First observation of the decay B → J/ψΦK

被引：17

作者：

Anastassov, A ^{[1
]}

Duboscq, JE

Gan, KK

Gwon, C

Hart, T

Honscheid, K

Hufnagel, D

Kagan, H

Kass, R

Lorenc, J

Pedlar, TK

Schwarthoff, H

von Toerne, E

Zoeller, MM

Richichi, SJ

Severini, H

Skubic, P

Undrus, A

Chen, S

Fast, J

Hinson, JW

Lee, J

Menon, N

Miller, DH

Shibata, EI

Shipsey, IPJ

Pavlunin, V

Cronin-Hennessy, D

Kwon, Y

Lyon, AL

Thorndike, EH

Jessop, CP

Marsiske, H

Perl, ML

Savinov, V

Ugolini, D

Zhou, X

Coan, TE

Fadeyev, V

Korolkov, I

Maravin, Y

Narsky, I

Stroynowski, R

Ye, J

Wlodek, T

Artuso, M

Ayad, R

Boulahouache, C

Bukin, K

Dambasuren, E

机构：

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

[2] Univ Oklahoma, Norman, OK 73019 USA

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

[4] Univ Rochester, Rochester, NY 14627 USA

[5] Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA

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

[7] Syracuse Univ, Syracuse, NY 13244 USA

[8] Vanderbilt Univ, Nashville, TN 37235 USA

[9] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

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

[11] CALTECH, Pasadena, CA 91125 USA

[12] Univ Calif San Diego, La Jolla, CA 92093 USA

[13] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

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

[15] Univ Colorado, Boulder, CO 80309 USA

[16] Cornell Univ, Ithaca, NY 14853 USA

[17] Univ Florida, Gainesville, FL 32611 USA

[18] Harvard Univ, Cambridge, MA 02138 USA

[19] Univ Hawaii Manoa, Honolulu, HI 96822 USA

[20] Univ Illinois, Urbana, IL 61801 USA

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

[22] Inst Particle Phys, Ottawa, ON, Canada

[23] McGill Univ, Montreal, PQ H3A 2T8, Canada

[24] Ithaca Coll, Ithaca, NY 14850 USA

[25] Univ Minnesota, Minneapolis, MN 55455 USA

[26] SUNY Albany, Albany, NY 12222 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.84.1393

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first observation of the decay B --> J/psi phi K. Using 9.6 X 10(6) B (B) over bar meson pairs collected with the CLEO detector, we have observed ten fully reconstructed B --> J/psi phi K candidates, whereas the estimated background is 0.5 +/- 0.2 event. We obtain a branching fraction of B(B --> J/psi phi K) = (8.8(-3.0)(+3.5)[stat] +/- 1.3[syst]) X 10(-5). This is the first observed B meson decay requiring the creation of an additional s (s) over bar quark pair.

引用

页码：1393 / 1397

页数：5

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