Observation of Bs production at the Υ(5S) resonance -: art. no. 022002

被引：27

作者：

Bonvicini, G ^{[1
]}

Cinabro, D

Dubrovin, M

Lincoln, A

Bornheim, A

Pappas, SP

Weinstein, AJ

Asner, DM

Edwards, KW

Briere, RA

Chen, GP

Chen, J

Ferguson, T

Tatishvili, G

Vogel, H

Watkins, ME

Rosner, JL

Adam, NE

Alexander, JP

Berkelman, K

Cassel, DG

Crede, V

Duboscq, JE

Ecklund, KM

Ehrlich, R

Fields, L

Gibbons, L

Gittelman, B

Gray, R

Gray, SW

Hartill, DL

Heltsley, BK

Hertz, D

Jones, CD

Kandaswamy, J

Kreinick, DL

Kuznetsov, VE

Mahlke-Krüger, H

Meyer, TO

Onyisi, PUE

Patterson, JR

Peterson, D

Phillips, EA

Pivarski, J

Riley, D

Ryd, A

Sadoff, AJ

Schwarthoff, H

Shi, X

Shepherd, MR

机构：

[1] Wayne State Univ, Detroit, MI 48202 USA

[2] CALTECH, Pasadena, CA 91125 USA

[3] Carleton Univ, Ottawa, ON K1S 5B6, Canada

[4] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[5] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[6] Cornell Univ, Ithaca, NY 14853 USA

[7] Univ Florida, Gainesville, FL 32611 USA

[8] George Mason Univ, Fairfax, VA 22030 USA

[9] Univ Illinois, Urbana, IL 61801 USA

[10] Univ Kansas, Lawrence, KS 66045 USA

[11] Luther Coll, Decorah, IA 52101 USA

[12] Univ Minnesota, Minneapolis, MN 55455 USA

[13] Northwestern Univ, Evanston, IL 60208 USA

[14] SUNY Albany, Albany, NY 12222 USA

[15] Ohio State Univ, Columbus, OH 43210 USA

[16] Univ Oklahoma, Norman, OK 73019 USA

[17] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[18] Univ Puerto Rico, Mayaguez, PR 00681 USA

[19] Purdue Univ, W Lafayette, IN 47907 USA

[20] Rensselaer Polytech Inst, Troy, NY 12180 USA

[21] Univ Rochester, Rochester, NY 14627 USA

[22] So Methodist Univ, Dallas, TX 75275 USA

[23] Syracuse Univ, Syracuse, NY 13244 USA

[24] Vanderbilt Univ, Nashville, TN 37235 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.96.022002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using the CLEO detector at the Cornell Electron Storage Ring, we have observed the B-s meson in e(+)e(-) annihilation at the Upsilon(5S) resonance. We find 14 candidates consistent with B-s decays into final states with a J/psi or a D-s(()*()-). The probability that we have observed a background fluctuation is less than 8x10(-10). We have established that at the energy of the Upsilon(5S) resonance B-s production proceeds predominantly through the creation of B-s*($) over bar (s)* pairs. We find sigma(e(+)e(-)-> B-s* (B) over bar (s)*)=[0.11(-0.03)(+0.04)(stat)+/- 0.02(syst)] nb, and set the following limits: sigma(e(+)e(-)-> B-s (B) over bar (s))/sigma(e(+)e(-)-> B-s*(B) over bar (s)*)< 0.16 and [sigma(e(+)e(-)-> B-s(B) over bar (s)*)+sigma(e(+)e(-)-> B-s*(B) over bar (s))]/sigma(e(+)e(-)-> B-s*(B) over bar (s)*)< 0.16 (90% C.L.). The mass of the B-s(*) meson is measured to be M-Bs*=[5.414 +/- 0.001(stat)+/- 0.003(syst)] GeV/c(2).

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