C. O. Escobar

Using rapidity gaps to distinguish between Higgs boson production by {ital W} and gluon fusion

The possibility of distinguishing between two Higgs boson production mechanisms, {ital W} fusion and gluon fusion, due to rapidity gap existence is investigated using the Monte Carlo event generator PYTHIA. It is shown that, considering the designed c.m. energy and luminosity for the CERN LHC, it is not possible to distinguish between the two Higgs boson production processes as, for a given integrated luminosity, they lead to the same number of events containing a rapidity gap. {copyright} {ital 1996 The American Physical Society.}

Constraints on singlet right-handed neutrinos coming from the Z0 width.

We study the constraints on masses and mixing angles imposed by the measured Z 0 invisible width, in a model in which a singlet right-handed neutrino mixes with all the standard model neutrinos

Radiative Omega(-)->Xi(-)gamma decay and physics beyond the standard model

We investigate the impact of new physics beyond the Standard Model to the

QCD sum rule approach to the s-->d gamma contribution to the Omega ---> Xi - gamma radiative decay.

s rightarrow d gamma

THE PIERRE AUGER COSMIC RAY OBSERVATORY

process, which is responsible for the short-distance contribution to the radiative decay

Radiative {Omega}{sup {minus}}{r_arrow}{Xi}{sup {minus}}{gamma} decay and physics beyond the standard model

Otogamma

QCD sum rule approach to the {ital s}{r_arrow}{ital d}{gamma} contribution to the {Omega}{sup {minus}}{r_arrow}{Xi}{sup {minus}}{gamma} radiative decay

. We study three representative extensions of the Standard Model, namely a one-family technicolor model, a two Higgs doublet model and a model containing scalar leptoquarks. When constraints arising from the observed

Can omega- ---> xi- gamma be sensitive to new physics beyond the standard model?

b to s gamma

Comment on the τ decay puzzle

transition and the upper limit on

Comment on

D^0 - bar{D}^0