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27 April 2024

» pubmed » pmid16486562

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Observation of Bs production at the Y(5S) resonance
G Bonvicini ; D Cinabro ; M Dubrovin ; A Lincoln ; A Bornheim ; S P Pappas ; A J Weinstein ; D M Asner ; K W Edwards ; R A Briere ; G P Chen ; J Chen ; T Ferguson ; G Tatishvili ; H Vogel ; M E Watkins ; J L Rosner ; N E Adam ; J P Alexander ; K Berkelman ; D G Cassel ; V Crede ; J E Duboscq ; K M Ecklund ; R Ehrlich ; L Fields ; L Gibbons ; B Gittelman ; R Gray ; S W Gray ; D L Hartill ; B K Heltsley ; D Hertz ; C D Jones ; J Kandaswamy ; D L Kreinick ; V E Kuznetsov ; H Mahlke-Krüger ; T O Meyer ; P U E Onyisi ; J R Patterson ; D Peterson ; E A Phillips ; J Pivarski ; D Riley ; A Ryd ; A J Sadoff ; H Schwarthoff ; X Shi ; M R Shepherd ; S Stroiney ; W M Sun ; D Urner ; T Wilksen ; K M Weaver ; M Weinberger ; S B Athar ; P Avery ; L Breva-Newell ; R Patel ; V Potlia ; H Stoeck ; J Yelton ; P Rubin ; C Cawlfield ; B I Eisenstein ; G D Gollin ; I Karliner ; D Kim ; N Lowrey ; P Naik ; C Sedlack ; M Selen ; E J White ; J Williams ; J Wiss ; D Besson ; T K Pedlar ; D Cronin-Hennessy ; K Y Gao ; D T Gong ; J Hietala ; Y Kubota ; T Klein ; B W Lang ; S Z Li ; R Poling ; A W Scott ; A Smith ; S Dobbs ; Z Metreveli ; K K Seth ; A Tomaradze ; P Zweber ; J Ernst ; K Arms ; H Severini ; S A Dytman ; W Love ; S Mehrabyan ; J A Mueller ; V Savinov ; Z Li ; A Lopez ; H Mendez ; J Ramirez ; G S Huang ; D H Miller ; V Pavlunin ; B Sanghi ; I P J Shipsey ; G S Adams ; M Anderson ; J P Cummings ; I Danko ; J Napolitano ; Q He ; H Muramatsu ; C S Park ; E H Thorndike ; T E Coan ; Y S Gao ; F Liu ; Y Maravin ; M Artuso ; C Boulahouache ; S Blusk ; J Butt ; O Dorjkhaidav ; J Li ; N Menaa ; R Mountain ; R Nandakumar ; K Randrianarivony ; R Redjimi ; R Sia ; T Skwarnicki ; S Stone ; J C Wang ; K Zhang ; S E Csorna ; ;
Date:	20 Jan 2006
Journal:	Phys Rev Lett, 96 (2), 022002
Abstract:	Using the CLEO detector at the Cornell Electron Storage Ring, we have observed the Bs meson in e+e- annihilation at the Y(5S) resonance. We find 14 candidates consistent with Bs decays into final states with a J/psi or a Ds()- . The probability that we have observed a background fluctuation is less than 8 x 10(-10) . We have established that at the energy of the Y(5S) resonance Bs production proceeds predominantly through the creation of BsBs* pairs. We find sigma(e+e- --> BsBs) = [0.11(-0.03))(+0.04)(stat) +/- 0.02(syst)]nb , and set the following limits: sigma(e+e- --> BsBs)/ sigma(e+ e- --> BsBs) <0.16 and [sigma(e+e- --> BsBs) + sigma(e+e- --> BsBs)]/sigma(e+e- -->BsBs) < 0.16 (90% C.L.). The mass of the Bs* meson is measured to be M(Bs*) = [5.414+/- 0.001(stat) +/- 0.003(syst)] GeV/c2 .
Source:	PubMed, pmid16486562
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