Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-03-30
Phys.Lett.B666:162-165,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 2 eps figures. References added. A corrected expression for epsilon_K, following the paper from Buras and Guadagnoli
Scientific paper
10.1016/j.physletb.2008.07.015
Using the hadronic matrix elements from the lattice, B_K and xi_s, involving only the 4-quark operators for Delta flavor (F) = 2 Hamiltonian relevant for K, B_d and B_s mixing, along with V_cb, we deduce a non-trivial constraint on the SM, sin (2 beta) = 0.87+-0.09. This deviates from direct experimental measurements via the tree process, b -> c c s as well as the one via the penguin-loop b -> s decays by around 2.1 and 2.7 sigma respectively. If these deviations are confirmed they would imply the presence of new physics rather pervasively in both B_d mixing (i.e. very likely in b -> d) as well as in b -> s transitions requiring a beyond the SM CP-odd phase. Consequently, improvements in the relevant lattice calculations should be given a high priority.
Lunghi Enrico
Soni Amarjit
No associations
LandOfFree
Possible Indications of New Physics in Bd-mixing and in sin(2 beta) Determinations 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 Possible Indications of New Physics in Bd-mixing and in sin(2 beta) Determinations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Possible Indications of New Physics in Bd-mixing and in sin(2 beta) Determinations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-512214