Role of f0(980) and a0(980) in the B- → π-K+K- and B- → π-K0(K)over-bar0 reactions

被引:6
|
作者
Abreu, Luciano M. [1 ,2 ,3 ]
Ikeno, Natsumi [4 ]
Oset, Eulogio [2 ,3 ]
机构
[1] Univ Fed Bahia, Inst Fis, Campus Univ Ondina, Salvador, BA, Brazil
[2] Ctr Mixto Univ Valencia, Inst Invest Paterna, Dept Fis Teor, CSIC, Valencia 46071, Spain
[3] Ctr Mixto Univ Valencia, Inst Invest Paterna, IFIC, CSIC, Valencia 46071, Spain
[4] Tottori Univ, Dept Agr Life & Environm Sci, Tottori 6808551, Japan
关键词
F(0)(500); DECAYS;
D O I
10.1103/PhysRevD.108.016007
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this work we study the role of the f(0)(980) and a(0)(980) resonances in the low K+K- and K-0(K) over bar (0) invariant-mass region of the B- -> pi-K+K- and B- -> pi K--(0)(K) over bar (0) reactions. The amplitudes are calculated by using the chiral unitary SU(3) formalism, in which these two resonances are dynamically generated from the unitary pseudoscalar-pseudoscalar coupled-channel approach. The amplitudes are then used as input in the evaluation of the mass distributions with respect to the K+K- and K-0(K) over bar (0) invariant masses, where the contributions coming from the I = 0 and I = 1 components are explicitly assessed. Furthermore, the contribution of the K*(892)K-0(-) production and its influence on the pi K--(+) and K+K- systems are also evaluated, showing that there is no significant strength for small K+K- invariant mass. Finally, the final distributions of M-inv(2) ((KK -/+)-K-+/-) for the B--/+ -> pi(KK -/+)-K--/+-K-+/- reactions are estimated and compared with the LHCb data. Our results indicate that the I = 0 component tied to the f(0)(980) excitation generates the dominant contribution in the range of low K+K- invariant mass.
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页数:9
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