Helicity amplitudes in the (B)over-bar → D*(ν)over-barττ decay with V-A breaking in the quark sector

被引：0
|
作者：
Dai, L. R. [1 ,2 ]
Oset, E. [3 ,4 ]
机构：
[1] Huzhou Univ, Sch Sci, Huzhou 313000, Zhejiang, Peoples R China
[2] Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China
[3] Univ Valencia, Ctr Mixto, CSIC, Dept Fis Teor,Inst Invest Paterna, Aptdo 22085, Valencia 46071, Spain
[4] Univ Valencia, Ctr Mixto, CSIC, Inst Invest Paterna,IFIC, Aptdo 22085, Valencia 46071, Spain
来源：
EUROPEAN PHYSICAL JOURNAL A | 2020年 / 56卷 / 05期
基金：
欧盟地平线“2020”; 中国国家自然科学基金;
关键词：
POLARIZATION;
D O I：
10.1140/epja/s10050-020-00160-6
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
In view of the recent measurement of the F-D*(L) magnitude in the (B) over bar -> D*(nu) over bar (tau)tau reaction we evaluate this magnitude within the standard model and for a family of models with the gamma(mu) - alpha gamma(mu)gamma(5) current structure for the quarks for different values of a. At the same time we evaluate also the transverse contributions, M = -1, M = +1, and find that the difference between the M = -1 and M = +1 contributions is far more sensitive to changes in a than the longitudinal component. These findings should be looked as an incentive to measure the transverse helicities which are bound to be a far more sensitive magnitude to possible new physics than F-D*(L).
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页数：8
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