Measurement of the muonic branching fractions of the narrow upsilon resonances -: art. no. 012001

被引：27

作者：

Adams, GS ^{[1
]}

Chasse, M

Cravey, M

Cummings, JP

Danko, I

Napolitano, J

Cronin-Hennessy, D

Park, CS

Park, W

Thayer, JB

Thorndike, EH

Coan, TE

Gao, YS

Liu, F

Stroynowski, R

Artuso, M

Boulahouache, C

Blusk, S

Butt, J

Dambasuren, E

Dorjkhaidav, O

Menaa, N

Mountain, R

Muramatsu, H

Nandakumar, R

Redjimi, R

Sia, R

Skwarnicki, T

Stone, S

Wang, JC

Zhang, K

Csorna, SE

Bonvicini, G

Cinabro, D

Dubrovin, M

Bornheim, A

Pappas, SP

Weinstein, AJ

Briere, RA

Chen, GP

Ferguson, T

Tatishvili, G

Vogel, H

Watkins, ME

Adam, NE

Alexander, JP

Berkelman, K

Cassel, DG

Duboscq, JE

Ecklund, KM

机构：

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

[2] Univ Rochester, Rochester, NY 14627 USA

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

[4] Vanderbilt Univ, Nashville, TN 37235 USA

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

[6] Syracuse Univ, Syracuse, NY 13244 USA

[7] CALTECH, Pasadena, CA 91125 USA

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

[9] Cornell Univ, Ithaca, NY 14853 USA

[10] Univ Florida, Gainesville, FL 32611 USA

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

[12] Univ Illinois, Urbana, IL 61801 USA

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

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

[15] Univ Kansas, Lawrence, KS 66045 USA

[16] Univ Minnesota, Minneapolis, MN 55455 USA

[17] Northwestern Univ, Evanston, IL 60208 USA

[18] SUNY Albany, Albany, NY 12222 USA

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

[20] Univ Pittsburgh, Pittsburgh, PA 15260 USA

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

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

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.94.012001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The decay branching fractions of the three narrow Y resonances to mu(+)mu(-) have been measured by analyzing about 4.3 fb(-1) e(+)e(-) data collected with the CLEO III detector. The branching fraction B(Y(1S)-->mu(+)mu(-))=(2.49+/-0.02+/-0.07)% is consistent with the current world average, but B(Y(2S)-->mu(+)mu(-))=(2.03+/-0.03+/-0.08)% and B(Y(3S)-->mu(+)mu(-))=(2.39+/-0.07+/-0.10)% are significantly larger than prior results. These new muonic branching fractions imply a narrower total decay width for the Y(2S) and Y(3S) resonances and lower other branching fractions that rely on these decays in their determination.

引用

页数：5

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