Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at √s=7  TeV

Serguei Chatrchyan; Lukas Bäni; Pierluigi Bortignon; Marco A Buchmann; Bruno Casal Laraña; Nicolas Chanon; Amanda Deisher; Günther Dissertori; Michael Dittmar; Mauro Donegà; Marc Dünser; Jürg Eugster; Klaus Freudenreich; Christoph Grab; Dmitry Hits; Pierre Lecomte; Werner Lustermann; Andrea C Marini; Pablo Martinez Ruiz Del Arbol; Niklas Mohr; Filip Moortgat; Christoph Nägeli; Pascal Nef; Francesca Nessi-Tedaldi; Francesco Pandolfi; Luc Pape; Felicitas Pauss; Marco Peruzzi; Frédéric J Ronga; Marco Rossini; Leonardo Sala; Ann-Karin Sanchez; Andrey Starodumov; Benjamin Stieger; Maiko Takahashi; Ludwig Tauscher; Alessandro Thea; Konstantinos Theofilatos; Daniel Treille; Christina Urscheler; Rainer Wallny; Hannsjörg A Weber; Lukas Wehrli; CMS Collaboration

doi:10.1103/PhysRevLett.110.081801

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Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at √s=7 TeV

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Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at √s=7 TeV

Serguei Chatrchyan, Lukas Bäni, Pierluigi Bortignon, Marco A Buchmann, Bruno Casal Laraña, Nicolas Chanon, Amanda Deisher, Günther Dissertori, Michael Dittmar, Mauro Donegà, …

Physical review letters, Vol.110(8), 081801

02/01/2013

DOI: 10.1103/PhysRevLett.110.081801

PMID: 23473129

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Abstract

Results are presented from a search for the pair production of third-generation scalar and vector leptoquarks, as well as for top squarks in R-parity-violating supersymmetric models. In either scenario, the new, heavy particle decays into a τ lepton and a b quark. The search is based on a data sample of pp collisions at √s=7 TeV, which is collected by the CMS detector at the LHC and corresponds to an integrated luminosity of 4.8 fb−1. The number of observed events is found to be in agreement with the standard model prediction, and exclusion limits on mass parameters are obtained at the 95% confidence level. Vector leptoquarks with masses below 760 GeV are excluded and, if the branching fraction of the scalar leptoquark decay to a τ lepton and a b quark is assumed to be unity, third-generation scalar leptoquarks with masses below 525 GeV are ruled out. Top squarks with masses below 453 GeV are excluded for a typical benchmark scenario, and limits on the coupling between the top squark, τ lepton, and b quark, λ′333 are obtained. These results are the most stringent for these scenarios to date. ISSN:0031-9007 ISSN:1079-7114

High Energy Physics

Experiment

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Title: Subtitle: Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at √s=7 TeV
Creators: Serguei Chatrchyan
Lukas Bäni
Pierluigi Bortignon
Marco A Buchmann
Bruno Casal Laraña
Nicolas Chanon
Amanda Deisher
Günther Dissertori
Michael Dittmar
Mauro Donegà
Marc Dünser
Jürg Eugster
Klaus Freudenreich
Christoph Grab
Dmitry Hits
Pierre Lecomte
Werner Lustermann
Andrea C Marini
Pablo Martinez Ruiz Del Arbol
Niklas Mohr
Filip Moortgat
Christoph Nägeli
Pascal Nef
Francesca Nessi-Tedaldi
Francesco Pandolfi
Luc Pape
Felicitas Pauss
Marco Peruzzi
Frédéric J Ronga
Marco Rossini
Leonardo Sala
Ann-Karin Sanchez
Andrey Starodumov
Benjamin Stieger
Maiko Takahashi
Ludwig Tauscher
Alessandro Thea
Konstantinos Theofilatos
Daniel Treille
Christina Urscheler
Rainer Wallny
Hannsjörg A Weber - RWTH Aachen University
Lukas Wehrli
CMS Collaboration
Contributors: Y Onel (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Physical review letters, Vol.110(8), 081801
DOI: 10.1103/PhysRevLett.110.081801
PMID: 23473129
NLM abbreviation: Phys Rev Lett
ISSN: 0031-9007
eISSN: 1079-7114
Publisher: American Physical Society
Grant note: DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000001, name: National Science Foundation
Language: English
Date published: 02/01/2013
Academic Unit: Physics and Astronomy
Record Identifier: 9984200040902771

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