Observation of a New X-b State in Radiative Transitions to Y(1S) and Y(2S) at ATLAS

UNSPECIFIED (2012) Observation of a New X-b State in Radiative Transitions to Y(1S) and Y(2S) at ATLAS. Physical review letters, 108 (15): 152001. ISSN 1079-7114

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Abstract

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.

Item Type:

Journal Article

Journal or Publication Title:

Physical review letters

Additional Information:

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

Uncontrolled Keywords:

/dk/atira/pure/core/keywords/physics

Subjects:

?? physicsgeneral physics and astronomyphysics and astronomy(all)qc physics ??

Departments:

Faculty of Science and Technology > Physics

ID Code:

58416

Deposited By:

ep_importer_pure

Deposited On:

18 Sep 2012 11:53

Refereed?:

Yes

Published?:

Published

Last Modified:

13 Sep 2024 00:23

URI:

https://eprints.lancs.ac.uk/id/eprint/58416