|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
20 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
CT14QED PDFs from Isolated Photon Production in Deep Inelastic Scattering | | Carl Schmidt
; Jon Pumplin
; Daniel Stump
; C.-P. Yuan
; | | Date: |
9 Sep 2015 | | Abstract: | We describe the implementation of Quantum Electrodynamic (QED) evolution at
Leading Order (LO) along with Quantum Chromodynamic (QCD) evolution at
Next-to-Leading Order (NLO) in the CTEQ-TEA Global analysis package. The photon
Parton Distribution Function (PDF) is described by a two-parameter ansatz,
coming from radiation off the valence quarks, and based on the CT14 NLO PDFs.
Setting the two parameters equal, allows us to completely specify the photon
PDF in terms of the momentum fraction carried by the photon, $p_0^gamma$, at
the initial scale $Q_0=1.295$ GeV. We obtain constraints on the photon PDF by
comparing with ZEUS data~cite{Chekanov:2009dq} on the production of isolated
photons in deep inelastic scattering, $ep
ightarrow egamma+X$. For this
comparison we present a new perturbative calculation of the process that
consistently combines the photon-initiated contribution with the
quark-initiated contribution. Comparison with the data allows us to put a
constraint at the 90% confidence level of $p_0^gammalesssim0.14\%$ for the
photon PDF at the initial scale of $Q_0=1.295$ GeV in the one-parameter
radiative ansatz. The resulting CT14QED PDFs will be made available to the
public. | | Source: | arXiv, 1509.2905 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER