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Title: Search for Third-Generation Scalar Leptoquarks in the t$$\tau$$ Channel in Proton-Proton Collisions at $$\sqrt{s}$$ = 8 TeV

A search for pair production of third-generation scalar leptoquarks decaying to top quark and $$\tau$$ lepton pairs is presented using proton-proton collision data at a center-of-mass energy of $$\sqrt{s}$$ = 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 $$\tau$$ 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 $$\tau$$ 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 $$\tau$$ lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling λ' 333.
Authors:
Publication Date:
OSTI Identifier:
1212731
Report Number(s):
FERMILAB-PUB--15-109-CMS; CERN-PH-EP--2015-063; CMS-EXO--14-008
Journal ID: ISSN 1029-8479; arXiv eprint number arXiv:1503.09049; TRN: US1500634
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2015; Journal Issue: 7; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
CMS Collaboration
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Experiment-HEP