A Measurement of the width of the $W$ vector boson in $p\bar{p}$ collisions at 1.8-TeV

1999 ◽  
Author(s):  
Adam Dean Hardman
Keyword(s):  
Vector Boson ◽  
W Vector Boson

CHIRAL SYMMETRY AND MESON LOOP MODEL FOR NON-LEPTONIC K AND D WEAK DECAYS

1991 ◽  
Vol 06 (07) ◽  
pp. 543-551 ◽  
Author(s):  
R.E. KARLSEN ◽  
M.D. SCADRON
Keyword(s):  
Chiral Symmetry ◽  
Vector Boson ◽  
Loop Model ◽  
First Order ◽  
Weak Decays ◽  
Meson Loop ◽  
W Vector Boson

We show that K→ππ and charmed [Formula: see text] decays can be understood using chiral symmetry and a meson loop model to simulate first order weak decays driven by the heavy-W vector boson.

scholarly journals Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
A. M. Sirunyan ◽  
◽  
A. Tumasyan ◽  
W. Adam ◽  
T. Bergauer ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Standard Model ◽  
Confidence Level ◽  
Branching Fraction ◽  
Vector Boson ◽  
Boson Mass ◽  
Higgs Boson Mass ◽  
Vector Boson Fusion ◽  
Upper Limit ◽  
The Standard Model

Abstract A search is presented for a Higgs boson that is produced via vector boson fusion and that decays to an undetected particle and an isolated photon. The search is performed by the CMS collaboration at the LHC, using a data set corresponding to an integrated luminosity of 130 fb−1, recorded at a center-of-mass energy of 13 TeV in 2016–2018. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for production via vector boson fusion and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a Higgs boson mass of 125 GeV, assuming the standard model production rates, the observed (expected) 95% confidence level upper limit on the branching fraction is 3.5 (2.8)%. This is the first search for such decays in the vector boson fusion channel. Combination with a previous search for Higgs bosons produced in association with a Z boson results in an observed (expected) upper limit on the branching fraction of 2.9 (2.1)% at 95% confidence level.

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