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Bs DsK

Bs DsK. Additional Mode. Look at D s KK pp 0 BF(D s KK pp 0 ) ~ BF(D s KK p ) Liming looked at briefly a while back, low eff, found bugs in offlineVertexFitter. In light of new HLT2 topological trigger, these may come in for “free” Four-track vertex, just like Bs DsK, DsKK p

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Bs DsK

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  1. BsDsK

  2. Additional Mode • Look at DsKKpp0 • BF(DsKKpp0) ~ BF(DsKKp) • Liming looked at briefly a while back, low eff, found bugs in offlineVertexFitter. • In light of new HLT2 topological trigger, these may come in for “free” • Four-track vertex, just like BsDsK, DsKKp • New MC event sample from Liming with ~1/3 phi rho, ~1/3 K*K*, and 1/3 nonresonant. Offline analysis, using very similar cuts to DsKKp, + pT(p0)>500 MeV

  3. Mass Plots No pi0 mass constraint With pi0 mass constraint s~60 MeV (Really double Gaussian, with core ~ 20 MeV) s~100 MeV e ~ 0.45*e(Ds->KKp) s~15 MeV for DsKKp

  4. Some more mass distributions Topologicaltriggersuggests cutting at 4 GeV

  5. Aside: Toy MC of Bs Mass Dist

  6. Summary • DsKKpp0 looks promising • Need to check inclusive-b & other back.

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