[Brahms-l] Fw: New STAR Paper on multiplicity depedence of pt sepctra in pp collisions at roots = 200 GeV

FYI



From: "Tim Hallman" <hallman@bnl.gov>
To: "'Bond, Peter D'" <bond@bnl.gov>; "William A. Zajc" <zajc@nevis.columbia.edu>; "Videbaek, Flemming" <videbaek@bnl.gov>; "Busza, 
Wit" <busza@mit.edu>
Cc: "Hallman" <hallman@bnl.gov>
Sent: Thursday, June 15, 2006 4:41 PM
Subject: New STAR Paper on multiplicity depedence of pt sepctra in pp collisions at roots = 200 GeV


> Dear Peter, Bill, Flemming, and Wit;
>
> It is my pleasure to announce STAR's intention to
> submit the following paper to Phys. Rev. D in one
> week's time:
>
> "The multiplicity dependence of inclusive p_t spectra
> from p-p collisions at \sqrt{s} = 200 GeVC".
>
> The abstract is enclosed.
>
>                           Sincerely,
>
>                           Tim Hallman
>
>
> We report measurements of transverse momentum p_t
> spectra for ten event multiplicity classes of p-p collisions
> at \sqrt{s} = 200$~GeV. By analyzing the multiplicity
> dependence we find that the spectrum shape can be decomposed
> into a part with amplitude proportional to multiplicity
> and described by a L\'evy distribution on transverse mass
> m_t, and a part with amplitude proportional to multiplicity
> squared and described by a gaussian distribution on transverse
> rapidity y_t. The functional forms of the two parts are nearly
> independent of event multiplicity. The two parts can be
> identified with the soft and hard components of a two-component
> model of p-p collisions. This analysis then provides the first
> isolation of the hard component of the p_t spectrum as a
> distribution of simple form on y_t.
> 

_______________________________________________
Brahms-l mailing list
Brahms-l@lists.bnl.gov
http://lists.bnl.gov/mailman/listinfo/brahms-l