PFA on SiDaug05_np Lei Xia ANL-HEP. PFA outline Calibration of calorimeter –Done –Not tuned for clustering algorithm Clustering algorithm –Done: hit density.

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Presentation transcript:

PFA on SiDaug05_np Lei Xia ANL-HEP

PFA outline Calibration of calorimeter –Done –Not tuned for clustering algorithm Clustering algorithm –Done: hit density driven clustering –Not tuned with PFA performance Clustering ID –Not done: cheating with MC information –Basically just need to distinguish EM and HAD showers –Identify shower fragments and merged showers would be a plus Track finding algorithm –Not done: cheating with MC information –Applied some quality cut (tight/loose) Track-cluster matching –Done: ‘ helix-swim ’ extrapolation, min(hit,track) –Not tuned with PFA performance Jet algorithm –Not included yet –Only studied Z-pole -> qqbar (uds) events Detector mode –SiDaug05_np Si tracker, Si/W EM calorimeter, RPC DHCAL non-projective

Calorimeter calibration: sidaug05_np EM showers E = 82.5 x E(em,raw) x N(hadhits) Hadron showers GeV E (GeV) (σ/M)x √E GeV E (GeV) (σ/M)x √E KL0KL0KL0KL0 neutron GeV E (GeV) (σ/M)x √E Anti-neutron

Calorimeter calibration: SiDmay05 EM showers E = 82.5 x E(em,raw) x N(hadhits) Hadron showers photon(GeV) (σ/M)x √E GeV (σ/M)x √E GeV (σ/M)x √E KL0KL0KL0KL0 neutron

Hit efficiency SiDaug05_np: single particle Particle ECal hit efficiency HCal hit efficiency Overall hit efficiency Pion (2 GeV) 75%57%73% Pion (5 GeV) 80%69%77% Pion (10GeV) 83%80%82% Pion (20GeV) 85%87% All numbers are for one main cluster (no other fragments are included)

Hit efficiency SiDmay05: single particle Particle ECal hit efficiency HCal hit efficiency Overall hit efficiency Overall energy efficiency Photon (1GeV) 89%43%89%91% Photon (5GeV) 92%54%92%96% Photon (10GeV) 92%61%92%97% Photon ( 100GeV ) 95%82%95%>99% Pion (2 GeV) 78%59%75%71% Pion (5 GeV) 81%70%79%80% Pion (10GeV) 84%80%83%85% Pion (20GeV) 85%87%88%91% Typical electron cluster energy resolution ~ 21%/sqrt(E) Typical pion cluster energy resolution ~70%/sqrt(E) All numbers are for one main cluster (no other fragments are included)

Total event energy SiDaug05_np: Z pole (uds) All 10k events: 4.73 GeV 71% 10.2 GeV 29% Events with E(leak) < 1GeV 4.47 GeV 69% 9.76 GeV 31% Note: no parameters are tuned yet! Two main source of error: 1. neutrals taken as charged (clustering, track association) 2. charged fragments are taken as neutrals

Total event energy SiDmay05: Z pole (uds) All 7k events: 4.73 GeV 70% 9.15 GeV 30% Events with E(leak) < 1GeV 4.53 GeV 68% 8.85 GeV 32% Note: no parameters are tuned yet! Two main source of error: 1. neutrals taken as charged (clustering, track association) 2. charged fragments are taken as neutrals

Perfect PFA SiDaug05_np: Z pole (uds) All 10k events: 2.85 GeV 81% 6.78 GeV 19%