Chiral structure of vector and axial-vector tetraquark currents
نویسندگان
چکیده
منابع مشابه
The vector and axial currents in Wilson chiral perturbation theory
We reconsider the construction and matching of the vector and axial currents in Wilson Chiral Perturbation Theory (WChPT), the low-energy effective theory for lattice QCD with Wilson fermions. In particular, we discuss in detail the impact of the finite renormalization of the currents on their matching from the lattice theory to WChPT. We explicitly show that imposing chiral Ward-Takahashi iden...
متن کاملDivergence Conditions for Vector and Axial Vector Currents
Equations for the divergence of the vector and axial-vector currents follow from the assumptions of Lorentz invariance, locality, the chiral SU(3) X SU(3) algebra of current densities (time components), and the usual electromagnetic and weak Hamiltonians. The divergence conditions lead to derivations of the low-energy meson theorems which do not involve " Schwinger " terms.
متن کاملAxial-vector currents and τ mesonic decays
A general expression of the axial-vector current is presented, in which both the effects of the chiral symmetry breaking and the spontaneous chiral symmetry breaking are included. A new resonance formula of the axial-vector meson is derived and in the limit of q → 0 this formula doesn’t go back to the “chiral limit“. The studies show that the dominance of the axial-vector meson is associated wi...
متن کاملRecoil order chiral corrections to baryon octet axial vector currents and large Nc QCD
We compute the chiral corrections to octet baryon axial vector currents through O(p3) in heavy baryon chiral perturbation theory, including both octet and decuplet baryon intermediate states. We include the latter in a consistent way by using the small scale expansion. We find that, in contrast to the situation at O(p2), there exist no cancellations between octet and decuplet contributions at O...
متن کاملChiral symmetry restoration and axial vector renormalization for Wilson fermions
Lattice gauge theories with Wilson fermions break chiral symmetry. In the U(1) axial vector current this manifests itself in the anomaly. On the other hand it is generally expected that the axial vector flavour mixing current is non-anomalous. We give a short, but strict proof of this to all orders of perturbation theory, and show that chiral symmetry restauration implies a unique multiplicativ...
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: The European Physical Journal C
سال: 2013
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s10052-013-2628-y