The discovery of a Higgs boson at the Large Hadron Collider (LHC) motivates searches for physics beyond the Standard Model (SM) in channels involving coupling to the Higgs boson. A search for a massive resonance decaying into a standard model Higgs boson (h) and a W or Z boson or two a standard model Higgs bosons is performed. Final states with different number of leptons and where the Higgs...
Beyond the standard model theories like Extra-Dimensions and Composite Higgs scenarios predict the existence of very heavy resonances compatible with a spin 0 (Radion),spin 1 (W’, Z’) and spin 2 (Graviton) particle with large branching fractions in pairs of standard model bosons and negligible branching fractions to light fermions. We present an overview of searches for new physics containing...
Many extensions to the Standard Model predicts new particles decaying into
two bosons (WW, WZ, ZZ, Zgamma) making these important signatures in the
search for new physics. Searches for such diboson resonances have been
performed in final states with different numbers of leptons, photons and
jets where new jet substructure techniques to disentangle the hadronic
decay products in highly boosted...
The observation of a new resonance in the invariant mass spectrum of two or more objects would be a clear signal for the presence of new physics. Resonance searches in a multitude of final states are therefore a key component of the search strategy for new phenomena at the LHC. In this talk, results from searches in final states containing leptons, photons, and jets performed with the CMS...
When an excess appears in LHC data, we should compare the results with broad classes of models, to get an immediate sense of which kinds of BSM theories could conceivably be relevant. Often, the new physics is likely to be an s-channel resonance. In this case, a simplified model of the resonance can translate an estimated signal cross section into bounds on the product of the dominant...
In this talk we show that a study of the jet energy correlation functions provides a useful handle to characterize the properties (e.g. spin and color charge) of light resonances which decay only to jets.
Experiments at the LHC may discover a dijet resonance unpredicted by the Standard Model and therefore indicative of Beyond the Standard Model (BSM) physics. In this case, physicists would wonder: what BSM theories are consistent with the unexpected resonance? We examine models featuring a ``leptophobic graviton''--a phenomenological spin-2 color-singlet particle with color-exclusive...
We present the NLO QCD corrections to the pair production of heavy
vector color octets in Proton-Proton collisions, as they appear in various
new physics models like Universal Extra Dimensions. To this end we construct
a two-sided Coloron model exhibiting all relevant features while retaining renormalizability without sensitivity to the unknown UV completion of the models. In this...
In this paper, we explore the discriminatory power of the matrix element method in constraining the $L_\mu-L_\tau$ model at the LHC. The $Z'$ boson associated with the spontaneously broken $U(1)_{L_\mu-L_\tau}$ symmetry only interacts with the second and third generation of leptons, and is thus difficult to produce at the LHC. We argue that the best channels for discovering this $Z'$ are in $Z...
