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@ARTICLE{Adhikari:892485,
      author       = {Adhikari, S. and Akondi, C. S. and Ali, Hassan and Amaryan,
                      M. and Asaturyan, A. and Austregesilo, A. and Baldwin, Z.
                      and Barbosa, F. and Barlow, J. and Barriga, E. and Barsotti,
                      R. and Beattie, T. D. and Berdnikov, V. V. and Black, T. and
                      Boeglin, W. and Briscoe, W. J. and Britton, T. and Brooks,
                      W. K. and Cannon, B. E. and Chudakov, E. and Cole, S. and
                      Cortes, O. and Crede, V. and Dalton, M. M. and Daniels, T.
                      and Deur, A. and Dobbs, S. and Dolgolenko, A. and Dotel, R.
                      and Dugger, M. and Dzhygadlo, R. and Egiyan, H. and Erbora,
                      T. and Ernst, A. and Eugenio, P. and Fanelli, C. and Fegan,
                      S. and Fitches, J. and Foda, A. M. and Furletov, S. and Gan,
                      L. and Gao, Yichen and Gasparian, A. and Gleason, C. and
                      Goetzen, K. and Goryachev, V. S. and Guo, L. and Hakobyan,
                      H. and Hamdi, A. and Huber, G. M. and Hurley, A. and
                      Ireland, D. G. and Ito, M. M. and Jaegle, I. and Jarvis, N.
                      S. and Jones, R. T. and Kakoyan, V. and Kalicy, G. and
                      Kamel, M. and Khachatryan, V. and Khatchatryan, M. and
                      Kourkoumelis, C. and Kuleshov, S. and LaDuke, A. and Larin,
                      I. and Lawrence, D. and Lersch, D. I. and Li, Huimin and Li,
                      Wanxin and Liu, Bochao and Livingston, K. and Lolos, G. J.
                      and Luckas, K. and Lyubovitskij, V. and Mack, D. and
                      Marukyan, H. and Matveev, V. and McCaughan, M. and
                      McCracken, M. and McGinley, W. and Meyer, Carolin and
                      Miskimen, R. and Mitchell, R. E. and Mizutani, K. and
                      Neelamana, V. and Nerling, F. and Ng, L. and Ostrovidov, A.
                      I. and Papandreou, Z. and Paudel, C. and Pauli, P. and
                      Pedroni, R. and Pentchev, L. and Peters, K. J. and Phelps,
                      W. and Pooser, E. and Reinhold, J. and Ritchie, B. G. and
                      Ritman, J. and Rodriguez, G. and Romanov, D. and Romero, C.
                      and Salgado, C. and Schadmand, S. and Schertz, A. M. and
                      Schick, A. and Tichelbäcker, Laura and Schwiening, J. and
                      Shen, X. and Shepherd, M. R. and Smith, A. and Smith, E. S.
                      and Sober, D. I. and Somov, A. and Somov, S. and Soto, O.
                      and Stevens, J. R. and Strakovsky, I. I. and Sumner, B. and
                      Suresh, K. and Tarasov, V. V. and Taylor, S. and
                      Teymurazyan, A. and Thiel, A. and Vasileiadis, G. and
                      Whitlatch, T. and Wickramaarachchi, N. and Williams, M. and
                      Yang, Yuqian and Zarling, J. and Zhang, Zhe and Zhao, Z. and
                      Zhou, J. and Zhou, Q. and Zhou, Xiaoran and Zihlmann, B.},
      title        = {{M}easurement of beam asymmetry for π − Δ + +
                      photoproduction on the proton at {E} γ = 8.5 {G}e{V}},
      journal      = {Physical review / C},
      volume       = {103},
      number       = {2},
      issn         = {2469-9985},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2021-02105},
      pages        = {L022201},
      year         = {2021},
      abstract     = {We report a measurement of the $\pi^-$ photoproduction beam
                      asymmetry for the reaction $\vec{\gamma} p \rightarrow \pi^-
                      \Delta^{++}$ using data from the GlueX experiment in the
                      photon beam energy range 8.2--8.8 GeV. The asymmetry
                      $\Sigma$ is measured as a function of four-momentum transfer
                      $t$ to the $\Delta^{++}$ and compared to phenomenological
                      models. We find that $\Sigma$ varies as a function of $t$:
                      negative at smaller values and positive at higher values of
                      $|t|$. The reaction can be described theoretically by
                      $t$-channel particle exchange requiring pseudoscalar,
                      vector, and tensor intermediaries. In particular, this
                      reaction requires charge exchange, allowing us to probe pion
                      exchange and the significance of higher-order corrections to
                      one-pion exchange at low momentum transfer. Constraining
                      production mechanisms of conventional mesons may aid in the
                      search for and study of unconventional mesons. This is the
                      first measurement of the process at this energy.},
      cin          = {IKP-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IKP-1-20111104},
      pnm          = {612 - Cosmic Matter in the Laboratory (POF4-612) / 6G12 -
                      FAIR (GSI) (POF4-6G12)},
      pid          = {G:(DE-HGF)POF4-612 / G:(DE-HGF)POF4-6G12},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2009.07326},
      howpublished = {arXiv:2009.07326},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2009.07326;\%\%$},
      UT           = {WOS:000620346400007},
      doi          = {10.1103/PhysRevC.103.L022201},
      url          = {https://juser.fz-juelich.de/record/892485},
}