STAR Correlations and Fluctuations PWG

[Hanna Paulina Zbroszczyk <hanna.zbroszczyk AT pw.edu.pl>]

Dear CF activists,

I am forwarding Richard’s email regarding some model generations. Please read for more details and let us know what do you need. 

The most important, whether you need more UrQMD vs. SMASH for BES-II comparison.

What configurations would be optimal for you?

Thanks,

Hanna

Hanna Paulina Zbroszczyk

PhD DSc Eng, Professor WUT

E-mail: hanna.zbroszczyk AT pw.edu.pl

Tel: +48 22 234 5851 (office)

Address:

Warsaw University of Technology

Faculty of Physics

Nuclear Physics Division

Koszykowa 75

Office: 117b (via 115)

00-662 Warsaw, Poland

Początek przekazywanej wiadomości:

Od: Rongrong Ma via Star-pwgc-l <star-pwgc-l AT lists.bnl.gov>

Temat: [Star-pwgc-l] Fwd: URQMD

Data: 28 lipca 2022 o 02:29:56 CEST

Do: STAR PWG Convener List <star-pwgc-l AT lists.bnl.gov>

Odpowiedź-do: Rongrong Ma <marr AT rcf.rhic.bnl.gov>, STAR PWG Convener List <star-pwgc-l AT lists.bnl.gov>

Begin forwarded message:

From: Richard Seto <seto AT ucr.edu>

Subject: URQMD

Date: July 27, 2022 at 4:32:20 PM EDT

To: subhash <subhash AT rcf.rhic.bnl.gov>, Rongrong Ma <marr AT rcf.rhic.bnl.gov>

Cc: cebra AT physics.ucdavis.edu, "ShinIchi Esumi <esumi. shinichi. gn@u. tsukuba. ac. jp>" <esumi.shinichi.gn AT u.tsukuba.ac.jp>

Hi Rongrong/Subash
I heard there was a move to run a lot of URQMD simulations and question was asked whether to add a potential.
Who should I talk to about this?
There are a few considerations
1) We might want to consider running other models as well - e.g  SMASH and JAM
2) We probably want to compare cascade with a potential.
But what potential?
The one that seems to work for v3 at 3 GeV is a hard potential with some particular values for the parameters on the Skyrme potential.
I can give you a reference.
But SMASH and JAM have some more, perhaps modern options
- JAM: a relativistic mean field. or a vector potential
-SMASH - not only Skyrme but adding a Symmetry potential.
There are other questions - maybe less important - but we might want (or now want) to turn on Fermi motion.
I think one of the points of the BES is to figure out which of these describes reality. Probably it is best to choose some
generic one as a baseline and use that.
The problem is that I don't know what a good baseline should be. I don't think that it should be a "soft" Skyrme potential - but some hard one would be OK.  That means we need to agree on the parameters.
Best Regards
-Rich
PS - others might have different opinions

Richard Seto
richard.seto AT ucr.edu
Department of Physics and Astronomy
University of California, Riverside
Riverside, CA 92521

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