Stokes vector of photon in the decays B0→ρ0γ and B0→K*γ

被引：0
|
作者：
Sehgal, LM [1 ]
van Leusen, J [1 ]
机构：
[1] Rhein Westfal TH Aachen, Inst Theoret Phys, D-52056 Aachen, Germany
来源：
PHYSICS LETTERS B | 2004年 / 591卷 / 3-4期
关键词：
D O I：
10.1016/j.physletb.2004.04.039
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We consider a model for the decay (B-0) over bar --> rho(0)gamma in which the short-distance amplitude determined by the Hamiltonian describing b --> dgamma is combined with a typical long-distance contribution (B-0) over bar --> D+D- --> rho(0)gamma. The latter possesses a significant dynamical phase which induces a CP-violating asymmetry A(CP), as well as an important modification of the Stokes vector of the photon. The components S-1 and S-3 of the Stokes vector (S) over right arrow = (S-1, S-2, S-3) can be measured in the decay (B-0) over bar --> rho(0)gamma*--> pi(+)pi(-)e(+)e(-) where they produce a characteristic effect in the angular distribution dGamma/dphi, phi being the angle between the pi(+)pi(-) and e(+)e(-) planes. A similar analysis is carried out for the decays (B-0) over bar --> (K*) over bar gamma and (B-0) over bar --> (K*) over bar gamma* --> pi(+)K(-)e(+)e(-). (C) 2004 Elsevier B.V. All rights reserved.
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页码：235 / 241
页数：7
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