3,786 research outputs found
First CMS results at 13 TeV
No full textMeasurements of b-hadron and quarkonium production cross sections provide essential information to understand QCD. This talk will show new measurements of double-differential production cross sections vs. transverse momentum p(T) and rapidity y, at center-of-mass energy root s = 13 TeV, performed by CMS experiment with data collected in 2015. Comparisons with results obtained at root s = 7 TeV will be shown
B+ and Onia cross sections at 13 TeV at CMS
No full textMeasurements of B+ and quarkonium production cross sections provide essential information to understand QCD. This talk will show measurements of double-differential production cross sections vs. transverse momentum pT and rapidity y at center-of-mass energy of sqrt(s) = 13 TeV performed by the CMS experiment. Comparisons with expectations and results obtained at sqrt(s) = 7 TeV will be shown
Heavy flavor results from CMS
No full textHeavy flavor particles produced in LHC collisions at and constitute an excellent opportunity to test the standard model and probe for new physics effects. Recent results by the CMS Collaboration on heavy flavor production and decays are presented.Heavy flavor particles produced in LHC pp collisions at and 13 TeV constitute an excellent opportunity to test the Standard Model and probe for new physics effects. Recent results by the CMS Collaboration on heavy flavor production and decays are presented
Measurement of the CP violating phase with CMS and ATLAS
No full textThe phase is the key parameter for the CP-violation of the - system. An angular and proper decay time analysis is applied to the events. Using a data sample collected by the CMS and ATLAS experiments in LHC Run1, the signal candidates are reconstructed and are used to extract the phase . We present the latest update on the results in this decay channel.The phase is the key parameter for the CP-violation of the - system. An angular and proper decay time analysis is applied to the events. Using a data sample collected by the CMS and ATLAS experiments in LHC Run1, the signal candidates are reconstructed and are used to extract the phase . We present the latest update on the results in this decay channel
Production rates and branching fractions of heavy hadrons & quarkonia at LHC experiments
No full textMeasurements of production cross-sections of inclusive -hadrons pairs, bottom mesons and baryons, and quarkonia at LHC will be shown. Recent measurements of branching fractions of bottom baryons, bottom mesons with baryons in the final state, and a new result about a search for intermediate states in meson decay will also be shown
Exotic charmonium spectroscopy with CMS
No full textThe latest results of CMS in the area of exotic quarkonium decays will be presented: observation of a peaking structure in mass spectrum in the decay , search for new bottomonium states in mass spectrum, measurement of prompt pair production.The latest results of CMS in the area of exotic quarkonium decays will be presented: observation of a peaking structure in mass spectrum in the decay , search for new bottomonium states in mass spectrum, measurement of prompt pair production
Rare Decays and other Electroweak b-physics Measurements at ATLAS and CMS
No full textIn b decay the tree-level process with W exchange is hardly modified by new physics beyond the standard model; the search for new physics hints can be done by exploiting the sensitivity of some processes to loop diagrams. Such processes include rare FCNC decays, whose branching ratio or angular distributions could be modified by the presence of new degrees of freedom in the loops. Another process where new physics could show itself is Bs meson mixing, where the CP violation phase is predicted by SM to be very small and the observation of a significant violation would indicate the presence of new processes
CMS results on flavour physics
No full textThanks to the excellent tracking and muon identification performance, combined with a flexible trigger system, the CMS experiment at the Large Hadron Collider is conducting a rich and competitive program of measurements in the field of heavy flavor physics. In this talk we review our results on heavy flavour physics, based on a data sample collected by the CMS detector
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