The behavior of the V 0-π + scattering amplitude (where V 0 = ρ 0 , ω , or φ) in the low pion momentum limit is studied motivated by its relevance to the theory of muon g − 2. Current algebra analysis shows that its S-wave component must vanish in the chiral limit under general physical assumptions. We confirm this result with various low energy models of vector meson. Our result justifies the ...

It is shown that there is a double counting in the standard model of n¯ n mixing in the medium, resulting in full cancellation of leading terms. The direct calculation of n¯ n transition followed by annihilation is performed. The lower limit for the free-space n¯ n oscillation time is τ n¯ n ∼ T n¯ n > 10 16 y, where T n¯ n is the lifetime of neutron bound in a nucleus. This limit exceeds the p...

Using a generalized Rubinstein-Duke model, we prove rigorously that kinematic disorder leaves the prediction of the standard reptation theory for the scaling of the diffusion constant in the limit for long polymer chains D proportional to L(-2) unaffected. Based on an analytical calculation as well as on Monte Carlo simulations, we predict kinematic disorder to affect the center-of-mass diffusi...

We consider the Bjorken limit in the framework of the effective action approach and discuss its similarities to the Regge limit. The proposed effective action allows for a rather simple calculation of the known evolution kernels. We represent the result in terms of two-parton interaction operators involving gluon and quark operators depending on light-ray position and helicity and analyze their...

We report on a Ginzburg–Landau calculation of the stability of a boundary between A and B phases of superfluid He in a two-dimensional constriction. In the macroscopic limit the stability follows a well-known relation, which depends on the surface tension sAB of the A–B boundary. In the narrow-constriction limit the surface tension is not well defined, but the interface is always stable, and a ...

The calculation of the partition function for N M5-branes is addressed for the case in which the worldvolume wraps a manifold T 2 × M4, where M4 is simply connected and Kaehler. This is done in a compactification of M-theory which induces the Vafa-Witten theory on M4 in the limit of vanishing torus volume. The results follow from the equivalence of the BPS spectrum counting in the complementary...

The behavior of the V 0-π + scattering amplitude (where V 0 = ρ 0 , ω , or φ) in the low pion momentum limit is studied motivated by its relevance to the theory of muon g − 2. Current algebra analysis shows that its S-wave component must vanish in the chiral limit under general physical assumptions. We confirm this result with various low energy models of vector meson. Our result justifies the ...

We derive a continuum field theory for the Majumdar-Ghosh model in the large-S limit, where the field takes values in the manifold of the SO(3) group. No topological term is induced in the action and the cases for integer spin and half-integer spin appear to be indistinguishable. A one-loop β−function calculation indicates that the theory flows towards a strong coupling (disordered) phase at lo...

Thermodynamic properties of a Fermi system close to the unitarity limit, where the 2-body scattering length a approaches +/-infinity, are studied in the high temperature Boltzmann regime. For dilute systems the virial expansion coefficients in the Boltzmann regime are expected, from general arguments, to be universal. A model independent finite temperature T calculation of the third virial coef...

The main purpose of these lectures is to discuss briefly recent methods of calculation of statistical properties of quantum eigenvalues for chaotic systems based on semi-classical trace formulas. Under the assumption that periodic orbit actions are non-commensurable it is demonstrated by a few different methods that the spectral statistics of chaotic systems without time-reversal invariance in ...