(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

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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 > 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:	Date Event January 2010 Published
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

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