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@ARTICLE{Hayward:892501,
      author       = {Hayward, T. B. and Dilks, C. and Vossen, A. and Avakian, H.
                      and Adhikari, S. and Angelini, G. and Arratia, M. and Atac,
                      H. and Ayerbe Gayoso, C. and Baltzell, N. A. and Barion, L.
                      and Battaglieri, M. and Bedlinskiy, I. and Benmokhtar, F.
                      and Bianconi, A. and Biselli, A. S. and Bondì, M. and
                      Bossù, F. and Boiarinov, S. and Briscoe, W. J. and Brooks,
                      W. K. and Bulumulla, D. and Burkert, V. D. and Carman, D. S.
                      and Carvajal, J. C. and Celentano, A. and Chatagnon, P. and
                      Chetry, T. and Ciullo, G. and Clary, B. A. and Cole, P. L.
                      and Contalbrigo, M. and Costantini, G. and Crede, V. and
                      D’Angelo, A. and Dashyan, N. and De Vita, R. and Defurne,
                      M. and Deur, A. and Diehl, S. and Djalali, C. and Dupre, R.
                      and Dugger, M. and Egiyan, H. and Ehrhart, M. and El Alaoui,
                      A. and El Fassi, L. and Elouadrhiri, L. and Fegan, S. and
                      Filippi, A. and Forest, T. A. and Gavalian, G. and Gilfoyle,
                      G. P. and Girod, F. X. and Glazier, D. I. and Golubenko, A.
                      A. and Gothe, R. W. and Gotra, Y. and Griffioen, K. A. and
                      Guidal, M. and Hafidi, K. and Hakobyan, H. and Hattawy, M.
                      and Hauenstein, F. and Hicks, K. and Hobart, A. and Holtrop,
                      M. and Ireland, D. G. and Isupov, E. L. and Jo, H. S. and
                      Joo, K. and Joosten, S. and Keller, D. and Khachatryan, M.
                      and Khanal, A. and Kim, Taegeon and Kim, W. and Kripko, A.
                      and Kubarovsky, V. and Kühn, Sebastian Paul and Lanza, L.
                      and Leali, M. and Lee, S. and Lenisa, P. and Livingston, K.
                      and MacGregor, I. J. D. and Marchand, D. and Markov,
                      Aleksandr and Marsicano, L. and Mascagna, V. and McKinnon,
                      B. and Meziani, Z. E. and Mirazita, M. and Mokeev, V. and
                      Movsisyan, A. and Munoz Camacho, C. and Nadel-Turonski, P.
                      and Naidoo, P. and Nanda, S. and Neupane, K. and Niccolai,
                      S. and Niculescu, G. and O’Connell, T. R. and Osipenko, M.
                      and Paolone, M. and Pappalardo, L. L. and Paremuzyan, R. and
                      Pasyuk, E. and Phelps, W. and Pogorelko, O. and Prok, Y. and
                      Raue, B. A. and Ripani, M. and Ritman, J. and Rizzo, A. and
                      Rossi, P. and Rowley, J. and Sabatié, F. and Salgado, C.
                      and Schmidt, Anne and Segarra, E. P. and Sharabian, Y. G.
                      and Shrestha, U. and Sokhan, D. and Soto, O. and Sparveris,
                      N. and Stepanyan, S. and Strakovsky, I. I. and Strauch, S.
                      and Thornton, A. and Tyler, N. and Tyson, R. and Ungaro, M.
                      and Venturelli, L. and Voskanyan, H. and Voutier, E. and
                      Watts, D. P. and Wei, Daikang and Wei, X. and Wood, M. H.
                      and Yale, B. and Zachariou, N. and Zhang, Jiayuan},
      title        = {{O}bservation of {B}eam {S}pin {A}symmetries in the
                      {P}rocess e p → e ′ π + π − {X} with {CLAS}12},
      journal      = {Physical review letters},
      volume       = {126},
      number       = {15},
      issn         = {1079-7114},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2021-02110},
      pages        = {152501},
      year         = {2021},
      abstract     = {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 e(x), 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 G⊥1. A clear sign change
                      is observed around the ρ mass that appears in model
                      calculations and is indicative of the dependence of the
                      produced pions on the helicity of the fragmenting quark.},
      cin          = {IKP-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-1-20111104},
      pnm          = {6G12 - FAIR (GSI) (POF4-6G12) / 612 - Cosmic Matter in the
                      Laboratory (POF4-612)},
      pid          = {G:(DE-HGF)POF4-6G12 / G:(DE-HGF)POF4-612},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33929247},
      UT           = {WOS:000652828100006},
      doi          = {10.1103/PhysRevLett.126.152501},
      url          = {https://juser.fz-juelich.de/record/892501},
}