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.

引用

页码：235 / 241

页数：7

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