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Evidence of a broad structure at an invariant mass of 4.32 GeV/c(2) in the reaction e(+)e(-)->pi(+)pi(-)psi(2S) measured at BABAR

Aubert, B; Barate, R; Bona, M; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, JP; ... Babar Collaboration; + view all (2007) Evidence of a broad structure at an invariant mass of 4.32 GeV/c(2) in the reaction e(+)e(-)->pi(+)pi(-)psi(2S) measured at BABAR. PHYS REV LETT , 98 (21) , Article 212001. 10.1103/PhysRevLett.98.212001. Green open access

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Abstract

We present a measurement of the cross section of the process e(+)e(-)->pi(+)pi(-)psi(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at the SLAC PEP-II e(+)e(-) storage rings. The study is based on 298 fb(-1) of data recorded with the BABAR detector. A structure is observed in the cross section not far above threshold, near 4.32 GeV. We also investigate the compatibility of this structure with the Y(4260) previously reported by this experiment.

Type: Article
Title: Evidence of a broad structure at an invariant mass of 4.32 GeV/c(2) in the reaction e(+)e(-)->pi(+)pi(-)psi(2S) measured at BABAR
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.98.212001
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.98.212001
Language: English
Additional information: © 2007 The American Physical Society
Keywords: Y(4260)
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1303848
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