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Sakai, Shuntaro
Role of the triangle mechanism in the Lambda(b) -> Lambda(c)pi(-) f(0)(980) reaction
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordCOUPLED-CHANNEL ANALYSIS TAU-DECAYS PHYSICS VECTOR MESON
AbstractWe 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.
2020
ISSN2470-0010
Volume101Issue:7Pages:74041
Cooperation Status国内
Subject AreaAstronomy & Astrophysics ; Physics
MOST Discipline CatalogueAstronomy & Astrophysics ; Physics, Particles & Fields
DOI10.1103/PhysRevD.101.074041
Indexed BySCIE
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/27080
CollectionSCI期刊论文
AffiliationChinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhong Guan Cun East St 55, Beijing 100190, Peoples R China
Recommended Citation
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.
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