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Title: Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

Abstract

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at $$\sqrt{s}$$ = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb -1. The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t-tbar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95% confidence level for the product of the production cross section and branching fraction $$\sigma$$(gg → X) B(X → HH → $$b\bar{b}b\bar{b}$$) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with a mass scale $$\Lambda_R$$ = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV.

Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI) (Armenia). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1244504
Alternate Identifier(s):
OSTI ID: 1411636
Report Number(s):
FERMILAB-PUB-16-053-CMS; CMS-EXO-12-053; CERN-EP-2016-041; arXiv:1602.08762
Journal ID: ISSN 1434-6044; 1424833
Grant/Contract Number:  
AC02-07CH11359; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 76; Journal Issue: 7; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Khachatryan, Vardan. Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks. United States: N. p., 2016. Web. doi:10.1140/epjc/s10052-016-4206-6.
Khachatryan, Vardan. Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks. United States. doi:10.1140/epjc/s10052-016-4206-6.
Khachatryan, Vardan. Mon . "Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks". United States. doi:10.1140/epjc/s10052-016-4206-6. https://www.osti.gov/servlets/purl/1244504.
@article{osti_1244504,
title = {Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks},
author = {Khachatryan, Vardan},
abstractNote = {A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at $\sqrt{s}$ = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb-1. The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t-tbar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95% confidence level for the product of the production cross section and branching fraction $\sigma$(gg → X) B(X → HH → $b\bar{b}b\bar{b}$) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with a mass scale $\Lambda_R$ = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV.},
doi = {10.1140/epjc/s10052-016-4206-6},
journal = {European Physical Journal. C, Particles and Fields},
number = 7,
volume = 76,
place = {United States},
year = {2016},
month = {7}
}

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