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Séance de cours

Supersymétrie: termes doux et EW Symmetry Breaking

Dans cours

PHYS-817: Supersymmetry

Supersymmetry is the unique quantum extension of the symmetry principles of relativity. This course offers a first but broad introduction covering the role of Supersymmetry in our understanding of both physics beyond the Standard Model and non-perturbative ...

Description

Cette séance de cours couvre des sujets tels que les termes souples en supersymétrie, les couplages dimensionnels, les termes A, la rupture de symétrie EW dans le MSSM et la déstabilisation des termes V et D.

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Concepts associés (11)

Minimal Supersymmetric Standard Model

The Minimal Supersymmetric Standard Model (MSSM) is an extension to the Standard Model that realizes supersymmetry. MSSM is the minimal supersymmetrical model as it considers only "the [minimum] number of new particle states and new interactions consistent with "Reality". Supersymmetry pairs bosons with fermions, so every Standard Model particle has a superpartner yet undiscovered. If discovered, such superparticles could be candidates for dark matter, and could provide evidence for grand unification or the viability of string theory.

Supersymétrie

La supersymétrie (abrégée en SuSy) est une symétrie supposée de la physique des particules qui postule une relation profonde entre les particules de spin demi-entier (les fermions) qui constituent la matière et les particules de spin entier (les bosons) véhiculant les interactions. Dans le cadre de la SuSy, chaque fermion est associé à un « superpartenaire » de spin entier, alors que chaque boson est associé à un « superpartenaire » de spin demi-entier.

Supersymmetry breaking

In particle physics, supersymmetry breaking is the process to obtain a seemingly non-supersymmetric physics from a supersymmetric theory which is a necessary step to reconcile supersymmetry with actual experiments. It is an example of spontaneous symmetry breaking. In supergravity, this results in a slightly modified counterpart of the Higgs mechanism where the gravitinos become massive. Supersymmetry breaking occurs at supersymmetry breaking scale.

R-parity

R-parity is a concept in particle physics. In the Minimal Supersymmetric Standard Model, baryon number and lepton number are no longer conserved by all of the renormalizable couplings in the theory. Since baryon number and lepton number conservation have been tested very precisely, these couplings need to be very small in order not to be in conflict with experimental data. R-parity is a symmetry acting on the Minimal Supersymmetric Standard Model (MSSM) fields that forbids these couplings and can be defined as or, equivalently, as where s is spin, B is baryon number, and L is lepton number.

Split supersymmetry

In particle physics, split supersymmetry is a proposal for physics beyond the Standard Model. It was proposed separately in three papers. The first by James Wells in June 2003 in a more modest form that mildly relaxed the assumption about naturalness in the Higgs potential. In May 2004 Nima Arkani-Hamed and Savas Dimopoulos argued that naturalness in the Higgs sector may not be an accurate guide to propose new physics beyond the Standard Model and argued that supersymmetry may be realized in a different fashion that preserved gauge coupling unification and has a dark matter candidate.

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Séances de cours associées (13)

Dilaton croquant, nature cachée

Examine le problème de naturalité dans les finitions UV du Modèle Standard et propose un mécanisme lié à la masse de Higgs déterminant l'expansion de l'univers.

Supersymétrie: Lecture 5

Explore la rupture de la supersymétrie, Goldstinos, théorème de Nambu-Goldstone et les implications de la médiation dans le MSSM.

Supersymétrie : Masse SUSY requise et corrections quatriques de Higgs

Couvre la masse SUSY requise pour un boson de Higgs de 125 GeV et des corrections d'une boucle au LHC, ainsi que l'unification du couplage de jauge et la violation de la saveur.

Supersymétrie : Motivations et applications concrètes

Explore les motivations et les applications de la supersymétrie, y compris la théorie des cordes et les symétries de saveur, aboutissant au théorème de Coleman-Mandula.

Supersymétrie : Lagrangiens et théories renormalisables

Couvre les bases de la supersymétrie, des lagrangiens et des théories renormalisables.

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Concepts associés (11)

Minimal Supersymmetric Standard Model

Supersymétrie

Supersymmetry breaking

R-parity

Split supersymmetry

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