Jones, Roger and Chilingarov, Alexandre and Hughes, Gareth and Kartvelishvili, Vakhtang and Smizanska, Maria and Bouhova-Thacker, Evelina and Davidson, Ruth and Fox, Harald and Borissov, Guennadi and Price, Darren and Love, Peter and Cheatham, Sue and Catmore, James and Walder, James and Burke, Stephen and Long, Robin and Barton, Adam (2012) Observation of a New X-b State in Radiative Transitions to Y(1S) and Y(2S) at ATLAS. Physical Review Letters, 108 (15). ISSN 1079-7114Full text not available from this repository.
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.
|Journal or Publication Title:||Physical Review Letters|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited On:||18 Sep 2012 12:53|
|Last Modified:||20 Feb 2013 12:26|
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