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Título: | Observation of inclusive D*(+/-) production in the decay of Y(1S) |
Autor: | Babar Collaboration; Azzolini, Virginia; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Aubert, B.; Lees, J. P. | Fecha de publicación: | 25-ene-2010 | Editor: | American Physical Society | Citación: | Physical Review - Section D - Particles and Fields 81 (1): 011102 (2010) | Resumen: | 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-+/-. | Versión del editor: | http://dx.doi.org/ 10.1103/PhysRevD.81.011102 | URI: | http://hdl.handle.net/10261/23203 | DOI: | 10.1103/PhysRevD.81.011102 | ISSN: | 1550-7998 |
Aparece en las colecciones: | (IFIC) Artículos |
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Observation of inclusive.pdf | 210,66 kB | Adobe PDF | Visualizar/Abrir |
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