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HEP/Astro Journal Club -- Friday, 26 May 2000
Recent structure functions results from neutrino scattering at Fermilab
Abstract
We report on the extraction of the structure functions F2,
ΔxF3 = xF3ν
- xF3(nubar), and Rlong =
σL / σT from CCFR
neutrino-nucleon differential cross sections. The extraction is performed in
a physics model independent (PMI) way for the first time. The
F2 (PMI) values measured in the CCFR neutrino experiment are
in good agreement with the F2 (NMC) measured in muon
scattering above Q2 = 1 GeV2, thus resolving the
long-standing discrepancy between the two sets of data. Comparison of the two
sets of data below Q2 = 1 GeV2, which provides
information on the axial vector contribution is also presented. The CCFR values
for Rlong are in good agreement with muon and electron data
for x>0.1. For x<0.1, Rlong for neutrinos
is somewhat larger than Rlong from muon and electron
scattering, as expected from the difference in charm production contributions.
We also report on an investigation of Rlong in neutrino
scattering for possible anomalous large nuclear effects (at low x and
Q2<1 GeV2) of the type recently reported by the
HERMES collaboration in electron scattering.
2:30pm, Smith Lab 4079
George T. Fleming
(
gfleming@mps.ohio-state.edu
),
last updated 10 May 2000.
