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

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,more » and also for a range of Higgs boson masses.« less
Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.
Publication Date:
Report Number(s):
CERN-PH-EP-2015-131; CMS-HIG-14-025
Journal ID: ISSN 0370-2693; arXiv eprint number arXiv:1507.00359; TRN: US1601092
Grant/Contract Number:
AC02-07CH11359
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 753; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
CMS Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CMS; physics; Higgs
OSTI Identifier:
1230069
Alternate Identifier(s):
OSTI ID: 1236361

Khachatryan, V. Search for exotic decays of a Higgs boson into undetectable particles and one or more photons. United States: N. p., Web. doi:10.1016/j.physletb.2015.12.017.
Khachatryan, V. Search for exotic decays of a Higgs boson into undetectable particles and one or more photons. United States. doi:10.1016/j.physletb.2015.12.017.
Khachatryan, V. 2015. "Search for exotic decays of a Higgs boson into undetectable particles and one or more photons". United States. doi:10.1016/j.physletb.2015.12.017.
@article{osti_1230069,
title = {Search for exotic decays of a Higgs boson into undetectable particles and one or more photons},
author = {Khachatryan, V.},
abstractNote = {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.},
doi = {10.1016/j.physletb.2015.12.017},
journal = {Physics Letters. Section B},
number = ,
volume = 753,
place = {United States},
year = {2015},
month = {12}
}