[Brahms-l] Fwd: New PHENIX paper on J/psi suppression in d+Au

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: September 29, 2010 7:20:43 PM EDT
> To: Nu Xu <NXu_at_lbl.gov>, Wit Busza <busza_at_mit.edu>, "Videbaek,  
> Flemming" <videbaek_at_bnl.gov>, "Vigdor, Steven" <vigdor_at_bnl.gov>
> Subject: New PHENIX paper on J/psi suppression in d+Au
>
> 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.Rev.
> Letters on the topic indicated in the subject line. Please
> find the title and abstract below.
>
> best regards,
> Barbara
>
> -----------------------------------------------------
> Title:
> Cold Nuclear Matter Effects on J/ψ Yields as a Function of Rapidity
> and Nuclear Geometry in Deuteron-Gold Collisions at
> $\srt{s_{NN}}$ = 200 GeV
>
> Abstract:
> We present measurements of J/ψ yields in deuteron-gold collisions
> at $\sqrt{s_{NN}}$ = 200 GeV recorded by the PHENIX experiment
> and compare with yields in proton-proton collisions at the same
> energy per nucleon-nucleon collision. The measurements cover a
> large kinematic range in rapidity (−2.2 <y < 2.4) with high  
> statistical
> precision and are compared with two detailed models: one with
> nuclear shadowing combined with final state breakup and one with
> coherent gluon saturation effects. In order to remove model
> dependent systematic uncertainties we also compare the data to
> a simple geometric model. We find that calculations where the
> nuclear modification is linear or exponential in the density weighted
> longitudinal thickness are difficult to reconcile with the forward
> rapidity data.



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