Searches for the pair production of scalar leptoquarks at CMS

18th International Symposium on Particles Strings and Cosmology

Baumgartel, Darin^1

Northeastern University, Department of Physics, 111 Dana Research Center, 360 Huntington Avenue, Boston, 02115, MA, United States^1

关键词: Branching fractions;    Confidence levels;    Pair production;    Proton proton collisions;    Second generation;    The standard model;    Third generation;    Transverse energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/485/1/012053/pdf
DOI  :  10.1088/1742-6596/485/1/012053

来源: IOP

【 摘 要 】

Results are presented for searches for leptoquark (LQ) pair production using 1.8 -5.0 fb-1of proton-proton collision data at = 7 TeV collected by the CMS detector at the LHC. First- and second-generation scalar leptoquarks are searched for in final states with either two leptons and two jets (jj) or one lepton, missing transverse energy (), and two jets (vjj). Third-generation leptoquarks are searched for in the final state with two b-tagged jets and large (vvbb). No significant excess beyond the standard model predictions is found and 95% confidence level (CL) upper limits are set on the scalar leptoquark pair production cross section in each channel. Limits are calculated for a range of leptoquark mass and for a variable branching fraction (β) of the leptoquark to a charge lepton and a quark. These limits are the most stringent to date.