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Electroweak instantons/sphalerons at VLHC?
There is a close analogy between electroweak instanton-induced baryon plus lepton number (B+L) violating processes in Quantum Flavor Dynamics (QFD) and hard QCD instanton-induced chirality violating processes in deep-inelastic scattering. In view of the recent information about the latter both from...
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Lenguaje: | eng |
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2002
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Acceso en línea: | https://dx.doi.org/10.1016/S0370-2693(03)00060-1 http://cds.cern.ch/record/595678 |
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author | Ringwald, Andreas |
author_facet | Ringwald, Andreas |
author_sort | Ringwald, Andreas |
collection | CERN |
description | There is a close analogy between electroweak instanton-induced baryon plus lepton number (B+L) violating processes in Quantum Flavor Dynamics (QFD) and hard QCD instanton-induced chirality violating processes in deep-inelastic scattering. In view of the recent information about the latter both from lattice simulations and from the H1 experiment at HERA, it seems worthwhile to reconsider electroweak B+L violation at high energies. We present a state of the art evaluation of QFD instanton-induced parton-parton cross-sections, as relevant at future high energy colliders in the hundreds of TeV regime, such as the projected Very Large Hadron Collider (VLHC). We find that the cross-sections are unobservably small in a conservative fiducial kinematical region inferred from the above mentioned QFD--QCD analogy. An extrapolation -- still compatible with lattice results and HERA -- beyond this conservative limit indicates possible observability at VLHC. |
id | cern-595678 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2002 |
record_format | invenio |
spelling | cern-5956782019-09-30T06:29:59Zdoi:10.1016/S0370-2693(03)00060-1http://cds.cern.ch/record/595678engRingwald, AndreasElectroweak instantons/sphalerons at VLHC?Particle Physics - PhenomenologyThere is a close analogy between electroweak instanton-induced baryon plus lepton number (B+L) violating processes in Quantum Flavor Dynamics (QFD) and hard QCD instanton-induced chirality violating processes in deep-inelastic scattering. In view of the recent information about the latter both from lattice simulations and from the H1 experiment at HERA, it seems worthwhile to reconsider electroweak B+L violation at high energies. We present a state of the art evaluation of QFD instanton-induced parton-parton cross-sections, as relevant at future high energy colliders in the hundreds of TeV regime, such as the projected Very Large Hadron Collider (VLHC). We find that the cross-sections are unobservably small in a conservative fiducial kinematical region inferred from the above mentioned QFD--QCD analogy. An extrapolation -- still compatible with lattice results and HERA -- beyond this conservative limit indicates possible observability at VLHC.hep-ph/0212099DESY-02-157DESY-2002-157oai:cds.cern.ch:5956782002-12-06 |
spellingShingle | Particle Physics - Phenomenology Ringwald, Andreas Electroweak instantons/sphalerons at VLHC? |
title | Electroweak instantons/sphalerons at VLHC? |
title_full | Electroweak instantons/sphalerons at VLHC? |
title_fullStr | Electroweak instantons/sphalerons at VLHC? |
title_full_unstemmed | Electroweak instantons/sphalerons at VLHC? |
title_short | Electroweak instantons/sphalerons at VLHC? |
title_sort | electroweak instantons/sphalerons at vlhc? |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/S0370-2693(03)00060-1 http://cds.cern.ch/record/595678 |
work_keys_str_mv | AT ringwaldandreas electroweakinstantonssphaleronsatvlhc |