Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two b quarks and two τ leptons in proton–proton collisions at s=13TeV

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • The CMS collaboration

Organisaatiot

  • University of Kansas
  • Beihang University
  • Université Libre de Bruxelles
  • CAS - Institute of High Energy Physics
  • CERN
  • Texas Tech University
  • State Key Laboratory of Nuclear Physics and Technology
  • Peking University
  • University of Virginia
  • Egyptian Network of High Energy Physics
  • Academy of Scientific Research and Technology of the Arab Republic of Egypt
  • Zewail City of Science and Technology
  • National Institute of Chemical Physics and Biophysics, Tallinn
  • University of Helsinki
  • Helsinki Institute of Physics
  • Universite Paris-Saclay
  • Universite Claude Bernard Lyon 1
  • German Electron Synchrotron
  • Karlsruhe Institute of Technology
  • University of Athens
  • Eotvos Lorand University
  • Panjab University
  • Indian Institute of Science Education and Research Pune
  • University of Delhi
  • Northwestern University
  • Saha Institute of Nuclear Physics
  • Bhabha Atomic Research Centre
  • Universit'a di Rome Sapienza
  • Scuola Normale Superiore di Pisa
  • Kansas State University
  • Kyungpook National University
  • Brown University
  • Hanyang University
  • Korea University
  • University of Seoul
  • National Centre for Particle Physics
  • University of Malaya
  • National Centre for Physics
  • Quaid-I-Azam University
  • Institute for Particle Physics and Astrophysics (IPA)
  • Swiss Federal Institute of Technology Zurich
  • National Central University
  • National Taiwan University
  • Bogazici University
  • Marmara University
  • Istanbul Technical University
  • Hacettepe University
  • University of Bristol
  • Imperial College London
  • Brunel University
  • University of California at Riverside
  • Florida State University
  • UC-San-Diego
  • University of Florida
  • California Institute of Technology
  • University of Colorado Boulder
  • Fermi National Accelerator Laboratory
  • Massachusetts Institute of Technology
  • University of Illinois at Chicago
  • Ohio State University
  • Purdue University
  • Rice University
  • The State University of New Jersey
  • Texas A and M University
  • University of Wisconsin-Madison

Kuvaus

A search for an exotic decay of the Higgs boson to a pair of light pseudoscalar bosons is performed for the first time in the final state with two b quarks and two τ leptons. The search is motivated in the context of models of physics beyond the standard model (SM), such as two Higgs doublet models extended with a complex scalar singlet (2HDM + S), which include the next-to-minimal supersymmetric SM (NMSSM). The results are based on a data set of proton–proton collisions corresponding to an integrated luminosity of 35.9fb−1, accumulated by the CMS experiment at the LHC in 2016 at a center-of-mass energy of 13TeV. Masses of the pseudoscalar boson between 15 and 60GeV are probed, and no excess of events above the SM expectation is observed. Upper limits between 3 and 12% are set on the branching fraction B(h→aa→2τ2b) assuming the SM production of the Higgs boson. Upper limits are also set on the branching fraction of the Higgs boson to two light pseudoscalar bosons in different 2HDM + S scenarios. Assuming the SM production cross section for the Higgs boson, the upper limit on this quantity is as low as 20% for a mass of the pseudoscalar of 40GeV in the NMSSM.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut462-488
Sivumäärä27
JulkaisuPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Vuosikerta785
TilaJulkaistu - 10 lokakuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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