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Update on Rare η Decays

Update on Rare η Decays. Liping Gan University of North Carolina Wilmington. World competition in Rare η Decays. Low energy - facilities. High energy - facility. CBELSA/TAPS at ELSA. JEF at Jlab. Filter Background with η Energy Boost. Other competitors (CB, KLOE, BES-III,

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Update on Rare η Decays

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  1. Update on Rare η Decays Liping Gan University of North Carolina Wilmington

  2. World competition in Rare η Decays Low energy -facilities High energy -facility CBELSA/TAPS at ELSA JEF at Jlab

  3. Filter Background with η Energy Boost Other competitors (CB, KLOE, BES-III, WASA, C-Barrel) : lowenergy η production Jlab: high energy η production (E =9-11.7 GeV) Signal: 0 η →000 • Note: • Statistics is normalized to 1 • beam day. • BG will be further reduced by • requiring only one pair of ’s • to have the 0 invariant mass. S. Prakhov et al.Phy.Rev.,C78,015206 (2008)

  4. Our Plan • Submit a proposal to PAC40 in May 2013. • Work with theorists to strengthen the physics case. • Establish collaborations with Chinese institutes for FCAL-II upgrade. • We are also in process to contact people in the Panda collaboration to establish possible collaboration for the calorimeter development. • Implement PbWO4 crystal in the standard GlueX montecarlo simulation.

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