Vevacious: a tool for finding the global minima of one-loop effective potentials with many scalars

Please always quote using this URN: urn:nbn:de:bvb:20-opus-132110
  • Several extensions of the Standard Model of particle physics contain additional scalars implying a more complex scalar potential compared to that of the Standard Model. In general these potentials allow for charge- and/or color-breaking minima besides the desired one with correctly broken SU(2) L ×U(1) Y . Even if one assumes that a metastable local minimum is realized, one has to ensure that its lifetime exceeds that of our universe. We introduce a new program called Vevacious which takes a generic expression for a one-loop effective potentialSeveral extensions of the Standard Model of particle physics contain additional scalars implying a more complex scalar potential compared to that of the Standard Model. In general these potentials allow for charge- and/or color-breaking minima besides the desired one with correctly broken SU(2) L ×U(1) Y . Even if one assumes that a metastable local minimum is realized, one has to ensure that its lifetime exceeds that of our universe. We introduce a new program called Vevacious which takes a generic expression for a one-loop effective potential energy function and finds all the tree-level extrema, which are then used as the starting points for gradient-based minimization of the one-loop effective potential. The tunneling time from a given input vacuum to the deepest minimum, if different from the input vacuum, can be calculated. The parameter points are given as files in the SLHA format (though is not restricted to supersymmetric models), and new model files can be easily generated automatically by the Mathematica package SARAH. This code uses HOM4PS2 to find all the minima of the tree-level potential, PyMinuit to follow gradients to the minima of the one-loop potential, and CosmoTransitions to calculate tunneling times.show moreshow less

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Metadaten
Author: J.E. Camago-Molina, B. O'Leary, W. Porod, F. Staub
URN:urn:nbn:de:bvb:20-opus-132110
Document Type:Journal article
Faculties:Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik
Language:English
Parent Title (English):European Physical Journal C
Year of Completion:2013
Volume:73
Issue:2588
Source:European Physical Journal C (2013) 73:2588 DOI 10.1140/epjc/s10052-013-2588-2
DOI:https://doi.org/10.1140/epjc/s10052-013-2588-2
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Tag:CMSSM Point; Charged Scalar Field; False Vacuum; Gauge-dependent Quantity; Homotopy Continuation Method; Landau Gauge; Minimal Surface Tension; One-loop Effective Potential; Renormalization Scale; SLHA File; SM Gauge Group; Saddle Point; Spectrum Generator; True Vacuum; Tunneling Time
Release Date:2016/06/11
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung