Beam spin asymmetry in semi-inclusive electroproduction of a hadron pair
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.
Keywords
Cite
@article{arxiv.2010.09544,
title = {Beam spin asymmetry in semi-inclusive electroproduction of a hadron pair},
author = {M. Mirazita and H. Avakian and A. Courtoy and S. Pisano and S. Adhikari and M. J. Amaryan and G. Angelini and H. Atac and N. A. Baltzell and L. Barion and M. Battaglieri and I. Bedlinskiy and Fatiha Benmokhtar and A. Bianconi and A. S. Biselli and F. Bossu' and S. Boiarinov and W. J. Briscoe and W. K. Brooks and D. Bulumulla and V. D. Burkert and D. S. Carman and J. C. Carvajal and A. Celentano and P. Chatagnon and T. Chetry and G. Ciullo and B. Clary and P. L. Cole and M. Contalbrigo and V. Crede and A. D'Angelo and N. Dashyan and R. De Vita and M. Defurne and A. Deur and S. Diehl and C. Dilks and C. Djalali and R. Dupre and H. Egiyan and M. Ehrhart and A. El Alaoui and L. El Fassi and P. Eugenio and S. Fegan and R. Fersch and A. Filippi and T. A. Forest and Y. Ghandilyan and G. Gavalian and G. P. Gilfoyle and K. L. Giovanetti and F. X. Girod and D. I. Glazier and E. Golovatch and R. W. Gothe and K. A. Griffioen and M. Guidal and L. Guo and K. Hafidi and H. Hakobyan and M. Hattawy and T. B. Hayward and D. Heddle and K. Hicks and A. Hobart and M. Holtrop and Q. Huang and Y. Ilieva and D. G. Ireland and B. S. Ishkhanov and E. L. Isupov and D. Jenkins and H. S. Jo and K. Joo and D. Keller and A. Khanal and M. Khandaker and C. W. Kim and W. Kim and F. J. Klein and V. Kubarovsky and S. E. Kuhn and L. Lanza and M. Leali and P. Lenisa and K. Livingston and I . J . D. MacGregor and D. Marchand and N. Markov and L. Marsicano and V. Mascagna and B. McKinnon and R. G. Milner and T. Mineeva and V. Mokeev and C. Mullen and C. Munoz Camacho and K. Neupane and G. Niculescu and T. O'Connell and M. Osipenko and M. Paolone and L. L. Pappalardo and R. Paremuzyan and K. Park and E. Pasyuk and W. Phelps and D. Pocanic and O. Pogorelko and J. Poudel and Y. Prok and B. A. Raue and M. Ripani and J. Ritman and A. Rizzo and P. Rossi and F. Sabatie' and C. Salgado and A. Schmidt and R. A. Schumacher and Y. G. Sharabian and U. Shrestha and O. Soto and N. Sparveris and S. Stepanyan and I. I. Strakovsky and S. Strauch and N. Tyler and M. Ungaro and L. Venturelli and H. Voskanyan and A. Vossen and E. Voutier and D. Watts and K. Wei and X. Wei and M. H. Wood and B. Yale and N. Zachariou and J. Zhang and Z. W. Zhao},
journal= {arXiv preprint arXiv:2010.09544},
year = {2021}
}