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Seong, I. S. [Author]; Vahsen, S. E. [Author]; Bakich, A. M. [Author]; Libby, J. [Author]; Liventsev, D. [Author]; Lubej, M. [Author]; Luo, T. [Author]; MacQueen, C. [Author]; Masuda, M. [Author]; Matsuda, T. [Author]; Merola, M. [Author]; Miyabayashi, K. [Author]; Miyata, H. [Author]; Bansal, V. [Author]; Mizuk, R. [Author]; Mohanty, G. B. [Author]; Mori, T. [Author]; Mussa, R. [Author]; Nakano, E. [Author]; Nakao, M. [Author]; Nanut, T. [Author]; Nath, K. J. [Author]; Nayak, M. [Author]; Niiyama, M. [Author]; [...]

Search for a Light C P -odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment

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  • Media type: E-Article
  • Title: Search for a Light C P -odd Higgs Boson and Low-Mass Dark Matter at the Belle Experiment
  • Contributor: Seong, I. S. [Author]; Vahsen, S. E. [Author]; Bakich, A. M. [Author]; Libby, J. [Author]; Liventsev, D. [Author]; Lubej, M. [Author]; Luo, T. [Author]; MacQueen, C. [Author]; Masuda, M. [Author]; Matsuda, T. [Author]; Merola, M. [Author]; Miyabayashi, K. [Author]; Miyata, H. [Author]; Bansal, V. [Author]; Mizuk, R. [Author]; Mohanty, G. B. [Author]; Mori, T. [Author]; Mussa, R. [Author]; Nakano, E. [Author]; Nakao, M. [Author]; Nanut, T. [Author]; Nath, K. J. [Author]; Nayak, M. [Author]; Niiyama, M. [Author]; [...]
  • Published: APS, 2019
  • Published in: Physical review letters 122(1), 011801 (2019). doi:10.1103/PhysRevLett.122.011801
  • Language: English
  • DOI: https://doi.org/10.1103/PhysRevLett.122.011801
  • ISSN: 0031-9007; 1079-7114; 1092-0145
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: We report on the first Belle search for a light CP-odd Higgs boson, A0, that decays into low mass dark matter, χ, in final states with a single photon and missing energy. We search for events produced via the dipion transition Υ(2S)→Υ(1S)π+π−, followed by the on-shell process Υ(1S)→γA0 with A0→χχ, or by the off-shell process Υ(1S)→γχχ. Utilizing a data sample of 157.3×106 Υ(2S) decays, we find no evidence for a signal. We set limits on the branching fractions of such processes in the mass ranges MA0<8.97 GeV/c2 and Mχ<4.44 GeV/c2. We then use the limits on the off-shell process to set competitive limits on WIMP-nucleon scattering in the WIMP mass range below 5 GeV/c2.
  • Access State: Open Access