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Thanks, yes… I think MC can help, but unless the MC ECal has the same misalignments as in data, it’s not a perfect test. I’m not quite sure what to do about that except to get the ECal alignment into the data as well as possible. Pretty much anything we do with triggered data can have such effects - so maybe FEE tracks from pulser data? Something to keep thinking about. Tim > On Nov 17, 2017, at 3:15 PM, Graf, Norman A. <[log in to unmask]> wrote: > > Good question Tim. I'll take a look at the Møller MC and see if that sheds any light on this. > > > > From: Nelson, Timothy Knight > Sent: Friday, November 17, 2017 2:51 PM > To: Graf, Norman A. > Cc: Rafayel Paremuzyan; [log in to unmask]; hps-software > Subject: Re: [Hps-analysis] test pass 7d > > Hi Norman, > > Thanks for being really on top of this. > > It’s not a question for today, but on the momenta: do we really even know that we expect the x and y momenta to be centered on zero given ECal acceptance and alignment effects? This has been on my mind a fair bit w.r.t. trying to pin down large scale SVT alignments. > > Cheers, > Tim > > > On Nov 17, 2017, at 2:17 PM, Graf, Norman A. <[log in to unmask]> wrote: > > > > Dear Colleagues, > > I've posted the results of my first, quick analysis of the tpass7d output to the #project-2015pass7 channel on Slack: https://heavyphotonsearch.slack.com/messages/C5FCT7161/ . So far I have only analyzed the Møller skim from run 5772. > > Preliminary conclusions are: > > > > Unconstrained vertex position reconstruction consistent with beamspot centered at (0,0) and a target at z=0.5mm. > > > > Unconstrained vertex momenta show only very small deviations of beam from z axis. > > > > Uniformity of mass calculated from the three vertex collections (Unconstrained, BeamspotConstrained and TargetConstrained) confirms the internal consistency of locating the target at z=0.5mm. > > > > TargetConstrained Møller mass (from a simple Gaussian fit) is > > > > m=0.033276±0.000003 > > > > TargetConstrained Møller mass resolution (from a simple Gaussian fit) is > > > > sigma=1.4633E-3 ± 3.0E-6 > > > > So far, so good. > > > > Norman > > > > > > Use REPLY-ALL to reply to list > > To unsubscribe from the HPS-SOFTWARE list, click the following link: > > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the HPS-SOFTWARE list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1