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2007-05-24

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/140075

Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/c2 in the Reaction e+e−→π+π−ψ(2S) Measured at BABAR

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https://doi.org/10.1103/PhysRevLett.98.212001

Abstract

We present a measurement of the cross section of the process e + e − → π + π − ψ ( 2 S ) 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.

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Física de partícules, Experiments

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Particle physics, Experiments

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Articles publicats en revistes (Física Quàntica i Astrofísica)

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GRAUGÉS POUS, Eugeni and BABAR Collaboration. Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/c2 in the Reaction e+e−→π+π−ψ(2S) Measured at BABAR. Physical Review Letters. 2007. Vol. 98, num. 21, pags. 212001. ISSN 0031-9007. [consulted: 15 of August of 2026]. Available at: https://hdl.handle.net/2445/140075

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