Observation of Ξ (1620)0 and Evidence for Ξ (1690)0 in Ξc+ → Ξ-π+π+ Decays

Belle Collaboration

doi:10.1103/PhysRevLett.122.072501

Observation of Ξ (1620)0 and Evidence for Ξ (1690)0 in Ξc+ → Ξ-π+π+ Decays

Belle Collaboration

Department of Physics

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46 Citations (Scopus)

Abstract

We report the first observation of the double strange baryon Ξ(1620)0 in its decay to Ξ-π+ via Ξc+→Ξ-π+π+ decays based on a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The mass and width are measured to be 1610.4±6.0(stat)-4.2+6.1 (syst) MeV/c2 and 59.9±4.8(stat)-7.1+2.8(syst) MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)0 with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=-2.

Original language	English
Article number	072501
Journal	Physical review letters
Volume	122
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.122.072501
Publication status	Published - 2019 Feb 21

Bibliographical note

Publisher Copyright:
© 2019 authors. Published by the American Physical Society.

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.122.072501

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@article{23e86bf20534419390f815092fb35809,

title = "Observation of Ξ (1620)0 and Evidence for Ξ (1690)0 in Ξc+ → Ξ-π+π+ Decays",

abstract = "We report the first observation of the double strange baryon Ξ(1620)0 in its decay to Ξ-π+ via Ξc+→Ξ-π+π+ decays based on a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The mass and width are measured to be 1610.4±6.0(stat)-4.2+6.1 (syst) MeV/c2 and 59.9±4.8(stat)-7.1+2.8(syst) MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)0 with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=-2.",

author = "\{Belle Collaboration\} and M. Sumihama and I. Adachi and Ahn, \{J. K.\} and H. Aihara and \{Al Said\}, S. and Asner, \{D. M.\} and H. Atmacan and T. Aushev and R. Ayad and V. Babu and I. Badhrees and S. Bahinipati and Bakich, \{A. M.\} and V. Bansal and C. Bele{\~n}o and M. Berger and V. Bhardwaj and B. Bhuyan and T. Bilka and J. Biswal and G. Bonvicini and A. Bozek and M. Bra{\v c}ko and Browder, \{T. E.\} and D. {\v C}ervenkov and V. Chekelian and A. Chen and Cheon, \{B. G.\} and K. Chilikin and K. Cho and Choi, \{S. K.\} and Y. Choi and S. Choudhury and D. Cinabro and S. Cunliffe and T. Czank and N. Dash and \{Di Carlo\}, S. and Z. Dole{\v Z}al and Dong, \{T. V.\} and Z. Dr{\'a}sal and S. Eidelman and D. Epifanov and Fast, \{J. E.\} and Fulsom, \{B. G.\} and R. Garg and V. Gaur and N. Gabyshev and A. Garmash and E. Won",

note = "Publisher Copyright: {\textcopyright} 2019 authors. Published by the American Physical Society.",

year = "2019",

month = feb,

day = "21",

doi = "10.1103/PhysRevLett.122.072501",

language = "English",

volume = "122",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "7",

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TY - JOUR

T1 - Observation of Ξ (1620)0 and Evidence for Ξ (1690)0 in Ξc+ → Ξ-π+π+ Decays

AU - Belle Collaboration

AU - Sumihama, M.

AU - Adachi, I.

AU - Ahn, J. K.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Badhrees, I.

AU - Bahinipati, S.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Beleño, C.

AU - Berger, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Biswal, J.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, K.

AU - Choi, S. K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Czank, T.

AU - Dash, N.

AU - Di Carlo, S.

AU - DoleŽal, Z.

AU - Dong, T. V.

AU - Drásal, Z.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Fast, J. E.

AU - Fulsom, B. G.

AU - Garg, R.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Won, E.

PY - 2019/2/21

Y1 - 2019/2/21

N2 - We report the first observation of the double strange baryon Ξ(1620)0 in its decay to Ξ-π+ via Ξc+→Ξ-π+π+ decays based on a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The mass and width are measured to be 1610.4±6.0(stat)-4.2+6.1 (syst) MeV/c2 and 59.9±4.8(stat)-7.1+2.8(syst) MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)0 with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=-2.

AB - We report the first observation of the double strange baryon Ξ(1620)0 in its decay to Ξ-π+ via Ξc+→Ξ-π+π+ decays based on a 980 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The mass and width are measured to be 1610.4±6.0(stat)-4.2+6.1 (syst) MeV/c2 and 59.9±4.8(stat)-7.1+2.8(syst) MeV, respectively. We obtain 4.0σ evidence of the Ξ(1690)0 with the same data sample. These results shed light on the structure of hyperon resonances with strangeness S=-2.

UR - https://www.scopus.com/pages/publications/85062449899

U2 - 10.1103/PhysRevLett.122.072501

DO - 10.1103/PhysRevLett.122.072501

M3 - Article

C2 - 30848612

AN - SCOPUS:85062449899

SN - 0031-9007

VL - 122

JO - Physical review letters

JF - Physical review letters

IS - 7

M1 - 072501

ER -

Observation of Ξ (1620)0 and Evidence for Ξ (1690)0 in Ξc+ → Ξ-π+π+ Decays

Abstract

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