[Hps-analysis] HPS Analysis Meeting December 11 @ 9am/noon PST/EST

Wed Dec 12 15:56:12 EST 2018

I’ve added branch iss-370 which has a boolean includeUnmatchedTracksInFSP that allows us to include or not the unmatched tracks to the FinalStateParticles list with all of the privileges/responsibilities that implies.

On Dec 11, 2018, at 2:26 PM, Graham, Mathew Thomas <mgraham at slac.stanford.edu<mailto:mgraham at slac.stanford.edu>> wrote:

1)  I’d really like to have non-cluster-matched tracks (both positrons and electrons) in FinalStateParticles as well (like we have the non-track-matched clusters).  For the 2015/16 data it matters less, but for the 2019 data it is vital.  Might as well change it now IMO.  I weakly prefer this (going into FinalStateParticles) to adding another collection (“Unmatched Tracks”?) which then get vertexed along with FSPs…

2)  For FEEs not getting vertexed with other tracks in event…eh, I don’t have very a strong use case for doing it other than my greed for information.  I sort of feel like the >0.75*EBeam is a little tight as well (maybe not for 1 GeV) and will have to be tuned for the beam energy…maybe should be defined as a nSigma cut?

On Dec 11, 2018, at 12:42 PM, Rafayel Paremuzyan <rafopar at jlab.org<mailto:rafopar at jlab.org>> wrote:

All "non-cluster-matched" negative tracks go into "OtherElectrons" regardless of momentum.

for P < 0.75*Ebeam, I would like at least P < 2.15 GeV, however if for FEE analysis one should read
both "FSP" and "OE" collections, then it doesn't matter the cut value for FEE analysis, while it is important
for v0 analysis to be very safe, because this cut determines at the recon level whether the electron will
be vertexed or not.

There was a suggestion to put the cut very high e.g. 2.8 GeV, I think this doesn't hurt to FEE analysis
since these electrons will be either in FSP or OE collection, however it might be useful to have them in FSP,
if one wants to see continuous (non-cut) various momentum dependent distributions.

Rafo

On 12/11/18 3:13 PM, Graham, Mathew Thomas wrote:
Ok, from the table for the new finalStateParticle collection, should I interpret the “e-“ line to mean that non-cluster-matched electrons with p<0.75*beam are included?

I should have thought of this earlier but was this tested on MC?  I’m guessing the timing offsets will have to be changed for that...

On Dec 11, 2018, at 11:27 AM, Nelson, Timothy Knight <tknelson at slac.stanford.edu<mailto:tknelson at slac.stanford.edu>> wrote:

Matt, Omar, and All,

We need to have further discussion of these selections ASAP.  Please refer to the attached slide, shown most recently in this meeting:
https://urldefense.proofpoint.com/v2/url?u=https-3A__confluence.slac.stanford.edu_display_hpsg_October-2B16-252C-2B2018&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=J4PP6Zl8IyGHpsqWaKegORCYw8hoCHePTw5O95a5lqQ&m=9crw6CtOc_-TxTQG-AeLC6F3wYw27932UtISHA7PXQY&s=CwwKTz0Hlq1U7EXKzXitU6P3NRygAxPmJgdZnwK1RrM&e= <https://urldefense.proofpoint.com/v2/url?u=https-3A__confluence.slac.stanford.edu_display_hpsg_October-2B16-252C-2B2018&d=DwMGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=J4PP6Zl8IyGHpsqWaKegORCYw8hoCHePTw5O95a5lqQ&m=45qhrfgtJfQeCFu_d7LhUf28kLWeEL6ONWiqc1YDum0&s=jxp-iSSY3SQQcreWp09qcT6Ow4DLZni6tb08k-w8Pfk&e=>

Which shows - among other things - how MollerCandidates/MollerVertices are produced and stored from both FinalStateParticles and OtherElectrons.  Please do not make new proposals without first completely digesting what has been validated and is already in place as represented here.

As far as the momentum cut for final state particles, this is what Miriam has to say:
> Honestly, I think the best thing to do for FEE analyses where you need +/- 3 sigma, is to read in both the OtherElectrons collection and the FinalStateParticles collection.  Most of what you need will come from OtherElectrons, and then you can look through the FinalStateParticles for any FEEs at the lower-energy end of the distribution that you might be missing.
> I thought it had been decided at previous MOUSE discussions that this would be better than playing with the MOUSE cuts.  But maybe the people analyzing FEEs were not part of those discussions -- I really don't recall.

With this in mind, the other possibility for setting the maximum momentum cut for FinalStateParticles (to be used for analysis) is simply to raise the cut so that it is very loose w.r.t. analysis cuts, like 0.9E_beam.  Is there a very good reason for not simply doing that, and using the concatenation of FSP/OE for FEE analyses?  That would be my counterproposal.  Maybe there is a third way?

Cheers,
Tim

https://urldefense.proofpoint.com/v2/url?u=https-3A__confluence.slac.stanford.edu_download_attachments_240285548_mouse-2520table.pdf&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=J4PP6Zl8IyGHpsqWaKegORCYw8hoCHePTw5O95a5lqQ&m=9crw6CtOc_-TxTQG-AeLC6F3wYw27932UtISHA7PXQY&s=eEhUf-82aln5U8GnYUTOtFQWyRKCvUqnDsz3NE9qwUI&e= <https://urldefense.proofpoint.com/v2/url?u=https-3A__confluence.slac.stanford.edu_download_attachments_240285548_mouse-2520table.pdf&d=DwMGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=J4PP6Zl8IyGHpsqWaKegORCYw8hoCHePTw5O95a5lqQ&m=45qhrfgtJfQeCFu_d7LhUf28kLWeEL6ONWiqc1YDum0&s=_kG9rzALUdZPI7THc0ue4jevfJKrlQNxUlPjux_Pn24&e=>

> On Dec 10, 2018, at 3:30 PM, Graham, Mathew Thomas <mgraham at slac.stanford.edu<mailto:mgraham at slac.stanford.edu>> wrote:
>
>
> Hi All,
>
> We’ll have an analysis  meeting tomorrow @ 9am/11am PST/EST:
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__confluence.slac.stanford.edu_display_hpsg_December-2B11-252C-2B2018-2BMeeting&d=DwIGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=J4PP6Zl8IyGHpsqWaKegORCYw8hoCHePTw5O95a5lqQ&m=9crw6CtOc_-TxTQG-AeLC6F3wYw27932UtISHA7PXQY&s=U1geIFdryFcLEQsWpqCHKptze0kZ_D2rde3eXwo2t20&e= <https://urldefense.proofpoint.com/v2/url?u=https-3A__confluence.slac.stanford.edu_display_hpsg_December-2B11-252C-2B2018-2BMeeting&d=DwMGaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=J4PP6Zl8IyGHpsqWaKegORCYw8hoCHePTw5O95a5lqQ&m=45qhrfgtJfQeCFu_d7LhUf28kLWeEL6ONWiqc1YDum0&s=pcExho-BMHRQs8LNVOyKym-DR-DndbV3NKttgVGxucU&e=>
>
>
> Bluejeans Connections:
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<mouse table.pdf>

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