Chiral Perturbation Theory Beyond One Loop
نویسنده
چکیده
The existing Chiral Perturbation Theory (ChPT) calculations at order p6 are reviewed. The principles of ChPT and how they are used are introduced. The main part is a review of the twoand three-flavour full two-loop calculations and their comparison with experiment. We restrict the discussion to the mesonic purely strong and semileptonic sector. The review concludes by mentioning the existing results in finite volume, finite temperature and partially quenched ChPT. Chiral Perturbation Theory Beyond One Loop
منابع مشابه
ar X iv : h ep - l at / 9 70 90 90 v 1 2 3 Se p 19 97 1 Quenched Chiral Perturbation Theory to one loop ∗
The divergences of the generating functional of quenched Chiral Perturbation theory (qCHPT) to one loop are computed in closed form. We show how the quenched chiral logarithms can be reabsorbed in the renormalization of the B0 parameter of the leading order Lagrangian. Finally, we do the chiral power counting for the quenched case and show that also finite loop corrections may diverge in the ch...
متن کاملQuenched Chiral Perturbation Theory to one loop
We calculate the divergences of the generating functional of quenched Chiral Perturbation Theory at one loop, and renormalize the theory by an appropriate definition of the counterterms. We show that the quenched chiral logarithms can be accounted for by defining a renormalized B0 parameter which, at lowest order, is proportional to the vacuum expectation value of the scalar quark density. Fina...
متن کاملGeneralized parton distributions for the nucleon in chiral perturbation theory
We complete the analysis of twist-two generalized parton distributions of the nucleon in one-loop order of heavy-baryon chiral perturbation theory. Extending our previous study of the chiral-even isosinglet sector, we give results for chiral-even isotriplet distributions and for the chiral-odd sector. We also calculate the one-loop corrections for the chiral-odd generalized parton distributions...
متن کاملtau decays and chiral perturbation theory.
In a small window of phase space, chiral perturbation theory can be used to make standard model predictions for tau decays into two and three pions. For τ → 2πντ , we give the analytical result for the relevant form factor FV up to two loops, then calculate the differential spectrum and compare with available data. For τ → 3πντ , we have calculated the hadronic matrix element to one loop. We di...
متن کاملRenormalization of Relativistic Baryon Chiral Perturbation Theory and Power Counting
We discuss a renormalization scheme for relativistic baryon chiral perturbation theory which provides a simple and consistent power counting for renormalized diagrams. The method involves finite subtractions of dimensionally regularized diagrams beyond the standard MS scheme of chiral perturbation theory to remove contributions violating the power counting. This is achieved by a suitable renorm...
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 2008