Direct measurements of the non-DD cross section {sigma}{sub {psi}}{sub (3770){yields}}{sub non-DD} at E{sub cm}=3.773 GeV and the branching fraction for {psi}(3770){yields}non-DD

Journal Article · Sat Dec 15 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.122002· OSTI ID:21023991

Ablikim, M; Bai, J Z; Cai, X; Chen, H S; Chen, H X; Chen, J C; Chen, Jin; Chen, Y B; Chu, Y P; Deng, Z Y; Du, S X; Fang, J; Fang, S S; Gao, C S; Gu, S D; Guo, Y N; He, K L; Heng, Y K; Hu, H M; Hu, T ^[1]

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1. Institute of High Energy Physics, Beijing 100049 (China)

By analyzing the data collected at the center-of-mass energy E{sub cm}=3.773 GeV and below the DD meson pair production threshold with the BES-II detector at the BEPC Collider, we directly measured the observed non-DD cross section of {psi}(3770) decay to be {sigma}{sub {psi}}{sub (3770){yields}}{sub non-DD}{sup obs}=(0.95{+-}0.35{+-}0.29) nb at E{sub cm}=3.773 GeV, and the branching fraction BF[{psi}(3770){yields}non-DD]=(13.4{+-}5.0{+-}3.6)% for inclusive non-DD decay of {psi}(3770). We also determined the cross section for DD meson pair production to be {sigma}{sub DD}{sup obs}=(6.12{+-}0.37{+-}0.23) nb at E{sub cm}=3.773 GeV.

• OSTI ID: 21023991
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
CROSS SECTIONS
D MESONS
ELECTRON-POSITRON INTERACTIONS
GEV RANGE
MULTIPARTICLE SPECTROMETERS
PAIR PRODUCTION
PARTICLE IDENTIFICATION
PSI-3770 MESONS