Charm quark mass dependence of the electromagnetic dipole operator contribution to (B)over-bar →Xsγ at O(αs2)

被引：37
作者：
Asatrian, H. M.
Ewerth, T.
Gabrielyan, H.
Greub, C.
机构：
[1] Univ Bern, Inst Theoret Phys, CH-3012 Bern, Switzerland
[2] Yerevan Phys Inst, Yerevan 375036, Armenia
来源：
PHYSICS LETTERS B | 2007年 / 647卷 / 2-3期
关键词：
D O I：
10.1016/j.physletb.2007.02.027
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We extend existing calculations of the electromagnetic dipole operator contribution to the total decay rate and the photon energy spectrum of the decay (B) over bar -> X-s gamma at 0 (alpha(2)(s)) by working out the exact dependence on the charm quark mass. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：173 / 178
页数：6
相关论文
共 32 条
[1]  
Anastasiou C, 2004, J HIGH ENERGY PHYS
[2]  
ANDERSEN JR, HEPPH0609250
[3]  
[Anonymous], HEPEX0603003
[4]   NNLL QCD contribution of the electromagnetic dipole operator to Γ ((B)over-bar → Xsγ) [J].
Asatrian, H. M. ;
Hovhannisyan, A. ;
Poghosyan, V. ;
Ewerth, T. ;
Greub, C. ;
Hurth, T. .
NUCLEAR PHYSICS B, 2006, 749 (1-3) :325-337
[5]   Reduction of charm quark mass scheme dependence in (B)over-bar-→Xsγ at the NNLL level [J].
Asatrian, HM ;
Greub, C ;
Hovhannisyan, A ;
Hurth, T ;
Poghosyan, V .
PHYSICS LETTERS B, 2005, 619 (3-4) :322-332
[6]  
ASATRIAN HM, HEPPH0607316
[7]  
Aubert B, 2005, PHYS REV D, V72, DOI [10.1103/PhysRevD.72.032004, 10.1103/PhysRevD.72.052004]
[8]  
AUBERT B, HEPEX0607071 BABAR C
[9]   Toward a NNLO calculation of the (B)over-bar → Xsγ decay rate with a cut on photon energy:: I.: Two-loop result for the soft function [J].
Becher, T ;
Neubert, M .
PHYSICS LETTERS B, 2006, 633 (06) :739-747
[10]  
BECHER T, HEPPH0610067
1234