STAR Flow, Chirality and Vorticity PWG

[Sooraj Radhakrishnan <skradhakrishnan AT lbl.gov>]

Hi Gavin,

   These are nice results and quite interesting. I have a question on the rapidity dependence. The observed rapidity dependence is quite strong, and also the value of rho_00 for y < 0.5 is quite close to 1/3. I see that for efficiency correction you use a flat distribution in rapidity. At these energies is this a reasonable distribution to use? Do you have any systematics on the impact of the rapidity distribution used on efficiency evaluation?

For the theory calculation, is this the same model as in the nature paper? Could you add the reference? Are there any assumptions in getting the rapidity dependence? Why wouldnt we see the spin-alignment at mid-rapidity, and see large values at forward rapidity? Shouldn't the physics causing spin alignment be present at mid-rapidity too? I see on your S33 the explanation that the values are linked to motion of the particle. Is this a trivial kinematic effect? The px, py, pz here are in lab frame?

thanks

Sooraj

On Thu, Aug 17, 2023 at 9:06 PM Gavin Wilks via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:

Dear FCV Convenors, 

My preliminary request for QM2023 φ-meson global spin alignment analysis can be found here: https://drupal.star.bnl.gov/STAR/system/files/userfiles/6551/PreliminaryRequest_QM2023_FoldedRapidity.pdf

Best,

Gavin

_______________________________________________
Star-fcv-l mailing list
Star-fcv-l AT lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/star-fcv-l

--

Sooraj Radhakrishnan

Research Scientist,

Department of Physics

Kent State University

Kent, OH 44243

Physicist Postdoctoral Affiliate

Nuclear Science Division
Lawrence Berkeley National Lab
MS70R0319, One Cyclotron Road

Berkeley, CA 94720

Ph: 510-495-2473

Email: skradhakrishnan AT lbl.gov