Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session EF: Mini-symposium on Studying Quantum Chromodynamics at an Electron-Ion Collider II
7:00 PM–9:00 PM,
Thursday, October 25, 2018
Hilton
Room: King's 2
Chair: Phiala Shanahan, MIT
Abstract ID: BAPS.2018.HAW.EF.8
Abstract: EF.00008 : Parton pseudo-distributions and their evolution*
8:45 PM–9:00 PM
Presenter:
Anatoly V Radyushkin
(Old Dominion Univ/Jefferson Lab)
Author:
Anatoly V Radyushkin
(Old Dominion Univ/Jefferson Lab)
We study evolution of parton pseudo-distributions using the data of exploratory lattice calculations
by Orginos et al. We extend the analysis beyond the leading-logarithm analysis by incorporating recent calculations of one-loop corrections for the reduced Ioffe-time pseudo-distribution ${\mathfrak M} (\nu,z_3^2)$. We observe that the one-loop corrections contain a large term reflecting the fact that effective distances involved in the most important diagrams are much smaller than the nominal distance $z_3$. We find that the large correction in this case may be absorbed into the evolution term. As a result, the perturbative expansion used for extraction of
$\overline{\rm MS}$-scheme parton densities at the $\mu \approx 2$ GeV scale is under control. The extracted parton distribution is rather close to global fits in the $x>0.1$ region, but deviates from them for $x<0.1$.
*This work is supported by Jefferson Science Associates, LLC under U.S. DOE Contract \#DE-AC05-06OR23177 and by U.S. DOE Grant \mbox{\#DE-FG02-97ER41028. }
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.EF.8
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