STAR Muon Telescope Detector development

["Zetong Li" <li_vefree AT m.scnu.edu.cn>]

Hi Rongrong,

Thank you for your help. This slide answered a question I have ever had regarding how do we get the two curves used to reject pile-up events on the refMult vs nBtofMatched plot. However, I still don’t fully understand the slides. On the page 2, we see that the trigger we required is vpd-mon, while in our analysis, we use the BHT2 trigger. On the ninth slide, it shows that after applying the vertex cuts, the additional trigger requirements have 100% efficiency in both Ru+Ru and Zr+Zr collisions, but this doesn’t seem to indicate that the events triggered by vpd-mon plus applying vertex cuts can fully cover those triggered by BHT2 plus vertex cuts, which means that the events triggered by BHT2 plus vertex cuts are not completely the same as those triggered by vpd-mon plus vertex cuts. Am I correct and is that OK? Or does this have a minimal impact on our final results?

Additionally, When we correct the refMult for the impact of ZDC rates and Vz, we chose to multiply the refMult by a coefficient rather than adding or subtracting a value. Is this because the influence of zdcrates and Vz on the measurement of refMult is multiplicable? If so, in our nSigmaE correction, should we directly subtract a value related to eta or do the same thing like the refmult correction?

Best regards

Zetong

 

 

------------------ Original ------------------

From:  "Ma, Rongrong"<marr AT bnl.gov>;

Date:  Thu, Aug 29, 2024 03:29 AM

To:  "Zetong Li"<li_vefree AT m.scnu.edu.cn>;

Cc:  "STAR Muon Telescope Detector development"<star-mudet-l AT lists.bnl.gov>;

Subject:  Re: [[Star-mudet-l] ] MTD local meeting 08/28/2024 10:00 am BNL time

 

Hello Zetong

I found this presentation from Te-Chuan about centrality calibration for |vz| < 100 cm: https://drupal.star.bnl.gov/STAR/system/files/TeChuan_IsobarHT_20230301.pdf. See slide 2. Indeed, he used |vz - vz_VPD| < 5 cm cut for the centrality calibration, so I think you need to use the same.

Best

Rongrong

On Aug 26, 2024, at 1:43 PM, Ma, Rongrong <marr AT bnl.gov> wrote:

Hello All

We will have our weekly MTD local meeting at 10:00 am BNL time this Wednesday. Talk to you then.

Thanks!

Best regards

Rongrong

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