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A few words on a proposed LoI : charmed baryon production with CLAS12

A few words on a proposed LoI : charmed baryon production with CLAS12. Phil Cole Idaho State University May 2, 2011. ISSUES *. Want low-Q 2 for “virtual-real” photons Need MC simulations for “bread-and-butter” charmed baryon resonances hidden charm N* s and Λ * s

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A few words on a proposed LoI : charmed baryon production with CLAS12

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  1. A few words on a proposed LoI: charmed baryon production with CLAS12 Phil Cole Idaho State University May 2, 2011

  2. ISSUES* • Want low-Q2 for “virtual-real” photons • Need MC simulations for • “bread-and-butter” charmed baryon resonances • hidden charm N*s and Λ*s • The reaction: γpDoYc or D±Yc • Dom=1865 MeV and I(Jp) =½(0-) • D±m=1870 MeV and I(Jp) =½(0-) • At 11 GeV, √s ≈ 4.64 GeV for γp • Hence 4640 MeV – 1870 MeV = 2770 MeV *(Bing-Song Zou and Qiang Zhao will be at NSTAR 2011 and the PWA workshop at GWU).

  3. Basic ideas for “bread and butter” physics Measure JP for regular charmed resonances • Either not been well measured (Λc(2286)+) • Or not measured at all (assigned via Quark Model) • Λc(2595)+, Λc(2625)+, Λc(2880)+ , Λc(2940)+ • Σc(2455), Σc(2520), Σc(2800) • Ξc(2468)+, Ξc(2471)0, • etc (see PDG)

  4. Hidden CharmBing-Song Zou and Jia-Jun Wu See also: Prediction of narrow N* and Λ* resonances with hidden charm above 4 GeV arXiv:1007.0573v1 [nucl-th] 4 Jul 2010

  5. Total cross section vsPlab

  6. Path Forward • Monte Carlo simulations • at lowest Q2 • range of Q2 • event generator (signal + background) • Involve Bing-Song Zou and Jia-Jun Wu ASAP • Travel grant money from DOE for working on this component of the LoI at IHEP-Beijing. • Discuss this with Bjorken and Brodsky

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