Tau decay into τt and a1(1260), b1(1235), and two K1(1270)

被引:4
|
作者
Dai, L. R. [1 ,2 ,3 ,4 ]
Roca, L. [5 ]
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, CSIC, Ctr Mixto, Inst Invest Paterna,Dept Fis Teor, Valencia 46071, Spain
[4] Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,IFIC, Valencia 46071, Spain
[5] Univ Murcia, Dept Fis, Murcia 30100, Spain
来源
EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 07期
基金
中国国家自然科学基金; 欧盟地平线“2020”;
关键词
SPECTRAL FUNCTIONS; MESON RESONANCES; CHIRAL THEORY; PHYSICS; MODEL; A(1); A1;
D O I
10.1140/epjc/s10052-020-8220-3
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
We study the tau -> nu(tau). A decay, with A an axialvector meson. We produce the a(1) (1260) and b(1) (1235) resonances in the Cabibbo favored mode and two K-1 (1270) states in the Cabibbo suppressed mode. We take advantage of previous chiral unitary approach results where these resonances appear dynamically from the vector and pseudoscalar meson interaction in s-wave. Actually two different poles were obtained associated to the K-1(1270) quantum numbers. We find that the unmeasured rates for b(1)(1235) production are similar to those of the a(1)(1260) and for the two K-1 states we suggest to separate the present information on the (K) over bar pi pi invariant masses into (K) over bar*pi and rho K modes, the channels to which these two resonances couple most strongly, predicting that thesemodes peak at different energies and have different widths. These measurements should shed light on the existence of these two K-1 states. In addition, we have gone one step further making a comparison with experimental results of three meson decay channels, letting the vector mesons of our approach decay into pseudoscalars, and we find an overall good agreement with experiment.
引用
收藏
页数:9
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