# Fermions, Anomaly and Unitarity in High-Energy Electroweak Scattering

@article{Guida1994FermionsAA,
title={Fermions, Anomaly and Unitarity in High-Energy Electroweak Scattering},
author={Riccardo Guida and Kenichi Konishi and Nicodemo Magnoli},
journal={arXiv: High Energy Physics - Phenomenology},
year={1994}
}
• Published 3 November 1993
• Physics
• arXiv: High Energy Physics - Phenomenology
We report the "state of the art" of the problem of $B+L$ violation in high-energy electroweak scatterings. Results of various analyses point toward (though do not prove rigorously yet) the "half-suppression", i.e., that the $B+L$ violating cross section remains suppressed at least by the negative exponent of the single instanton action, at all energies. Most interesting techniques developed in this field are reviewed. Particular attention is paid to unitarity constraints on the anomalous…
9 Citations
B+L violation at colliders and new physics
• Physics
• 2018
A bstractChiral electroweak anomalies predict baryon (B) and lepton (L) violating fermion interactions, which can be dressed with large numbers of Higgs and gauge bosons. The estimation of the total
Impact of new physics on B + L violation at colliders
• Physics
• 2019
In the Standard Model, chiral electroweak anomalies predict nonperturbative interactions that violate baryon ($B$) plus lepton number ($L$). The potential observability of these processes at
Electroweak baryon number non-conservation in the early Universe and in high-energy collisions
• Physics
• 1996
We review recent progress in the study of the anomalous baryon number non-conservation at high temperatures and in high energy collisions. Recent results on high temperature phase transitions are
An upper bound on the total cross-section for electroweak baryon number violation
An upper bound on the total cross-section of s-wave electroweak instanton/sphaleron induced baryon plus lepton number violating processes is presented. It is obtained by exploiting a recently
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
Band structure in Yang-Mills theories
• Physics
• 2016
A bstractWe show how Yang-Mills theory on S3 × ℝ can exhibit a spectrum with continuous bands if coupled either to a topological 3-form gauge field, or to a dynamical axion with heavy Peccei-Quinn
Instantons in deep-inelastic scattering: The simplest process
• Physics
• 1997
Instanton calculations in QCD are generically plagued by infrared divergencies associated with the integration over the instanton size ϱ. Here, we demonstrate explicitly that the typical inverse hard
Electroweak instantons as a solution to the ultrahigh-energy cosmic ray puzzle
• Physics
• 2003
Abstract We propose a scenario in which a simple power-like primary spectrum for protons with sources at cosmological distances leads to a quantitative description of all the details of the observed
Tunneling in a uniform one-dimensional superfluid: Emergence of a complex instanton
In a uniform ring-shaped one-dimensional superfluid, quantum fluctuations that unwind the order parameter need to transfer momentum to quasiparticles (phonons). We present a detailed calculation of

## References

SHOWING 1-10 OF 111 REFERENCES
The Whys of Subnuclear Physics
In the last few years an impressive series of spectacular results have been obtained in high-energy physics: notably, the discoveries of the neutral weak currents, of the new particles (J,ψ’s), of
Multi-W(Z) Production in High-Energy Collisions?
There exists the possibility that the cross-section for the nonperturbative production of many, ${\cal O}(\alpha_W^{-1} \simeq 30 )$, weak gauge bosons may be as large as \${\cal O}(100\ {\rm pb}\ -\
An example of semiclassical instanton-like scattering: (1 + 1)-dimensional sigma model
• Physics
• 1993
Abstract A solution to the classical field equations in the massless (1 + 1)-dimensional O(3) sigma model is found, which describes a multiparticle instanton-like transition at high energy. In the
Large Order Behaviour of Perturbation Theory
• Mathematics
• 1990
Introduction. References. Papers: 1. Methods and Simple Examples. 2. More Complex Systems. 3. Field Theories with Fermions. 4. Large-Order Behaviour: Difficulties, Applications. 5. Additional
Gauge fields, introduction to quantum theory
• Physics
• 1980
* Introduction: Fundamentals of Classical Gauge Field Theory * Quantum Theory in Terms of Path Integrals * Quantization of the Yang-Mills Field * Renormalization of Gauge Theories * Some Application
Quantum mechanics: Non-relativistic theory,
• Physics
• 1958
The basic concepts of quantum mechanics Energy and momentum Schrodinger's equation Angular momentum Perturbation theory Spin The identity of particles The atom The theory of symmetry Polyatomic
Table of Integrals, Series, and Products
• Mathematics, Engineering
• 1943
Introduction. Elementary Functions. Indefinite Integrals of Elementary Functions. Definite Integrals of Elementary Functions. Indefinite Integrals of Special Functions. Definite Integrals of Special
Univ
• Washington preprint, UW/PT-91-12
• 1991
Nucl
• Phys. B297
• 1988
Phys
• Lett. B168
• 1986