-10683-5

DO - 10.1140/epja/i2008-10683-5

M3 - Article

AN - SCOPUS:60649083568

SN - 1434-6001

VL - 39

SP - 5

EP - 31

JO - European Physical Journal A

JF - European Physical Journal A

IS - 1

ER -

Exclusive ρ⁰ electroproduction on the proton at CLAS

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