Optimization of QCD perturbation theory: Results for at fourth order

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Further results on O ( a ) improved lattice QCD to one - loop order of perturbation theory

We present results at one-loop order of perturbation theory for various improvement coefficients in on-shell O(a) improved lattice QCD. In particular we determine the additive counterterm required for on-shell improvement of the isovector vector current. Employing a general mass-independent renormalization scheme we also obtain the coefficients of the O(a) counterterms which are proportional to...

متن کامل

Chiral perturbation theory for lattice QCD at O(a)

Chiral perturbation theory (χPT) is widely used in analyzing lattice QCD data. Since χPT describes continuum QCD one has to take the continuum limit first before fitting the lattice data to the analytic predictions of χPT. Unfortunately, lattice data for various lattice spacings is often not available in order to perform a reliable continuum extrapolation. Nevertheless, it is common practice to...

متن کامل

Confronting Instanton Perturbation Theory with QCD Lattice Results

We exploit a recent lattice investigation (UKQCD) on the topological structure of the (quenched) QCD vacuum, in order to gain information on crucial building blocks of instanton perturbation theory. A central motivation is to further constrain our previous predictions of instanton-induced hard scattering processes. First, we address the generic problem of extracting quantitative information fro...

متن کامل

Basics of Qcd Perturbation Theory

This is an introduction to the use of QCD perturbation theory, emphasizing generic features of the theory that enable one to separate short-time and long-time e ects. I also cover some important classes of applications: electron-positron annihilation to hadrons, deeply inelastic scattering, and hard processes in hadron-hadron collisions. Supported by DOE Contract DE-FG03-96ER40969.

متن کامل

Qcd at Complex Coupling, Large Order in Perturbation Theory and the Gluon Condensate

We discuss the relationship between the large order behavior of the perturbative series for the average plaquette in pure gauge theory and singularities in the complex coupling plane. We discuss simple extrapolations of the large order for this series. We point out that when these extrapolated series are subtracted from the Monte Carlo data, one obtains (naive) estimates of the gluon condensate...

متن کامل

ذخیره 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: 2013

ISSN: 0550-3213

DOI: 10.1016/j.nuclphysb.2012.11.005