Hard exclusive pion electroproduction at backward angles with CLAS

K. Park M. Guidal 1 W. Gothe B. Pire 2 K. Semenov-Tian-Shansky 3 J. Laget P. Adhikari S. Adhikari Z. Akbar H. Avakian 4 J. Ball I. Balossino 5 N. Baltzell L. Barion M. Battaglieri I. Bedlinskiy S. Biselli J. Briscoe W. Brooks D. Burkert F. Cao S. Carman A. Celentano 6 G. Charles T. Chetry G. Ciullo L. Clark P. Cole M. Contalbrigo V. Crede A. D'Angelo N. Dashyan R. De Vita E. De Sanctis M. Defurne 7 A. Deur C. Djalali 1 R. Dupre 1 H. Egiyan A. El Alaoui L. El Fassi L. Elouadrhiri P. Eugenio G. Fedotov R. Fersch A. Filippi 5 M. Garçon 8 Y. Ghandilyan P. Gilfoyle X. Girod 7 E. Golovatch A. Griffioen L. Guo 9 K. Hafidi H. Hakobyan C. Hanretty N. Harrison M. Hattawy 1 D. Heddle K. Hicks M. Holtrop E. Hyde 10 Y. Ilieva D. Ireland S. Ishkhanov E. Isupov D. Jenkins S. Johnston 11 K. Joo M. Kabir 12 D. Keller G. Khachatryan M. Khachatryan M. Khandaker 13 W. Kim J. Klein 14 V. Kubarovsky Estelle Kuhn L. Lanza K. Livingston J. Macgregor N. Markov B. Mckinnon M. Mirazita 13 V. Mokeev 1 R.A. Montgomery C. Munoz Camacho P. Nadel-Turonski S. Niccolai 1 G. Niculescu M. Osipenko M. Paolone R. Paremuzyan 1 E. Pasyuk W. Phelps O. Pogorelko J. Poudel J. Price Y. Prok 10 D. Protopopescu M. Ripani A. Rizzo 15 P. Rossi F. Sabatié 7 C. Salgado R.A. Schumacher Y. Sharabian Iu. Skorodumina D. Smith 16 D. Sokhan 1 N. Sparveris S. Stepanyan I.I. Strakovsky S. Strauch M. Taiuti J. Tan M. Ungaro H. Voskanyan E. Voutier X. Wei 17 N. Zachariou J. Zhang 18
Abstract : We report on the first measurement of cross sections for exclusive deeply virtual pion electroproduction off the proton, ep → e′nπ+, above the resonance region at backward pion center-of-mass angles. The φ -dependent cross sections were measured, from which we extracted three combinations of structure functions of the proton. Our results are compatible with calculations based on nucleon-to-pion transition distribution amplitudes (TDAs). These non-perturbative objects are defined as matrix elements of three- quark-light-cone-operators and characterize partonic correlations with a particular emphasis on baryon charge distribution inside a nucleon.
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https://hal.archives-ouvertes.fr/hal-01754761
Contributeur : Bernard Pire <>
Soumis le : vendredi 30 mars 2018 - 10:07:43
Dernière modification le : mardi 5 mars 2019 - 09:30:11

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K. Park, M. Guidal, W. Gothe, B. Pire, K. Semenov-Tian-Shansky, et al.. Hard exclusive pion electroproduction at backward angles with CLAS. Physics Letters B, Elsevier, 2018, 780, pp.340 - 345. 〈10.1016/j.physletb.2018.03.026〉. 〈hal-01754761〉

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