Search for dark matter particles in proton-proton collisions at √s=8 TeV using the razor variables

The CMS collaboration

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A search for dark matter particles directly produced in proton-proton collisions recorded by the CMS experiment at the LHC is presented. The data correspond to an integrated luminosity of 18.8 fb−1, at a center-of-mass energy of 8 TeV. The event selection requires at least two jets and no isolated leptons. The razor variables are used to quantify the transverse momentum balance in the jet momenta. The study is performed separately for events with and without jets originating from b quarks. The observed yields are consistent with the expected backgrounds and, depending on the nature of the production mechanism, dark matter production at the LHC is excluded at 90% confidence level for a mediator mass scale Λ below 1 TeV. The use of razor variables yields results that complement those previously published.[Figure not available: see fulltext.]

Original languageEnglish
Article number88
JournalJournal of High Energy Physics
Volume2016
Issue number12
DOIs
Publication statusPublished - 1 Dec 2016

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dark matter
collisions
protons
transverse momentum
complement
center of mass
leptons
confidence
luminosity
quarks
momentum
energy

Keywords

  • Hadron-Hadron scattering (experiments)
  • Supersymmetry

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Search for dark matter particles in proton-proton collisions at √s=8 TeV using the razor variables. / The CMS collaboration.

In: Journal of High Energy Physics, Vol. 2016, No. 12, 88, 01.12.2016.

Research output: Contribution to journalArticle

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abstract = "A search for dark matter particles directly produced in proton-proton collisions recorded by the CMS experiment at the LHC is presented. The data correspond to an integrated luminosity of 18.8 fb−1, at a center-of-mass energy of 8 TeV. The event selection requires at least two jets and no isolated leptons. The razor variables are used to quantify the transverse momentum balance in the jet momenta. The study is performed separately for events with and without jets originating from b quarks. The observed yields are consistent with the expected backgrounds and, depending on the nature of the production mechanism, dark matter production at the LHC is excluded at 90{\%} confidence level for a mediator mass scale Λ below 1 TeV. The use of razor variables yields results that complement those previously published.[Figure not available: see fulltext.]",
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AB - A search for dark matter particles directly produced in proton-proton collisions recorded by the CMS experiment at the LHC is presented. The data correspond to an integrated luminosity of 18.8 fb−1, at a center-of-mass energy of 8 TeV. The event selection requires at least two jets and no isolated leptons. The razor variables are used to quantify the transverse momentum balance in the jet momenta. The study is performed separately for events with and without jets originating from b quarks. The observed yields are consistent with the expected backgrounds and, depending on the nature of the production mechanism, dark matter production at the LHC is excluded at 90% confidence level for a mediator mass scale Λ below 1 TeV. The use of razor variables yields results that complement those previously published.[Figure not available: see fulltext.]

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