Minutes of the Muon Software Meeting September 15, 2004 1. Victoria (of behalf on Michael) : New histograms for muon DQM ================================================================== Victoria reviewed the to do list from last week's offline muon validation meeting. As a follow up to this, Michael has selected histograms from his MuonValidationModule he'd like to add to the MuonDqmModule. Comments on the proposed histograms: * Average number of hits per stub in each wedge. Regis believes that this information is already being monitored. * Noise histogram. Phil: the implementation of this histogram needs more thought. Normally 4 neighboring channels ossilate together. The real question we have to answer is how big is the hot region, and what size of hot region is unacceptable. * Instead of number of CMU muons per events (and similar, separate histograms for CMP, CMX, BMU), that we have one overall histograms with one bin for CMU, one for CMP, one for CMX and one for BMU. * We want to remove the z, delta-Z and delta-phi distributions. Regis explained the comparisons between the reference run and current run we can make are: * bin-by-bin comparison * compare mean and rms * For Em and Had histograms, the shape is fit to a Landau convoluted with a Gaussian. The parameters of the fit are compared to the reference run. Discussion points: * Runs we've already marked bad or good. The DQM group would like to rerun the new MuonDQM module on the old runs. Phil said that if a run is marked bad it probably is bad; the new DQM scheme will probably not change our previous decisions. * DQM for the BMU. Camille needs to see the data for an average run before she can work out whether we need to use the BMU triggers. She'd prefer not to add the BMU triggers. * Reference run. We have to choose a better one if we want it. There has only been 3 reference runs to date. As some of our histograms will change with triggers, we should request a new reference run if it is necessary. * When is a run marked bad. We still need to define cuts for this. We will wait until we have agreed on the histograms. * Who is responsible for looking at the runs flagged bad, and communicating with the DQM group. Victoria said that it's part of the Northwestern MOU, so Michael is going to appoint someone to do this. Lucio said that the subdetector experts need to look at the histograms. Regis strongly encouraged everyone to look at the DQM web page: http://www-cdf.fnal.gov/internal/dqm/dqm.html and especially the pending issues page: http://www-cdf.fnal.gov/internal/dqm/fy04_pending.txt Muons are the only people with pending issues. 2. Slava: Miniskirt trigger efficiency Slava has calculated the trigger efficiency for the miniskirt. As a reminder, only wedges 16 to 19 of the miniskirt are triggerable. The overall efficiency for the East side is around 70%, but about 0% on the West side. After some investigation it was found that the timing of the CSX in the miniskirt is wrong as the cables to the miniskirt are a different length than to the arches. This problem effects both the East and West sides. Eric and Phil discussed the best way to fix this problem. Phil hopes that they can fix the cable length in the hall. If not, Eric can change it directly on the trigger boards. Victoria proposed that we change the miniskirt good run start number until after the present shutdown. So if people are using the CMX trigger, they should not use the triggers from the miniskirt. The miniskirt muon that are independent of the trigger are fine to use. I think everyone agreed with this policy. One follow-up item for Phil is to recover the CMX runs that were marked bad due only to the miniskirt. They can now become good CMX runs. 3. Woo-Hyun : BMU muons ============================================ Woo-Hyun has used Z->mu+mu- events using CMUP18 and CMX18 triggers to look at BMU muons. He made a first calculation of the sigma.BR(Z->mu+mu-) where one of the muons is BMU. ~1700 events, Acceptance = 0.0433. The cross section he calculates agrees with our published value. He is going to continue to look at these BMU muons to propose cuts for the tracks attached to BMU muons.