Results are presented from a search for the pair production of first- and second-generation scalar leptoquarks in proton-proton collisions at sqrt(s)=7 TeV. The data sample corresponds to an integrated luminosity of 5.0 fb−1, collected by the CMS detector at the LHC. The search signatures involve either two charged leptons of the same flavor (electrons or muons) and at least two jets or a single charged lepton (electron or muon), missing transverse energy, and at least two jets. If the branching fraction of the leptoquark decay into a charged lepton and a quark is assumed to be beta=1, leptoquark pair production is excluded at the 95% confidence level for masses below 830 GeV and 840 GeV for the first and second generations, respectively. For beta=0.5, masses below 640 GeV and 650 GeV are excluded. These limits are the most stringent to date.
Search for pair production of first- and second-generation scalar leptoquarks in pp collisions at sqrt[s]=7 TeV
V. Sola;AMAPANE, Nicola Carlo;ARGIRO', Stefano;COSTA, Marco;MIGLIORE, Ernesto;MONACO, Vincenzo;MUSICH, MARCO;OBERTINO, Maria Margherita;PELLICCIONI, Mario;ROMERO, Alessandra;SACCHI, Roberto;SOLANO, Ada Maria;BELLAN, Riccardo;COVARELLI, Roberto;
2012-01-01
Abstract
Results are presented from a search for the pair production of first- and second-generation scalar leptoquarks in proton-proton collisions at sqrt(s)=7 TeV. The data sample corresponds to an integrated luminosity of 5.0 fb−1, collected by the CMS detector at the LHC. The search signatures involve either two charged leptons of the same flavor (electrons or muons) and at least two jets or a single charged lepton (electron or muon), missing transverse energy, and at least two jets. If the branching fraction of the leptoquark decay into a charged lepton and a quark is assumed to be beta=1, leptoquark pair production is excluded at the 95% confidence level for masses below 830 GeV and 840 GeV for the first and second generations, respectively. For beta=0.5, masses below 640 GeV and 650 GeV are excluded. These limits are the most stringent to date.File | Dimensione | Formato | |
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PhysRevD.86.052013.pdf
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