Decay of Resonaces in Strong Magnetic Field

Peter Filip

doi:10.1088/1742-6596/636/1/012013

Abstract

We suggest that decay properties (branching ratios) of hadronic resonances may become modified in strong external magnetic field. The behavior of K±*, K0* vector mesons as well as Λ* (1520) and Ξ0* baryonic states is considered in static fields 1013-1015 T. In particular, n = 0 Landau level energy increase of charged particles in the external magnetic field, and the interaction of hadron magnetic moments with the field is taken into account. We suggest that enhanced yield of dileptons and photons from ρ0(770) mesons may occur if strong decay channel ρ0 → π+π- is significantly suppressed. CP – violating π+π- decays of pseudoscalar ηc and η(547) mesons in the magnetic field are discussed, and superpositions of quarkonium states ηc,b and χc,b(nP) with Ψ(nS), ϒ(nS) mesons in the external field are considered.

Highlights

Modification of ρ(770) decay properties in the magnetic field has been considered in relation to the possibility of ρ± meson condensation [1] in sufficiently strong static magnetic fields
That e.g. only 3% of ρ0 mesons produced in heavy ion collision have π+π− decay channel closed, branching ratios from the right side of Table 1 can generate the excess of photons or dileptons many times above the expected yield, without noticeably lowering the amount of ρ0 → π+π− decays from the remaining (97% unaffected) ρ0 mesons
We have studied the influence of external magnetic and motional electric field on decay properties of mesons and baryonic resonances

Summary

Introduction

Modification of ρ(770) decay properties in the magnetic field has been considered in relation to the possibility of ρ± meson condensation [1] in sufficiently strong static magnetic fields. Decay ρ0 → π+π− becomes energetically forbidden in fields B > Bcr. Magnetic moment μρ0 of ρ0 meson (uu − dd)/√2 state is usually [1] considered to be zero, neglecting in this way quadratic Zeeman interaction [5] of ρ0(sz = 0) substate (see the behavior of ortho-Positronium (e+e−) J = 1 state in magnetic field [8]).

Results

Conclusion