Power corrections to flavour-singlet structure functions
نویسندگان
چکیده
منابع مشابه
Renormalon Model Predictions for Power-Corrections to Flavour Singlet Deep Inelastic Structure Functions
We analyze power corrections to flavour singlet deep inelastic scattering structure functions in the framework of the infrared renormalon model. Our calculations, together with previous results for the non-singlet contribution, allow to model the x-dependence of higher twist corrections to F2, FL and g1 in the whole x domain. PACS numbers: 12.38.Cy, 13.60.Hb, 12.38.-t
متن کاملThe Leading Power Corrections to the Structure Functions
We show that when Bjorken xB is large, the leading order twist-four contributions to the structure functions can be expressed in terms of the derivatives of the normal twist-two parton distributions. Our analytical results are not only consistent with the parameterized power corrections extracted from the data, but also predict the flavor dependence of the power corrections. We also discuss the...
متن کاملNuclear enhanced power corrections to DIS structure functions
We calculate nuclear enhanced power corrections to structure functions measured in deeply inelastic lepton-nucleus scattering in Quantum Chromodynamics (QCD). We find that the nuclear medium enhanced power corrections at order of O(αs/Q 2) enhance the longitudinal structure function FL, and suppress the transverse structure function F1. We demonstrate that strong nuclear effects in σA/σD and RA...
متن کاملPower Corrections to Fragmentation Functions in Non-Singlet Deep Inelastic Scattering
We investigate the power-suppressed corrections to the fragmentation functions of the current jet in non-singlet deep inelastic lepton-hadron scattering. The current jet is defined by selecting final-state particles in the current hemisphere in the Breit frame of reference. Our method is based on an analysis of one-loop Feynman graphs containing a massive gluon, which is equivalent to the evalu...
متن کاملPower Corrections and Renormalons in Deep Inelastic Structure Functions
We study the power corrections (infrared renormalon contributions) to the coefficient functions for non-singlet deep inelastic structure functions due to gluon vacuum polarization insertions in one-loop graphs. Remarkably, for all the structure functions F1, F2, F3 and g1, there are only two such contributions, corresponding to 1/Q 2 and 1/Q power corrections. We compute their dependence on Bjo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1999
ISSN: 0550-3213
DOI: 10.1016/s0550-3213(99)00043-7