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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, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0002-8913-0981
Vise andre og tillknytning
2011 (engelsk)Inngår i: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 83, nr 11, s. 112006-Artikkel i tidsskrift (Fagfellevurdert) 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).

sted, utgiver, år, opplag, sider
2011. Vol. 83, nr 11, s. 112006-
Emneord [en]
SU(15) GRAND UNIFICATION, CONSTRAINTS, BREAKING, BOSONS, QUARKS, MODEL, HERA
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-35921DOI: 10.1103/PhysRevD.83.112006ISI: 000291658800002Scopus ID: 2-s2.0-79960830731OAI: oai:DiVA.org:kth-35921DiVA, id: diva2:429756
Forskningsfinansiär
Swedish Research Council
Merknad
QC 20110705Tilgjengelig fra: 2011-07-05 Laget: 2011-07-05 Sist oppdatert: 2017-12-11bibliografisk kontrollert

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