[Brahms-l] Fwd: New PHENIX paper on direct photon and pi^0 triggered jets in p+p

FYI





Begin forwarded message:

> From: Barbara Jacak <jacak_at_skipper.physics.sunysb.edu>
> Date: May 23, 2010 5:24:07 PM EDT
> To: Nu Xu <NXu_at_lbl.gov>, Wit Busza <busza_at_mit.edu>, "Videbaek,  
> Flemming" <videbaek_at_bnl.gov>, "Vigdor, Steven" <vigdor_at_bnl.gov>
> Subject: New PHENIX paper on direct photon and pi^0 triggered jets  
> in p+p
>
> Dear Nu, Wit, Flemming and Steve,
>
> I am happy to announce that in one week's time, the
> PHENIX Collaboration will submit a paper to Phys.Rev.C
> on the topic indicated in the subject line. Please find the
> title and abstract below.
>
> best regards,
> Barbara
>
> -----------------------------------------------------
> Title:
> High p_T Direct Photon and pi^0 Triggered Azimuthal
> Jet Correlations in sqrt{s}=200 GeV p+p Collisions
>
> Abstract:
> Correlations of charged hadrons of 1 < pT < 10 GeV/c with
> high pT direct photons and pi^0 mesons in the range 5 <pT
> < 15 GeV/c are used to study jet fragmentation in the photon+jet
> and di-jet channels, respectively. The magnitude of the partonic
> transverse momentum, kT, is obtained by comparing to a model
> incorporating a Gaussian kT smearing. The sensitivity of the
> associated charged hadron spectra to the underlying fragmentation
> function is tested and the data are compared to calculations using
> recent global fit results. The shape of the direct photon-associated
> hadron spectrum as well as its charge asymmetry are found to be
> consistent with a sample dominated by quark-gluon Compton
> scattering. No significant evidence of fragmentation photon correlated
> production is observed within experimental uncertainties.



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