STAR HardProbes PWG

[tc88qy <tc88qy AT rcf.rhic.bnl.gov>]

Hi Barbara,

 The last centrality bin will have large error bar as shown in my 
binning study.
 What about 50-80%, it will reduce the error bars.
 I also checked the 50-80% <N_part> in Isobar, it is comparable with 
60-80% <N_part> in Au+Au.

Qian Yang


On 2023-09-20 12:51, Barbara Trzeciak wrote:
> Hi Qian,
> that's also fine. My only worry is that you will have large
> uncertainty for the pT different rho00 in this bin. But you can check.
>
> Cheers,
> Barbara
>
> On Wed, 20 Sept 2023, 05:39 tc88qy, <tc88qy AT rcf.rhic.bnl.gov> wrote:
>
> > Hi Barbara,
> > I see your point. I agree to include 0-5% centrality to the
> > first
> > bin.
> > If we do 20-40% and 40-80% centrality, the last bin do gain
> > precisions.
> > But we probably need to think about the physics information we want
> > to
> > look at. In our case, it is the charm and anti-charm correlation
> > that
> > affecting by QGP. In most the Au+Au analysis, STAR paper then talk
> > about
> > QGP in a centrality of 0-60%, just like the phi spin alignment paper
> > are
> > carry out at 20-60%.
> > So, I suggest we do the binning of 0-20% , 20-60% and 60-80%.
> > What do you think?
> >
> > Qian Yang
> >
> > On 2023-09-19 23:39, Barbara Trzeciak wrote:
> > > Hi Qian,
> > >
> > > thanks for point to the slides with additional checks.
> > > Regarding 0-5% centrality bin:
> > > As ShinIch also commented, sometimes the most central bin is
> > remove
> > > due to poor event plane resolution. However, in this case I don't
> > see
> > > the resolution being particularly bad, it's not so much worse than
> > for
> > > the mid-central case. If we have enough confidence to have this
> > point
> > > in the centrality differential plot, I don't see a reason why not
> > to
> > > include it when you integrate to wider centrality ranges.
> > > Regarding the other binning:
> > > The reason for having 20-40% and 40-80% is that the precision of
> > the
> > > mid-central point is almost the same while the peripheral bin
> > gains in
> > > precision compare to the 50-80% centrality range.
> > >
> > > Cheers,
> > > Barbara
> > >
> > > On Tue, 19 Sept 2023, 17:21 tc88qy, <tc88qy AT rcf.rhic.bnl.gov>
> > wrote:
> > > > Hi Barbara,
> > > >
> > > > I replied to the HP list for the comments I got from last HP
> > > > meeting.
> > > > Please find the details in this link:
> https://drupal.star.bnl.gov/STAR/system/files/jpsiSpinAlignment_20230917.pdf
> > > > In terms of the binning, I am not sure the reason of 20-40% bin.
> > > >
> > > > Qian Yang
> > > >
> > > > On 2023-09-19 22:15, Barbara Trzeciak wrote:
> > > > > Hi Qian,
> > > > >
> > > > > I see that you consider three centrality classes on plots on
> > > > slides
> > > > > 14-16 - same as you presented last week.
> > > > > As we discussed in more detail at the previous HP meeting, it
> > > > looks a
> > > > > bit weird (and I don't know what's the motivation in this case)
> > > > that
> > > > > you exclude 0-5% centrality bin.
> > > > > I suggest having the first bin as 0-20% centrality, then 20-40%
> > > > and
> > > > > 40-80%.
> > > > > Also, could you please prepare a comparison to the results that
> > > > use
> > > > > the first order event plane.
> > > > >
> > > > > Cheers,
> > > > > Barbara
> > > > >
> > > > > On Mon, Sep 18, 2023 at 10:36 AM tc88qy via Star-hp-l
> > > > > <star-hp-l AT lists.bnl.gov> wrote:
> > > > >
> > > > > > Hello all,
> > > > > > Please find my preliminary plots request in link below:
> https://drupal.star.bnl.gov/STAR/system/files/Preliminary_figures_request_1.pdf
> > > > > > Qian Yang
> > > > > > _______________________________________________
> > > > > > Star-hp-l mailing list
> > > > > > Star-hp-l AT lists.bnl.gov
> > > > > > https://lists.bnl.gov/mailman/listinfo/star-hp-l