Observation of the Y (4140) structure in the J/ψϕ mass spectrum in B±→ J/ψϕK± decays

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Observation of the Y (4140) structure in the J/ψϕ mass spectrum in B±→ J/ψϕK± decays

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sword-2019-06-17T15:54:12.original.xml (130 B)

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Date Issued

2017

Journal

Modern Physics Letters A [Particles and Fields; Gravitation; Cosmology and Nuclear Physics]

Publisher

World Scientific Pub Co Pte Lt

Version

Original manuscript

Abstract

© 2017 World Scientific Publishing Company. The observation of the Y (4140) structure in B± → J/ΨφK± decays produced in pp collisions at √ s = 1.96 TeV is reported with a statistical significance greater than 5 standard deviations. A fit to the J/Ψφ mass spectrum is performed assuming the presence of a Breit-Wigner resonance. The fit yields a signal of 19 ± 6 (stat) ± 3 (syst) resonance events, and resonance mass and width of 4143.4+2.9 -3.0 (stat)±0.6 (syst) MeV/c2 and 15.3+10.4 -6.1 (stat)±2.5 (syst) MeV/c2, respectively. The parameters of this resonancelike structure are consistent with values reported from an earlier CDF analysis.

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Creative Commons Attribution-Noncommercial-Share Alike

http://creativecommons.org/licenses/by-nc-sa/4.0/

Persistent DSpace Link

https://hdl.handle.net/1721.1/134295

DOI of Published Version

10.1142/S0217732317501395