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24 April 2024

» arxiv » 2010.09544

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Beam spin asymmetry in semi-inclusive electroproduction of a hadron pair
M. Mirazita ; H. Avakian ; A. Courtoy ; S. Pisano ; S. Adhikari ; M.J. Amaryan ; G. Angelini ; H. Atac ; N.A. Baltzell ; L. Barion ; M. Battaglieri ; I. Bedlinskiy ; Fatiha Benmokhtar ; A. Bianconi ; A.S. Biselli ; F. Bossu' ; S. Boiarinov ; W.J. Briscoe ; W.K. Brooks ; D. Bulumulla ; V.D. Burkert ; D.S. Carman ; J.C. Carvajal ; A. Celentano ; P. Chatagnon ; T. Chetry ; G. Ciullo ; B. Clary ; P.L. Cole ; M. Contalbrigo ; V. Crede ; A. D'Angelo ; N. Dashyan ; R. De Vita ; M. Defurne ; A. Deur ; S. Diehl ; C. Dilks ; C. Djalali ; R. Dupre ; H. Egiyan ; M. Ehrhart ; A. El Alaoui ; L. El Fassi ; P. Eugenio ; S. Fegan ; R. Fersch ; A. Filippi ; T.A. Forest ; Y. Ghandilyan ; G. Gavalian ; G.P. Gilfoyle ; K.L. Giovanetti ; F.X. Girod ; D.I. Glazier ; E. Golovatch ; R.W. Gothe ; K.A. Griffioen ; M. Guidal ; L. Guo ; K. Hafidi ; H. Hakobyan ; M. Hattawy ; T.B. Hayward ; D. Heddle ; K. Hicks ; A. Hobart ; M. Holtrop ; Q. Huang ; Y. Ilieva ; D.G. Ireland ; B.S. Ishkhanov ; E.L. Isupov ; D. Jenkins ; H.S. Jo ; K. Joo ; D. Keller ; A. Khanal ; M. Khandaker ; C.W. Kim ; W. Kim ; F.J. Klein ; V. Kubarovsky ; S.E. Kuhn ; L. Lanza ; M. Leali ; P. Lenisa ; K. Livingston ; I .J .D. MacGregor ; D. Marchand ; N. Markov ; L. Marsicano ; V. Mascagna ; B. McKinnon ; R.G. Milner ; T. Mineeva ; V. Mokeev ; C. Mullen ; C. Munoz Camacho ; K. Neupane ; G. Niculescu ; T. O'Connell ; M. Osipenko ; M. Paolone ; L.L. Pappalardo ; R. Paremuzyan ; K. Park ; E. Pasyuk ; W. Phelps ; D. Pocanic ; O. Pogorelko ; J. Poudel ; Y. Prok ; B.A. Raue ; M. Ripani ; J. Ritman ; A. Rizzo ; P. Rossi ; F. Sabatie' ; C. Salgado ; A. Schmidt ; R.A. Schumacher ; Y.G. Sharabian ; U. Shrestha ; O. Soto ; N. Sparveris ; S. Stepanyan ; I.I. Strakovsky ; S. Strauch ; N. Tyler ; M. Ungaro ; L. Venturelli ; H. Voskanyan ; A. Vossen ; E. Voutier ; D. Watts ; K. Wei ; X. Wei ; M.H. Wood ; B. Yale ; N. Zachariou ; J. Zhang ; Z.W. Zhao ;
Date:	19 Oct 2020
Abstract:	A first measurement of the longitudinal beam spin asymmetry ALU in the semi-inclusive electroproduction of pairs of charged pions is reported. ALU is a higher-twist observable and offers the cleanest access to the nucleon twist-3 parton distribution function e(x). Data have been collected in the Hall-B at Jefferson Lab by impinging a 5.498 GeV electron beam on a liquid-hydrogen target, and reconstructing the scattered electron and the pion pair with the CLAS detector. One-dimensional projections of the sin(phiR) moments of ALU are extracted for the kinematic variables of interest in the valence quark region. The understanding of di-hadron production is essential for the interpretation of observables in single hadron production in semi-inclusive DIS, and pioneering measurements of single spin asymmetries in di-hadron production open a new avenue in studies of QCD dynamics.
Source:	arXiv, 2010.09544
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