Observation of the decay Ξ0→Σ+e-(ν)over-bar-e

被引：24
|
作者：
Affolder, A
Alavi-Harati, A
Albuquerque, IF
Alexopoulos, T
Arenton, M
Arisaka, K
Averitte, S
Barker, AR
Bellantoni, L
Bellavance, A
Belz, J
Ben-David, R
Bergman, DR
Blucher, E
Bock, GJ
Bown, C
Bright, S
Cheu, E
Childress, S
Coleman, R
Corcoran, MD
Corti, G
Cox, B
Crisler, MB
Erwin, AR
Ford, R
Golossanov, A
Graham, G
Graham, J
Hagan, K
Halkiadakis, E
Hanagaki, K
Hidaka, S
Hsiung, YB
Jejer, V
Jennings, J
Jensen, DA
Kessler, R
Kobrak, HGE
LaDue, J
Lath, A
Ledovskoy, A
McBride, PL
McManus, AP
Mikelsons, P
Monnier, E
Nakaya, T
Nauenberg, U
Nelson, KS
Nguyen, H
机构：
[1] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA
[2] Univ Arizona, Tucson, AZ 85721 USA
[3] Univ Calif Los Angeles, Los Angeles, CA 90095 USA
[4] Univ Calif San Diego, La Jolla, CA 92093 USA
[5] Univ Colorado, Boulder, CO 80309 USA
[6] Elmhurst Coll, Elmhurst, IL 60126 USA
[7] Fermi Natl Accelerator Lab, Batavia, IL 60510 USA
[8] Osaka Univ, Toyonaka, Osaka 560, Japan
[9] Rice Univ, Houston, TX 77005 USA
[10] Rutgers State Univ, Piscataway, NJ 08855 USA
[11] Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA
[12] Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22901 USA
[13] Univ Wisconsin, Madison, WI 53706 USA
来源：
PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.82.3751
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We present the first observation of Xi(0) beta decay, using the KTeV beam line and detector at Fermilab. We have identified 176 beta decay events after subtracting a 7 event background. Normalization to 41024 simultaneously collected Xi(0) --> Lambda(0)pi(0) decays yields a branching ratio of Gamma(Xi(0) --> Sigma(+) e(-)<(nu)over bar>(e))/Gamma(total) = (2.71 +/- 0.22(statistical) +/- 0.31(systematic)) X 10(-4). The flavor symmetric quark model calculation agrees with this result.
引用
收藏
页码：3751 / 3754
页数：4
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