SEARCH FOR THE DECAY D0[-MU+MU-

被引：6

作者：

MISHRA, CS

BROWN, CN

COOPER, WE

GOUDNER, K

KAPLAN, DM

MARTIN, VM

PRESTON, RS

SA, J

TANIKELLA, V

ISENHOWER, LD

SADLER, ME

SCHNATHORST, R

LEDERMAN, LM

SCHUB, MH

GIDAL, G

KOWITT, MS

LUK, KB

CAREY, TA

JEPPESEN, RE

KAPUSTINSKY, JS

LANE, DW

LEITCH, MJ

LILLBERG, JW

MCGAUGHEY, PL

MOSS, JM

PENG, JC

CHILDERS, RL

DARDEN, CW

TENG, PK

机构：

[1] NO ILLINOIS UNIV,DE KALB,IL 60115

[2] ABILENE CHRISTIAN UNIV,ABILENE,TX 79699

[3] UNIV CHICAGO,CHICAGO,IL 60637

[4] LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[5] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545

[6] UNIV S CAROLINA,COLUMBIA,SC 29208

[7] ACAD SINICA,INST PHYS,TAIPEI 115,TAIWAN

[8] UNIV CALIF BERKELEY,BERKELEY,CA 94720

来源：

PHYSICAL REVIEW D | 1994年 / 50卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.50.R9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using a silicon-microstrip detector array to identify secondary vertices occurring downstream of a short platinum target, we have searched for the decay D0-->mu+mu-. Normalized relative to the j/psi-->mu+mu- signal observed in the same data sample, for a 3.25-mm minimum decay distance our branching-ratio sensitivity is (4.8 +/- 1.4)X 10(-6) per event, and after background subtraction we observe -4.1 +/- 4.8 events. Using the statistical approach advocated by the Particle Data Group, we obtain a limit B(D0-->mu+mu-)<3.1 X 10(-5) at 90% confidence, confirming with a different technique the limit previously obtained by Louis et al. The interpretation of the upper limit involves complex statistical issues; we present another approach which is more suitable for combining the results of different experiments.

引用

页码：R9 / R12

页数：4

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