First observation of correlations between spin and transverse momenta in back-to-back dihadron production at CLAS12
Creators: name: Avakian, H.
name: Hayward, T. B.
name: Kotzinian, A.
name: Armstrong, W. R.
name: Atac, H.
name: Gayoso, C. Ayerbe
name: Baashen, L.
name: Baltzell, N. A.
name: Barion, L.
name: Bashkanov, M.
name: Battaglieri, M.
name: Bedlinskiy, I.
name: Benmokhtar, F.
name: Bianconi, A.
name: Biondo, L.
name: Biselli, A. S.
name: Bondi, M.
name: Boiarinov, S.
name: Bossù, F.
name: Brinkman, K. T.
name: Briscoe, W. J.
name: Brooks, W. K.
name: Bueltmann, S.
name: Bulumulla, D.
name: Burkert, V. D.
name: Capobianco, R.
name: Carman, D. S.
name: Carvajal, J. C.
name: Celentano, A.
name: Chatagnon, P.
name: Chesnokov, V.
name: Chetry, T.
name: Ciullo, G.
name: Cole, P. L.
name: Contalbrigo, M.
name: Costantini, G.
name: D'Angelo, A.
name: Dashyan, N.
name: De Vita, R.
name: Defurne, M.
name: Deur, A.
name: Diehl, S.
name: Dilks, C.
name: Djalali, C.
name: Dupre, R.
name: Egiyan, H.
name: Alaoui, A. El
name: Fassi, L. El
name: Elouadrhiri, L.
name: Fegan, S.
name: Filippi, A.
name: Forest, T.
name: Gates, K.
name: Gavalian, G.
name: Gilyan, Y.
name: Glazier, D. I.
name: Golubenko, A. A.
name: Gosta, G.
name: Gothe, R. W.
name: Gotra, Y.
name: Griffioen, K. A.
name: Guidal, M.
name: Hakobyan, H.
name: Hattawy, M.
name: Hauenstein, F.
name: Heddle, D.
name: Hobart, A.
name: Holtrop, M.
name: Hyde, C. E.
name: Ilieva, Y.
name: Ire, D. G.
name: Isupov, E. L.
name: Jo, H. S.
name: Johnston, R.
name: Joo, K.
name: Kabir, M. L.
name: Keller, D.
name: Khachatryan, M.
name: Khanal, A.
name: Kim, A.
name: Kim, W.
name: Klimenko, V.
name: Kripko, A.
name: Kubarovsky, V.
name: Kuhn, S. E.
name: Lagerquist, V.
name: Lanza, L.
name: Leali, M.
name: Lee, S.
name: Lenisa, P.
name: Li, X.
name: MacGregor, I . J . D.
name: Marc, D.
name: Mascagna, V.
name: McKinnon, B.
name: Migliorati, S.
name: Mineeva, T.
name: Mirazita, M.
name: Mokeev, V.
name: Montgomery, R. A.
name: Camacho, C. Munoz
name: Nadel-Turonski, P.
name: Naidoo, P.
name: Neupane, K.
name: Nguyen, D.
name: Niccolai, S.
name: Nicol, M.
name: Niculescu, G.
name: Osipenko, M.
name: Pandey, P.
name: Paolone, M.
name: Pappalardo, L. L.
name: Paremuzyan, R.
name: Pasyuk, E.
name: Paul, S. J.
name: Phelps, W.
name: Pilleux, N.
name: Pogorelko, O.
name: Pokhrel, M.
name: Poudel, J.
name: Price, J. W.
name: Prok, Y.
name: Raue, B. A.
name: Reed, T.
name: Richards, J.
name: Ripani, M.
name: Ritman, J.
name: Rossi, P.
name: Sabatié, F.
name: Salgado, C.
name: Schmidt, A.
name: Sharabian, Y. G.
name: Shirokov, E. V.
name: Shrestha, U.
name: Simmerling, P.
name: Sokhan, D.
name: Sparveris, N.
name: Stepanyan, S.
name: Strakovsky, I. I.
name: Strauch, S.
name: Tan, J. A.
name: Trotta, N.
name: Tyson, R.
name: Ungaro, M.
name: Vallarino, S.
name: Venturelli, L.
name: Voskanyan, H.
name: Vossen, A.
name: Voutier, E.
name: Watts, D. P.
name: Wei, X.
name: Wishart, R.
name: Wood, M. H.
name: Zachariou, N.
name: Zhao, Z. W.
name: Zurek, M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report the first measurements of deep inelastic scattering spin-dependent azimuthal asymmetries in back-to-back dihadron electroproduction, where two hadrons are produced in opposite hemispheres along the z-axis in the center-of-mass frame, with the first hadron produced in the current-fragmentation region and the second in the target-fragmentation region. The data were taken with longitudinally polarized electron beams of 10.2 and 10.6 GeV incident on an unpolarized liquid-hydrogen target using the CLAS12 spectrometer at Jefferson Lab. Observed non-zero $\sinΔϕ$ modulations in $ep \rightarrow e'pπ^+X$ events, where $Δϕ$ is the difference of the azimuthal angles of the proton and pion in the virtual photon and target nucleon center-of-mass frame, indicate that correlations between the spin and transverse momenta of hadrons produced in the target- and current-fragmentation regions may be significant. The measured beam-spin asymmetries provide a first access in dihadron production to a previously unobserved leading-twist spin- and transverse-momentum-dependent fracture function. The fracture functions describe the hadronization of the target remnant after the hard scattering of a virtual photon off a quark in the target particle and provide a new avenue for studying nucleonic structure and hadronization.
description: 7 pages, 6 figures