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Observation of the Υ(1^{3}D_{J}) bottomonium state through decays to π^{+}π^{-}Υ(1S)

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del Amo Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M. et al.

. (2010) Observation of the Υ(1^{3}D_{J}) bottomonium state through decays to π^{+}π^{-}Υ(1S). Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.82 (No.11). article no. 111102(R) . ISSN 1550-7998

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Official URL: http://dx.doi.org/10.1103/PhysRevD.82.111102

Abstract

Based on 122×106Υ(3S) events collected with the BABAR detector, we have observed the Υ(13DJ) bottomonium state through the Υ(3S)→γγΥ(13DJ)→γγπ+π-Υ(1S) decay chain. The significance for the J=2 member of the Υ(13DJ) triplet is 5.8 standard deviations including systematic uncertainties. The mass of the J=2 state is determined to be 10 164.5±0.8(stat)±0.5(syst) MeV/c2. We use the π+π- invariant mass distribution to confirm the consistency of the observed state with the orbital angular momentum assignment of the Υ(13DJ).

Item Type:

Journal Article

Subjects:

Q Science > QC Physics

Divisions:

Faculty of Science > Physics

Journal or Publication Title:

Physical Review D (Particles, Fields, Gravitation and Cosmology)

Publisher:

American Physical Society

ISSN:

1550-7998