The D coefficient in neutron beta decay in effective field theory
The D coefficient in neutron beta decay in effective field theory
复制标题
有效场论中中子β衰变的D系数
DOI:
10.1016/j.physletb.2009.04.088
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发表时间:
2009
影响因子:
4.4
通讯作者:
Ando S
中科院分区:
文献类型:
--
作者:
Ando S
In this Letter we explore the time-reversal-odd triple-correlation coefficient in neutron beta decay, the so-called “D coefficient”, using heavy-baryon effective field theory with photon degrees of freedom. We find that this framework allows us to reproduce the known results for the contribution which comes from final-state interactions, and also to discuss higher-order corrections. In particular we are able to show that in the heavy-baryon limit all electromagnetic contributions vanish. By calculating the leading correction to the known result, we give a final expression which is accurate to better than 1%. Hence we extend downwards the range over which the D coefficient could be used to explore time-reversal violation from new physics.
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P. Herczeg
DOI:
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1957
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