Measurement of the relative branching fraction of γr(4S) to charged and neutral B-meson pairs

被引：47

作者：

Alexander, JP ^{[1
]}

Baker, R

Bebek, C

Berger, BE

Berkelman, K

Blanc, F

Boisvert, V

Cassel, DG

Dickson, M

Drell, PS

Ecklund, KM

Ehrlich, R

Foland, AD

Gaidarev, P

Gibbons, L

Gittelman, B

Gray, SW

Hartill, DL

Heltsley, BK

Hopman, PI

Jones, CD

Kreinick, DL

Lohner, M

Magerkurth, A

Meyer, TO

Mistry, NB

Nordberg, E

Patterson, JR

Peterson, D

Riley, D

Thayer, JG

Thies, PG

Valant-Spaight, B

Warburton, A

Avery, P

Prescott, C

Rubiera, AI

Yelton, J

Zheng, J

Brandenburg, G

Ershov, A

Gao, YS

Kim, DYJ

Wilson, R

Browder, TE

Li, Y

Rodriguez, JL

Yamamoto, H

Bergfeld, T

Eisenstein, BI

机构：

[1] Cornell Univ, Ithaca, NY 14853 USA

[2] Univ Florida, Gainesville, FL 32611 USA

[3] Harvard Univ, Cambridge, MA 02138 USA

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

[5] Univ Illinois, Urbana, IL 61801 USA

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

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

[8] Ithaca Coll, Ithaca, NY 14850 USA

[9] Univ Kansas, Lawrence, KS 66045 USA

[10] Univ Minnesota, Minneapolis, MN 55455 USA

[11] SUNY Albany, Albany, NY 12222 USA

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

[13] Univ Oklahoma, Norman, OK 73019 USA

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

[15] Univ Rochester, Rochester, NY 14627 USA

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

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

[18] Syracuse Univ, Syracuse, NY 13244 USA

[19] Univ Texas, Austin, TX 78712 USA

[20] Vanderbilt Univ, Nashville, TN 37235 USA

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

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

[23] CALTECH, Pasadena, CA 91125 USA

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

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

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

[27] Univ Colorado, Boulder, CO 80309 USA

[28] Univ Texas Pan Amer, Edinburg, TX 78539 USA

[29] Yonsei Univ, Seoul 120749, South Korea

[30] Univ Cincinnati, Cincinnati, OH 45221 USA

[31] MIT, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.86.2737

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze 9.7 X 10(6) B (B) over bar pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs produced at the Y(4S) resonance. We measure the rates for B-0 --> J/psiK((*)0) and B+ --> J/psiK((*)+) decays and use the world-average B-meson lifetime ratio to extract the relative widths f(+-)/f(00) = Gamma (Y(4S)-->B+B-)/Gamma (Y(4S)-->B-0(B) over bar (0)) = 1.04 +/- 0.07(stat) +/- 0.04(syst). With the assumption that f(+-) + f(00) = 1, we obtain f(00) = 0.49 +/- 0.02(stat) +/- 0.01(syst) and f(+-) = 0.51 +/- 0.02(stat) +/- 0.01(syst). This production ratio and its uncertainty apply to all exclusive B-meson branching fractions measured at the Y(4S) resonance.

引用

页码：2737 / 2741

页数：5

共 16 条

[1] General analysis of B decays to two pseudoscalars for EWP, rescattering and color suppression effects [J].

Atwood, D ;

Soni, A .

PHYSICS LETTERS B, 1999, 466 (2-4) :326-332

[2] RADIATIVE-CORRECTIONS AND SEMILEPTONIC B-DECAYS [J].

ATWOOD, D ;

MARCIANO, WJ .

PHYSICAL REVIEW D, 1990, 41 (05) :1736-1740

[3] MEASUREMENT OF THE (B)OVER-BAR-]D-ASTERISK-L-(NU)OVER-BAR BRANCHING FRACTIONS AND VERTICAL-BAR-V-CB-VERTICAL-BAR [J].

BARISH, B ;

CHADHA, M ;

CHAN, S ;

COWEN, DF ;

EIGEN, G ;

MILLER, JS ;

OGRADY, C ;

URHEIM, J ;

WEINSTEIN, AJ ;

ACOSTA, D ;

ATHANAS, M ;

MASEK, G ;

PAAR, HP ;

GRONBERG, J ;

KUTSCHKE, R ;

MENARY, S ;

MORRISON, RJ ;

NAKANISHI, S ;

NELSON, HN ;

NELSON, TK ;

QIAO, C ;

RICHMAN, JD ;

RYD, A ;

TAJIMA, H ;

SPERKA, D ;

WITHERELL, MS ;

PROCARIO, M ;

BALEST, R ;

CHO, K ;

DAOUDI, M ;

FORD, WT ;

JOHNSON, DR ;

LINGEL, K ;

LOHNER, M ;

RANKIN, P ;

SMITH, JG ;

ALEXANDER, JP ;

BEBEK, C ;

BERKELMAN, K ;

BLOOM, K ;

BROWDER, TE ;

CASSEL, DG ;

CHO, HA ;

COFFMAN, DM ;

CROWCROFT, DS ;

DRELL, PS ;

EHRLICH, R ;

GAIDAREV, P ;

GALIK, RS ;

GARCIASCIVERES, M .

PHYSICAL REVIEW D, 1995, 51 (03) :1014-1033

[4]

BROWDER TE, 1994, B DECAYS

[5]

BRUN R, 1987, DDEE841 CERN

[6]

BURAS A, 1994, EUR PHYS J C, V11, P93

[7] RATIO OF CHARGED-B-MESON TO NEUTRAL-B-MESON PRODUCTION AT GAMMA(10580) [J].

BYERS, N ;

EICHTEN, E .

PHYSICAL REVIEW D, 1990, 42 (11) :3885-3887

[8]

CABBIBO N, 1963, PHYS REV LETT, V10, P531

[9] Review of Particle Physics [J].

The European Physical Journal C - Particles and Fields, 1998, 3 (1-4) :1-783

[10] The CLEO II silicon vertex detector [J].

Hill, TS .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1998, 418 (01) :32-39

← 1 2 →