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Search for Physics beyond the Standard Model in Events with Overlapping Photons and Jets

Title
Search for Physics beyond the Standard Model in Events with Overlapping Photons and Jets
Author
김태정
Keywords
PP COLLISIONS; SUPERSYMMETRY; ALGORITHMS
Issue Date
2019-12
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v. 123, no. 24, article no. 241801
Abstract
Results are reported from a search for new particles that decay into a photon and two gluons, in events with jets. Novel jet substructure techniques are developed that allow photons to be identified in an environment densely populated with hadrons. The analyzed proton-proton collision data were collected by the CMS experiment at the LHC, in 2016 at root s = 13 TeV, and correspond to an integrated luminosity of 35.9 fb(-1). The spectra of total transverse hadronic energy of candidate events are examined for deviations from the standard model predictions. No statistically significant excess is observed over the expected background. The first cross section limits on new physics processes resulting in such events are set. The results are interpreted as upper limits on the rate of gluino pair production, utilizing a simplified stealth supersymmetry model. The excluded gluino masses extend up to 1.7 TeV, for a neutralino mass of 200 GeV and exceed previous mass constraints set by analyses targeting events with isolated photons.
URI
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.241801https://repository.hanyang.ac.kr/handle/20.500.11754/157925
ISSN
0031-9007; 1079-7114
DOI
10.1103/PhysRevLett.123.241801
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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