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Search for Higgs and Z boson decays to J/Psi or Y pairs in the four-muon final stste in proton-proton collisions at 13 TeV

Title
Search for Higgs and Z boson decays to J/Psi or Y pairs in the four-muon final stste in proton-proton collisions at 13 TeV
Author
김태정
Keywords
CMS; Standard model physics; Higgs boson; Z boson; Rare decays
Issue Date
2019-10
Publisher
ELSEVIER SCIENCE BV
Citation
PHYSICS LETTERS B, v. 797, article no. 134811
Abstract
A search for decays of the Higgs and Z boson to pairs of or (n = 1, 2, 3) mesons, with their subsequent decay to pairs, is presented. The analysis uses data from proton-proton collisions at , collected with the CMS detector at the LHC in 2017 and corresponding to an integrated luminosity of 37.5. While an observation of such a decay with this sample would indicate the presence of physics beyond the standard model, no significant excess is observed. Upper limits at 95% confidence level are placed on the branching fractions of these decays. In the pair channel, the limits are and for the Higgs and Z boson, respectively, while in the combined pair channel, the limits are and , respectively, when the mesons from the Higgs and Z boson decay are assumed to be unpolarized. When fully longitudinal and transverse polarizations are considered the limits reduce by about 22–29% and increase by about 10–13%, respectively.
URI
https://www.sciencedirect.com/science/article/pii/S0370269319305210?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/154567
ISSN
0370-2693
DOI
10.1016/j.physletb.2019.134811
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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