Observation of an Excited B±c Meson State with the ATLAS Detector

UNSPECIFIED (2014) Observation of an Excited B±c Meson State with the ATLAS Detector. Physical review letters, 113 (21): 212004. ISSN 1079-7114

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A 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 decayB(c)(+/-) -> J/psi pi(+/-). The state appears in the m(B-c(+/-)pi(+)pi(-)) - m(B-c(+/-)) - 2m(pi(+/-)) 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).

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Journal Article
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Physical review letters
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This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2014 CERN, for the ATLAS Collaboration
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?? b-c mesonspectroscopy equationgeneral physics and astronomyphysics and astronomy(all) ??
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22 Jan 2015 10:15
Last Modified:
16 Jul 2024 09:40