作者
TB Hayward, C Dilks, A Vossen, H Avakian, S Adhikari, G Angelini, M Arratia, H Atac, C Ayerbe Gayoso, NA Baltzell, L Barion, M Battaglieri, I Bedlinskiy, F Benmokhtar, A Bianconi, AS Biselli, M Bondì, F Bossù, S Boiarinov, WJ Briscoe, WK Brooks, D Bulumulla, VD Burkert, DS Carman, JC Carvajal, A Celentano, P Chatagnon, T Chetry, G Ciullo, BA Clary, PL Cole, M Contalbrigo, G Costantini, V Crede, A D’Angelo, N Dashyan, R De Vita, M Defurne, A Deur, S Diehl, C Djalali, R Dupre, M Dugger, H Egiyan, M Ehrhart, A El Alaoui, L El Fassi, L Elouadrhiri, S Fegan, A Filippi, TA Forest, G Gavalian, GP Gilfoyle, FX Girod, Derek I Glazier, AA Golubenko, RW Gothe, Y Gotra, KA Griffioen, M Guidal, K Hafidi, H Hakobyan, M Hattawy, F Hauenstein, K Hicks, A Hobart, M Holtrop, David G Ireland, EL Isupov, HS Jo, K Joo, S Joosten, D Keller, M Khachatryan, A Khanal, A Kim, W Kim, A Kripko, V Kubarovsky, SE Kuhn, L Lanza, M Leali, S Lee, P Lenisa, Kenneth Livingston, IJD MacGregor, D Marchand, N Markov, L Marsicano, V Mascagna, Bryan McKinnon, ZE Meziani, M Mirazita, V Mokeev, A Movsisyan, C Munoz Camacho, P Nadel-Turonski, Paul Naidoo, S Nanda, K Neupane, S Niccolai, G Niculescu, TR O’Connell, M Osipenko, M Paolone, LL Pappalardo, R Paremuzyan, E Pasyuk, W Phelps, O Pogorelko, Y Prok, BA Raue, M Ripani, J Ritman, A Rizzo, P Rossi, J Rowley, F Sabatié, C Salgado, A Schmidt, EP Segarra, YG Sharabian, U Shrestha, Daria Sokhan, O Soto, N Sparveris, S Stepanyan, II Strakovsky, S Strauch, Adam Thornton, N Tyler, Richard Tyson, M Ungaro, L Venturelli, H Voskanyan, E Voutier, DP Watts, K Wei, X Wei, MH Wood, B Yale, N Zachariou, J Zhang, (CLAS Collaboration)
发表日期
2021/4/16
期刊
Physical review letters
卷号
126
期号
15
页码范围
152501
出版商
American Physical Society
简介
The observation of beam spin asymmetries in two-pion production in semi-inclusive deep inelastic scattering off an unpolarized proton target is reported. The data presented here were taken in the fall of 2018 with the CLAS12 spectrometer using a 10.6 GeV longitudinally spin-polarized electron beam delivered by CEBAF at JLab. The measured asymmetries provide the first opportunity to extract the parton distribution function , which provides information about the interaction between gluons and quarks, in a collinear framework that offers cleaner access than previous measurements. The asymmetries also constitute the first ever signal sensitive to the helicity-dependent two-pion fragmentation function . A clear sign change is observed around the mass that appears in model calculations and is indicative of the dependence of the produced pions on the helicity of the fragmenting quark.
学术搜索中的文章
TB Hayward, C Dilks, A Vossen, H Avakian, S Adhikari… - Physical review letters, 2021