O ct 2 00 2 Study of the Flavour Changing Neutral Current Decay mode B → Kγγ
نویسندگان
چکیده
We study the neutral current flavour changing rare decay mode B → Kγγ within the framework of Standard Model, including the long distance contributions. It is found that these long distance contributions can be of the same order as the short distance contribution.
منابع مشابه
ar X iv : h ep - p h / 02 10 16 0 v 2 2 3 O ct 2 00 2 Study of the Flavour Changing Neutral Current Decay mode B → Kγγ
We study the neutral current flavour changing rare decay mode B → Kγγ within the framework of Standard Model, including the long distance contributions. It is found that these long distance contributions can be of the same order as the short distance contribution.
متن کاملar X iv : h ep - p h / 02 10 16 0 v 3 2 3 Fe b 20 05 Study of the Flavour Changing Neutral Current Decay mode B → Kγγ
We study the neutral current flavour changing rare decay mode B → Kγγ within the framework of Standard Model, including the long distance contributions. It is found that these long distance contributions can be larger than the short distance contribution. —————————————————————————————————— We have corrected a sign error in one of the terms contributing to the Irre-ducible (short-distance) contr...
متن کاملar X iv : h ep - p h / 02 11 25 5 v 1 1 6 N ov 2 00 2 B → X s + missing energy in models with large extra dimensions
We study the neutral current flavour changing rare decay mode B → Xs+ missing energy within the framework of theories with large extra spatial dimensions. The corresponding Standard Model signature is B → Xs + νν̄. But in theories with large extra dimensions, it is possible to have scalars and gravitons in the final state making it quite distinct from any other scenario where there are no gravit...
متن کاملar X iv : h ep - p h / 05 11 31 6 v 1 2 9 N ov 2 00 5 Phenomenological study of the double radiative decay B →
Using the operator product expansion (OPE) technique, we study the rare double radiative decay B → Kγγ in the Standard Model (SM) and beyond. We estimate the short-distance (SD) contribution to the decay amplitude in a region of the phase space which is around the point where all decay products have energy ∼ mb/3 in the rest frame of the B-meson. At lowest order in 1/mb, the B → Kγγ matrix elem...
متن کاملImplication of the HyperCP boson X 0 ( 214 MeV ) in the flavour changing neutral current processes
We analyze the inclusive b(c) → s(u)μ+μ− and the exclusive B(D+) → K(π+)μ+μ− flavour changing neutral current decays in the light of HyperCP boson X0 of mass 214 MeV recently observed in the hyperon decay Σ+ → p μ+μ−. Using the branching ratio data of the above inclusive and exclusive decays, we obtain constraints on g1 (h1) and g2 (h2), the scalar and pseudo-scalar coupling constants of the b−...
متن کامل