Role of the triangle mechanism in the Lambda(b) -> Lambda(c)pi(-) f(0)(980) reaction
文献类型：期刊论文
| 作者 | Sakai, Shuntaro |
| 刊名 | PHYSICAL REVIEW D
 |
| 出版日期 | 2020 |
| 卷号 | 101期号:7页码:74041 |
| 关键词 | COUPLED-CHANNEL ANALYSIS TAU-DECAYS PHYSICS VECTOR MESON |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/PhysRevD.101.074041 |
| 英文摘要 | We investigate the Lambda(b) -> Lambda(c)pi-f(0)(980) production with a f(0)(980) decay into pi(+)pi(-) via the K*(K-K+)-K-0 and K*K--(0)(k) over bar (0) triangle loops. These loops produce a peak around 1.42 GeV in the pi(-)f(0)(980) invariant mass distribution, which is the same mechanism as the one considered to explain the a(1)(1420) peak. In the pi(+)pi(-) distribution obtained by fixing the pi(-)f(0)(980) invariant mass to some values, a clear peak of pi(-)f(0)(980) is seen, and the pi(-)f(0)(980) distribution has a peak around M pi-f0 = 1.42 GeV, which is caused by the triangle mechanism of the K*(K) over barK loop. The branching ratio of Lambda(b) -> Lambda(c)pi(-)f(0)(980) with f(0)(980) -> pi(+)pi(-) by the triangle mechanism, obtained by integrating the pi(-)f(0)(980) distribution from 1 to 1.6 GeV, is estimated to be the order 10(-4). Future measurements of the Lambda(b) -> Lambda(c)pi(-)f(0)(980)branching ratio and the pi(-)f(0)(980) invariant mass distribution predicted in this work would give further clues to clarify the nature of the a(1)(1420) peak. |
| 学科主题 | Astronomy & Astrophysics ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/27080]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 作者单位 | Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhong Guan Cun East St 55, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sakai, Shuntaro. Role of the triangle mechanism in the Lambda(b) -> Lambda(c)pi(-) f(0)(980) reaction[J]. PHYSICAL REVIEW D,2020,101(7):74041. |
| APA | Sakai, Shuntaro.(2020).Role of the triangle mechanism in the Lambda(b) -> Lambda(c)pi(-) f(0)(980) reaction.PHYSICAL REVIEW D,101(7),74041. |
| MLA | Sakai, Shuntaro."Role of the triangle mechanism in the Lambda(b) -> Lambda(c)pi(-) f(0)(980) reaction".PHYSICAL REVIEW D 101.7(2020):74041. |
入库方式： OAI收割
来源：理论物理研究所
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