STAR Flow, Chirality and Vorticity PWG

["Ray, Robert L" <ray AT physics.utexas.edu>]

Dear Subash, Prithwish, FCV:

I have edited the PWGC presentation as recommended at last

week's FCV meeting. The pdf is posted on my blog at:

https://drupal.star.bnl.gov/STAR/system/files/Factorization_PWGC_Preview_Talk_2.pdf

Comments from FCV and resulting changes:

1. Meaning of "conventional" in the summary: I emphasized on slide 3
   how the present analysis method differs from the conventional EP method.
   On slide 31, I explicitly noted that "conventional" here, refers to the physics
   picture.
2.  Include details about PID and its systematics: I added slide 10 to briefly
    outline the PID method and slide 30 to indicate how the systematic
    uncertainty due to PID impurity is estimated.
3.  Provide some forward-looking statements: Some ideas are listed on new,
    and closing slide 32.
   
   

Comments welcome. Please let me know if further edits are needed for this

presentation to the PWG conveners.

Thanks,

Lanny

---

From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of Ray, Robert L via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
Sent: Wednesday, July 10, 2024 2:41 PM
To: Prithwish Tribedy <ptribedy AT rcf.rhic.bnl.gov>; STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>; William Llope <wjllope AT wayne.edu>
Cc: Ray, Robert L <ray AT physics.utexas.edu>
Subject: Re: [Star-fcv-l] FCV PWG meeting on 10/July/2024 Wed. 9:30 AM EDT

 

Hi Prithwish:

The pipi and KK correlations are available at,

https://drupal.star.bnl.gov/STAR/system/files/PID_correl_dist_pipi_KK_LS_Cent5.pdf

I will figure out how to make all 2000 2D distributions available for viewing.

It needs to be on a web server which supports STAR Protected. There are a lot

of files to move to RACF, but we'll see what to do.

Lanny

---

From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of Ray, Robert L via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
Sent: Wednesday, July 10, 2024 1:18 PM
To: Prithwish Tribedy <ptribedy AT rcf.rhic.bnl.gov>; STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>; William Llope <wjllope AT wayne.edu>
Cc: Ray, Robert L <ray AT physics.utexas.edu>
Subject: Re: [Star-fcv-l] FCV PWG meeting on 10/July/2024 Wed. 9:30 AM EDT

 

Hi Pritwish:

The difference between the pipi and KK like-sign is just

the HBT correlations. The reasons are due to the (yt,yt)

cut bins selected for these sample plots.

The (yt,yt) cut bin for pi+pi in Fig.2 (slide 12) is #8 (see Table II 

on slide 10) , which is off-diagonal (i.e. pt's are different, 

q = pt1 -pt2, is large, HBT is reduced). I selected an off-diagonal 

pi+pi correlation to compare with the unlike-sign and did 

not want the HBT peak to confuse the visual comparison.

The (yt,yt) cut bin for K+K in Fig. 2 is #5 which is diagonal and

is a low momentum bin (Table III on slide 10). The peak is HBT 

and the slight suppression surrounding it is likely Coulomb 

repulsion. I had limited options with K+K because I wanted a 

plot for the unlike-sign K+K where the phi resonance is pronounced.

That selection dictated that I use cut bin #5. But other choices are

possible.

Sorry I didn't explain this during the meeting.

The plots of ALL the PID correlations are on our local server

but because super strict IT rules are not just at BNL, these

pages are only available on our local VPN. I'll see how to make

these available to STAR. In the mean time I'll cut/paste the

images and post these on the paper's webpage.

Thanks,

Lanny

---

From: Prithwish Tribedy <ptribedy AT rcf.rhic.bnl.gov>
Sent: Wednesday, July 10, 2024 12:34 PM
To: Ray, Robert L <ray AT physics.utexas.edu>; STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>; William Llope <wjllope AT wayne.edu>
Subject: Re: [Star-fcv-l] FCV PWG meeting on 10/July/2024 Wed. 9:30 AM EDT

 

Hi Lanny,
   The study by Bill and Ayeh can you found here:
https://nam12.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fblog%2Fajowzaee%2Fbeam-energy-dependence-two-particle-angular-correlations-auau-collisions-rhic&data=05%7C02%7C%7C399c2d2beb85414649db08dca10683a5%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638562296567869004%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=O8Y0WtfEODAWoT1cSEik4010w45Ndhwf5dA0g8mU3nk%3D&reserved=0

I am cc'ing Bill, he may have point us to previous study of TOF PID cuts
on 2D correlation functions. If I remember correctly he and Ayeh did
look at these extensively.

@Bill:
One a similar note, we're trying to understand the plots on slide#12

https://nam12.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fsystem%2Ffiles%2FFactorization_PWGC_Preview_Talk_1.pdf&data=05%7C02%7C%7C399c2d2beb85414649db08dca10683a5%7C31d7e2a5bdd8414e9e97bea998ebdfe1%7C0%7C0%7C638562296567877803%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=uJOXoXbJVLcHCAEPc%2FERn%2BNmgrrvDsYZ3m6HPDWOYXw%3D&reserved=0

For example, let's try to understand why KK looks so different from
pi-pi.

Best,
Prithwish


On 2024-07-10 12:23, Ray, Robert L wrote:
> Hi Prithwish:
>
>  Thanks for the discussion and input on the paper proposal.
>  I am quite aware of Bill and Ayea's paper. I was one of the
>  institutional reviewers.
>
>  In Bill Llope's ppt the only mention I found is on slide 9.
>  There isn't any detail about PID contamination effects that
>  I see here.  Is there a different talk maybe?
>
>  Thanks,
>  Lanny
>
> -------------------------
>
> From: Prithwish Tribedy <ptribedy AT rcf.rhic.bnl.gov>
> Sent: Wednesday, July 10, 2024 9:57 AM
> To: STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
> Cc: Ray, Robert L <ray AT physics.utexas.edu>
> Subject: Re: [Star-fcv-l] FCV PWG meeting on 10/July/2024 Wed. 9:30 AM
> EDT
>
> Hi Lanny,
>    Something happened, can you please change your name/id, maybe use
> your
> surname, and try to join again.
> Best,
> Prithwish
>
> On 2024-07-10 10:40, Ray, Robert L via Star-fcv-l wrote:
>> Hi,
>>  My headset died. I should be OK now.
>>  But I cannot rejoin the meeting.
>>
>>  Lanny
>>
>> -------------------------
>>
>> From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of
>> subhash via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
>> Sent: Sunday, July 7, 2024 7:58 PM
>> To: STAR Flow, Chirality and Vorticity PWG
> <star-fcv-l AT lists.bnl.gov>
>> Cc: subhash <subhash AT rcf.rhic.bnl.gov>
>> Subject: [Star-fcv-l] FCV PWG meeting on 10/July/2024 Wed. 9:30 AM
> EDT
>>
>>
>> Dear All,
>>
>> We shall have our weekly FCV PWG meeting this Wednesday
> (10/July/2024)
>>
>> at 9:30 AM EDT. If you wish to present please let us know. The
> agenda
>> will be collected at:
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>> Thanks and regards,
>> Prithwish, Zhenyu and Subhash
>>
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