LAMBDA(LAMBDA)OVER-BAR-PRODUCTION, LAMBDA (LAMBDA)OVER-BAR-GAMMA-PRODUCTION AND LAMBDA(LAMBDA)OVER-BAR-PI(0)-PRODUCTION IN J PSI-DECAY/

Authors
BAI JZ BIAN JG CHAI ZW CHEN GP CHEN HF CHEN JC CHEN SM CHEN YQ CHEN Y CHEN YB CHENG BS CUI XZ DING HL DU ZZ FAN XL FANG J GAO CS GAO ML GAO SQ GU JH GU SD GU WX GU YF GUO YA HAN SW HAN Y HE JT HE J HE M HU GY HU JL HU QH HU T HU XQ HUANG XP HUANG YZ JIANG CH JIN S JIN Y KANG SH KE ZJ LAI YF LAN HB LANG PF LI J LI PQ LI Q LI RB LI W LI WD LI WG LI XH LI XN LIN SZ LIU HM LIU J LIU JH LIU Q LIU RG LIU Y LIU ZA LU F LU JG LU JY LUO SQ LUO Y MA AM MA EC MA JM MAO HS MAO ZP MENG XC NI HL NIE J QI ND QIU JF QU YH QUE YK RONG G SHAO YY SHEN BW SHEN DL SHEN H SHEN XY SHENG HY SHI HZ SONG XF SUN F SUN HS SUN SJ TAN YP TANG SQ TONG GL WANG F WANG JF WANG LS WANG LZ WANG M WANG M WANG PL WANG P WANG SM WANG TJ WANG YY WEI CL WU YG XI DM XIA XM XIE PP XIONG WJ XU GF XU RS XU ZJ XUE ST YAN J YAN WG YANG CY YANG CM YANG J YANG XF YE MH YE SZ YE SW YI K YU CS YU CX YU ZT YU ZQ YUAN CZ ZHANG BY ZHANG CC ZHANG DH ZHANG DH ZHANG HL ZHANG J ZHANG JW ZHANG L ZHANG LS ZHANG QJ ZHANG SQ ZHANG XY ZHANG Y ZHANG YY ZHAO DX ZHAO HW ZHAO JW ZHAO M ZHAO WR ZHAO WH ZHENG JP ZHENG LS ZHENG ZP ZHOU GP ZHOU HS ZHOU L ZHOU YH ZHU QM ZHU YC ZHU YS ZHUANG BA
Citation
Jz. Bai et al., LAMBDA(LAMBDA)OVER-BAR-PRODUCTION, LAMBDA (LAMBDA)OVER-BAR-GAMMA-PRODUCTION AND LAMBDA(LAMBDA)OVER-BAR-PI(0)-PRODUCTION IN J PSI-DECAY/, Gaoneng wuli yu he wuli, 22(2), 1998, pp. 97-105
Citations number
8
Categorie Soggetti
Physics, Particles & Fields","Physics, Nuclear
Journal title
Gaoneng wuli yu he wuli → ACNP
ISSN journal
02543052
Volume
22
Issue
2
Year of publication
1998
Pages
97 - 105
Database
ISI
SICI code
0254-3052(1998)22:2<97:LL(>2.0.ZU;2-H
Abstract
The channels of J/psi decay into lambda(lambda)over-bar, lambda(lambda )over-bar-gamma and lambda(lambda)over-bar-pi(0) are analyzed with 7.8 x 10(6) J/psi events collected by BES detector at BEPC Collider. The branching ratios for three channels and the angular distribution for t he first channel are measured. The branching ratios are Br (J/psi --> lambda(lambda)over-bar) = (1.08 +/- 0.06 +/- 0.24) x 10(-3), Br (J/psi --> lambda(lambda)over-bar-gamma) < 1.6 x 10(-4)(90% CL) and Br (J/ps i --> lambda(lambda)over-bar>pi(0)) = (2.3 +/- 0.7 +/- 0.8) x 10(-4) r espectively. The angular distribution for J/psi --> lambda(lambda)over -bar is dN/dcos theta = N-0 (1 + alpha cos(2) theta)alpha cos2 theta), alpha = 0.52 +/- 0.33 +/- 0.13.