Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-08-07
Phys.Lett. B494 (2000) 229-236
Physics
High Energy Physics
High Energy Physics - Phenomenology
revtex, 8 pages
Scientific paper
10.1016/S0370-2693(00)01165-5
We analyse the corrections to factorization for the $B-\bar B$ mixing amplitude assuming that non-factorizable soft gluon exchanges can be described by the local gluon condensate. Within this approximation the $<\alpha_s GG>$-correction to the mixing amplitude can be expressed through the $B$-meson transition form factors at zero momentum transfer. The correction is negative independent of the particular values of the form factors. As a next step, we study these form factors making use of the relativistic dispersion approach based on the constituent quark picture. We obtain spectral representations for the form factors in terms of the $B$-meson soft wave function and the propagator of the color-octet $b\bar q$ system. The $B$-meson wave function has been determined previously from weak exclusive B decays, so the main uncertainty in our estimates comes from the unknown details of the propagator in the nonperturbative region. We obtain $\Delta B_{B_d}(m_b)=-0.06\pm 0.035 $ and $\Delta B_{B_s}(m_b)=-0.05\pm 0.03 $.
Melikhov Dmitri
Nikitin Nikolai
No associations
LandOfFree
Non-factorizable effects in the $B-\bar B$ mixing does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-factorizable effects in the $B-\bar B$ mixing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-factorizable effects in the $B-\bar B$ mixing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-507375