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

Preview

PDF (PhysRevLett.113.212004)
PhysRevLett.113.212004.pdf - Published Version
Available under License Creative Commons Attribution.
Download (380kB)

Abstract

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).

Item Type:

Journal Article

Journal or Publication Title:

Physical review letters

Additional Information:

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

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/3100/3100

Subjects:

?? b-c mesonspectroscopy equationgeneral physics and astronomyphysics and astronomy(all) ??

Departments:

Faculty of Science and Technology > Physics

ID Code:

72528

Deposited By:

ep_importer_pure

Deposited On:

22 Jan 2015 10:15

Refereed?:

Yes

Published?:

Published

Last Modified:

18 Nov 2024 01:10

URI:

https://eprints.lancs.ac.uk/id/eprint/72528