Photon polarization in radiative B decays -: art. no. 054008

被引：60

作者：

Gronau, M ^{[1
]}

Pirjol, D

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW D | 2002年 / 66卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.66.054008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study decay distributions in B-->Kpipigamma, combining contributions from several overlapping resonances in a Kpipi mass range near 1400 MeV, 1(+) K-1(1400), 2(+) K-2*(1430) and 1(-) K*(1410). A method is proposed for using these distributions to determine a photon polarization parameter in the effective radiative weak Hamiltonian. This parameter is measured through an up-down asymmetry of the photon direction relative to the Kpipi decay plane in the K-res frame. We calculate a dominant up-down asymmetry of 0.33+/-0.05 from the K-1(1400) resonance, which can be measured with about 10(8) B (B) over bar pairs, thus providing a new test for the standard model and a probe for some of its extensions.

引用

页数：13

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