Singlet Extensions of the MSSM withZ4RSymmetry

Advances in High Energy Physics ◽

10.1155/2015/785217 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 2

Author(s):

Michael Ratz ◽

Patrick K. S. Vaudrevange

Keyword(s):

Mass Term ◽

Hierarchy Problem ◽

Gravitino Mass ◽

Term Linear ◽

Little Hierarchy Problem ◽

Large Coefficient

We discuss singlet extensions of the MSSM withZ4Rsymmetry. We show that holomorphic zeros can avoid a potentially large coefficient of the term linear in the singlet. The emerging model has both an effectiveμterm and a supersymmetric mass term for the singletμNwhich are controlled by the gravitino mass. Theμterm turns out to be suppressed againstμNby about one or two orders of magnitude. We argue that this class of models might provide us with a solution to the little hierarchy problem of the MSSM.

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Stability of the Higgs sector in a flavor-inspired multi-scale model

Journal of High Energy Physics ◽

10.1007/jhep01(2021)191 ◽

2021 ◽

Vol 2021 (1) ◽

Author(s):

Lukas Allwicher ◽

Gino Isidori ◽

Anders Eller Thomsen

Keyword(s):

Good Description ◽

Higgs Sector ◽

Mass Term ◽

Scale Model ◽

Hierarchy Problem ◽

Site Model ◽

Multi Scale ◽

Fifth Dimension ◽

Little Hierarchy Problem ◽

The Stability

Abstract We analyze the stability of the Higgs sector of a three-site model with flavor-non-universal gauge interactions, whose spectrum of non-Standard-Model states spans three orders of magnitude. This model is inspired by deconstructing a five-dimensional theory where the generation index is in one-to-one relation to the position in the fifth dimension. It provides a good description of masses and mixing of the SM fermions in terms of scale hierarchies. We demonstrate that, within this construction, the mass term of the SM-like Higgs does not receive large corrections proportional to the highest mass scales. The model suffers only of the unavoidable “little hierarchy problem” between the electroweak scale and the lightest NP states, which are expected to be at the TeV scale.

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REVIEW AND UPDATE OF THE COMPACTIFIED M/STRING THEORY PREDICTION OF THE HIGGS BOSON MASS AND PROPERTIES

International Journal of Modern Physics A ◽

10.1142/s0217751x13300020 ◽

2013 ◽

Vol 28 (01) ◽

pp. 1330002 ◽

Cited By ~ 3

Author(s):

GORDON KANE ◽

RAN LU ◽

BOB ZHENG

Keyword(s):

Higgs Mass ◽

Gauge Coupling ◽

Higgs Mechanism ◽

Boson Mass ◽

De Sitter ◽

Hierarchy Problem ◽

Gravitino Mass ◽

Little Hierarchy Problem ◽

De Sitter Vacuum ◽

M Theory

The August 2011 Higgs mass prediction was based on an ongoing six-year project studying M-theory compactified on a manifold of G2 holonomy, with significant contributions from Jing Shao, Eric Kuflik and others and particularly co-led by Bobby Acharya and Piyush Kumar. The M-theory results include stabilization of all moduli in a de Sitter vacuum, gauge coupling unification, derivation of TeV scale physics (solving the hierarchy problem), the derivation that generically scalar masses are equal to the gravitino mass which is larger than about 30 TeV, derivation of the Higgs mechanism via radiative electroweak symmetry breaking, absence of the flavor and CP problems, and the accommodation of string axions. The tan β and the μ parameter are part of the theory and are approximately calculated; as a result, the little hierarchy problem is greatly reduced. The heavy scalars imply that decoupling rare decays such as Bs →μ+ μ- should not deviate from their Standard Model values. This paper summarizes the results relevant to the Higgs mass prediction. A recent review [Int. J. Mod. Phys. A27, 1230012 (2012)] describes the program more broadly. Some of the results such as the scalar masses being equal to the gravitino mass and larger than about 30 TeV, derived early in the program, hold generically for compactified string theories as well as for compactified M-theory, while some other results may or may not. If the world is described by M-theory compactified on a G2 manifold and has a Higgs mechanism (so it could be our world) then Mh was predicted to be 126±2 GeV before the measurement. The derivation has some assumptions not related to the Higgs mass, but involves no free parameters.

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Pragmatic Approach to the Little Hierarchy Problem: The Case for Dark Matter and Neutrino Physics

Physical Review Letters ◽

10.1103/physrevlett.103.091802 ◽

2009 ◽

Vol 103 (9) ◽

Cited By ~ 40

Author(s):

Bohdan Grzadkowski ◽

José Wudka

Keyword(s):

Dark Matter ◽

Neutrino Physics ◽

Pragmatic Approach ◽

Hierarchy Problem ◽

Little Hierarchy Problem

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NONUNIVERSAL GAUGINO MASSES AND NATURAL SUPERSYMMETRY

International Journal of Modern Physics A ◽

10.1142/s0217751x13500462 ◽

2013 ◽

Vol 28 (13) ◽

pp. 1350046 ◽

Cited By ~ 49

Author(s):

ILIA GOGOLADZE ◽

FARIHA NASIR ◽

QAISAR SHAFI

Keyword(s):

Standard Model ◽

Quark Mass ◽

Higgs Mass ◽

Mass Range ◽

Fine Tuning ◽

Hierarchy Problem ◽

Light Stop ◽

High Scale ◽

Little Hierarchy Problem ◽

Gaugino Masses

We demonstrate that natural supersymmetry is readily realized in the framework of SU(4)c×SU(2)L×SU(2)Rwith nonuniversal gaugino masses. Focusing on ameliorating the little hierarchy problem, we explore the parameter space of this model which yields small fine-tuning measuring parameters (natural supersymmetry) at the electroweak scale (ΔEW) as well as at high scale (ΔHS). It is possible to have both ΔEWand ΔHSless than 100 in these models, (2% or better fine-tuning), while keeping the light CP-even (Standard Model-like) Higgs mass in the 123–127 GeV range. The light stop quark mass lies in the range [Formula: see text], and the range for the light stau lepton mass is [Formula: see text]. The first two family squarks are in the mass range [Formula: see text], and for the gluino we find [Formula: see text]. We do not find any solution with natural supersymmetry which yields significant enhancement for Higgs production and decay in the diphoton channel.

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