Short-distance QCD corrections to K 0 K ¯ 0 $$ {K}^0{\overline{K}}^0 $$ mixing at next-to-leading order in Left-Right models

Nonleading charmed quark mass corrections to K 0 − ̄ K 0 mixing in the standard model

The Rare Decay K + → π + νν̄ at the Next - to - Next - to - Leading Order in QCD

We calculate the complete next-to-next-to-leading order QCD correction of the charm quark contribution to the branching ratio for the rare decay K + → π + ν ¯ ν in the standard model. The inclusion of these O(αs) contributions leads to a significant reduction of the theoretical uncertainty from ±10.1% down to ±2.4% in the relevant parameter Pc, implying the left over scale uncertainties in B(K ...

Studies of Three-Body B^+→D ̅^* 〖(2007)〗^0 K^+ K ̅^0 and B^0→D^* 〖(2010)〗^- K^+ K ̅^0 Decays

We analyze three-body decays of and . Under the factorization approach, there are tree level diagrams for these decay modes and the transition matrix element of decay is factorized into a form factor multiplied by decay constant and form factor multiplied into weak vertices form factor. The transition matrix element of decay is also factorized into a form factor multiplied into weak vertic...

Next-to-leading-order temperature corrections to correlators in QCD.

Corrections of order T 4 to vector and axial current correlators in QCD at a finite temperature T < Tc are obtained using dispersion relations for the amplitudes of deep inelastic scattering on pions. Their relation with the operator product expansion is presented. An interpretation of the results in terms of T -dependent meson masses is given: masses of ρ and a1 start to move with temperature ...

0 Next - to - leading order QCD corrections to top quark spin correlations at hadron colliders : the reactions qq̄ → tt̄ ( g )

Next-to-leading order QCD corrections to top quark spin correlations at hadron colliders: the reactions q ¯ q → t ¯ t(g) Abstract: Future hadron collider experiments are expected to record large to huge samples of t ¯ t events. The analysis of these data with respect to t ¯ t spin-spin correlations requires precise predictions of the production of these quark pairs in a general spin configurati...