We propose a nonperturbative formulation of chiral gauge theories. The method involves a ‘pre-regulation’ of the gauge fields, which may be implemented on a lattice, followed by a computation of the chiral fermion determinant in the form of a functional integral which is regularized in the continuum. Our result for the chiral determinant is expressed in terms of the vector-like Dirac operator a...

We show how to incorporate chiral symmetry breaking in the soft-wall version of the AdS/QCD model by using a modified dilaton profile and a quartic term in the bulk scalar potential. This allows one to separate the dependence on spontaneous and explicit chiral symmetry breaking. Moreover our 5D model automatically incorporates linear trajectories and non chiral-symmetry restoration for highly e...

We use three-flavour hard pion Chiral Perturbation Theory (HPChPT) in both the heavy meson and a relativistic formulation to calculate the chiral logarithms m2 log ( m2/μ2 ) contributing to the formfactors of the B(s) → π,K, η and D(s) → π,K, η transitions at momentum transfer q2 away from the endpoint q2 max = (mB − mM ) 2. We compare our results with CLEO D → π and D → K data. We also calcula...

One of the problems encountered in CE separations of basic compounds is the adsorption of analytes onto the negatively charged capillary wall which could lead to poor repeatability of migration time and peak area. Additionally, separation of enantiomers of chiral of basic drugs is commonly carried out in low pH buffer which contributes to strong ionic interaction of the cationic drug ions with ...

We show that the leading SU(3)-breaking corrections to the ∆S = 1 f1 vector form factors of hyperons are O(ms) and O(m 3/2 s ), and are expected to be ∼ 20–30% by dimensional analysis. This is consistent with the Ademollo–Gatto theorem, in a sense that we explain. We compute the O(ms) corrections and a subset of the O(m 3/2 s ) corrections using an effective lagrangian in which the baryons are ...

D. Guadagnolia, V. Lubiczb,c, G. Martinellia, M. Papinuttod, S. Simulac, G. Villadoro†a a Dipartimento di Fisica, Università di Roma “La Sapienza”, and INFN, Sezione di Roma, P.le A. Moro 2, I-00185 Rome, Italy b Dip. di Fisica, Università di Roma Tre, Via della Vasca Navale 84, I-00146 Rome, Italy c INFN, Sezione di Roma III, Via della Vasca Navale 84, I-00146 Rome, Italy d John von Neumann-In...

We calculate the leading quark mass corrections of order mq log(mq), mq and m 3/2 q to the vector meson decay constants within Heavy Vector Meson Chiral Perturbation Theory. We discuss the issue of electromagnetic gauge invariance and the heavy mass expansion. Reasonably good fits to the observed decay constants are obtained.

Emerging trend in semiconductor nanotechnology motivates to design various crystalline nanotubes. The structural and electronic transport properties of single walled zigzag Gallium Arsenide nanotubes have been investigated using Density Functional Theory (DFT) and Non-Equilibrium Green’s Function (NEGF) based First Principle formalisms. Structural stability and enhanced electronic transmission ...

We solve the homogeneous Bethe-Salpeter (HBS) equation for the scalar, pseudoscalar, vector, and axial-vector bound states of quark and anti-quark in large Nf QCD with the improved ladder approximation in the Landau gauge. The quark mass function in the HBS equation is obtained from the SchwingerDyson (SD) equation in the same approximation for consistency with the chiral symmetry. Amazingly, d...

Based on schematic two-level models extended to a1-meson degrees of freedom, we investigate possible mechanisms of chiral restoration in the vector/axialvector channels in cold nuclear matter. In the first part of this article we employ the massive Yang-Mills framework to construct an effective chiral Lagrangian based on low-energy mesonic modes at finite density. The latter are identified thro...