Moments of the proton structure function F2


The measurement of the inclusive electron-proton scattering cross section, together with existing world data, allowed for the evaluation of the F2 experimental moments, drastically reducing the uncertainties related to data interpolation and providing the most detailed dependence on Q2 of the moments up to n=8. We studied the Q2 evolution of obtained moments, Mn(Q2), in order to estimate higher twist contribution as a function of Q2. The small statistical and systematic uncertainties of the CLAS data allow a precise extraction of the higher twists and will require significant improvements in theoretical predictions if a meaningful comparison with these new experimental results is to be made.

The data are published in M. Osipenko et al., Phys. Rev. D67 092001 (2003).

Twist Analysis for M2

  In the Figures you can see the extracted experimental moments of the structure function F2 and the twist separation for the second moment M2.

Tables of obtained proton F2 structure function inelastic moments with their statistical and systematic errors is available in ASCI format here:
ASCI Table of M2(Q2).
ASCI Table of M4(Q2).
ASCI Table of M6(Q2).
ASCI Table of M8(Q2).