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DQG Physics Monitoring


Composite particles monitored in DQG Stripcharts

Particle & Decay Chain Luminosity (pb-1) List Used Fit Function HER/LER Monitoring?
pi0 -> gamma gamma - pi0Loose Novosibirsk Function yes
pi0 -> gamma gamma (with E(gamma) > 0.1 GeV) 1.0 pi0Loose Novosibirsk Function
phi -> K+ K- 3 phiTightPID Gaussian+Poly2 yes
Kshort -> pi+pi- 1.5 KsDefault Gaussian+Poly2 yes
eta -> gamma gamma 1000 etaggDefaultNoMass Gaussian+Poly2
eta -> pi+pi-pi0 1000 eta3piDefault Gaussian+Poly2
omega -> pi+pi-pi0 1000 omegaVeryLooseAndPid Gaussian+Poly2
D0 -> K-pi+ 3 D0ToKPiLoosePID Gaussian+Poly2 yes
D+ -> K+pi+pi- 50 DcToKPiPiLoose Gaussian+Poly2
D*0 -> D0 pi0 100 Dstar0(KPi)Loose Gaussian+Poly2 (deltaM)
D*0 -> D0gam 50 Dstar0(KPi)Loose Gaussian (deltaM)
D*+ -> D0pi+ 5 DstarChrgKLooseRS Gaussian+Poly2 (deltaM)
D*+ -> D+pi0 200 DstarToDcPi0KPiPiHardLoose Gaussian (deltaM)
J/psi -> e+ e- 1000 JPsiLooseEE Gaussian+Poly2
J/psi -> mu+ mu- 500 JPsiLooseMuMu Gaussian+Poly2
lambda -> p pi- 1.5 LambdaPID Gaussian+Poly2

Notes:

There are various cuts applied to the lists used, though I do not list them all here. The lists used and cuts applied are all defined in PhysMonModules/PhysMonHistoSequence.tcl

We also monitor S-to-B ratio for pi0, phi, and D+. In addition, there are stripcharts for raw track and neutral list yields for CT, GTVL, GTL, GPL, and merged pi0s, which can be interesting to look at, for example, when monitoring background levels.

We could also look at other decay modes, but need to keep in mind the luminosity requirements to get sensible fits. The particles monitored thus far are ones that we can get decent statistics from the number of events that we look at on a weekly basis. Even monitoring etas and omegas is stretching things a bit (weekly strip charts usually only show a few datapoints for these at the most). We could also consider monitoring other particles from the LER/HER, but these would require even more luminosity, of course.

Another thing to note is that we're not restricted to stripcharts but can of course also look at the mass distributions from these particle lists (with a little extra work). I've linked some examples below from data (for the DCH improvement comparison) and for MC.


Example Mass Distributions from data (before/after DCH code improvements)
compareDCH

Example Mass Distributions from SP8 MC (18.6.1a vs 18.6.1g)
generic MC
exclusive MC

Example Physics Stripcharts (All of Run5a data)
ER_Default_run5a_complete_ER.pdf

Example Physics Stripcharts (Something more typical from the weekly DQG checks.. from Run5b)
ER_Default_run5b_060320_ER.pdf

Talk with overview of DQG physics monitoring from Feb06 Collaboration Meeting:
orimoto.pdf



Page author(s): Carlos A. Chavez , Toyoko Orimoto
Last significant update: 21-08-2006 Expiry date: 21-08-2007