[Brahms-l] Fwd: STAR new papers on local parity violation at RHIC

FYI


> Subject: STAR new papers on local parity violation at RHIC
>
> Dear Barbara, Wit, Flemming and Steve,
>
> I am pleased to announce that the STAR collaboration will submit, in  
> a week's time, two papers regarding to the study of the local parity  
> violation in high-energy nuclear collisions at RHIC. While the short  
> version of the report will be submitted to Physical Review Letters,  
> the longer version, with more analysis details, will be submitted to  
> Physical Review C. Both titles and abstracts are included below.
>
> Best regards,
>
> Nu Xu
>
> -----------------------------------------------------------------------
> Nu Xu
>
> Build. 510A, I-181	    Phone:  (631)344-3471
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> -----------------------------------------------------------------------
> =============================================================
>
> PRL:
> Title:  "Azimuthal Charged-Particle Correlations and Possible Local  
> Strong Parity Violation"
> Abstract: "Parity-odd domains, corresponding to non-trivial  
> topological solutions of the QCD vacuum, might be created during  
> relativistic heavy ion collisions.  These domains are predicted to  
> lead to charge separation of quarks along the system's orbital  
> momentum axis.  We investigate a three particle azimuthal correlator  
> which is a \P~even observable, but directly sensitive to the charge  
> separation effect.  We report measurements of charged hadrons near  
> center-of-mass rapidity with this observable in Au+Au and Cu+Cu  
> collisions at $\sqrt{s_{NN}}$=200~GeV/c using the STAR detector.  A  
> signal consistent with several expectations from the theory is  
> detected.  We discuss possible contributions from other effects that  
> are not related to parity violation."
>
> PRC:
> Title:  "Observation of charge-dependent azimuthal correlations and  
> possible local strong parity violation in heavy ion collisions"
> Abstract: "Parity-odd domains, corresponding to non-trivial  
> topological solutions of  the QCD vacuum, might  be created during  
> relativistic heavy ion collisions.  These domains are predicted to  
> lead to charge separation of quarks along the orbital momentum of  
> the system created in non-central collisions.  To study this effect,  
> we investigate a three particle mixed harmonics azimuthal correlator  
> which is a \P~even observable, but directly sensitive to the charge  
> separation effect.  We report measurements of this observable using  
> the STAR detector in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}} 
> $=200 and 62~GeV.  The results are presented as a function of  
> collision centrality, particle separation in rapidity, and particle  
> transverse momentum.  A signal  consistent with several of the  
> theoretical expectations is detected in all four data sets.  We  
> compare our  results to the predictions of existing event  
> generators, and discuss in detail possible contributions from other  
> effects that are not related to parity violation."
>



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