sPHENIX cold QCD topical group

[David Morrison <morrison AT bnl.gov>]

Hi John et al,

Nice.  It's starts off nicely even in the abstract, "In addition to
measurements at central rapidity, we consider also observables at
forward rapidity, consistent with proposed upgrades to the experimental
capabilities of STAR and sPHENIX."  I hope this preprint is on the ALD's
reading list.

Dave


On 4/23/19 10:09 AM, Lajoie, John G [PHYSA] wrote:
> Dear Cold QCD’ers:
> 
>  
> 
> Many of you may recall that at the time we were working on the sPHENIX
> Forward Instrumentation LOI (June 2017), Joe Osborn and I were
> communicating with the EPPS16 authors to provide projections for how a
> concerted program in p+A physics could constrain nuclear PDF’s.  In
> particular, the EPPS16 authors developed a way to handle a common
> normalization systematic between multiple measurements and provide
> improved constraints, especially on the gluon nPDF.  This work has just
> been submitted to the arXiv, and we plan to submit it for publication in
> PRD as well:
> 
>  
> 
> https://arxiv.org/abs/1904.09921# <https://arxiv.org/abs/1904.09921>
> 
>  
> 
> The paper describes improved (indirect) constraints on the gluon nPDF
> using forward DY, as at the time we didn’t think it was feasible to
> consider forward prompt photon measurements in fsPHENIX.  Sasha
> Basilevsky has shown that this may well be possible, and R&D is ongoing
> for a forward EMCal idea that may be able to provide such a
> measurement.  This will only strengthen the argument for a comprehensive
> nPDF program at RHIC.
> 
>  
> 
> Regards,
> John
> 
>  
> 
> *
> John Lajoie*
> 
> Professor of Physics
> 
> Iowa State University
> 
>  
> 
> (515) 294-6952
> 
> lajoie AT iastate.edu
> 
>  
> 
> 
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-- 
David Morrison  Brookhaven National Laboratory  phone: 631-344-5840
                Physics Department, Bldg 510 C    fax: 631-344-3253
                          Upton, NY 11973-5000  email: dave AT bnl.gov