Rights statement: 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. © 2012 CERN, for the ATLAS Collaboration
Final published version, 368 KB, PDF document
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Observation of a New X-b State in Radiative Transitions to Y(1S) and Y(2S) at ATLAS
AU - Jones, Roger
AU - Chilingarov, Alexandre
AU - Hughes, Gareth
AU - Kartvelishvili, Vakhtang
AU - Smizanska, Maria
AU - Bouhova-Thacker, Evelina
AU - Davidson, Ruth
AU - Fox, Harald
AU - Borissov, Guennadi
AU - Price, Darren
AU - Love, Peter
AU - Cheatham, Sue
AU - Catmore, James
AU - Walder, James
AU - Burke, Stephen
AU - Long, Robin
AU - Barton, Adam
AU - The ATLAS collaboration
N1 - 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. © 2012 CERN, for the ATLAS Collaboration
PY - 2012/4/9
Y1 - 2012/4/9
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84859575430&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.108.152001
DO - 10.1103/PhysRevLett.108.152001
M3 - Journal article
AN - SCOPUS:84859575430
VL - 108
JO - Physical review letters
JF - Physical review letters
SN - 1079-7114
IS - 15
M1 - 152001
ER -