Journal article
χc1 and χc2 resonance parameters with the decays χc1,c2→J/ψμ+μ−
- Abstract:
- The decays χc1→J/ψμ+μ− and χc2→J/ψμ+μ− are observed and used to study the resonance parameters of the χc1 and χc2 mesons. The masses of these states are measured to be m(χc1)=3510.71±0.04(stat)±0.09(syst) MeV and m(χc2)=3556.10±0.06(stat)±0.11(syst) MeV, where the knowledge of the momentum scale for charged particles dominates the systematic uncertainty. The momentum-scale uncertainties largely cancel in the mass difference m(χc2)−m(χc1)=45.39±0.07(stat)±0.03(syst) MeV. The natural width of the χc2 meson is measured to be Γ(χc2)=2.10±0.20(stat)±0.02(syst) MeV. These results are in good agreement with and have comparable precision to the current world averages.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Version of record, pdf, 309.7KB, Terms of use)
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- Publisher copy:
- 10.1103/physrevlett.119.221801
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review Letters More from this journal
- Volume:
- 119
- Issue:
- 22
- Article number:
- 221801
- Publication date:
- 2017-11-28
- Acceptance date:
- 2017-10-23
- DOI:
- EISSN:
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1079-7114
- ISSN:
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0031-9007
- Pmid:
-
29286773
- Language:
-
English
- Keywords:
- Pubs id:
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pubs:730371
- UUID:
-
uuid:16ad4537-916e-4900-b850-e70647129845
- Local pid:
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pubs:730371
- Source identifiers:
-
730371
- Deposit date:
-
2018-02-23
Terms of use
- Copyright holder:
- CERN, for the LHCb Collaboration
- Copyright date:
- 2017
- Notes:
- Copyright © 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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