Measurements of Higgs boson properties in proton-proton collisions at sqrt(s)=7, 8 and 13 TeV at the CERN Large Hadron Collider

[摘要] Studies of production and decay of the spin-0 Higgs boson are described. In particular, anomalous couplings of the Higgs boson to two electroweak gauge bosons are studied from on-shell Higgs boson production with decay to 4l and WW->l nu l nu using the Run 1 data collected by the CMS detector. The constraints and techniques are improved in the Run 2 on-shell analysis of the 4l decay channel.Events from Run 1 are also analyzed for the 4l vertex information to constrain the Higgs boson lifetime from above and thereby the Higgs boson total width from below.The width is constrained further by employing the off-shell technique in the 4l decay channel.These constraints are placed using events from both Run~1 and Run~2 datasets. Assumptions on the tensor structure of the resonance and the invariant mass lineshape are relaxed by placing joint constraints with different anomalous couplings. The SM-like total width analysis is also used to place approximate joint constraints on the Higgs boson mass and width, and preliminary constraints on the value of Higgs boson mass with the value of the total width unconstrained in the fit.No significant deviation from the Standard Model is found in the analyzed anomalous couplings or in the total width, and a preliminary value of Higgs boson mass from the combined Run~1 and Run~2 dataset is provided.

[发布机构] Johns Hopkins University

[效力级别] HVV

[关键词] Higgs;HVV;width;spin;parity;CP;anomalous couplings;CMS;CERN;LHC;tracker;alignment;Physics