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Title: Positronium Collapse and the Maximum Magnetic Field in Pure QED

Abstract

A maximum value for the magnetic field is determined, which provides the full compensation of the positronium rest mass by the binding energy in the maximum symmetry state and disappearance of the energy gap separating the electron-positron system from the vacuum. The compensation becomes possible owing to the falling to the center phenomenon. The maximum magnetic field may be related to the vacuum and describe its structure.

Authors:
 [1];  [2]
  1. P.N. Lebedev Physics Institute, Moscow 117924 (Russian Federation)
  2. Center for Astrophysics, Weizmann Institute of Science, Rehovot 76100 (Israel)
Publication Date:
OSTI Identifier:
20777216
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 96; Journal Issue: 18; Other Information: DOI: 10.1103/PhysRevLett.96.180401; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BINDING ENERGY; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; ENERGY GAP; MAGNETIC FIELDS; POSITRONIUM; POSITRONS; QUANTUM ELECTRODYNAMICS; REST MASS; SYMMETRY

Citation Formats

Shabad, A.E., and Usov, V.V. Positronium Collapse and the Maximum Magnetic Field in Pure QED. United States: N. p., 2006. Web. doi:10.1103/PhysRevLett.96.180401.
Shabad, A.E., & Usov, V.V. Positronium Collapse and the Maximum Magnetic Field in Pure QED. United States. doi:10.1103/PhysRevLett.96.180401.
Shabad, A.E., and Usov, V.V. Fri . "Positronium Collapse and the Maximum Magnetic Field in Pure QED". United States. doi:10.1103/PhysRevLett.96.180401.
@article{osti_20777216,
title = {Positronium Collapse and the Maximum Magnetic Field in Pure QED},
author = {Shabad, A.E. and Usov, V.V.},
abstractNote = {A maximum value for the magnetic field is determined, which provides the full compensation of the positronium rest mass by the binding energy in the maximum symmetry state and disappearance of the energy gap separating the electron-positron system from the vacuum. The compensation becomes possible owing to the falling to the center phenomenon. The maximum magnetic field may be related to the vacuum and describe its structure.},
doi = {10.1103/PhysRevLett.96.180401},
journal = {Physical Review Letters},
number = 18,
volume = 96,
place = {United States},
year = {Fri May 12 00:00:00 EDT 2006},
month = {Fri May 12 00:00:00 EDT 2006}
}
  • A hypercritical value for the magnetic field is determined which provides the full compensation of the positronium rest mass by the binding energy in the maximum-symmetry state and disappearance of the energy gap separating the electron-positron system from the vacuum. The compensation becomes possible owing to the falling-to-the-center phenomenon. The structure of the vacuum is described in terms of strongly localized states of tightly mutually bound (or confined) pairs. Their delocalization for a still higher magnetic field, capable of screening its further growth, is discussed.
  • The magnetic quenching of the triplet state of positronium (/ital o/-Ps) has been studied in pure /ital n/-hexane at 294 K, by applying an external magnetic field. The measured annihilation parameters are characteristic of a normal second-order Zeeman effect and betray some slight expansion of the Ps wave function as compared to /ital in/ /ital vacuo/. In the presence of nitrobenzene, which reacts with Ps to form a complex, very strong effects are observed, confirming previous experiments. The lifetime of the /ital o/-Ps (/ital m/=0) substate undergoes a drastic decrease, even at very low magnetic field strengths. A new approachmore » to this unexpected phenomenon is proposed, involving the reversible formation of a weak complex between Ps and the solute. Various quantitative treatments are attempted to fit the data. As it seems, the data can only be described if one supposes that there is no spin reorientation during the reaction. In all cases, the derived fitting parameters are characteristic of the complex, therefore denoting that the field effect does not intrinsically depend on solute concentration.« less