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Title: Search for new phenomena in events with high jet multiplicity and low missing transverse momentum in proton?proton collisions at s = 8 TeV

Abstract

A dedicated search is presented for new phenomena in inclusive 8- and 10-jet final states with low missing transverse momentum, with and without identification of jets originating from b quarks. The analysis is based on data from proton–proton collisions corresponding to an integrated luminosity of 19.7fb –1 collected with the CMS detector at the LHC at √s = 8TeV. The dominant multijet background expectations are obtained from low jet multiplicity control samples. Data agree well with the standard model background predictions, and limits are set in several benchmark models. Colorons (axigluons) with masses between 0.6 and 0.75 (up to 1.15) TeV are excluded at 95% confidence level. Similar exclusion limits for gluinos in R-parity violating supersymmetric scenarios are from 0.6 up to 1.1 TeV. Finally, these results comprise the first experimental probe of the coloron and axigluon models in multijet final states.

Authors:
 [1]
  1. Yerevan Physics Inst. (YerPhI), Yerevan (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)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
The CMS Collaboration
OSTI Identifier:
1353129
Alternate Identifier(s):
OSTI ID: 1294510
Report Number(s):
FERMILAB-PUB-16-305-CMS; CMS-EXO-13-001; CERN-EP-2016-187; arXiv:1608.01224
Journal ID: ISSN 0370-2693; 1479163
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Volume: 770; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CMS; physics; exotics; jets; coloron; axigluon; RPV; susy

Citation Formats

Khachatryan, Vardan. Search for new phenomena in events with high jet multiplicity and low missing transverse momentum in proton?proton collisions at s=8TeV. United States: N. p., 2017. Web. doi:10.1016/j.physletb.2017.01.073.
Khachatryan, Vardan. Search for new phenomena in events with high jet multiplicity and low missing transverse momentum in proton?proton collisions at s=8TeV. United States. doi:10.1016/j.physletb.2017.01.073.
Khachatryan, Vardan. Sat . "Search for new phenomena in events with high jet multiplicity and low missing transverse momentum in proton?proton collisions at s=8TeV". United States. doi:10.1016/j.physletb.2017.01.073.
@article{osti_1353129,
title = {Search for new phenomena in events with high jet multiplicity and low missing transverse momentum in proton?proton collisions at s=8TeV},
author = {Khachatryan, Vardan},
abstractNote = {A dedicated search is presented for new phenomena in inclusive 8- and 10-jet final states with low missing transverse momentum, with and without identification of jets originating from b quarks. The analysis is based on data from proton–proton collisions corresponding to an integrated luminosity of 19.7fb–1 collected with the CMS detector at the LHC at √s = 8TeV. The dominant multijet background expectations are obtained from low jet multiplicity control samples. Data agree well with the standard model background predictions, and limits are set in several benchmark models. Colorons (axigluons) with masses between 0.6 and 0.75 (up to 1.15) TeV are excluded at 95% confidence level. Similar exclusion limits for gluinos in R-parity violating supersymmetric scenarios are from 0.6 up to 1.1 TeV. Finally, these results comprise the first experimental probe of the coloron and axigluon models in multijet final states.},
doi = {10.1016/j.physletb.2017.01.073},
journal = {Physics Letters B},
number = C,
volume = 770,
place = {United States},
year = {2017},
month = {7}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.physletb.2017.01.073

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Cited by: 1 work
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Figures / Tables:

Fig. 1. Fig. 1.: Top: the dominant Feynman diagram representing the s-channel pair production of color-octet vector bosons, subsequently decaying into spin-0 particles and finally to gluons. The vector bosons can be colorons C or axigluons A, while the spin-0 particles can be pseudoscalar hyperpions π~ or scalar particles σ. This processmore » corresponds to models C and A1. Bottom: the second decay mode of an axigluon considered in this analysis (A2), involving a heavy quark Q and a pseudo-goldstone boson η with Higgs-like couplings.« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.