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Search for pair production of first or second generation leptoquarks in proton-proton collisions at root s=7 TeV using the ATLAS detector at the LHC
DESY, D-2000 Hamburg, Germany .
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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2011 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 83, no 11, 112006- p.Article in journal (Refereed) Published
Abstract [en]

This paper describes searches for the pair production of first or second generation scalar leptoquarks using 35 pb(-1) of proton-proton collision data recorded by the ATLAS detector at root s = 7 TeV. Leptoquarks are searched in events with two oppositely-charged muons or electrons and at least two jets, and in events with one muon or electron, missing transverse momentum and at least two jets. After event selection, the observed yields are consistent with the predicted backgrounds. Leptoquark production is excluded at the 95% CL for masses M-LQ < 376 (319) GeV and M-LQ < 422 (362) GeV for first and second generation scalar leptoquarks, respectively, when assuming the branching fraction of a leptoquark to a charged lepton is equal to 1.0 (0.5).

Place, publisher, year, edition, pages
2011. Vol. 83, no 11, 112006- p.
Keyword [en]
SU(15) GRAND UNIFICATION, CONSTRAINTS, BREAKING, BOSONS, QUARKS, MODEL, HERA
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-35921DOI: 10.1103/PhysRevD.83.112006ISI: 000291658800002Scopus ID: 2-s2.0-79960830731OAI: oai:DiVA.org:kth-35921DiVA: diva2:429756
Funder
Swedish Research Council
Note
QC 20110705Available from: 2011-07-05 Created: 2011-07-05 Last updated: 2017-12-11Bibliographically approved

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Strandberg, Jonas

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Grahn, Karl-JohanLund-Jensen, BengtStrandberg, JonasLafaye, Remi
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