Are operators describing b→sγ?

DONG Fan-Long; WANG Wen-Yu; XIONG Zhao-Hua

doi:10.1088/1674-1137/35/1/002

Chinese Physics C> 2011, Vol. 35> Issue(1) : 6-10 DOI: 10.1088/1674-1137/35/1/002

Are operators describing b→sγ?

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Abstract：
The operators of b→sγ, b→sl⁺l^- are usually regarded as being sufficient to describe b→sγγ, b→sl⁺l^-γ with the statement that contributions from diagrams without an effective vertex b→sγ to processes b→sγγ and b→sl⁺l^-γ are negligible. In this work we present a comprehensive analysis of the transition b→sγγ and find that 1) Effects due to off-shell quarks in vertex b→sγ on b→sγγ are large; 2) Contributions from diagrams without an effective vertex b→sγ to b→sγγ are not negligible compared with others; 3) These effects cancel each other out exactly, so the operators of b→sγ can safely be used to describe b→sγγ.

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DONG Fan-Long, WANG Wen-Yu and XIONG Zhao-Hua. Are operators describing b→sγ?[J]. Chinese Physics C, 2011, 35(1): 6-10. doi: 10.1088/1674-1137/35/1/002

DONG Fan-Long, WANG Wen-Yu and XIONG Zhao-Hua. Are operators describing b→sγ?[J]. Chinese Physics C, 2011, 35(1): 6-10. doi: 10.1088/1674-1137/35/1/002 shu

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Received: 2010-03-09
Revised: 2010-03-22

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Are operators describing b→sγ?

Received Date: 2010-03-09

Accepted Date: 2010-03-22

Available Online: 2011-01-05

Abstract: The operators of b→sγ, b→sl⁺l^- are usually regarded as being sufficient to describe b→sγγ, b→sl⁺l^-γ with the statement that contributions from diagrams without an effective vertex b→sγ to processes b→sγγ and b→sl⁺l^-γ are negligible. In this work we present a comprehensive analysis of the transition b→sγγ and find that 1) Effects due to off-shell quarks in vertex b→sγ on b→sγγ are large; 2) Contributions from diagrams without an effective vertex b→sγ to b→sγγ are not negligible compared with others; 3) These effects cancel each other out exactly, so the operators of b→sγ can safely be used to describe b→sγγ.

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Are operators describing b→sγ?

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