Effective-average-action-based approach to correlation functions at finite momenta
نویسندگان
چکیده
منابع مشابه
Effective-average-action-based approach to correlation functions at finite momenta.
We present a truncation scheme of the effective-average-action approach of the nonperturbative renormalization group that allows for an accurate description of the critical regime as well as of correlation functions at finite momenta. The truncation is a natural modification of the standard derivative expansion that includes both all local correlations and two-point and four-point irreducible c...
متن کاملCorrections to the electroweak effective action at finite temperature.
We calculate contributions to the finite temperature effective action for the electroweak phase transition (EWPT) at O(g), i.e. at second orders in (gT /M). This requires plasma-mass corrections in the calculation of the effective potential, inclusion of the “lollipop” diagram, corrections. We find the EWPT remains too weakly first-order to drive baryogenesis. We calculate some one loop kinetic...
متن کاملPseudoscalar Meson Temporal Correlation Function for Finite Momenta in HTL approach
The temporal pseudoscalar meson correlation function in a QCD plasma is investigated in a range of temperatures exceeding Tc and first time for a finite momenta which is of the experimental interest. The imaginary time formalism is employed for the finite temperature calculations. The behavior of the meson spectral function and of the temporal correlator is studied in the HTL approximation, whe...
متن کاملCritical Exponents from the Effective Average Action
We compute the critical behaviour of three-dimensional scalar theories using a new exact non-perturbative evolution equation. Our values for the critical exponents agree well with previous precision estimates.
متن کاملYang-Mills Effective Action from QCD at Finite Chemical Potential
We present a construction of an effective Yang-Mills action for QCD, from the expansion of the fermionic determinant in terms of powers of the chemical potential at high temperature for the case of massless quarks. We analyze this expansion in the perturbative region and find that it gives extra spurious information. We propose for the non-perturbative sector a simplified effective action which...
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: Physical Review E
سال: 2012
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.86.041118