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TitleObservation of an Excited Bc+/- Meson State with the ATLAS Detector
Author(s)Onofre, A.
Castro, Nuno Filipe Silva Fernandes
ATLAS Collaboration
Issue date2014
PublisherAmerican Physical Society
JournalPhysical Review Letters
CitationAad, G., Abbott, B., Abdallah, J., Abdel Khalek, S., Abdinov, O., Aben, R., . . . Zwalinski, L. (2014). Observation of an excited Bc± meson state with the ATLAS detector. Physical Review Letters, 113(21). doi: 10.1103/PhysRevLett.113.212004
Abstract(s)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 mðB c πþπ−Þ − mðB c Þ − 2mðπ Þ 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 ð2SÞ.
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AccessOpen access
Appears in Collections:LIP - Artigos/papers

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