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On the existence of a new constrained instanton and high-energy electroweak interactions

Technical Report:

Abstract

The authors construct, in the SU(2) Yang-Mills-Higgs theory of the electroweak interactions, a non-contractible loop of 4-dimensional configurations. Numerical results for the action over the loop show the existence of a new constrained instanton I* with action {approx} 16{pi}{sup 2}/g{sup 2} and zero topological charge. They also discuss the spectral flow of the Dirac operator along the loop and I* is expected to have fermion-zero modes. As a possible application the total B+L violating cross-section is considered, evaluated semiclassically from the imaginary part of the forward elastic scattering amplitude. The numerical results for I* indicate a threshold-like behaviour for non-perturbative effects at a parton center-of-mass energy close to the sphaleron energy E{sub S}{approx}10 TeV. (author). 31 refs.; 9 figs.
Authors:
Klinkhamer, F R [1] 
  1. CHEAF, Amsterdam (Netherlands)
Publication Date:
Jun 01, 1991
Product Type:
Technical Report
Report Number:
NIKHEF-H-91-13
Reference Number:
SCA: 662210; PA: AIX-23:012980; SN: 92000638845
Resource Relation:
Other Information: PBD: Jun 1991
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; INSTANTONS; NUMERICAL SOLUTION; WEINBERG LEPTON MODEL; HIGGS MODEL; SU-2 GROUPS; YANG-MILLS THEORY; 662210; UNIFIED THEORIES AND MODELS
OSTI ID:
10111577
Research Organizations:
Nationaal Inst. voor Kernfysica en Hoge-Energiefysica (NIKHEF), Amsterdam (Netherlands). Sectie H
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Other: ON: DE92614181; TRN: NL91C0873012980
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
NLN
Size:
27 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Klinkhamer, F R. On the existence of a new constrained instanton and high-energy electroweak interactions. Netherlands: N. p., 1991. Web.
Klinkhamer, F R. On the existence of a new constrained instanton and high-energy electroweak interactions. Netherlands.
Klinkhamer, F R. 1991. "On the existence of a new constrained instanton and high-energy electroweak interactions." Netherlands.
@misc{etde_10111577,
title = {On the existence of a new constrained instanton and high-energy electroweak interactions}
author = {Klinkhamer, F R}
abstractNote = {The authors construct, in the SU(2) Yang-Mills-Higgs theory of the electroweak interactions, a non-contractible loop of 4-dimensional configurations. Numerical results for the action over the loop show the existence of a new constrained instanton I* with action {approx} 16{pi}{sup 2}/g{sup 2} and zero topological charge. They also discuss the spectral flow of the Dirac operator along the loop and I* is expected to have fermion-zero modes. As a possible application the total B+L violating cross-section is considered, evaluated semiclassically from the imaginary part of the forward elastic scattering amplitude. The numerical results for I* indicate a threshold-like behaviour for non-perturbative effects at a parton center-of-mass energy close to the sphaleron energy E{sub S}{approx}10 TeV. (author). 31 refs.; 9 figs.}
place = {Netherlands}
year = {1991}
month = {Jun}
}