Deep exclusive $\pi^+$ electroproduction off the proton at CLAS
Abstract
The exclusive electroproduction of above the resonance region was studied using the Large Acceptance Spectrometer () at Jefferson Laboratory by scattering a 6 GeV continuous electron beam off a hydrogen target. The large acceptance and good resolution of , together with the high luminosity, allowed us to measure the cross section for the process in 140 (, , ) bins: , 1.6 GeV GeV and 0.1 GeV GeV. For most bins, the statistical accuracy is on the order of a few percent. Differential cross sections are compared to two theoretical models, based either on hadronic (Regge phenomenology) or on partonic (handbag diagram) degrees of freedom. Both can describe the gross features of the data reasonably well, but differ strongly in their ingredients. If the handbag approach can be validated in this kinematical region, our data contain the interesting potential to experimentally access transversity Generalized Parton Distributions.
Keywords
Cite
@article{arxiv.1206.2326,
title = {Deep exclusive $\pi^+$ electroproduction off the proton at CLAS},
author = {K. Park and M. Guidal and R. W. Gothe and J. M. Laget and M. Garçon and K. P. Adhikari and M. Aghasyan and M. J. Amaryan and M. Anghinolfi and H. Avakian and H. Baghdasaryan and J. Ball and N. A. Baltzell and M. Battaglieri and I. Bedlinsky and R. P. Bennett and A. S. Biselli and C. Bookwalter and S. Boiarinov and W. J. Briscoe and W. K. Brooks and V. D. Burkert and D. S. Carman 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 R. De Vita and E. De Sanctis and A. Deur and C. Djalali and G. E. Dodge and D. Doughty and R. Dupre and H. Egiyan and A. El Alaoui and L. El Fassi and A. Fradi and P. Eugenio and G. Fedotov and S. Fegan and J. A. Fleming and T. A. Forest and N. Gevorgyan and G. P. Gilfoyle and K. L. Giovanetti and F. X. Girod and W. Gohn and E. Golovatch and L. Graham and K. A. Griffioen and B. Guegan and L. Guo and K. Hafidi and H. Hakobyan and C. Hanretty and D. Heddle and K. Hicks and D. Ho and M. Holtrop and Y. Ilieva and D. G. Ireland and B. S. Ishkhanov and D. Jenkins and H. S. Jo and D. Keller and M. Khandaker and P. Khetarpal and A. Kim and W. Kim and F. J. Klein and S. Koirala and A. Kubarovsky and V. Kubarovsky and S. E. Kuhn and S. V. Kuleshov and K. Livingston and H. Y. Lu and I. J. D. MacGregor and Y. Mao and N. Markov and D. Martinez and M. Mayer and B. McKinnon and C. A. Meyer and T. Mineeva and M. Mirazita and V. Mokeev and H. Moutarde and E. Munevar and C. Munoz Camacho and P. Nadel-Turonski and C. S. Nepali and S. Niccolai and G. Niculescu and I. Niculescu and M. Osipenko and A. I. Ostrovidov and L. L. Pappalardo and R. Paremuzyan and S. Park and E. Pasyuk and S. Anefalos Pereira and E. Phelps and S. Pisano and O. Pogorelko and S. Pozdniakov and J. W. Price and S. Procureur and D. Protopopescu and A. J. R. Puckett and B. A. Raue and G. Ricco and D. Rimal and M. Ripani and G. Rosner and P. Rossi and F. Sabatie and M. S. Saini and C. Salgado and D. Schott and R. A. Schumacher and E. Seder and H. Seraydaryan and Y. G. Sharabian and E. S. Smith and G. D. Smith and D. I. Sober and D. Sokhan and S. S. Stepanyan and P. Stoler and I. I. Strakovsky and S. Strauch and M. Taiuti and W. Tang and C. E. Taylor and Ye Tian and S. Tkachenko and A. Trivedi and M. Ungaro and B . Vernarsky and H. Voskanyan and E. Voutier and N. K. Walford and D. P. Watts and L. B. Weinstein and D. P. Weygand and M. H. Wood and N. Zachariou and J. Zhang and Z. W. Zhao and I. Zonta},
journal= {arXiv preprint arXiv:1206.2326},
year = {2013}
}
Comments
18pages, 21figures,2tables