Search for third-generation scalar leptoquarks in the tτ channel in proton-proton collisions at √s=8 TeV

The CMS Collaboration

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A search for pair production of third-generation scalar leptoquarks decaying to top quark and τ lepton pairs is presented using proton-proton collision data at a center-of-mass energy of s=8$$ \sqrt{s}=8 $$ TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb−1. The search is performed using events that contain an electron or a muon, a hadronically decaying τ lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a τ lepton, the existence of pair produced, charge −1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a τ lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling λ333 .

Original languageEnglish
Article number42
JournalJournal of High Energy Physics
Volume2015
Issue number7
DOIs
Publication statusPublished - Jul 24 2015

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leptons
scalars
collisions
protons
quarks
pair production
center of mass
muons
confidence
parity
luminosity
detectors
decay
predictions
electrons
energy

Keywords

  • Beyond Standard Model
  • Hadron-Hadron Scattering

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Search for third-generation scalar leptoquarks in the tτ channel in proton-proton collisions at √s=8 TeV. / The CMS Collaboration.

In: Journal of High Energy Physics, Vol. 2015, No. 7, 42, 24.07.2015.

Research output: Contribution to journalArticle

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abstract = "A search for pair production of third-generation scalar leptoquarks decaying to top quark and τ lepton pairs is presented using proton-proton collision data at a center-of-mass energy of s=8$$ \sqrt{s}=8 $$ TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb−1. The search is performed using events that contain an electron or a muon, a hadronically decaying τ lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a τ lepton, the existence of pair produced, charge −1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95{\%} confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a τ lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling λ333 ′.",
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AU - Adam, W.

AU - Asilar, E.

AU - Bergauer, T.

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AU - TrebererTreberspurg, W.

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AU - Vesztergombi, G.

AU - Béni, N.

AU - Czellar, S.

AU - Karancsi, J.

AU - Molnár, J.

AU - Pálinkás, J.

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AB - A search for pair production of third-generation scalar leptoquarks decaying to top quark and τ lepton pairs is presented using proton-proton collision data at a center-of-mass energy of s=8$$ \sqrt{s}=8 $$ TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fb−1. The search is performed using events that contain an electron or a muon, a hadronically decaying τ lepton, and two or more jets. The observations are found to be consistent with the standard model predictions. Assuming that all leptoquarks decay to a top quark and a τ lepton, the existence of pair produced, charge −1/3, third-generation leptoquarks up to a mass of 685 GeV is excluded at 95% confidence level. This result constitutes the first direct limit for leptoquarks decaying into a top quark and a τ lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling λ333 ′.

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