Published in Annals of Physics
•Antiferromagnetic Heisenberg–Kondo lattice model with itinerant Dirac fermions.•Integrating out the spins generates competing interactions: BCS-like, excitonic and magnetic.•Novel mechanism of superconductivity from magnetic interactions between the spins and electrons.•Dome-shaped dependence of the temperature on the chemical potential in agreeme...
Published in Annals of Physics
The Polchinski version of the exact renormalisation group equations is applied to multicritical fixed points, which are present for dimensions between two and four, for scalar theories using both the local potential approximation and its extension, the derivative expansion. The results are compared with the epsilon expansion by showing that the non...
Published in Annals of Physics
•First-quantized electrodynamics of the parametrized Dirac equation is developed.•Unrestricted entanglement in time is made explicit.•Bethe and Salpeter’s equation for relativistic bound states is derived without further conjecture.•One-loop scattering corrections and the axial anomaly are derived using a partial summation.•Wide utility of semi-cla...
Published in Annals of Physics
Properties of hot nuclear matter are studied by means of the thermodynamic Green's function approach under special consideration of the two-particle clustering in a nuclear environment. It has been found that the two-particle clustering is strongly suppressed due to Pauli blocking and quasiparticle effects if the density exceeds a critical value (M...
Published in Annals of Physics
A metric defined by ds 2 = [ (p 2 + q 2) P ] dp 2 + [ P (p 2 + q 2) ](dτ + q 2 dσ) 2 + [ (p 2+q 2) Q ] dq 2 − [ Q (p 2 + q 2) ](dτ − p 2 dσ) 2 , with P = P( p), Q = Q( q), is studied; the first sections investigate its connections and curvature; the metric is of type D, with Einstein tensor of the electromagnetic algebraic type. Metrics with R = co...
Published in Annals of Physics
This paper presents a critical discussion of some of the suggestions which have been put forward for measuring the nuclear momentum distribution F( p) and pair correlation function C(r 1r 2). On the basis of qualitative arguments we conclude that a majority of the measurements of F and C are based on dubious analysis of the experimental data. In pa...
Published in Few-Body Systems
The four-body system is studied in the limit of large two-body scattering length by solving momentum-space integral equations for the transition operators or, alternatively, configuration-space equations for wave function. A number of universal results for atom-trimer and dimer–dimer scattering observables are found. We furthermore address the ques...
Published in Annals of Physics
Helicity amplitudes are expressed via the spinor amplitudes in terms of the Joos invariant amplitudes which have been shown by Williams to be free from kinematical singularities. This procedure allows to analyze the kinematical singularities of helicity amplitudes and separate them out, which results in the definition of regularized helicity amplit...
Published in Annals of Physics
The results of a complete analysis of photographs obtained by the Columbia 36-in. magnet cloud chamber in neutral beams of the Brookhaven Cosmotron are presented. A “short-distance” exposure yielded 152 events giving unambiguous proof of the existence of long-lived neutral V-particles, most naturally interpreted as examples of K 2 0 disintegrations...
Published in Annals of Physics
A distorted-wave Born-approximation (DWBA) formalism is developed to describe the “elastic” and “inelastic” breakup of the projectile in the heavy-ion-induced reasctions. Using a “local momentum approximation” and the surface localization property of these reactions expressions for the DWBA transition amplitude are derived. One of the attractive fe...
