ar X iv : h ep - p h / 96 12 38 7 v 1 1 7 D ec 1 99 6 The B → X s γγ rare decay

ar X iv : h ep - p h / 96 12 24 7 v 1 4 D ec 1 99 6 ITEP - TH - 55 / 96 TESTS OF CPT

A few remarks concerning theoretical suggestions and experimental tests of CPT during 1980's-1990's. Is it worth to search for the particle-antiparticle mass differences in sectors other than K 0 ¯ K 0 ?

ar X iv : h ep - p h / 99 05 50 4 v 1 2 7 M ay 1 99 9 On the Long Distance Contribution to the B s → γγ Decay in the Effective Lagrangian Approach

We re-estimate the decay branching ratio of Bs → 2γ through D + s D − s and D∗+ s D ∗− s intermediate states, in the effective Lagrangian approach. We find that the branching ratio does not exceed a few times 10−7, contrary to the result recently claimed in the literature. PACS numbers: 13.25.Hw Typeset using REVTEX

ar X iv : h ep - p h / 96 05 31 0 v 1 1 5 M ay 1 99 6 O ( α 2 G F m 2 t ) Contributions to H → γγ

The rare decay H → γγ is a promising detection channel for an intermediate mass Higgs boson. We compute its two-loop O(αGFm 2 t ) correction in the standard model and find that it is much smaller than the corresponding QCD correction. The analogous correction to the amplitude for gg → H is recovered as a special case. The generalization of our result to other models is also briefly indicated.

ar X iv : h ep - p h / 97 12 41 5 v 1 1 7 D ec 1 99 7 The ALLM parameterization of σ tot ( γ ∗ p ) an update

ar X iv : h ep - p h / 99 12 39 3 v 1 1 7 D ec 1 99 9 Final - state interaction phase difference in J / ψ → ρη and ωη decays

Final-state interaction phase difference in J/ψ → ρη and ωη decays Abstract It is shown that the study of the ω − ρ 0 interference pattern in the J/ψ → (ρ 0 + ω)η → π + π − η decay provides the evidence for the large (nearly 90 •) relative phase between the one-photon and the three-gluon decay amplitudes.