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Title

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

AuthorsBabar Collaboration; Azzolini, Virginia; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC; Oyanguren, Arantza CSIC ORCID; Aubert, B.; Lees, J. P.
Issue Date25-Jan-2010
PublisherAmerican Physical Society
CitationPhysical Review - Section D - Particles and Fields 81 (1): 011102 (2010)
AbstractWe 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-+/-.
Publisher version (URL)http://dx.doi.org/ 10.1103/PhysRevD.81.011102
URIhttp://hdl.handle.net/10261/23203
DOI10.1103/PhysRevD.81.011102
ISSN1550-7998
Appears in Collections:(IFIC) Artículos

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