Photon polarization in B→Xγ in the standard model -: art. no. 011504

被引：84

作者：

Grinstein, B ^{[1
]}

Grossman, Y

Ligeti, Z

Pirjol, D

机构：

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

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

[3] Boston Univ, Dept Phys, Boston, MA 02215 USA

[4] Harvard Univ, Jefferson Lab Phys, Cambridge, MA 02138 USA

[5] Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[6] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW D | 2005年 / 71卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.71.011504

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The standard model prediction for the (B) over bar (0)-->X(s,d)gamma decay amplitude with a right-handed photon is believed to be tiny, suppressed by m(s,d)/m(b), compared to the amplitude with a left-handed photon. We show that this suppression is fictitious: In inclusive decays, the ratio of these two amplitudes is only suppressed by g(s)/(4pi), and in exclusive decays by Lambda(QCD)/m(b). The suppression is not stronger in (B) over bar (0)-->X(d)gamma decays than it is in (B) over bar (0)-->X(s)gamma. We estimate that the time dependent CP asymmetries in B-->K(*)gamma, rhogamma, K(S)pi(0)gamma, and pi(+)pi(-)gamma are of order 0.1 and that they have significant uncertainties.

引用

页码：011504 / 1

页数：5

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