Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/48825

TitleObservation of a New X-b State in Radiative Transitions to Y(1S) and Y(2S) at ATLAS
Author(s)Onofre, A.
Castro, Nuno Filipe Silva Fernandes
ATLAS Collaboration
Issue date2012
PublisherAmerican Physical Society
JournalPhysical Review Letters
CitationAad, G., Abbott, B., Abdallah, J., Abdelalim, A. A., Abdesselam, A., Abdinov, O., . . . Collaboration, A. (2012). Observation of a New X-b State in Radiative Transitions to Y(1S) and Y(2S) at ATLAS. Physical Review Letters, 108(15). doi: 10.1103/PhysRevLett.108.152001
Abstract(s)The χb(nP) quarkonium states are produced in proton-proton collisions at the Large Hadron Collider at √s=7  TeV and recorded by the ATLAS detector. Using a data sample corresponding to an integrated luminosity of 4.4  fb−1, these states are reconstructed through their radiative decays to Υ(1S,2S) with Υ→μ+μ−. In addition to the mass peaks corresponding to the decay modes χb(1P,2P)→Υ(1S)γ, a new structure centered at a mass of 10.530±0.005(stat)±0.009(syst)  GeV is also observed, in both the Υ(1S)γ and Υ(2S)γ decay modes. This structure is interpreted as the χb(3P) system.
TypeArticle
URIhttp://hdl.handle.net/1822/48825
DOI10.1103/PhysRevLett.108.152001
ISSN0031-9007
e-ISSN1079-7114
Publisher versionhttps://journals.aps.org/prl/abstract/10.1103/PhysRevLett.108.152001
Peer-Reviewedyes
AccessOpen access
Appears in Collections:LIP - Artigos/papers

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