Threshold enhancement and the flavor-changing electromagnetic vertex

We analyze the evolution of the flavor-changing electromagnetic vertex as a function of the external initial quark mass {ital m}{sub {ital e}}, in the three-generation standard model. We find a substantial threshold enhancement in the vertex, to one-loop order, when {ital m}{sub {ital e}} is of the...

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Veröffentlicht in:	Physical review letters 1990-08, Vol.65 (7), p.827-830
Hauptverfasser:	DUTTA ROY, B, IRWIN, B. A, MARGOLIS, B, ROBINSON, J, TROTTIER, H. D, HAMZAOUI, C
Format:	Artikel
Sprache:	eng
Schlagworte:	645202 - High Energy Physics- Particle Interactions & Properties-Theoretical- Electromagnetic Interactions & Properties 645400 - High Energy Physics- Field Theory BASIC INTERACTIONS BEAUTY PARTICLES BOSONS Classical and quantum physics: mechanics and fields ELECTROMAGNETIC INTERACTIONS ELEMENTARY PARTICLES Exact sciences and technology FERMIONS FIELD THEORIES FUNCTIONS INTERACTIONS INTERMEDIATE BOSONS INTERMEDIATE VECTOR BOSONS KOBAYASHI-MASKAWA MATRIX MASS MATRICES PERTURBATION THEORY Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS POSTULATED PARTICLES QUANTUM CHROMODYNAMICS QUANTUM FIELD THEORY QUARKS RADIATIVE DECAY Theory of quantized fields TOP PARTICLES UNIFIED-FIELD THEORIES VERTEX FUNCTIONS
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Beschreibung
Zusammenfassung:	We analyze the evolution of the flavor-changing electromagnetic vertex as a function of the external initial quark mass {ital m}{sub {ital e}}, in the three-generation standard model. We find a substantial threshold enhancement in the vertex, to one-loop order, when {ital m}{sub {ital e}} is of the order of the mass of the {ital W} boson. We comment on QCD corrections.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.65.827