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Observation of B_s Production at the Y(5S) Resonance

Bonvicini, G. and Bornheim, A. and Pappas, S. P. and Weinstein, Alan J. (2006) Observation of B_s Production at the Y(5S) Resonance. Physical Review Letters, 96 (2). Art. No. 022002. ISSN 0031-9007. doi:10.1103/PhysRevLett.96.022002.

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Using the CLEO detector at the Cornell Electron Storage Ring, we have observed the B_s meson in e^+e^- annihilation at the Υ(5S) resonance. We find 14 candidates consistent with B_s decays into final states with a J/ψ or a D_s^((*)-). The probability that we have observed a background fluctuation is less than 8×10^(-10). We have established that at the energy of the Υ(5S) resonance B_s production proceeds predominantly through the creation of B_s^*B̅ _s^* pairs. We find σ(e^+e^-→B^s^*B̅ ^*)=[0.11_(-0.03)^(+0.04)(stat)±0.02(syst)]  nb, and set the following limits: σ(e^+e^-→B_sB̅ _s)/σ(e^+e^-→B_s^*B̅ _s^*)<0.16 and [σ(e^+e^-→B_sB̅ _s^*)+σ(e^+e^-→B_s*B̅ _s)]/σ(e^+e^-→B_s*B̅ _s^*)<0.16 (90% C.L.). The mass of the B_s^* meson is measured to be M_(B_s^*=[5.414±0.001(stat)±0.003(syst)]  GeV/c^2.

Item Type:Article
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URLURL TypeDescription
Bornheim, A.0000-0002-0128-0871
Weinstein, Alan J.0000-0002-0928-6784
Additional Information:© 2006 The American Physical Society. Received 12 October 2005; published 18 January 2006. We gratefully acknowledge the effort of the CESR staff in providing us with excellent luminosity and running conditions. This work was supported by the National Science Foundation and the U.S. Department of Energy.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Issue or Number:2
Classification Code:PACS: 13.20.He, 13.25.Gv, 13.25.Hw, 13.66.Bc
Record Number:CaltechAUTHORS:20110516-103347375
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Official Citation:Observation of Bs Production at the Υ(5S) Resonance G. Bonvicini et al. (CLEO Collaboration) Published 18 January 2006 (5 pages) 022002
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23675
Deposited By: Ruth Sustaita
Deposited On:17 May 2011 18:29
Last Modified:09 Nov 2021 16:16

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