STAR HardProbes PWG

[Nihar Sahoo <nihar AT rcf.rhic.bnl.gov>]

Hello Raghav,

I agree with you. And I would like to correct my statement in the line 
you mentioned.

UE and pileup are QCD processes and they contain both p-QCD and np-QCD 
processes.

Thank you
Nihar


On 2023-06-29 17:42, Raghav Kunnawalkam Elayavalli wrote:
> Hi Nihar,
>
> Pileup are soft collisions in addition to the main hard scattering and
> so they could be in essence  perturbative or non-perturbative by
> themselves, but they don’t belong to the jet in question yes. So
> I’m fine with your sentence below
>
> > So I would prefer to say "...to mitigate non-perturbative (like
> > hadronization and UE) and pileup effects”
>
> Cheers
> Raghav
>
> **************************************
> First Name - Raghav
> Last Name - Kunnawalkam Elayavalli
> Pronouns - they/them
> email - raghav.ke AT vanderbilt.edu
> website - https://www.raghavke.me  [3]
>
> RHIC/AGS UEC member
> Assistant Professor of Physics
> Stevenson Center 6410
> Physics & Astronomy Department
> Vanderbilt University
> Nashville, TN 37235-1807
> **************************************
>
> > On Jun 29, 2023, at 11:57 AM, Nihar Sahoo <nihar AT rcf.rhic.bnl.gov>
> > wrote:
> > Hello Raghav,
> >
> > Yes, non-perturbative effects can be hadronization and UE. But
> > SoftDrop also reduces the pileup effect in jets; and pileup is not a
> > non-perturbative effect and it comes from multiple hadron
> > scatterings.
> >
> > _ "…SoftDrop used …to mitigate non-perturbative effects " ->
>  So I would prefer to say "...to mitigate non-perturbative (like
> hadronization and UE) and pileup effects"
>
> Best
> Nihar
>
> On 2023-06-29 15:08, Raghav Kunnawalkam Elayavalli wrote:
>
> > Hi Nihar,
> > Just to push back on the point you raise in slide 2 - the abstract
> > of
> > that paper you linked to in the bottom explicitly says -
> > "non-perturbative effects such as hadronization and the underlying
> > even”. Then in section 6 of the paper, they discuss in detail how
> > doing softdrop makes an observable robust to these effects which one
> > cannot calculate w.r.t the jet which would make something
> > perturbative. So it is absolutely true that "SoftDrop is used to
> > mitigate non-perturbative effects”
> > Cheers
> > Raghav
> > **************************************
> > First Name - Raghav
> > Last Name - Kunnawalkam Elayavalli
> > Pronouns - they/them
> > email - raghav.ke AT vanderbilt.edu
> > website - https://www.raghavke.me [1]  [2]
> > RHIC/AGS UEC member
> > Assistant Professor of Physics
> > Stevenson Center 6410
> > Physics & Astronomy Department
> > Vanderbilt University
> > Nashville, TN 37235-1807
> > **************************************
> > On Jun 29, 2023, at 8:16 AM, Nihar Sahoo via Star-hp-l
> > <star-hp-l AT lists.bnl.gov> wrote:
> > Hello Minika,
> > Please find my comments on your nice overview slides.
> > Slide2:
> > _ "…SoftDrop used …to mitigate non-perturbative effects " -> In
> > fact this statement is not correct. SoftDorp is used to mitigate the
> > effect of ISR, UE and pileup. For a reference, have a look at one of
> > original papers  https://arxiv.org/pdf/1402.2657.pdf [2] [1]
> > SLide 6and7:
> > As you discussed in previous slide two corrections methods:
> > RooUnfold and MultiFold
> > I would suggest to put in Title "RooUnfold Method" or similar.
> > Slide10:
> > Title "Motivation" comes abruptly after many slides. Needs to say
> > Motivation for/of what?
> > Slide12:
> > "…and more perturbative" -> a vague statement. Mention why you
> > claim this is "perturbative"? Like 1/z trend of AP, DIGLAP…?
> > SLide18:
> > In the Lund diagram, mention what is "Δ" ? and relate that with R_g
> > Slide19:
> > _"we move from non-perturbative to perturbative region" -> this is
> > again a vague statement. Not sure how do you claim this. Because
> > look at my comment slide#2.
> > Best
> > Nihar
> > On 2023-06-24 06:10, webmaster--- via Star-hp-l wrote:
> > Dear Star-hp-l AT lists.bnl.gov members,
> > Monika Robotkova (robotmon AT fjfi.cvut.cz) has submitted a material
> > for a
> > review, please have a look:
> > https://drupal.star.bnl.gov/STAR/node/64125
> > Deadline: 2023-07-03
> > ---
> > If you have any problems with the review process, please contact
> > webmaster AT www.star.bnl.gov
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>  Links:
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> [1]
> https://urldefense.com/v3/__https://arxiv.org/pdf/1402.2657.pdf__;!!P4SdNyxKAPE!AXhjVRnfJ_VV4CS3OHZ-j7FEue0LqD-uwhYQga3XapnVP68Ywh4lMcmti2clyHm12pRUc-8Mxh2zCXUQCHQlurUtEeFhQ4g$
> [2]
> https://urldefense.com/v3/__https://www.raghavke.me__;!!P4SdNyxKAPE!AXhjVRnfJ_VV4CS3OHZ-j7FEue0LqD-uwhYQga3XapnVP68Ywh4lMcmti2clyHm12pRUc-8Mxh2zCXUQCHQlurUtIC90WCw$
>
>
> Links:
> ------
> [1] 
> https://urldefense.com/v3/__https://www.raghavke.me/__;!!P4SdNyxKAPE!GMTWkymWj1KG0fepZk19LF9oZLC-jzWUhh_2m6uQaSd6P34zYolwr2M6vQxJh4iZ-2i3kcfsgEPe5npzKNIIQ1FtufdHjDQ$
> [2] 
> https://urldefense.com/v3/__https://arxiv.org/pdf/1402.2657.pdf__;!!P4SdNyxKAPE!GMTWkymWj1KG0fepZk19LF9oZLC-jzWUhh_2m6uQaSd6P34zYolwr2M6vQxJh4iZ-2i3kcfsgEPe5npzKNIIQ1FtC3b-WLo$
> [3] 
> https://urldefense.com/v3/__https://www.raghavke.me__;!!P4SdNyxKAPE!GMTWkymWj1KG0fepZk19LF9oZLC-jzWUhh_2m6uQaSd6P34zYolwr2M6vQxJh4iZ-2i3kcfsgEPe5npzKNIIQ1Ft_YCTqS0$