10.1103-PhysRevLett.113.212004.pdf (371.21 kB)
Observation of an excited B±c meson state with the ATLAS detector
journal contribution
posted on 2023-06-09, 06:04 authored by Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, C A Chavez Barajas, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, I Santoyo Castillo, K Suruliz, Mark SuttonMark Sutton, Iacopo Vivarelli, The ATLAS CollaborationA search for excited states of the B±c meson is performed 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/?p±. The state appears in the m(B±cp+p-)-m(B±c)-2m(p±) 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).
Funding
ATLAS; G0275; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/I006048/1
History
Publication status
- Published
File Version
- Published version
Journal
Physical Review LettersISSN
0031-9007Publisher
American Physical SocietyExternal DOI
Issue
21Volume
113Page range
1-18Article number
a212004Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Experimental Particle Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-05-03First Open Access (FOA) Date
2017-05-03First Compliant Deposit (FCD) Date
2017-05-03Usage metrics
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