Observation of {chi}{sub c1} Decays into Vector Meson Pairs {phi}{phi}, {omega}{omega}, and {omega}{phi}

Journal Article · Fri Aug 26 00:00:00 EDT 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.107.092001· OSTI ID:21611584

Ablikim, M; An, Z H; Bai, J Z; Berger, N; Bian, J M; Cai, X; Cao, G F; Cao, X X; Chang, J F; Chen, G; Chen, H S; Chen, J C; Chen, M L; Chen, Y; Chen, Y B; Chu, Y P; Dai, H L; Dai, J P; Deng, Z Y; Dong, L Y ^[1]

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

Using (106{+-}4)x10{sup 6} {psi}(3686) events accumulated with the BESIII detector at the BEPCII e{sup +}e{sup -} collider, we present the first measurement of decays of {chi}{sub c1} to vector meson pairs {phi}{phi}, {omega}{omega}, and {omega}{phi}. The branching fractions are measured to be (4.4{+-}0.3{+-}0.5)x10{sup -4}, (6.0{+-}0.3{+-}0.7)x10{sup -4}, and (2.2{+-}0.6{+-}0.2)x10{sup -5}, for {chi}{sub c1}{yields}{phi}{phi}, {omega}{omega}, and {omega}{phi}, respectively, which indicates that the hadron helicity selection rule is significantly violated in {chi}{sub cJ} decays. In addition, the measurement of {chi}{sub cJ}{yields}{omega}{phi} provides the first indication of the rate of doubly OZI-suppressed {chi}{sub cJ} decay. Finally, we present improved measurements for the branching fractions of {chi}{sub c0} and {chi}{sub c2} to vector meson pairs.

• OSTI ID: 21611584
• Journal Information: Physical Review Letters, Vol. 107, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.107.092001; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
HELICITY
OMEGA-1420 MESONS
OMEGA-1600 MESONS
OMEGA-782 MESONS
PAIR PRODUCTION
PARTICLE DECAY
PHI-1020 MESONS
PHI-1680 MESONS
PHI3-1850 MESONS
SELECTION RULES
BOSONS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
HADRONS
INTERACTIONS
MESONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PHI MESONS
TENSOR MESONS
VECTOR MESONS