Observation of {psi}(3770){yields}{gamma}{chi}{sub c1}{yields}{gamma}{gamma}J/{psi}

Journal Article · Fri May 12 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.182002· OSTI ID:20775236

Coan, T E; Gao, Y S; Liu, F ^[1]; Artuso, M; Boulahouache, C; Blusk, S; Butt, J; Dorjkhaidav, O; Li, J; Menaa, N; Mountain, R; Nandakumar, R; Randrianarivony, K; Redjimi, R; Sia, R; Skwarnicki, T; Stone, S; Wang, J C; Zhang, K ^[2]; Csorna, S E ^[3]

---

1. Southern Methodist University, Dallas, Texas 75275 (United States)
2. Syracuse University, Syracuse, New York 13244 (United States)
3. Vanderbilt University, Nashville, Tennessee 37235 (United States)

From e{sup +}e{sup -} collision data acquired with the CLEO detector at the Cornell Electron Storage Ring, we observe the non-DD decay {psi}(3770){yields}{gamma}{chi}{sub c1} with a statistical significance of 6.6 standard deviations, using the two-photon cascades to J/{psi} and J/{psi}{yields}l{sup +}l{sup -}. We determine {sigma}(e{sup +}e{sup -}{yields}{psi}(3770))xB({psi}(3770){yields}{gamma}{chi}{sub c1})=(18.0{+-}3.3= {+-}2.5) pb and branching fraction B({psi}(3770){yields}{gamma}{chi}{sub c1})=(2.8{+-}0.5{+-}0.4)x10{sup -3}. We set 90% C.L. upper limits for the transition to {chi}{sub c2} ({chi}{sub c0}): {sigma}xB<5.7 pb (<282 pb) and B<0.9x10{sup -3} (<44x10{sup -3}). We also determine {gamma}({psi}(3770){yields}{gamma}{chi}{sub c1})/{gamma}({psi}(3770){yields}{pi}{sup +}{pi}{sup -}J/= {psi})=1.5{+-}0.3{+-}0.3 (>1.0 at 90% C.L.), which bears upon the interpretation of X(3872)

• OSTI ID: 20775236
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 96; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BRANCHING RATIO
CESR STORAGE RING
D MESONS
ELECTRON-POSITRON COLLISIONS
ELECTRONS
INCLUSIVE INTERACTIONS
J PSI-3097 MESONS
MULTIPARTICLE SPECTROMETERS
PARTICLE DECAY
PARTICLE IDENTIFICATION
PHOTONS
PIONS MINUS
PIONS PLUS
POSITRONS
PSI-3770 MESONS