Chengping Shen shencp@phys.hawaii

1. Check MC samples produced at MN and topology Chengping Shen shencp@phys.hawaii.edu Phys. Dept., University of Hawaii

2. Using Ψ(2S)→γηc, ηc→ηπ+π-as example to check General selection: Good charged tracks select: Vr < 1.0cm, |Vz|<5.0cm, |cosθ|<0.93 Good photon select: Eraw >= 40MeV, Ntrk=2 andΣQ=0 PID: pi:Prob(K) <Prob(pi) 4C Kinematic Fit, looping over all good photon candidates, select the combination with the minimum χ2.

3. (b) (a) (a): After kinematic fit (b): After kinematic fit and PID requirements The gamma gamma distributions seem strange!

4. BOSS6.3.3 • BOSS6.3.3 nightly_build has been released. Now we could do simulation, • reconstruction at IHEP server. jobOption:TestRelease/run(TestRelease-00-00-30) Environment setup:/afs/ihep.ac.cn/bes3/offline/sw/dist/boss/cmthome/ cmthome-nightly_build 2. The change is large, including generator, simulation, reconstruction, but such change is good: jobOptions files have been simplified. 3. Notice: the writing format for event selection has been changed largely(haixuan told me). We need to wait for see the RhoPi example for BOSS6.3.3

5. Event Topology You must output the “run” and “rec” into your ntp file. Then run the root program: anytopo.cxx

6. ===============================Decay Channel: No. 19===============================run number: -10081event number: 128track number: 28itype number: 36780-------------------------------3 443 J/psi 3.09693 4 3 914 -20213 a_1- 1.23 5 4 4435 10211 a_0+ 1.474 6 4 4436 111 pi0 0.134976 7 4 4437 211 pi+ 0.13957 8 6 102118 221 eta 0.54751 9 6 102119 111 pi0 0.134976 10 9 22110 111 pi0 0.134976 11 9 22111 111 pi0 0.134976 12 9 22112 22 gamma 2.6974e-09 13 12 11113 22 gamma 0 14 12 11114 22 gamma 0 15 11 11115 22 gamma 8.25906e-10 16 11 11116 22 gamma 6.7435e-10 17 10 11117 22 gamma 1.26159e-09 18 10 11118 22 gamma nan 19 7 11119 22 gamma 0 20 7 11120 111 pi0 0.134976 21 5 -2021321 -213 rho- 0.7758 22 5 -2021322 111 pi0 0.134976 23 22 -21323 -211 pi- 0.13957 24 22 -21324 22 gamma nan 25 23 11125 22 gamma 9.53674e-10 26 23 11126 22 gamma nan 27 21 11127 22 gamma nan 28 21 111 ===============================Decay Channel: No. 1===============================run number: -10081event number: 3track number: 18itype number: 35240-------------------------------3 443 J/psi 3.09725 4 3 914 -311 anti-K0 0.497672 5 4 4435 111 pi0 0.134976 6 4 4436 313 K*0 0.896 7 4 4437 310 K_S0 0.497672 8 5 -3118 111 pi0 0.134976 9 8 3109 111 pi0 0.134976 10 8 31010 22 gamma 2.00895e-09 11 9 11111 22 gamma 2.45467e-09 12 9 11112 22 gamma 5.3948e-09 13 10 11113 22 gamma nan 14 10 11114 321 K+ 0.493677 15 7 31315 -211 pi- 0.13957 16 7 31316 22 gamma 7.62939e-09 17 6 11117 22 gamma 1.90735e-09 18 6 111 topo.mess