Roberto R. Mendel

Large CP asymmetries in B+/---> eta c( chi c0) pi +/- from the eta c( chi c0) width.

We study {ital CP} asymmetries in {ital B}{sup {plus_minus}}{r_arrow}{ital h}{pi}{sup {plus_minus}} decays, where the hadronic states {ital h}={rho}{rho}, {ital K{bar K}}{pi}, {pi}{sup +}{pi}{sup {minus}}{ital K}{sup +}{ital K}{sup {minus}}, etc., and {ital h}={pi}{sup +}{pi}{sup {minus}}, {ital K}{sup +}{ital K}{sup {minus}}, 2({pi}{sup +}{pi}{sup {minus}}), etc., are taken on the resonances {eta}{sub {ital c}} and {chi}{sub {ital c}0}, respectively. The relatively large {eta}{sub {ital c}} and {chi}{sub {ital c}0} decay widths, of about 10--15 MeV, provide the necessary absorptive phase in the interference between the resonance (going through {ital b}{r_arrow}{ital c{bar c}d}) and the background (through {ital b}{r_arrow}{ital u{bar u}d}) contributions to the amplitude. Large asymmetries of order 10% or more are likely in some modes.We study CP asymmetries in

Large tree-level {ital CP} violation in {ital e}{sup +}{ital e}{sup {minus}}{r_arrow}{ital t{bar t}H}{sup 0} in the two-Higgs-doublet model

B^{\pm}\to h\pi^{\pm}

Isgur-Wise function in a relativistic model for a qQ-bar system.

decays, where the hadronic states

Hadronic contribution to the photon vacuum polarization: a theoretical estimate

h=\rho\rho, K\Kbar\pi

Decays eta c--> gamma gamma and eta b--> gamma gamma : A test for potential models.

,

Decay constants of pseudoscalar Qq mesons. Relativistic and short-distance QCD effects

\pi^+\pi^-K^+K^-

Dynamical generation of fermion masses and quark-antiquark and lepton-antilepton resonances in the TeV region

, etc., and

The Decay

h=\pi^+\pi^-, K^+K^-, 2(\pi^+\pi^-)

\eta_c \rightarrow \gamma \gamma

, etc., are taken on the resonances

: A Test for Potential Models

\eta_c