Charmonium and CharmSpectroscopyat the e+e- B-Factories.ppt

Charmonium and Charm Spectroscopy at the e+e- B-Factories FPCP 2006, Vancouver April 10, 2006 Helmut Marsiske, SLAC Outline Charmonium-candidate States X(3872), X(3940), Y(3940) Y(4260), Z(3930) Charmed-strange Mesons DsJ*(2317), DsJ(2460) Charmed Baryons Λc(2940), Ξcx(2980), Ξcx(3077) No (charmed) Pentaquarks @ B-factories Tetraquarks, D*D molecules, ccg hybrids, etc. Note Microsoft convention: underline ? overbar Charm/onium Productionat BABAR, Belle, and CLEO Continuum production: √s ≤ 10.58 GeV e+e-?cc (ISR, double charmonium) two-photon Production in B decay: √s ≈ 5.28 GeV b?c transition B?(cc)K(*) Very large data samples 450-700M cc events, 380-590M BB events Detectors with excellent tracking, vertexing, e.m. calorimetry, and particle ID Belle: 275M BB hep-ex/0505038 X(3872)??+?-J/? Observed in B-decay Belle: 152M BB PRL 91, 262001 (2003) BABAR: 232M BB PRD 73, 011101 (2006) B± and B0 N=49.1±8.4 N=61.2±15.3 (6.1 σ) Solid hist.: mES sidebands B± only Inclusive Search for B?K X(3872) BB sample with one B fully reconstructed Two-body decay of other B ? monochromatic line in the kaon momentum spectrum in the B-meson center-of-mass (CM) frame BABAR: 232M BB PRL 96, 052002 (2006) No charged X(3872) observed X(3872)??J/? ? C(X)=+1 BABAR: 287M BB Preliminary Belle: 275M BB hep-ex/0505037 N=19.4±5.7 (3.4 σ) N=13.6±4.4 (4.0 σ) #B’s in 64MeV bins of M(?J/?) S=1.3 ?+?- Invariant Mass Spectrumin X(3872)??+?-J/? C(X)=+1 ? IG(JPC)[?+?-] = 1+(1--) ? ?0 Expect ?+?- invariant mass spectrum to