Study of the Ds+ → a0(980) ρ and a0(980)ω decays

被引：0
作者：
Yu, Yao [1 ]
Hsiao, Yu-Kuo [2 ]
Ke, Bai-Cian [3 ]
机构：
[1] Chongqing Univ Posts & Telecommun, Chongqing 400065, Peoples R China
[2] Shanxi Normal Univ, Sch Phys & Informat Engn, Linfen 041004, Shanxi, Peoples R China
[3] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Henan, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL C | 2021年 / 81卷 / 12期
关键词：
LOOP; MESONS;
D O I：
10.1140/epjc/s10052-021-09895-y
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 D-s(+) -> rho(0(+))a(0)(+(0)) , D-s(+) -> omega a(0)(+), and the resonant D-s(+) -> rho a(0), a(0) -> eta pi(KK) decays. In the final state interaction, where D-s(+) -> (eta(('))pi +, K+ (K) over bar (0)) are followedby the (eta(('))pi(+), K+(K) over bar (0)) to rho(0(+))a(0)(+(0)) rescatterings, we predict B(D-s(+) -> rho(0(+)) a(0)(+(0))) = (3.0 +/- 0.3 +/- 1.0)x10(-3). Due to the cancellation of the rescattering effects and the suppressed short-distance W annihilation contribution, we expect that B(D-s(+) -> omega a(0)(+)) similar or equal to B(D-s(+) -> pi (+)pi(0)) < 3.4 x 10(-4). In our calculation, B(D-s(+) -> rho(0)(a(0)(+) ->)eta pi(+)) = (1.6(-0.3)(+0.2) +/- 0.6) x 10(-3) agrees with the data, whereas B(D-s(+) -> rho(+) (a(0)(0) ->) K+ K-) is 10 times smaller than the observation, which requires a careful examination.
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页数：6
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