Agustoni, Marco; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Gallo, Valentina; Haug, Sigve; Kruker, Tobias; Marti, Lukas; Meloni, Federico; Schneider, Basil; Sciacca, Gianfranco; Stramaglia, Maria; Stucci, Stefania Antonia; Weber, Michael (2014). Observation of an Excited B±c Meson State with the ATLAS Detector. Physical review letters, 113(21), p. 212004. American Physical Society 10.1103/PhysRevLett.113.212004
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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 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) .
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC) 08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Agustoni, Marco, Beck, Hans Peter, Cervelli, Alberto, Ereditato, Antonio, Gallo, Valentina, Haug, Sigve, Kruker, Tobias, Marti, Lukas, Meloni, Federico, Schneider, Basil, Sciacca, Gianfranco, Stramaglia, Maria Elena, Stucci, Stefania, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0031-9007 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Jan Dirk Brinksma |
Date Deposited: |
10 Jun 2015 10:00 |
Last Modified: |
02 Mar 2023 23:26 |
Publisher DOI: |
10.1103/PhysRevLett.113.212004 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt. |
BORIS DOI: |
10.7892/boris.68678 |
URI: |
https://boris.unibe.ch/id/eprint/68678 |
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