STAR Correlations and Fluctuations PWG

[Xiaofeng Luo <xfluo.star AT hotmail.com>]

    Dear Sam, 
    
           Please find my comment/suggestions below for your AUM talk
    (as the same suggestions to your DNP talk) : 
        
    1. Title : Proton Higher Order Cumulants AuAu 𝑠𝑁𝑁=3.0GeV ->
    
            Higher Order Cumulants of Proton Multiplicity Distributions
    in Au+Au Collisions at sqrt(sNN) = 3.0 GeV.
    
    
        2. Add "for the STAR Collaboration"
    
    
        3. Slide 3, I suggest to re-write slide 3.
    
            Current slide 3 didn't serve the purpose of motivation of
    this measurement : sensitive to correlation length and search for
    the
    
            critical point. You may want to show how the cumulants
    related with the correlation length with some references.
    
    
        4. In slide 4, Title -> STAR net-proton fluctuations
    Measurement from BES-I
    
            show a rise at ... -> show a rise trend below 19.6 GeV.
    
    
        5. In slide 5, please add more information, for example, the
    event statistics, muB value, the year of taking this data etc..
    
            The coordinate system used in this analysis is not STAR
    conventional one. Please mention this how the positive rapidity is
    define.
    
            Should mention the beam direction is defined as positive
    rapidity direction.
    
    
        6. Slide 6, Please write down the black box is -0.5<y<0.5,
    0.4<pT<2 GeV/c  in the slide. and TPC and TOF PID are used.
    
    
        7. Slide 7, the unit of pt and mass square (x-axis of PID plot)
    in the slide are not correct. it should be GeV/c and (GeV/c^2)^2
    
                        Please write down the PID cuts used for each pt
    range.
    
    
        8. I suggest to put the backup slide 18 in your DNP slides just
    after the slide 8. 
            Because those two corrections (CBWC and efficiency
    correction) are very
    
            important for this analysis. And please also mention how to
    evaluate the statistical errors in this slide.
    
    
        9. Slide 10, You and Yu may cross refer each other, since Yu
    also has a presentation (model studies) in DNP meeting.
    
    
        10. Slide 12 and 13,  as we discussed in high moments focus
    meeting, the CBWC used at 3 GeV is not efficient/enough to suppress
    volume
    
              fluctuations at mid-central and peripheral collisions. You
    can also find a model study : arXivl:2009.03755
                Currently,  as we haven't find good solution to suppress
    volume fluctuation yet before DNP meeting, I suggest we only show
    most
    
              central data points for higher order cumulants (C2, C3, C4
    and cumulant ratios), where we have least volume fluctuation effect.
    
              You can discuss the results from central results by doing
    several comparisons : before and after different corrections.
    
    
        11. Slide 14, I suggest write down one or two bullets to discuss
    what's the most important finding from this study.
    
              And also this plot, only FXT data points are STAR
    preliminary and other results from BES-I are final, we may reflect
    
              this in the legend (or put arXIv number for BES-I results
    in legend).
    
    
        12. Summary, I suggest mention the 0-5% results are consistent
    with the results with UrQMD within uncertainties, which is dominated
    by
    
              the effects of baryon number conservation. We may add one
    table or several bullets mention the data taken in BES-II and FXT
    energies.
    
        
    Thank you
    Best Regards,
    Xiaofeng

On 2020/10/16 12:20 AM, webmaster--- via Star-cf-l wrote:

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