We present a study of the inclusive D*± production in the decay of Υ(1S) using (98.6±0.9)×106 Υ(2S) mesons collected with the BABAR detector at the Υ(2S) resonance. Using the decay chain Υ(2S)→π+π−Υ(1S), Υ(1S)→D*±X, where X is unobserved, we measure the branching fraction ℬ[Υ(1S)→D*±X]=(2.52±0.13(stat)±0.15(syst))% and the D*± momentum distribution in the rest frame of the Υ(1S). We find evidence for an excess of D*± production over the expected rate from the virtual photon annihilation process Υ(1S)→γ∗→cc⎯⎯→D*±X.

Aubert, B., Karyotakis, Y., Lees, J.p., Poireau, V., Prencipe, E., Prudent, X., et al. (2010). Observation of inclusive D*(+/-) production in the decay of Y(1S). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 81(1), 1-8 [10.1103/PhysRevD.81.011102].

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

PATRIGNANI, CLAUDIA;
2010

Abstract

We present a study of the inclusive D*± production in the decay of Υ(1S) using (98.6±0.9)×106 Υ(2S) mesons collected with the BABAR detector at the Υ(2S) resonance. Using the decay chain Υ(2S)→π+π−Υ(1S), Υ(1S)→D*±X, where X is unobserved, we measure the branching fraction ℬ[Υ(1S)→D*±X]=(2.52±0.13(stat)±0.15(syst))% and the D*± momentum distribution in the rest frame of the Υ(1S). We find evidence for an excess of D*± production over the expected rate from the virtual photon annihilation process Υ(1S)→γ∗→cc⎯⎯→D*±X.
2010
Aubert, B., Karyotakis, Y., Lees, J.p., Poireau, V., Prencipe, E., Prudent, X., et al. (2010). Observation of inclusive D*(+/-) production in the decay of Y(1S). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 81(1), 1-8 [10.1103/PhysRevD.81.011102].
Aubert, B; Karyotakis, Y; Lees, Jp; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Tico, Jg; Grauges, E; Martinelli, M; Palano, A; Pappagallo, M; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/544779
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