[Brahms-l] Fwd: STAR new paper on the measurement of dihadron correlations at RHIC

FYI


Flemming Videbaek

> Subject: STAR new paper on the measurement of dihadron correlations  
> at RHIC
>
> Dear Barbara, Wit, Flemming and Steve,
>
> I am pleased to announce that the STAR collaboration will submit to  
> Physical Review C,  in one week's time,  a new paper on the  
> measurement of di-hadron correlations relative to the event plane in  
> 200 GeV Au+Au collisions. The title and abstract are included below.
>
> Best regards,
>
> Nu Xu
>
> -----------------------------------------------------------------------
>  Nu Xu
>
>  Build. 510A, I-181	    Phone:  (631)344-3471
>  P.O. Box 5000, BNL	    Fax:       (631)344-4206
>  Upton, NY11973		
>     	    				    Mobile: (510)289-8119
>  MS70R0319, NSD         Phone:  (510)495-2951
>  LBNL        			    Fax:       (510)486-4818
>  Berkeley, CA94720	    http://www-rnc.lbl.gov/~nxu		
> -----------------------------------------------------------------------
>
>
> Title: "Measurements of Dihadron Correlations Relative to the Event  
> Plane in Au+Au Collisions at sqrt(s_NN)= 200 GeV"
>
> Abstract: "Dihadron azimuthal correlations containing a high  
> transverse momentum (pT ) trigger particle are sensitive to the  
> properties of the nuclear medium created at RHIC through the strong  
> interactions occurring between the traversing parton and the medium,  
> i.e. jet-quenching. Previous measurements revealed a strong  
> modification to dihadron azimuthal correlations in Au+Au collisions  
> with respect to p+p and d+Au collisions. The modification increases  
> with the collision centrality, suggesting a path-length dependence  
> to the jet-quenching effect. This paper reports STAR measurements of  
> dihadron azimuthal correlations in medium central (20-60%) Au+Au  
> collisions at psNN = 200 GeV as a function of the trigger  
> particle’s azimuthal angle relative to the event plane, phi_s = | 
> phi_t −  psi_{EP}|. The azimuthal correlation is studied as a  
> function of both trigger and associated particle pT . The  
> subtractions of the combinatorial background and anisotropic flow  
> are described. The away-side correlation is strongly modified, and  
> the modification varies with phi_s, which is expected to be related  
> to the path-length the away-side parton traverses. The pseudo- 
> rapidity (Delta_eta) dependence of the near-side correlation,  
> sensitive to long range Delta_eta correlations (the ridge), is also  
> investigated. The ridge and jet-like components of the near-side  
> correlation are studied as a function of phi_s. The ridge appears to  
> drop with increasing phi_s while the jet-like component remains  
> approximately constant. These results, with extensive systematic  
> studies of the dihadron correlations as a function of phi_s, trigger  
> and associated particle pT , and the pseudo-rapidity range  
> Delta_eta, should provide stringent inputs to help understand the  
> underlying physics mechanisms of jet-quenching."



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