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Fermion family recurrences in the Dyson-Schwinger formalism

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Llanes Estrada, Felipe José and Van Cauteren, Tim and Martin, Angel P (2007) Fermion family recurrences in the Dyson-Schwinger formalism. European Physical Journal C, 51 (4). pp. 945-952. ISSN 1434-6044

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Official URL: http://dx.doi.org/10.1140/epjc/s10052-007-0349-9




Abstract

We study the multiple solutions of the truncated propagator Dyson-Schwinger equation for a simple fermion theory with Yukawa coupling to a scalar field. Upon increasing the coupling constant g, other parameters being fixed, more than one non-perturbative solution breaking chiral symmetry becomes possible and we find these numerically. These "recurrences" appear as a mechanism to generate different fermion generations as quanta of the same fundamental field in an interacting field theory, without assuming any composite structure. The number of recurrences or flavors is reduced to the question of the value of the Yukawa coupling, and it has no special profound significance in the standard model. The resulting mass function can have one or more nodes and the measurement that potentially detects them can be thought of as a collider-based test of the virtua dispersion relation E = root p(2) + M(p(2))(2) for the charged lepton member of each family. This requires the three independent measurements of the charged lepton's energy, three-momentum and off-shellness. We illustrate how this can be achieved for the (more difficult) case of the tau lepton.


Item Type:Article
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© Springer-Verlag / Società Italiana di Fisica 2007.
This work has been performed in the framework of the research projects FPA 2004-02602, 2005-02327, PR27/05-13955-BSCH (Spain) and is part of the Masters thesis of Mr. Páramo Martín presented to the faculty of U. Complutense). TVC is a postdoctoral fellow for the Fund for Scientific Research - Flanders and acknowledges the support of the “Programa de Investigadores Extranjeros en la UCM - Grupo Santander

Uncontrolled Keywords:Symmetry-Breaking, Chiral Symmetry, Quark-Model, Mesons, Masses
Subjects:Sciences > Physics
ID Code:23047
Deposited On:08 Oct 2013 11:43
Last Modified:12 Feb 2015 08:33

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