期刊
PHYSICS LETTERS B
卷 783, 期 -, 页码 200-206出版社
ELSEVIER
DOI: 10.1016/j.physletb.2018.06.046
关键词
Lambda(+)(c); W-exchange; Absolute branching fraction; BESIII
资金
- National Key Basic Research Program of China [2015CB856700]
- National Natural Science Foundation of China (NSFC) [11235011, 11335008, 11425524, 11625523, 11635010]
- Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program
- CAS Center for Excellence in Particle Physics (CCEPP)
- NSFC [U1332201, U1532257, U1532258]
- CAS Key Research Program of Frontier Sciences [QYZDJ-SSW-SLH003, QYZDJ-SSW-SLH040]
- CAS [U1332201, U1532257, U1532258, QYZDJ-SSW-SLH003, KJCX2-YW-N29, KJCX2-YW-N45]
- 100 Talents Program of CAS
- National 1000 Talents Program of China
- INPAC
- Shanghai Key Laboratory for Particle Physics and Cosmology
- German Research Foundation DFG [CRC 1044, FOR 2359]
- Instituto Nazionale di Fisica Nucleare, Italy
- Koninklijke Nederlandse Akademie van Wetenschappen (KNAW) [530-4CDP03]
- Ministry of Development of Turkey [DPT2006K-120470]
- National Science and Technology fund
- Swedish Research Council
- U.S. Department of Energy [DE-FG02-05ER41374, DE-SC-0010118, DE-SC-0010504, DE-SC-0012069]
- University of Groningen (RuG)
- GSI Helmholtzzentrum fur Schwerionenforschung GmbH (GSI), Darmstadt
- WCU Program of National Research Foundation of Korea [R32-2008-000-10155-0]
- China Postdoctoral Science Foundation
- Beijing Municipal Government [CITTCD201704047]
We report the first measurements of absolute branching fractions for the W-exchange-only processes Lambda(+)(c) -> Xi K-0(+) and Lambda(+)(c)-> Xi(1530)K-0(+) with the double-tag technique, by analyzing an e(+)e(-) collision data sample, that corresponds to an integrated luminosity of 567 pb(-1) collected at a center-of-mass energy of 4.6 GeV by the BESIII detector. The branching fractions are measured to be B(Lambda(+)(c)-> Xi K-0(+)) = (5.90 +/- 0.86 +/- 0.39) x 10(-3) and B(Lambda(+)(c)-> Xi(1530)K-0(+)) = (5.02 +/- 0.99 +/- 0.31) x 10(-3), where the first uncertainties are statistical and the second systematic. Our results are more precise than the previous relative measurements. (c) 2018 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).
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