Results are presented on χb1,2(2P) → χΥ(1S) transitions from e+e- → Υ(3S) → γχb1,2(2P) decays. The data were collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. The integrated luminosity of the data sample is 28.0 fb-1, corresponding to 121.3 × 106 Υ(3S) decays. Signals of χb1,2(2P) are observed over a negligible background. Improved precision measurements of branching fractions are obtained. First measurements of the χb1,2(2P) angular distributions are performed. No evidence is found for the presence of χb0(2P) → ωΥ(1S) decay mode.

Study of χ b(2P) → ωϒ(1S) transitions in ϒ(3S) → χ b(2P) decays at BABAR

Cenci, R.;Neri, N.;Simi, G.;Calderini, G.;Marchiori, G.;Batignani, G.;Bettarini, S.;Carpinelli, M.;Casarosa, G.;Forti, F.;Giorgi, M.  A.;Oberhof, B.;Paoloni, E.;Rama, M.;Rizzo, G.;Zani, L.;
2026-01-01

Abstract

Results are presented on χb1,2(2P) → χΥ(1S) transitions from e+e- → Υ(3S) → γχb1,2(2P) decays. The data were collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at SLAC. The integrated luminosity of the data sample is 28.0 fb-1, corresponding to 121.3 × 106 Υ(3S) decays. Signals of χb1,2(2P) are observed over a negligible background. Improved precision measurements of branching fractions are obtained. First measurements of the χb1,2(2P) angular distributions are performed. No evidence is found for the presence of χb0(2P) → ωΥ(1S) decay mode.
2026
Lees, J.  p.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Brown, D.  n.; Kolomensky, Yu.  g.; Fritsch, M.; Koch, H.; Cheaib, R.; H...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1364287
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