We discuss the conditions under which the flavor structure of SUSY model induces, either radiatively or through mixing, new flavor-violating interactions in the Higgs sector. The radiative flavor mediation mechanism is illustrated using the minimal SUSY extension of the SM (MSSM) with generic trilinear A-terms, and applied to evaluate the corrections to Lepton Flavor-Violating (LFV) and Flavor-...

We study the implications of minimal flavor violating low energy supersymmetry scenarios for the search of new physics in the B and Higgs sectors at the Tevatron collider and the LHC. We show that the already stringent Tevatron bound on the decay rate Bs → μ+μ− sets strong constraints on the possibility of generating large corrections to the mass difference ∆Ms of the Bs eigenstates. We also sh...

The measurement of Higgs pair production will be one of the cornerstones of the LHC physics program in the coming years, with the upcoming high-energy and high-luminosity phase. The Vector Boson Fusion (VBF) production channel probes directly the coupling of new physics and of Higgs to gauge bosons, in addition to reducing background contribution. The production via VBF of an heavy object on-sh...

Basic physics concepts of the QGSJET model are discussed, starting from the general picture of high energy hadronic interactions and addressing in some detail the treatment of multiple scattering processes, contributions of “soft” and “semihard” parton dynamics, implementation of non-linear interaction effects. The predictions of the new model version (QGSJET II-03) are compared to selected acc...

We construct a simple theory in which the fine-tuning of the standard model is significantly reduced. Radiative corrections to the quadratic part of the scalar potential are constrained to be symmetric under a global U(4) × U(4)′ symmetry due to a discrete Z2 “twin” parity, while the quartic part does not possess this symmetry. As a consequence, when the global symmetry is broken the Higgs fiel...

Abstarct In this article we study the effect of Hg contact interactions on H production by gluon fusion at a hadron collider. Two such d=6 operators have been considered. The present precision for measuring αs implies that the lower bound on the scale for the CP even operator O1 must be around 2 TeV. Whereas the precision for measuring dn gives rise to a lower bound of about 10 TeV on the scale...

The particle production in hadron-nucleon (h-N), hadron-nucleus (h-A) and nucleus-nucleus (A-A) collisions at high energies are studied in view of the multi-peripheral model. A multi-peripheral T-matrix element is assumed with multi surface parameter that is functionally dependent on the number of particles in the final state and control the kinematical path of the reaction. A Monte Carlo code ...

Parity-violating (pv) effects in inclusive hadron and jet productions in high energy hadronhadron collisions are analyzed. Such effects arise from the interference between strong and weak amplitudes. This interference gives rise to a nonzero value of the pv parameters AL and PL, where AL measures the difference in the inclusive cross sections of, for example, p + p → jet +X (X=anything), with o...

We study the decays of a standard model-like MSSM Higgs boson to pairs of neutralinos, each of which subsequently decays promptly to a photon and a gravitino. Such decays can arise in supersymmetric scenarios where supersymmetry breaking is mediated to us by gauge interactions with a relatively light gauge messenger sector (Mmess . 100TeV). This process gives rise to a collider signal consistin...

In this contribution we describe the new model of multiple partonic interactions (MPI) that has been implemented in Herwig++. Tuning its two free parameters is enough to find a good description of CDF underlying event data. We show extrapolations to the LHC and compare them to results from other models.