Search for neutral color-octet weak-triplet scalar particles in proton-proton collisions at root s=8TeVopen access
- Authors
- Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Asilar, E; Bergauer, T; Brandstetter, J; Brondolin, E; Dragicevic, M; Kim, Tae Jeong
- Issue Date
- Sep-2015
- Publisher
- SPRINGER
- Keywords
- Exotics; Hadron-Hadron Scattering
- Citation
- JOURNAL OF HIGH ENERGY PHYSICS, v.2015, no.9, pp.1 - 37
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF HIGH ENERGY PHYSICS
- Volume
- 2015
- Number
- 9
- Start Page
- 1
- End Page
- 37
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/142918
- DOI
- 10.1007/JHEP09(2015)201
- ISSN
- 1126-6708
- Abstract
- A search for pair production of neutral color-octet weak-triplet scalar particles (Theta(0)) is performed in processes where one Theta(0) decays to a pair of b quark jets and the other to a Z boson plus a jet, with the Z boson decaying to a pair of electrons or muons. The search is performed with data collected by the CMS experiment at the CERN LHC corresponding to an integrated luminosity of 19.7 fb(-1) of proton-proton collisions at root s = 8TeV. The number of observed events is found to be in agreement with the standard model predictions. The 95% confidence level upper limit on the product of the cross section and branching fraction is obtained as a function of the Theta(0) mass. The 95% confidence level lower bounds on the Theta(0) mass are found to be 623 and 426 GeV, for two different octo-triplet theoretical scenarios. These are the first direct experimental bounds on particles predicted by the octo-triplet model.
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