Ambresh Shivaji

ttH anomalous coupling in double Higgs production

A bstractWe study the effects of top-Higgs anomalous coupling in the production of a pair of Higgs boson via gluon fusion at the Large Hadron Collider (LHC). The introduction of anomalous ttH coupling can alter the hadronic double Higgs boson cross section and can lead to characteristic changes in certain kinematic distributions. We perform a global analysis based on available LHC data on the Higgs to constrain the parameters of ttH anomalous coupling. Possible overlap of the predictions due to anomalous ttH coupling with those due to anomalous trilinear Higgs coupling is also studied. We briefly discuss the effect of the anomalous ttH coupling on the HZ production via gluon fusion which is one of the main backgrounds in the HH → γγb

Di-Vector Boson + Jet Production via Gluon Fusion at Hadron Colliders

\overline{b}

Effect of anomalous couplings on the associated production of a single top quark and a Higgs boson at the LHC

channel.

Production of γZg and associated processes via gluon fusion at hadron colliders

We study the production of two electro-weak vector bosons in association with a jet via gluon fusion. In particular we consider the production of

Gluon Fusion Contribution to

\gamma Zg

VHj

,

Production at Hadron Colliders

ZZg

Constraints on CP-violating gauge-Higgs operators

and

Distinguishing

W^{+}W^{-}g

CP

at hadron colliders and compute their cross-sections. Such processes have already produced large number of events at the Large Hadron Collider (LHC) by now. These processes can be background to the Higgs boson production and a number of beyond the standard model scenarios. Therefore it is important to know the values of their contribution. The calculation is based on conventional Feynman diagram approach. In particular we find that the process