Operator product expansion in static-quark effective field theory. Large perturbative correction
نویسندگان
چکیده
منابع مشابه
Operator product expansion in static-quark effective field theory: large perturbative correction
We calculate the coefficients of operators with dimensions d ≤ 7 in the operator product expansion of correlators of q̄ΓQ currents, for the effective field theory of an infinite-mass quark, Q. Exact two-loop results are obtained, with an arbitrary gauge group and spacetime dimension, for the perturbative (d = 0) and quark-condensate (d = 3) contributions, confirming our previous result for the a...
متن کاملOperator Product Expansion for Inclusive Semileptonic Decays in Heavy Quark Effective Field Theory
Inclusive semileptonic decays are discussed in the framework of heavy quark effective field theory by employing the short distance expansion in the effective theory. The lowest order term turns out to be the parton model; the higher order terms may be regarded as correction terms to the parton model result. The first nonvanishing corrections to the parton model result are given and the lepton e...
متن کاملOperator product expansion and non-perturbative renormalization
Here A, B, and C are operators; W C (x − y) are c-number functions (Wilson coefficients), singular when |x − y| → 0, that can be computed, for example, in perturbation theory. Dimensional analysis tells us that the leading contribution for y → x is due to the operators C’s in Eq. (1) that have the lowest dimension. Notice that the OPE is an operator relation and therefore, for any matrix elemen...
متن کاملOperator product expansion in the SL 2 conformal field theory
We discuss the operator product expansion (OPE) in the models with the SL2 affine symmetry. For this purpose, we calculate the correlation functions of the primary fields with definite SL2 weights. By using them and extending the arguments in the literature, we show that the OPE with one primary field in a degenerate representation is correctly obtained. We also study the OPE among the primary ...
متن کاملOperator Product Expansion in Logarithmic Conformal Field Theory
In logarithmic conformal field theory, primary fields come together with logarithmic partner fields on which the stress-energy tensor acts non-diagonally. Exploiting this fact and global conformal invariance of twoand three-point functions, operator product expansions of logarithmic operators in arbitrary rank logarithmic conformal field theory are investigated. Since the precise relationship b...
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: Physics Letters B
سال: 1992
ISSN: 0370-2693
DOI: 10.1016/0370-2693(92)92009-6