Extracting the Proton Longitudinal Structure Function Moments from World Data

Details Extracting the Proton Longitudinal Structure Function Moments from World Data Extracting the Proton Longitudinal Structure Function Moments from World Data

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..aprw10002m&link_type=abstract

American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #W10.002

Physics

Scientific paper

We present an extraction of the lowest three moments of the proton longitudinal structure function FL from available world data between Q^2 = 0.75 and 45.0 (GeV/c)^2. This analysis utilizes new data from DESY at low Bjorken x and from Jefferson Lab at high x, allowing the moments to be determined relatively free from uncertainties due to extrapolations into unmeasured regions. The moments are compared with several parton distribution function parameterizations, which tend to underestimate the higher order moments. This suggests either the presence of significant higher twist effects in FL or a larger gluon distribution at high x.

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