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Observation of inclusive D*(+/-) production in the decay of Y(1S)

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BaBaR Collaboration (Including:

Aubert, B., Karyotakis, Y., Lees, J. P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Tico, J. Garra, Grauges, E., Martinelli, M. et al.
). (2010) Observation of inclusive D*(+/-) production in the decay of Y(1S). Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.81 (No.1). article no. 011102. doi:10.1103/PhysRevD.81.011102 ISSN 1550-7998.

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Official URL: http://dx.doi.org/10.1103/PhysRevD.81.011102

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Abstract

We present a study of the inclusive D*(+/-) production in the decay of Y(1S) using (98.6 +/- 0.9) X 10(6) Y(2S) mesons collected with the BABAR detector at the Y(2S) resonance. Using the decay chain Y(2S) -> pi(+)pi Y-(1S), Y(1S) -> D*X-+/-, where X is unobserved, we measure the branching fraction B[Y(1S) -> D*X-+/-] = (2.52 +/- 0.13(stat) +/- 0.15(syst)% and the D*(+/-) momentum distribution in the rest frame of the Y(1S). We find evidence for an excess of D*+/- production over the expected rate from the virtual photon annihilation process Y(1S) -> gamma* -> c (c) over bar -> D*X-+/-.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: January 2010
Dates:
DateEvent
January 2010Published
Volume: Vol.81
Number: No.1
Number of Pages: 8
Page Range: article no. 011102
DOI: 10.1103/PhysRevD.81.011102
Status: Peer Reviewed
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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