کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1851047 1528820 2014 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
پیش نمایش صفحه اول مقاله
Constraints on the Higgs boson width from off-shell production and decay to Z-boson pairs
چکیده انگلیسی

Constraints are presented on the total width of the recently discovered Higgs boson, ΓHΓH, using its relative on-shell and off-shell production and decay rates to a pair of Z bosons, where one Z boson decays to an electron or muon pair, and the other to an electron, muon, or neutrino pair. The analysis is based on the data collected by the CMS experiment at the LHC in 2011 and 2012, corresponding to integrated luminosities of 5.1 fb−15.1 fb−1 at a center-of-mass energy s=7 TeV and 19.7 fb−119.7 fb−1 at s=8 TeV. A simultaneous maximum likelihood fit to the measured kinematic distributions near the resonance peak and above the Z-boson pair production threshold leads to an upper limit on the Higgs boson width of ΓH<22 MeVΓH<22 MeV at a 95% confidence level, which is 5.4 times the expected value in the standard model at the measured mass of mH=125.6 GeVmH=125.6 GeV.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 736, 7 September 2014, Pages 64–85
نویسندگان
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