Reevaluating uncertainties in B Xs -y decay

被引：0
作者：
Gunawardana, Ayesh [1 ]
Paz, Gil [1 ,2 ,3 ]
机构：
[1] Wayne State Univ, Dept Phys & Astron, 666 W Hancock St, Detroit, MI 48201 USA
[2] Technion Israel Inst Technol, Phys Dept, IL-3200003 Haifa, Israel
[3] Weizmann Inst Sci, Dept Particle Phys & Astrophys, IL-7610001 Rehovot, Israel
来源：
JOURNAL OF HIGH ENERGY PHYSICS | 2019年 / 11期
关键词：
CP violation; Heavy Quark Physics; Nonperturbative Effects; QUARK MASS; GAMMA;
D O I：
10.1007/JHEP11(2019)141
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
The rare decay B Xs7 is an important probe of physics beyond the standard model. The largest uncertainty on the total rate and the CP asymmetry arises from resolved photon contributions. These appear first at order 1/mb and are related to operators other than Q77 in the effective weak Hamiltonian. One of the three leading contributions, Q7 Q77, is described by a non-local function whose moments are related to HQET parameters. We use recent progress in our knowledge of these parameters to reevaluate the resolved photon contribution to B Xs7 total rate and CP asymmetry.
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页数：21
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