Confirmation of the $Y (4260)$ resonance production in initial state radiation

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20 November 2006

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 74 (9) , 091104
https://doi.org/10.1103/physrevd.74.091104

Abstract

Using

13.3 {fb}^{- 1}

of

e^{+} e^{-}

collision data taken in the

Υ (1 S - 4 S)

region with the CLEO III detector at the CESR collider, a search has been made for the new resonance

Y (4260)

recently reported by the BABAR Collaboration. The production of

Y (4260)

in initial state radiation (ISR), and its decay into

π^{+} π^{-} J / ψ

, are confirmed. A good quality fit to our data is obtained with a single resonance. We determine

M (Y (4260)) = (4284_{- 16}^{+ 17} (stat) \pm 4 (syst)) MeV / c^{2}

,

Γ (Y (4260)) = (73_{- 25}^{+ 39} (stat) \pm 5 (syst)) MeV / c^{2}

, and

Γ_{e e} (Y (4260)) \times B (Y (4260) \to π^{+} π^{-} J / ψ) = ({8.9}_{- 3.1}^{+ 3.9} (stat) \pm 1.8 (syst)) eV / c^{2}

.

All Related Versions

Version 1, 2006-11-13, ArXiv

This publication has 12 references indexed in Scilit:

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