NDLI: Extent of sensitivity of single photon production to parton distribution functions

Content Provider	Springer Nature Link
Author	DE, SOMNATH
Copyright Year	2014
Abstract	We have studied the production of single isolated prompt photons in high-energy proton–proton collisions at the RHIC ( $\sqrt {s}$ = 200 GeV) and the LHC ( $\sqrt {s}$ = 7 TeV) energies within the framework of perturbative QCD upto next-to leading order of strong coupling (α $_{s}$). We have used five different parametrizations of parton distribution function (PDF) starting from the old CTEQ4M to the new CT10 distributions and compared our results with the recent single-prompt photon data from the PHENIX and the CMS Collaborations. The prompt photon cross-section is found to be described equally well by all the PDFs within the experimental errors at the RHIC and the LHC energies. The deviation in the single-prompt photon yield for different PDF sets is within ±20% when compared to CTEQ4M, indicating the upper bound of uncertainty in determining the gluon density. The diphoton measurement could be a potential candidate to constrain the gluon distribution inside the proton.
Starting Page	1039
Ending Page	1047
Page Count	9
File Format	PDF
ISSN	03044289
Journal	Pramana
Volume Number	82
Issue Number	6
e-ISSN	09737111
Language	English
Publisher	Springer India
Publisher Date	2014-05-29
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Prompt photon parton distribution function perturbative quantum chromodyanmics. Physics Astronomy, Observations and Techniques Astrophysics and Astroparticles
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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