Aad, G;
Abbott, B;
Abdallah, J;
Abdelalim, AA;
Abdesselam, A;
Abdinov, O;
Abi, B;
... ATLAS Collaboration, The; + view all
(2012)
Observation of a new χ(b) state in radiative transitions to Υ(1S) and Υ(2S) at ATLAS.
Physical Review Letters
, 108
(15)
, Article 152001. 10.1103/PhysRevLett.108.152001.
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Abstract
The χ(b)(nP) quarkonium states are produced in proton-proton collisions at the Large Hadron Collider at sqrt[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 χ(b)(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 χ(b)(3P) system.
Type: | Article |
---|---|
Title: | Observation of a new χ(b) state in radiative transitions to Υ(1S) and Υ(2S) at ATLAS. |
Location: | US |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevLett.108.152001 |
Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.108.152001 |
Language: | English |
Additional information: | © 2012 CERN, for the ATLAS Collaboration |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
URI: | https://discovery.ucl.ac.uk/id/eprint/1346558 |
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