Observation of an Excited Meson State with the ATLAS Detector
Journal Article
·
· Physical Review Letters
We perform a search for excited states of the B±c meson using 4.9 fb-1 of 7 TeV and 19.2 fb-1 of 8 TeV pp collision data collected by the ATLAS experiment at the LHC. A new state is observed through its hadronic transition to the ground state, with the latter detected in the decay B±c →J/ψπ±. The state appears in the m(B±c π+π₋)₋m(B±c )₋2m(π±) mass difference distribution with a significance of 5.2 standard deviations. The mass of the observed state is 6842±4±5 MeV, where the first error is statistical and the second is systematic. The mass and decay of this state are consistent with expectations for the second S-wave state of the B±c meson, B±c (2S).
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- ATLAS Collaboration
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1180798
- Alternate ID(s):
- OSTI ID: 1254170; OSTI ID: 1523994
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Vol. 113 Journal Issue: 21; ISSN 0031-9007
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 47 works
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