We examine the ΞQ-Ξ ′ Q mixing and heavy baryon masses in the heavy quark effective theory with the 1/mQ corrections. In the conventional baryon assignment, we obtain the mixing angle cos θ = 0.87 ± 0.03 in virtue of the GellMann−Okubo mass relation. On the other hand, if we adopt the new baryon assignment given by Falk, the allowed region of the Σc mass is upper from 2372MeV. The heavy quark e...

New developments in physics associated with parity-violating interactions are discussed in this PAVI 2002 workshop summary.

We study loop-induced parity violating asymmetries in the strong production of polarized top quark pairs at pp and pp̄ colliders. The electroweak O(α) corrections to the helicity amplitudes of qq̄ → tt̄ and gg → tt̄ are evaluated in a two Higgs doublet model (2HDM) and the minimal supersymmetric standard model (MSSM). While observables in top quark pair production receive little contribution from s...

We point out that interesting signals of the non-strongly interacting sector of the supersymmetric standard model arise from the production of charginos and neutralinos via vector boson fusion (VBF) at the Large Hadron Collider (LHC). In particular, if R-parity is violated, the hadronically quiet signals of charginos and neutralinos through direct production get considerably suppressed. We show...

Color neutral gluonic exchanges in high energy hadron scattering are naturally classified according to their C-parity. The C-even component is usually called the Pomeron. It gives the dominant contribution to vast majority of the measured cross-sections at high energies. The C-odd partner of the Pomeron is the odderon. In contrast to the Pomeron, the effects of the odderon are so weak that a co...

In R-parity conserving supersymmetric (SUSY) models, sleptons are produced in pairs at hadron colliders. We show that measurements of the longitudinal single-spin asymmetry at possible polarization upgrades of existing colliders allow for a direct extraction of the slepton mixing angle. A calculation of the transverse-momentum (qT ) spectrum shows the importance of resummed contributions at nex...