There are many indirect and direct experimental indications that the new particle H discovered by the ATLAS and CMS Collaborations has spin zero and (mostly) positive parity, and that its couplings to other particles are correlated with their masses. To a high degree of confidence, it is a Higgs boson, and here we examine the extent to which its couplings resemble those of the single Higgs boson of the Standard Model. Our global analysis of its couplings to fermions and massive bosons determines that they have the same relative sign as in the Standard Model. We also show directly that these couplings are highly consistent with a dependence on particle masses that is linear to within a few %, and scaled by the conventional electroweak symmetry-breaking scale to within 10%. We also give constraints on loop-induced couplings, on the total Higgs decay width, and on possible invisible decays of the Higgs boson under various assumptions.
A combination of three LHCb measurements of the CKM angle is presented. The decays and are used, where denotes an admixture of and mesons, decaying into , , , , , or final states. All measurements use a dataset corresponding to of integrated luminosity. Combining results from decays alone a best-fit value of is found, and confidence intervals are set The best-fit value of found from a combination of results from decays alone, is , and the confidence intervals are set, without constraint at CL. The combination of results from and decays gives a best-fit value of and the confidence intervals are set. All values are expressed modulo 180°, and are obtained taking into account the effect of – mixing.
The angular distribution and differential branching fraction of the decay B+ -> K+mu(+)mu(-) are studied with a dataset corresponding to 1.0fb(-1) of integrated luminosity, collected by the LHCb experiment. The angular distribution is measured in bins of dimuon invariant mass squared and found to be consistent with Standard Model expectations. Integrating the differential branching fraction over the full dimuon invariant mass range yields a total branching fraction of B (B+ -> K+mu(+)mu(-)) = (4.36 +/- 0.15 +/- 0.18) x 10(-7). These measurements are the most precise to date of the B+ -> K+mu(+)mu(-) decay.
The angular distributions and the differential branching fraction of the decay B-0 -> K*(892)(0)mu(+)mu(-) are studied using a data sample corresponding to an integrated luminosity of 5.2 fb(-1) collected with the CMS detector at the LHC in pp collisions at root s = 7 TeV. From more than 400 signal decays, the forward-backward asymmetry of the muons, the K*(892)(0) longitudinal polarization fraction, and the differential branching fraction are determined as a function of the square of the dimuon invariant mass. The measurements are in good agreement with standard model predictions. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.