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@ARTICLE{Andreev:616765,
      author       = {Andreev, V. and Arratia, M. and Baghdasaryan, A. and Baty,
                      A. and Begzsuren, K. and Bolz, A. and Boudry, V. and Brandt,
                      G. and Britzger, D. and Buniatyan, A. and Bystritskaya, L.
                      and Campbell, A. J. and Cantun Avila, K. B. and Cerny, K.
                      and Chekelian, V. and Chen, Z. and Contreras, J. G. and
                      Cvach, J. and Dainton, J. B. and Daum, K. and Deshpande, A.
                      and Diaconu, C. and Drees, A. and Eckerlin, G. and Egli, S.
                      and Elsen, E. and Favart, L. and Fedotov, A. and Feltesse,
                      J. and Fleischer, M. and Fomenko, A. and Gal, C. and Gayler,
                      J. and Goerlich, L. and Gogitidze, N. and Gouzevitch, M. and
                      Grab, C. and Greenshaw, T. and Grindhammer, G. and Haidt, D.
                      and Henderson, R. C. W. and Hessler, J. and Hladký, J. and
                      Hoffmann, D. and Horisberger, R. and Hreus, T. and Huber, F.
                      and Jacobs, P. M. and Jacquet, M. and Janssen, T. and Jung,
                      A. W. and Katzy, J. and Kiesling, C. and Klein, M. and
                      Kleinwort, C. and Klest, H. T. and Kluth, S. and Kogler, R.
                      and Kostka, P. and Kretzschmar, J. and Krücker, D. and
                      Krüger, K. and Landon, M. P. J. and Lange, W. and Laycock,
                      P. and Lee, S. H. and Levonian, S. and Li, W. and Lin, J.
                      and Lipka, K. and List, B. and List, J. and Lobodzinski, B.
                      and Long, O. R. and Malinovski, E. and Martyn, H.-U. and
                      Maxfield, S. J. and Mehta, A. and Meyer, A. B. and Meyer, J.
                      and Mikocki, S. and Mikuni, V. M. and Mondal, M. M. and
                      Müller, K. and Nachman, B. and Naumann, Th. and Newman, P.
                      R. and Niebuhr, C. and Nowak, G. and Olsson, J. E. and
                      Ozerov, D. and Park, S. and Pascaud, C. and Patel, G. D. and
                      Perez, E. and Petrukhin, A. and Picuric, I. and Pitzl, D.
                      and Polifka, R. and Preins, S. and Radescu, V. and Raicevic,
                      N. and Ravdandorj, T. and Reichelt, D. and Reimer, P. and
                      Rizvi, E. and Robmann, P. and Roosen, R. and Rostovtsev, A.
                      and Rotaru, M. and Sankey, D. P. C. and Sauter, M. and
                      Sauvan, E. and Schmitt, S. and Schmookler, B. A. and
                      Schnell, G. and Schoeffel, L. and Schöning, A. and
                      Schumann, S. and Sefkow, F. and Shushkevich, S. and
                      Soloviev, Y. and Sopicki, P. and South, D. and Specka, A.
                      and Steder, M. and Stella, B. and Stöcker, L. and
                      Straumann, U. and Sun, C. and Sykora, T. and Thompson, P. D.
                      and Acosta, F. Torales and Traynor, D. and Tseepeldorj, B.
                      and Tu, Z. and Tustin, G. and Valkárová, A. and Vallée,
                      C. and Van Mechelen, P. and Wegener, D. and Wünsch, E. and
                      Žáček, J. and Zhang, J. and Zhang, Z. and Žlebčík, R.
                      and Zohrabyan, H. and Zomer, F.},
      collaboration = {{H1 Collaboration}},
      title        = {{O}bservation and differential cross section measurement of
                      neutral current {DIS} events with an empty hemisphere in the
                      {B}reit frame},
      reportid     = {PUBDB-2024-06519, arXiv:2403.08982. DESY-24-034},
      year         = {2024},
      note         = {13 pages, 5 figures, 2 Tables. This version as accepted for
                      publication},
      abstract     = {The Breit frame provides a natural frame to analyze
                      lepton–proton scattering events. In this reference frame,
                      the parton model hard interactions between a quark and an
                      exchanged boson defines the coordinate system such that the
                      struck quark is back-scattered along the virtual photon
                      momentum direction. In Quantum Chromodynamics (QCD), higher
                      order perturbative or non-perturbative effects can change
                      this picture drastically. As Bjorken-x decreases below one
                      half, a rather peculiar event signature is predicted with
                      increasing probability, where no radiation is present in one
                      of the two Breit-frame hemispheres and all emissions are to
                      be found in the other hemisphere. At higher orders in
                      $\alpha _{s}$ or in the presence of soft QCD effects,
                      predictions of the rate of these events are far from
                      trivial, and that motivates measurements with real data. We
                      report on the first observation of the empty current
                      hemisphere events in electron–proton collisions at the
                      HERA collider using data recorded with the H1 detector at a
                      center-of-mass energy of 319 GeV. The fraction of inclusive
                      neutral-current DIS events with an empty hemisphere is found
                      to be $0.0112 \pm 3.9\\%_\text {stat} \pm 4.5\\%_{\text
                      {syst}} \pm 1.6\\%_{\text {mod}}$ in the selected kinematic
                      region of $150<Q^{2} <1500\, \textrm{GeV}^2 $ and
                      inelasticity $0.14<y<0.7$. The data sample corresponds to an
                      integrated luminosity of 351.1 pb${}^{-1}$, sufficient to
                      enable differential cross section measurements of these
                      events. The results show an enhanced discriminating power at
                      lower Bjorken-x among different Monte Carlo event generator
                      predictions.},
      keywords     = {experimental results (INSPIRE) / H1 (INSPIRE) / deep
                      inelastic scattering: neutral current (INSPIRE) / quantum
                      chromodynamics: effect (INSPIRE) / photon: virtual (INSPIRE)
                      / model: parton (INSPIRE) / effect: nonperturbative
                      (INSPIRE) / Breit frame (INSPIRE) / Monte Carlo (INSPIRE) /
                      quark (INSPIRE) / higher-order (INSPIRE) / differential
                      cross section: measured (INSPIRE) / electron p: deep
                      inelastic scattering (INSPIRE) / kinematics (INSPIRE) /
                      backscatter (INSPIRE) / DESY HERA Stor (INSPIRE)},
      cin          = {H1},
      ddc          = {530},
      cid          = {I:(DE-H253)H1-20120806},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-588)4443767-5},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2403.08982},
      howpublished = {arXiv:2403.08982},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2403.08982;\%\%$},
      doi          = {10.3204/PUBDB-2024-06519},
      url          = {https://bib-pubdb1.desy.de/record/616765},
}