Observation of a new χb state in radiative transitions to Υ(1S) and Υ(2S) at ATLAS

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dc.contributor.authorAad, G.
dc.contributor.authorATLAS Collaboration,
dc.date.issued2012
dc.description.abstractThe 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.
dc.description.statementofresponsibilityG. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M.J. White ... et al. (ATLAS Collaboration)
dc.identifier.citationPhysical Review Letters, 2012; 108(15):152001-1-152001-17
dc.identifier.doi10.1103/PhysRevLett.108.152001
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.urihttp://hdl.handle.net/2440/101781
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.grantARC
dc.rights© 2012 CERN, for the ATLAS Collaboration. Published by the American Physical Society 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.
dc.source.urihttps://doi.org/10.1103/physrevlett.108.152001
dc.subjectATLAS Collaboration
dc.titleObservation of a new χb state in radiative transitions to Υ(1S) and Υ(2S) at ATLAS
dc.title.alternativeObservation of a new chi b state in radiative transitions to Upsilon(1S) and Upsilon(2S) at ATLAS
dc.typeJournal article
pubs.publication-statusPublished

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