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5 papers · 1 filter
Calculation of the D and B Meson Lifetimes
Victor Chernyak
Using the expansions of the heavy meson decay widths in the heavy quark mass and QCD sum rules for estimates of corresponding matrix elements,\, we calculate the deca…
Radiative Corrections to P-Levels in the Two-Body QED Problem
M. I. Eides, I. B. Khriplovich, A. I. Milstein
The physical origin of the radiative corrections to -levels in the two-body QED problem is elucidated. Then we demonstrate that the next order, , corrections to tho…
Quark contribution to the reggeon-reggeon-gluon vertex in QCD
V. S. Fadin, R. Fiore, A. Quartarolo
The quark loop contribution to the reggeon-reggeon-gluon vertex is calculated in QCD, where the reggeon is the reggeized gluon. Compared with the vertex in the Born approximation,…
Threshold Effects in Two--Photon Decays of Higgs Particles
Kirill Melnikov, Michael Spira, Oleg Yakovlev
The couplings of Higgs particles to two photons are analyzed in the threshold region, where the Higgs mass is about twice the loop--particle mass leading to possible bound state fo…
Top quark polarization as a probe of threshold dynamics
V. S. Fadin, V. A. Khoze, M. I. Kotsky
We study the spin properties of top quarks produced in collisions of polarized photons in the threshold region. For a relatively heavy top quark the influence of non-perturbative e…