TY - JOUR
T1 - Search for exotic decays of a Higgs boson into undetectable particles and one or more photons
AU - CMS Collaboration
AU - Khachatryan, V.
AU - Sirunyan, A. M.
AU - Tumasyan, A.
AU - Adam, W.
AU - Asilar, E.
AU - Bergauer, T.
AU - Brandstetter, J.
AU - Brondolin, E.
AU - Dragicevic, M.
AU - Erö, J.
AU - Flechl, M.
AU - Friedl, M.
AU - Frühwirth, R.
AU - Ghete, V. M.
AU - Hartl, C.
AU - Hörmann, N.
AU - Hrubec, J.
AU - Jeitler, M.
AU - Knünz, V.
AU - König, A.
AU - Krammer, M.
AU - Krätschmer, I.
AU - Liko, D.
AU - Matsushita, T.
AU - Mikulec, I.
AU - Rabady, D.
AU - Rahbaran, B.
AU - Rohringer, H.
AU - Schieck, J.
AU - Schöfbeck, R.
AU - Strauss, J.
AU - Treberer-Treberspurg, W.
AU - Waltenberger, W.
AU - Wulz, C. E.
AU - Mossolov, V.
AU - Shumeiko, N.
AU - Suarez Gonzalez, J.
AU - Alderweireldt, S.
AU - Cornelis, T.
AU - De Wolf, E. A.
AU - Janssen, X.
AU - Knutsson, A.
AU - Lauwers, J.
AU - Luyckx, S.
AU - Ochesanu, S.
AU - Rougny, R.
AU - Van De Klundert, M.
AU - Van Haevermaet, H.
AU - Van Mechelen, P.
AU - Daci, N.
N1 - Publisher Copyright:
© 2015 CERN for the benefit of the CMS Collaboration
PY - 2016/2/10
Y1 - 2016/2/10
N2 - 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 fb−1 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.
AB - 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 fb−1 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.
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U2 - 10.1016/j.physletb.2015.12.017
DO - 10.1016/j.physletb.2015.12.017
M3 - Article
AN - SCOPUS:85040815540
SN - 0370-2693
VL - 753
SP - 363
EP - 388
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -