Observation of a New [subscript χb] State in Radiative Transitions to Υ(1S) and Υ(2S) at ATLAS
The [subscript 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[superscript -1], these states are reconstructed through their radia...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/71579 https://orcid.org/0000-0002-7586-7253 |
| Summary: | The [subscript 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[superscript -1], these states are reconstructed through their radiative decays to Υ(1S,2S) with Υ→μ[superscript +]μ[superscript -]. 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 [subscript χb](3P) system. |
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