Search for resonances and quantum black holes using dijet mass spectra in proton-proton collisions at sqrt(s)= 8 TeV

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Abstract

A search for resonances and quantum black holes is performed using the dijet mass spectra measured in pffiffi proton-proton collisions at s 1⁄4 8 TeV with the CMS detector at the LHC. The data set corresponds to an integrated luminosity of 19.7 fb−1. In a search for narrow resonances that couple to quark-quark, quark- gluon, or gluon-gluon pairs, model-independent upper limits, at 95% confidence level, are obtained on the production cross section of resonances, with masses above 1.2 TeV. When interpreted in the context of specific models the limits exclude string resonances with masses below 5.0 TeV; excited quarks below 3.5 TeV; scalar diquarks below 4.7 TeV; W0 bosons below 1.9 TeV or between 2.0 and 2.2 TeV; Z0 bosons below 1.7 TeV; and Randall-Sundrum gravitons below 1.6 TeV. A separate search is conducted for narrow resonances that decay to final states including b quarks. The first exclusion limit is set for excited b quarks, with a lower mass limit between 1.2 and 1.6 TeV depen
Original languageEnglish
Pages (from-to)052009
JournalPhys. Rev.http://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.052009
DOIs
StatePublished - Mar 12 2015

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