FIRST OBSERVATION OF THE DECAY XI(+)(C)-]XI(0)E+NU(E) AND AN ESTIMATE OF THE XI(+)(C)/XI(0)(C) LIFETIME RATIO

被引：22

作者：

ALEXANDER, JP

BEBEK, C

BERKELMAN, K

BLOOM, K

BROWDER, TE

CASSEL, DG

CHO, HA

COFFMAN, DM

CROWCROFT, DS

DRELL, PS

DUMAS, D

EHRLICH, R

GAIDAREV, P

GARCIASCIVERES, M

GEISER, B

GITTELMAN, B

GRAY, SW

HARTILL, DL

HELTSLEY, BK

HENDERSON, S

JONES, CD

JONES, SL

KANDASWAMY, J

KATAYAMA, N

KIM, PC

KREINICK, DL

LUDWIG, GS

MASUI, J

MEVISSEN, J

MISTRY, NB

NG, CR

NORDBERG, E

PATTERSON, JR

PETERSON, D

RILEY, D

SALMAN, S

SAPPER, M

WURTHWEIN, F

AVERY, P

FREYBERGER, A

RODRIGUEZ, J

YANG, S

YELTON, J

CINABRO, D

LIU, T

SAULNIER, H

WILSON, R

YAMAMOTO, H

BERGFELD, T

EISENSTEIN, BI

机构：

[1] UNIV HAWAII MANOA,HONOLULU,HI 96801

[2] INP,NOVOSIBIRSK,RUSSIA

[3] CORNELL UNIV,ITHACA,NY 14853

[4] UNIV FLORIDA,GAINESVILLE,FL 32611

[5] HARVARD UNIV,CAMBRIDGE,MA 02138

[6] UNIV ILLINOIS,CHAMPAIGN,IL 61801

[7] CARLETON UNIV,INST PARTICLE PHYS,OTTAWA,ON K1S 5B6,CANADA

[8] MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA

[9] ITHACA COLL,ITHACA,NY 14850

[10] UNIV KANSAS,LAWRENCE,KS 66045

[11] UNIV MINNESOTA,MINNEAPOLIS,MN 55455

[12] SUNY ALBANY,ALBANY,NY 12222

[13] OHIO STATE UNIV,COLUMBUS,OH 43210

[14] UNIV OKLAHOMA,NORMAN,OK 73019

[15] PURDUE UNIV,W LAFAYETTE,IN 47907

[16] UNIV ROCHESTER,ROCHESTER,NY 14627

[17] SO METHODIST UNIV,DALLAS,TX 75275

[18] SYRACUSE UNIV,SYRACUSE,NY 13244

[19] VANDERBILT UNIV,NASHVILLE,TN 37235

[20] VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061

[21] CALTECH,PASADENA,CA 91125

[22] UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093

[23] UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106

[24] UNIV COLORADO,BOULDER,CO 80309

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.74.3113

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using the CLEO II detector at the Cornell Electron Storage Ring we have observed the decay modes c+0e+e and c0-e+e by the detection of a -positron pair of appropriate invariant mass. We find B(c+0e+e)(e+e-c+X)=1.550.330.25 pb, B(c0-e+e)(e+e-c0X)=0.630.120.10 pb, B(c+-++)/B(c+0e+e)=0.440.11-0.06+0.11, and B(c0-+)/B(c0-e+e)=0.320.10-0.03+0.05. Assuming the c+ and c0 are equally produced in e+e- annihilation events at 10 GeV, the lifetime ratio of c+/c0 is measured to be 2.460.70-0.23+0.33. © 1995 The American Physical Society.

引用

页码：3113 / 3117

页数：5

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