학술논문
A multidimensional study of the structure function ratio σLT′/σ0 from hard exclusive π+ electro-production off protons in the GPD regime
Document Type
article
Author
S. Diehl; A. Kim; K. Joo; P. Achenbach; Z. Akbar; M.J. Amaryan; H. Atac; H. Avagyan; C. Ayerbe Gayoso; L. Baashen; L. Barion; M. Bashkanov; M. Battaglieri; I. Bedlinskiy; B. Benkel; F. Benmokhtar; A. Bianconi; A.S. Biselli; M. Bondi; W.A. Booth; F. Bossù; S. Boiarinov; K.-Th. Brinkmann; W.J. Briscoe; S. Bueltmann; D. Bulumulla; V.D. Burkert; D.S. Carman; A. Celentano; P. Chatagnon; V. Chesnokov; T. Chetry; G. Ciullo; G. Clash; P.L. Cole; M. Contalbrigo; G. Costantini; A. D'Angelo; N. Dashyan; R. De Vita; M. Defurne; A. Deur; C. Djalali; R. Dupre; H. Egiyan; M. Ehrhart; A. El Alaoui; L. El Fassi; L. Elouadrhiri; S. Fegan; A. Filippi; G. Gavalian; Y. Ghandilyan; G.P. Gilfoyle; D.I. Glazier; A.A. Golubenko; G. Gosta; R.W. Gothe; Y. Gotra; K.A. Griffioen; M. Guidal; K. Hafidi; H. Hakobyan; M. Hattawy; T.B. Hayward; D. Heddle; A. Hobart; M. Holtrop; Y. Ilieva; D.G. Ireland; E.L. Isupov; H.S. Jo; M. Khachatryan; A. Khanal; W. Kim; A. Kripko; V. Kubarovsky; V. Lagerquist; J.-M. Laget; L. Lanza; M. Leali; S. Lee; P. Lenisa; X. Li; K. Livingston; I. .J .D. MacGregor; D. Marchand; V. Mascagna; B. McKinnon; Z.E. Meziani; S. Migliorati; T. Mineeva; M. Mirazita; V. Mokeev; E. Molina; R.A. Montgomery; C. Munoz Camacho; P. Nadel-Turonski; P. Naidoo; K. Neupane; S. Niccolai; M. Nicol; G. Niculescu; M. Osipenko; M. Ouillon; P. Pandey; M. Paolone; L.L. Pappalardo; R. Paremuzyan; E. Pasyuk; S.J. Paul; W. Phelps; N. Pilleux; M. Pokhrel; J. Poudel; J.W. Price; Y. Prok; T. Reed; J. Richards; M. Ripani; J. Ritman; P. Rossi; F. Sabatié; C. Salgado; S. Schadmand; A. Schmidt; Y. Sharabian; E.V. Shirokov; U. Shrestha; P. Simmerling; D. Sokhan; N. Sparveris; M. Spreafico; S. Stepanyan; I.I. Strakovsky; S. Strauch; J.A. Tan; N. Trotta; M. Turisini; R. Tyson; M. Ungaro; S. Vallarino; L. Venturelli; H. Voskanyan; E. Voutier; D.P. Watts; X. Wei; R. Williams; R. Wishart; M.H. Wood; N. Zachariou; J. Zhang; Z.W. Zhao; M. Zurek
Source
Physics Letters B, Vol 839, Iss , Pp 137761- (2023)
Subject
Language
English
ISSN
0370-2693
Abstract
A multidimensional extraction of the structure function ratio σLT′/σ0 from the hard exclusive e→p→e′nπ+ reaction above the resonance region has been performed. The study was done based on beam-spin asymmetry measurements using a 10.6 GeV incident electron beam on a liquid-hydrogen target and the CLAS12 spectrometer at Jefferson Lab. The measurements focus on the very forward regime (t/Q2 ≪ 1) with a wide kinematic range of xB in the valence regime (0.17 < xB < 0.55), and virtualities Q2 ranging from 1.5 GeV2 up to 6 GeV2. The results and their comparison to theoretical models based on Generalized Parton Distributions demonstrate the sensitivity to chiral-odd GPDs and the directly related tensor charge of the nucleon. In addition, the data is compared to an extension of a Regge formalism at high photon virtualities. It was found that the Regge model provides a better description at low Q2, while the GPD model is more appropriate at high Q2.