A search for pair production of third-generation scalar leptoquarks decaying to top quark and Ï lepton pairs is presented using proton-proton collision data at a center-of-mass energy of s=8$$ sqrts=8 $$ TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fbâ1. The search is performed using events that contain an electron or a muon, a hadronically decaying Ï 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 Ï lepton, the existence of pair produced, charge â1/3, 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 Ï lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling λ333 â².
Search for third-generation scalar leptoquarks in the tÏ channel in proton-proton collisions at âs=8 TeV
CAPPELLO, GIGI;COSTA, Salvatore;GIORDANO, FERDINANDO;POTENZA, Renato Carlo;TRICOMI, Alessia Rita;TUVE', Cristina Natalina;
2015-01-01
Abstract
A search for pair production of third-generation scalar leptoquarks decaying to top quark and Ï lepton pairs is presented using proton-proton collision data at a center-of-mass energy of s=8$$ sqrts=8 $$ TeV collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 19.7 fbâ1. The search is performed using events that contain an electron or a muon, a hadronically decaying Ï 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 Ï lepton, the existence of pair produced, charge â1/3, 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 Ï lepton, and may also be applied directly to the pair production of bottom squarks decaying predominantly via the R-parity violating coupling λ333 â².File | Dimensione | Formato | |
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Search for third-generation scalar leptoquarks.pdf
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