Non–Singlet QCD Analysis of the Structure Function F2 in 3-Loops
نویسندگان
چکیده
First results of a non–singlet QCD analysis of the structure function F2(x,Q ) in 3–loop order based on the non– singlet world data are presented. Correlated errors are determined and their propagation through the evolution equations is performed analytically. The value for αs(MZ) is determined to be 0.1135 + / − 0.0023/0.0026 compatible with results from other QCD analyses. Low moments for uv(x), dv(x) and uv(x)−dv(x) with correlated errors are calculated which may be compared with results from lattice simulations.
منابع مشابه
Towards Deep-inelastic Structure Functions at Three Loops
We report on the status of the calculation of deep-inelastic structure functions at three loops in perturbative QCD. The method employed allows to calculate the Mellin moments of structure functions analytically as a general function of N . As an illustration, we present the leading fermionic contributions to the non-singlet anomalous dimension of F2 at three loops and, as a new result, to the ...
متن کاملNext-to-next-to-leading order QCD analysis of DIS structure functions
It is performed for the first time a next-to-next-to-leading order analysis of deep inelastic structure functions F2 and FL using the recently determined first moments of the non-singlet anomalous dimensions and the corresponding Wilson coefficients. From a comparison to BCDMS data we found a slight decrease in the energy scale of perturbative QCD with respect to the next-toleading order analys...
متن کاملThe Mellin moments of deep inelastic structure functions at two loops
We perform the analytic calculation of the Mellin moments of the structure functions F2 and FL in perturbative QCD up to second order corrections and in leading twist approximation. We calculate the 2-loop contributions to the anomalous dimensions of the singlet and non-singlet operator matrix elements and the 2-loop coefficient functions of F2 and FL. Our results are in agreement with earlier ...
متن کاملDeep Inelastic Structure Functions at two Loops
We present the analytic calculation of the Mellin moments of the structure functions F2, F3 and FL in perturbative QCD up to second order corrections and in leading twist approximation. We calculate the 2-loop contributions to the anomalous dimensions of the singlet and non-singlet operator matrix elements and the 2-loop coefficient functions of F2, F3 and FL. We perform the inverse Mellin tran...
متن کاملar X iv : h ep - p h / 99 10 37 8 v 1 1 8 O ct 1 99 9 QCD analysis of xF 3 at NNLO : the theoretical uncertainties
The next-to-next-to-leading order (NNLO) QCD analysis of the experimental xF3 structure function from CCFR data is performed. The theoretical uncertainties of the analysis are discussed. The study of DIS structure functions has been a fruitful source of information on the structure of the proton and for testing perturbative QCD. Between the most outstanding results of the program of analyzing s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004