Strong and Electromagnetic Collective Effects from NA61/SHINE

Disoriented Chiral Condensate and Strong Electromagnetic Fields

We discuss the effect of strong electromagnetic fields on chiral orientation in the framework of the linear σ model. Based on lessons we learn from computation of the effective potential at one loop, we argue that the chiral U(1) anomaly dominates chiral disorientation driven by electromagnetism. We show that the anomaly effect induces a quasi-instantaneous “kick” to field configurations along ...

Instability of Collective Strong-interaction Phenomena in Hadron Production as a Possible Origin of the Weak and Electromagnetic Interactions*

A systematic calculus of long-range Regge cut effects in multiparticle production is constructed in the form of an infra-reddivergent stochastic field theory. Total cross-sections and two-body overlap integrals in such a theory may depend very sensitively upon internal quantum-lumbers of incident particles, resulting in a strong symmetry breaking at ultra-high energies. Such symmetry violations...

Electromagnetic Shocks in Strong Magnetic Fields

The nonlinear properties of electromagnetic waves traveling through a magnetized vacuum is of particular interest in the study of neutron stars. Heisenberg and Euler [1] and Weisskopf [2] first derived nonlinear corrections to the Maxwell equations of the electromagnetic field. Lutzky and Toll [3] and Zheleznyakov and Fabrikant [4] applied the weak-field expansion to show that shock waves can d...

Vacuum birefringence in strong inhomogeneous electromagnetic fields

Anisotropy and strong-coupling effects on the collective mode spectrum of chiral superconductors: application to Sr2RuO41

Recent theories of Sr2RuO4 based on the interplay of strong interactions, spin-orbit coupling and multi-band anisotropy predict chiral or helical ground states with strong anisotropy of the pairing states, with deep minima in the excitation gap, as well as strong phase anisotropy for the chiral ground state. We develop time-dependent mean field theory to calculate the Bosonic spectrum for the c...