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Observation of Xi(1620)(0) and Evidence for Xi(1690)(0) in Xi(+)(c) -˃ Xi(-) pi(+) pi(+) Decays

Title
Observation of Xi(1620)(0) and Evidence for Xi(1690)(0) in Xi(+)(c) -˃ Xi(-) pi(+) pi(+) Decays
Author
천병구
Keywords
QUARK-MODEL; BARYONS
Issue Date
2019-02
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v. 122, NO 7, no. 072501
Abstract
We report the first observation of the double strange baryon Xi(1620)(0) in its decay to Xi(-) pi(+) via Xi(+)(c) -˃ Xi(-)pi(+)pi(+) decays based on a 980 fb(-1) data sample collected with the Belle detector at the KEKB asymmetricenergy e(+)e(-) collider. The mass and width are measured to be 1610.4 +/- 6.0(stat)(-4.2)(+6.1) (syst) MeV/c(2) and 59.9 +/- 4.8(stat)(-7.1)(+2.8)(syst) MeV, respectively. We obtain 4.0 sigma evidence of the Xi(1690)(0) with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S = -2.
URI
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.072501https://repository.hanyang.ac.kr/handle/20.500.11754/134654
ISSN
0031-9007; 1079-7114
DOI
10.1103/PhysRevLett.122.072501
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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