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Heavy-ion collisions and a new phase of QED

Technical Report:

Abstract

We argue that the ``anomalous`` narrow peaks, seen in the e{sup +}e{sup -} spectrum of heavy-ion collisions, at energies near the Coulomb barrier, may be due to the fact that the effective coupling of the e{sup +}e{sub -} system to the coherent electromagnetic EM-field of the two nuclei, can be of order one at impact parameters comparable (or smaller) to the e{sup -} Compton wavelength. It is conceivable that the excitation of a large number of virtual and real pairs within a Compton volume could result in momentum correlations for the e{sup +} and e{sup -}, or even lead to a ``new phase`` of quantum electrodynamics (QED) with a different mass scale for the electron. The presence of similar anomalies in the e{sup +}e{sup -} spectrum of relativistic, but exclusively coherent, collisions of heavy nuclei, would support this idea and rule out any interpretation based on spontaneous emission from a supercritical QED vacuum. In addition, the use of e{sup +}e{sup -} interferometry could help in clarifying the crucial point of whether the emitted pairs stem from a new or the well-known phase of QED. (author).
Authors:
Publication Date:
Jun 01, 1992
Product Type:
Technical Report
Report Number:
RAL-92-038
Reference Number:
SCA: 663450; PA: AIX-24:003863; SN: 93000913960
Resource Relation:
Other Information: PBD: Jun 1992
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; HEAVY ION REACTIONS; ELECTRON-POSITRON COLLISIONS; QUANTUM ELECTRODYNAMICS; COULOMB FIELD; IMPACT PARAMETER; PERIPHERAL COLLISIONS; 663450; HEAVY-ION-INDUCED REACTIONS AND SCATTERING
OSTI ID:
10109196
Research Organizations:
Rutherford Appleton Lab., Chilton (United Kingdom)
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Other: ON: DE93610095; TRN: GB9203058003863
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
GBN
Size:
[13] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Papageorgiu, E. Heavy-ion collisions and a new phase of QED. United Kingdom: N. p., 1992. Web.
Papageorgiu, E. Heavy-ion collisions and a new phase of QED. United Kingdom.
Papageorgiu, E. 1992. "Heavy-ion collisions and a new phase of QED." United Kingdom.
@misc{etde_10109196,
title = {Heavy-ion collisions and a new phase of QED}
author = {Papageorgiu, E}
abstractNote = {We argue that the ``anomalous`` narrow peaks, seen in the e{sup +}e{sup -} spectrum of heavy-ion collisions, at energies near the Coulomb barrier, may be due to the fact that the effective coupling of the e{sup +}e{sub -} system to the coherent electromagnetic EM-field of the two nuclei, can be of order one at impact parameters comparable (or smaller) to the e{sup -} Compton wavelength. It is conceivable that the excitation of a large number of virtual and real pairs within a Compton volume could result in momentum correlations for the e{sup +} and e{sup -}, or even lead to a ``new phase`` of quantum electrodynamics (QED) with a different mass scale for the electron. The presence of similar anomalies in the e{sup +}e{sup -} spectrum of relativistic, but exclusively coherent, collisions of heavy nuclei, would support this idea and rule out any interpretation based on spontaneous emission from a supercritical QED vacuum. In addition, the use of e{sup +}e{sup -} interferometry could help in clarifying the crucial point of whether the emitted pairs stem from a new or the well-known phase of QED. (author).}
place = {United Kingdom}
year = {1992}
month = {Jun}
}