Search for bottom squark pair production in proton–proton collisions at √s=13 TeV with the ATLAS detector

The ATLAS Collaboration

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The result of a search for pair production of the supersymmetric partner of the Standard Model bottom quark (b~1) is reported. The search uses 3.2 fb- 1 of pp collisions at s=13 TeV collected by the ATLAS experiment at the Large Hadron Collider in 2015. Bottom squarks are searched for in events containing large missing transverse momentum and exactly two jets identified as originating from b-quarks. No excess above the expected Standard Model background yield is observed. Exclusion limits at 95 % confidence level on the mass of the bottom squark are derived in phenomenological supersymmetric R-parity-conserving models in which the b~1 is the lightest squark and is assumed to decay exclusively via b~1→bχ~10, where χ~10 is the lightest neutralino. The limits significantly extend previous results; bottom squark masses up to 800 (840) GeV are excluded for the χ~10 mass below 360 (100) GeV whilst differences in mass above 100 GeV between the b~1 and the χ~10 are excluded up to a b~1 mass of 500 GeV.

Original languageEnglish (US)
Article number547
JournalEuropean Physical Journal C
Volume76
Issue number10
DOIs
StatePublished - Oct 1 2016

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pair production
Detectors
collisions
detectors
Colliding beam accelerators
quarks
Momentum
exclusion
transverse momentum
confidence
parity
Experiments
decay

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

Search for bottom squark pair production in proton–proton collisions at √s=13 TeV with the ATLAS detector. / The ATLAS Collaboration.

In: European Physical Journal C, Vol. 76, No. 10, 547, 01.10.2016.

Research output: Contribution to journalArticle

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abstract = "The result of a search for pair production of the supersymmetric partner of the Standard Model bottom quark (b~1) is reported. The search uses 3.2 fb- 1 of pp collisions at s=13 TeV collected by the ATLAS experiment at the Large Hadron Collider in 2015. Bottom squarks are searched for in events containing large missing transverse momentum and exactly two jets identified as originating from b-quarks. No excess above the expected Standard Model background yield is observed. Exclusion limits at 95 {\%} confidence level on the mass of the bottom squark are derived in phenomenological supersymmetric R-parity-conserving models in which the b~1 is the lightest squark and is assumed to decay exclusively via b~1→bχ~10, where χ~10 is the lightest neutralino. The limits significantly extend previous results; bottom squark masses up to 800 (840) GeV are excluded for the χ~10 mass below 360 (100) GeV whilst differences in mass above 100 GeV between the b~1 and the χ~10 are excluded up to a b~1 mass of 500 GeV.",
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