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-+/-.

Observation of inclusive D*(+/-) production in the decay of Y(1S) / Aubert, B., Karyotakis, Y., Lees, J.P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Tico, J.G., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Sun, L., Battaglia, M., Brown, D.N., Hooberman, B., Kerth, L.T., Kolomensky, Y.G., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 81:(2010). [10.1103/physrevd.81.011102]

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

CAVOTO, Gianluca;FACCINI, Riccardo;FERRONI, Fernando;GASPERO, Mario;C. Voena;
2010

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-+/-.
2010
01 Pubblicazione su rivista::01a Articolo in rivista
Observation of inclusive D*(+/-) production in the decay of Y(1S) / Aubert, B., Karyotakis, Y., Lees, J.P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Tico, J.G., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Sun, L., Battaglia, M., Brown, D.N., Hooberman, B., Kerth, L.T., Kolomensky, Y.G., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 81:(2010). [10.1103/physrevd.81.011102]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/227280
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