Please use this identifier to cite or link to this item:
http://bura.brunel.ac.uk/handle/2438/12001
Title: | Search for exotic decays of a Higgs boson into undetectable particles and one or more photons |
Authors: | CMS Collaboration Cole, JE Hobson, PR Khan, A Kyberd, P Leggat, D Leslie, D Reid, ID Symonds, P Teodorescu, L Turner, M |
Keywords: | CMS;Physics;Higgs |
Issue Date: | 2016 |
Publisher: | Elsevier |
Citation: | Physics Letters B, 753 pp. 363 - 388, (2016) |
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 8TeV. The data correspond to an inte-grated luminosity of up to 19.4fb−1collected 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 125GeV Higgs boson decaying into undetectable particles and one or two iso-lated photons as a function of the neutralino mass. For this class of models and neutralino masses from 1 to 120GeV 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. |
URI: | http://www.sciencedirect.com/science/article/pii/S037026931500965X http://bura.brunel.ac.uk/handle/2438/12001 |
DOI: | http://dx.doi.org/10.1016/j.physletb.2015.12.017 |
ISSN: | C C 0370-2693 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Fulltext.pdf | 1.06 MB | Adobe PDF | View/Open |
Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.