STAR HardProbes PWG

[Barbara Trzeciak <barbara.trzeciak AT gmail.com>]

Hi Gaohan,

the request looks good to me, I have a few questions and comments:

- s11: I guess you use template fitting for all three Upsilon states, I see that you get -4 Upsilon(3S) - could you please include a plot where you go to negative count values, so that we can see what happens for Upsilon(3S).

Also, please add to the backup fits for all the centrality and pT bins. 

- s12: how do you decide on the variation values for the a parameter of the smearing ?

- s12: could you please add on the plots values of the uncertainties for each of the varied case. 

- s13: do you vary the cuts separately or simultaneously, and is the final sys. unc. max or RMS value ?

- s14: is the final sys. unc. max or RMS value of the variations ?

- s15: how do you estimate the trigger selection criteria uncertainty, and couldn't it differ for the two Upsilon states ?

- s16: Let's leave the N_coll uncertainties like this for now, to be consistent with Au+Au.

Add from where is the p+p reference. What global uncertainties include ?

- s16: could you please add a version of this plot compared to the Au+Au results. 

- s17: What global uncertainties include ? They look quite large, I would expect here that they are from N_coll unc., and p+p uncertainties are included in the pT dependent Upsilon unc. 

- s17: could you please add a version of this plot compared to the Au+Au results. 

- s18: Add legends for data points and fit lines. Add Upsilon decay channel. 

- s16-17: Add physics conclusions to your preliminary physics results. 

Cheers,

Barbara

On Thu, Apr 6, 2023 at 5:17 PM gaohan_yang via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:

Dear conveners and all,

I would like to ask for the preliminary status with the analysis of Upsilon production in Isobar collisions. 

The request presentation and all the figures can be found in the link: 

https://drupal.star.bnl.gov/STAR/blog/ghyang/Preliminary—Upsilon-analysis-isobar-collisions-1

Please let me know if there are any comments or questions.

Best regard,

Gaohan

	gaohan_yang
gaohan_yang AT m.scnu.edu.cn

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