[Brahms-l] Fw: New STAR Paper on Identified Baryon and Meson Distributions at Large Transverse Momenta

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


Subject: New STAR Paper on Identified Baryon and Meson Distributions at Large Transverse Momenta


> Dear Peter, Bill, Flemming and Wit:
> 
> It is my pleasure to announce STAR's intention to submit the
> following paper to Physical Review Letters in one week's time:
> 
> "Identified baryon and meson distributions at large transverse
> momenta from Au + Au collisions at sqrt(s_NN) = 200 GeV".
> 
> The abstract is enclosed.
> 
>                            Sincerely,
> 
>                            Tim Hallman
> 
> 
> 
> Abstract
> 
> Transverse momentum spectra of pi+-, p and bar p up to 12 GeV/c
> at mid-rapidity in centrality selected Au + Au collisions at
> sqrt(s_NN) = 200 GeV are presented.  In central Au + Au
> collisions, both pi+- and p(\bar p) show significant suppression
> with respect to binary scaling at p_t >~  4 GeV/c.  Protons and
> anti-protons are less suppressed than pi+-, in the range
> 1.5 <~  p_t  <~  6 GeV/c.  The pi-/pi+ and bar p/p ratios show
> at most a weak p_t dependence and no significant centrality
> dependence.  The p/pi ratios in central Au + Au collisions
> approach the values in p+p and d+Au collisions at
> p_t  >~  5 GeV/c.  The results at high p_t indicate that the
> partonic sources of pi+-, p and pbar have similar energy loss
> when traversing the nuclear medium.
>
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