[Brahms-l] Fw: New STAR Paper on Energy Dependence of Pt Angular Correlations

--------------------------------------------
Flemming Videbaek
Physics Department
Bldg 510-D
Brookhaven National Laboratory
Upton, NY11973

phone: 631-344-4106
cell:       631-681-1596
fax:        631-344-1334
e-mail: videbaek @ bnl.gov
----- Original Message ----- 
From: "Timothy Hallman" <hallman@bnl.gov>
To: "'Bond, Peter D'" <bond@bnl.gov>; "William A Zajc" <zajc@bnl.gov>; "Videbaek, Flemming" <videbaek@bnl.gov>; "'Wit Busza'" 
<busza@MIT.EDU>
Cc: "Hallman" <hallman@bnl.gov>
Sent: Wednesday, May 10, 2006 8:38 PM
Subject: New STAR Paper on Energy Dependence of Pt Angular Correlations


> Dear Peter, Bill, Flemming, and Wit;
>
> It is my pleasure to announce STAR's intention to submit the
> following paper to Journal of Physics G in one week's time:
>
> "The energy dependence of pt angular correlations inferred from mean-pt
> fluctuation scale dependence in heavy ion collisions at the SPS and RHIC".
>
> The abstract is enclosed.
>
>                            Sincerely,
>
>                            Tim Hallman
>
>
> We present the first study of the energy dependence of pt angular
> correlations inferred from event-wise mean transverse momentum <pt>
> fluctuations in heavy ion collisions.  We compare our large-acceptance
> measurements at CM energies sqrt(s_NN) = 19.6, 62.4, 130 and
> 200 GeV to SPS measurements at 12.3 and 17.3.  Pt angular correlation
> structure suggests that the principal source of pt correlations and
> fluctuations is minijets (minimum-bias parton fragments).  We observe
> a dramatic increase in correlations and fluctuations from SPS to RHIC
> energies, increasing linearly with ln sqrt (s_NN) from the onset of
> observable jet-related <pt> fluctuations near 10 GeV.
> 

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