Journal article
Observation of the doubly charmed baryon Ξcc++.
- Abstract:
- A highly significant structure is observed in the Λ+cK−π+π+ mass spectrum, where the Λ+c baryon is reconstructed in the decay mode pK−π+. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξ++cc. The difference between the masses of the Ξ++cc and Λ+c states is measured to be 1334.94±0.72(stat.)±0.27(syst.) MeV/c^2, and the Ξ++cc mass is then determined to be 3621.40±0.72(stat.)±0.27(syst.)±0.14(Λ+c) MeV/c^2, where the last uncertainty is due to the limited knowledge of the Λ+c mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb^−1, and confirmed in an additional sample of data collected at 8 TeV.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 333.7KB, Terms of use)
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- Publisher copy:
- 10.1103/physrevlett.119.112001
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 119
- Issue:
- 11
- Pages:
- 112001
- Publication date:
- 2017-09-01
- Acceptance date:
- 2017-08-02
- DOI:
- EISSN:
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1079-7114
- ISSN:
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0031-9007
- Pmid:
-
28949228
- Language:
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English
- Keywords:
- Pubs id:
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pubs:708250
- UUID:
-
uuid:8cca1044-e487-4bd7-9ade-7c5ff917f1af
- Local pid:
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pubs:708250
- Source identifiers:
-
708250
- Deposit date:
-
2017-11-05
Terms of use
- Copyright holder:
- CERN, for the LHCb Collaboratio
- Copyright date:
- 2017
- Notes:
- © 2017 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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