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Charmonium Hybrid Production in exclusive B-decays

Charmonium Hybrid Production in exclusive B-decays. Frank Close + Stephen Godfrey. Spectroscopy Decay Production Signatures. Phys Lett B574 (2003) 210. 2. ( cc*). Spectroscopy. DD** 4280. DD* 3870. DD 3730. 3686. 2S: 1-. 3556. 2+. 3510. 1+. 3415.

dorothy-nicholson
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Charmonium Hybrid Production in exclusive B-decays

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  1. Charmonium Hybrid Production in exclusive B-decays Frank Close + Stephen Godfrey Spectroscopy Decay Production Signatures Phys Lett B574 (2003) 210

  2. 2 (cc*) Spectroscopy DD** 4280 DD* 3870 DD 3730 3686 2S: 1- 3556 2+ 3510 1+ 3415 0+ 3097 1S: 1-

  3. 3 (cc*) Hybrid Spectroscopy Quenched Lattice 1^{-+} 4.43 \pm 0.04 DD** 4280 Lattice 1^{-+} 4.04-4.4 DD* 3870 Flux tube 4.0 – 4.2 DD 3730 3686 2S: 1- 3556 2+ 3510 1+ 3415 0+ 3097 1S: 1-

  4. 4 Decays (cc*) Hybrid DD** =O(10) MeV DD** 4280 DD*; not DD; not D*D* DD* 3870 Cascade tocc*+ pions, omega, gamma DD 3730 3686 2S: 1- 3556 2+ 3510 1+ 3415 0+ Light hadrons 3097 1S: 1-

  5. 5 (cc*) Hybrid Production c c* Factorisation: cc* = 0-,1-,1+ b s K B Expt: also 0+,2+ rate like 1-,1+ ! Color octet contributions big

  6. 6 (cc*) Hybrid Production c c* Factorisation: cc* = 0-,1-,1+ b s K B Expt: also 0+,2+ rate like 1-,1+ ! Color octet contributions big Octet higher order v/c But larger Wilson coeffs. Leading behaviour for hybrids

  7. 7 (cc*) Hybrid Production c c* Estimates of rates b s K B Chiladze Falk Petrov 98 M = 4GeV but Lattice =4.7GeV reduces rate. Close Dunietz Page Veseli Yamamoto 98 = similar to conventional charmonium

  8. 8 Effect of DD** threshold

  9. 9 (cc*) Hybrid Signatures -1 Events/100fb M< DD** M>DD** 50 6 5 120 3 10 Width 1 keV. Monochromatic Also seek cc* BaBar measures so accessible

  10. 10 Mass distributions of light hadrons Decays to charmed hadrons Critical for Anomalous modes: no DD, no D*D* some DD* prominent DD**

  11. 11 Mass distributions of light hadrons Decays to charmed hadrons K(*) momentum spectrum Excess low mom K(*) recoil against 4-4.5 GeV hybrid

  12. 12 (cc*) Hybrid Backgrounds cc* with similar M and narrow widths

  13. 13 Hybrid Charmonium Production rates from B similar cc* 0.1-1% Relatively narrow Distinctive final states Observable branching ratios

  14. Mass distributions of light hadrons; e.g. Belle see

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