نتایج جستجو برای: hadron decay
تعداد نتایج: 88679 فیلتر نتایج به سال:
One of the major goals of the CERN Large Hadron Collider (LHC) is the understanding of the mechanism of electroweak (EW) symmetry breaking [1]. In this context, vector-boson fusion (VBF) processes form a promising class of reactions: Higgs production in VBF, i.e. the reaction qq → qqH, has been proposed as a particularly clean channel for the discovery of the Higgs boson and a later determinati...
Measurements are reported of the WZ and ZZ production cross sections in proton-proton collisions at √ s = 8 TeV in final states where one Z boson decays to b-tagged jets. The other gauge boson, either W or Z, is detected through its leptonic decay (either W → eν, μν or Z → e + e − , μ + μ − , or νν). The results are based on data corresponding to an integrated luminosity of 18.9 fb −1 collected...
Article history: Received 27 October 2011 Received in revised form 16 January 2012 Accepted 31 January 2012 Available online 3 February 2012 Editor: H. Weerts Results of three searches are presented for the production of supersymmetric particles decaying into final states with missing transverse momentum and exactly two isolated leptons, e or μ. The analysis uses a data sample collected during ...
This note presents an updated measurement of W+W− production, and first measurements of WZ and ZZ production in proton proton collisions at √ s = 7 TeV with the CMS experiment at the Large Hadron Collider. Results are based on data corresponding to an integrated luminosity of 1.1 fb−1. The leptonic decay modes of the W and Z bosons are considered and the final states include electrons, muons, t...
As predicted by numerous extensions of the Standard Model, leptoquarks (LQ) are hypothetical bosons allowing lepton-quark transitions. Under the assumption that they couple only to quarks and leptons of the same generation, three generations of leptoquarks can be distinguished. The search for the pair production of second generation scalar leptoquarks has been carried out in pp collisions at √ ...
We discuss the possibility of extracting |V cb | from the future measurement at LHC of the B c → J/ψ µ + ν decay rate followed by the leptonic decay J/ψ → µ + µ −. We examine in detail the influence of the measurement of the muons' momenta and vertex reconstruction in the final uncertainty of |V cb |, as well as the required theoretical inputs at both the production and weak decay level, and th...
We model tri-bimaximal lepton mixing from first principles in a way that avoids the problem of the vacuum alignment characteristic of such models. This is achieved by using a softly broken A4 symmetry realized with an isotriplet fermion, also triplet under A4. No scalar A4-triplet is introduced. This represents one possible realization of general schemes characterized by the minimal set of eith...
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