Conveners
SM Higgs II
- Matthew Buckley (Fermilab)
Ian James Anderson
(Johns Hopkins University (US))
05/05/2014, 17:00
We constrain the total Higgs boson width using off-shell production and decay to four leptons, 4ℓ, or two leptons plus two neutrinos, 2ℓ2ν, with ℓ=e,μ. The analysis is based on the data collected in 2011 and 2012 by the CMS experiment at the LHC, corresponding to integrated luminosities of ${\cal L}=19.7fb^{−1}$ and ${\cal L}=5.1 fb^{-1}$ at center-of-mass energies of √s=8 TeV and √s=7 TeV...
Brod Joachim
(University of Cincinnati)
05/05/2014, 17:15
Discovering CP-violating effects in the Higgs sector would constitute an indisputable sign of physics beyond the Standard Model. I will discuss constraints on the CP-violating Higgs-boson couplings to top and bottom quarks as well as to tau leptons from low-energy bounds on electric dipole moments. In addition, I will provide
present and future projections of the sensitivities and...
Mr
Gabe Shaughnessy Shaughnessy
(University of Wisconsin)
05/05/2014, 17:30
We simulate the measurement of the triscalar Higgs coupling at LHC(8,14) via pair production of h(125 GeV). We find that the most promising hh final state is bb + gamma gamma. We account for deviations of the triscalar coupling from its SM value and study the effects of this coupling on the hh cross-section and distributions with cut-based and multivariate methods. Our fit to the hh production...
Dr
Eleni Vryonidou
(Universite catholique de Louvain)
05/05/2014, 17:45
I will present predictions for the SM-Higgs-pair production channels at the LHC: gluon-gluon fusion, VBF, and top-pair, W, Z and single-top associated production. Results are at the NLO accuracy in QCD, and matched to parton showers by means of the MC@NLO method; hence, they are fully differential. With the exception of the gluon-gluon fusion process, for which a special treatment was needed...
Chien-Yi Chen
(Brookhaven National Laboratory)
05/05/2014, 18:00
We derive bounds from oblique parameters on the dimension-$6$ operators of an
effective field theory of electroweak gauge bosons and the Higgs doublet. The loop-
induced contributions to the $\Delta S$, $\Delta T$, and $\Delta U$ oblique parameters
are sensitive to these contributions and we pay particular attention to the role of
renormalization when computing loop corrections in the...
Prof.
Stephen Martin
(Northern Illinois University)
05/05/2014, 18:15
The vacuum expectation value of the Standard Model Higgs field can be computed in terms of the Lagrangian parameters using the effective potential. However, the perturbative calculation of the effective potential at any finite loop order contains problematic contributions from Goldstone bosons with small but non-zero field-dependent masses. As the field-dependent Goldstone boson mass...
Harikrishnan Ramani
(Yang Institute Of Theoretical Physics)
05/05/2014, 18:30
WW production in the Standard Model is an important channel on its own and also a critical background to Higgs studies at the LHC. In all public LHC measurements thus far this channel and has had excesses compared to the SM prediction. We explore transverse momentum resummation effects on the the shape of the pp->W+W-> dileptonic differential cross section, which translates into changes in...