Quark distributions and gluon contents of eta and etaprime
  Using QCD sum rule, we calculate valance quark distribution functions of {\eta} and of {\eta}' in chiral limit. Extrapolating the calculated quark distribution functions at both end regions, their first two moments have been calculated and compared with those of other hadrons. 
Janardan P. Singh and Aditya B. Patel
hep-ph