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High Energy Physics - Experiment

arXiv:1507.00359 (hep-ex)
[Submitted on 1 Jul 2015 (v1), last revised 29 Dec 2015 (this version, v2)]

Title:Search for exotic decays of a Higgs boson into undetectable particles and one or more photons

Authors:CMS Collaboration
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Abstract:A search is presented for exotic decays of a Higgs boson into undetectable particles and one or two isolated photons in pp collisions at a center-of-mass energy of 8 TeV. The data correspond to an integrated luminosity of up to 19.4 inverse femtobarns collected with the CMS detector at the LHC. Higgs bosons produced in gluon-gluon fusion and in association with a Z boson are investigated, using models in which the Higgs boson decays into a gravitino and a neutralino or a pair of neutralinos, followed by the decay of the neutralino to a gravitino and a photon. The selected events are consistent with the background-only hypothesis, and limits are placed on the product of cross sections and branching fractions. Assuming a standard model Higgs boson production cross section, a 95% confidence level upper limit is set on the branching fraction of a 125 GeV Higgs boson decaying into undetectable particles and one or two isolated photons as a function of the neutralino mass. For this class of models and neutralino masses from 1 to 120 GeV an upper limit in the range of 7 to 13% is obtained. Further results are given as a function of the neutralino lifetime, and also for a range of Higgs boson masses.
Comments: Replaced with published version. Added journal reference
Subjects: High Energy Physics - Experiment (hep-ex)
Report number: CMS-HIG-14-025, CERN-PH-EP-2015-131
Cite as: arXiv:1507.00359 [hep-ex]
  (or arXiv:1507.00359v2 [hep-ex] for this version)
  https://doi.org/10.48550/arXiv.1507.00359
Journal reference: Phys. Lett. B 753 (2016) 363
Related DOI: https://doi.org/10.1016/j.physletb.2015.12.017

Submission history

From: The CMS Collaboration [view email]
[v1] Wed, 1 Jul 2015 20:11:26 UTC (382 KB)
[v2] Tue, 29 Dec 2015 16:53:39 UTC (374 KB)
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