[Brahms-l] Fwd: New PHENIX paper on phi meson modification

FYI


Flemming Videbaek
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
Bldg 510D
Upton, NY 11973

phone: 631-344-4106
cell     :  631-681-1596





Begin forwarded message:

> From: Barbara Jacak <jacak_at_skipper.physics.sunysb.edu>
> Date: April 13, 2010 6:19:00 PM EDT
> To: Nu Xu <NXu_at_lbl.gov>, "Videbaek, Flemming" <videbaek_at_bnl.gov>,  
> Wit Busza <busza_at_mit.edu>, "Vigdor, Steven" <vigdor_at_bnl.gov>
> Subject: New PHENIX paper on phi meson modification
>
> Dear Nu, Wit, Flemming and Steve,
>
> I am happy to announce that in one week's time, the
> PHENIX Collaboration will submit a paper to Phys.
> Lett. B on the topic indicated in the subject line.
> Please find the title and abstract below.
>
> best regards,
> Barbara
>
> -----------------------------------------------------
> Title:
> Nuclear modification factors of  phi meson in d+Au, Cu+Cu and Au+Au
> collisions at
> sqrt s_NN = 200 GeV
>
> Abstract:
> The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC)
> has performed systematic
> measurements of phi  meson production in the K+K- decay channel at
> mid-rapidity in p + p,
> d+Au, Cu+Cu and Au+Au collisions at sqrt s_NN . Results are presented
> on the phi  invariant
> yield and the nuclear modification factor R_AA for Au+Au and Cu+Cu,
> and R_dA for d+Au
> collisions, studied as a function of transverse momentum (1 < pT
> (GeV/c)< 7) and centrality.
> In central and mid-central Au+Au collisions, the R_AA of phi  exhibits
> a suppression relative
> to expectations from binary scaled p+p results. The amount of
> suppression is smaller than
> that of the pi-0 and the eta in the intermediate pT range (2 - 5
> GeV/c), whereas at higher pT
> the  , pi-0 and eta show similar suppression. The baryon (protons and
> anti-protons) excess
> observed in central Au+Au collisions at intermediate pT is not
> observed for the  meson despite
> the similar mass of the proton and the  . This suggests that the
> excess is linked to the number
> of constituent quarks rather than the hadron mass. This difference
> gradually disappears with
> decreasing centrality and for peripheral collisions the R_AA values
> for both particles are
> consistent with binary scaling. Cu+Cu collisions show the same yield
> and suppression as
> Au+Au collisions for the same number of N_part. The R_dA of  phi shows
> no evidence for
> cold nuclear effects within uncertainties.



_______________________________________________
Brahms-l mailing list
Brahms-l_at_lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/brahms-l