Suppressed supersymmetry breaking terms in the Higgs sector

We show that by combining the elementary Goldstone–Higgs scenario and supersymmetry it is possible to raise the scale of supersymmetry breaking to several TeVs by relating it to the spontaneous-symmetry-breaking one. This is achieved by first enhancing the global symmetries of the super-Higgs sector to SU(4) and then embedding the electroweak sector and the Standard Model (SM) fermions. We determine the conditions under which the model achieves a vacuum such that the resulting Higgs is a pseudo-Goldstone boson (pGB). The main results are: the supersymmetry-breaking scale is identified with the spontaneous-symmetry-breaking scale of SU(4) which is several TeVs above the radiatively induced electroweak scale; intriguingly the global symmetry of the Higgs sector predicts the existence of two super-Higgs multiplets with one mass eigenstate playing the role of the pseudo-Goldstone Higgs; the symmetry-breaking dynamics fixes [Formula: see text] and requires a supplementary singlet chiral superfield. We finally discuss the spectrum of the model that now features the superpartners of the SM fermions and gauge bosons in the multi-TeV range.

Download Full-text

Higgs sector in anomaly mediated supersymmetry breaking scenario

Nuclear Physics B ◽

10.1016/s0550-3213(99)00759-2 ◽

2000 ◽

Vol 573 (1-2) ◽

pp. 87-96 ◽

Cited By ~ 21

Author(s):

Shufang Su

Keyword(s):

Supersymmetry Breaking ◽

Higgs Sector

Download Full-text

Phenomenology of Low-Scale Supersymmetry Breaking Models

Modern Physics Letters A ◽

10.1142/s0217732303011897 ◽

2003 ◽

Vol 18 (32) ◽

pp. 2227-2241 ◽

Cited By ~ 2

Author(s):

Ignacio Navarro

Keyword(s):

Supersymmetry Breaking ◽

Higgs Sector ◽

Susy Breaking ◽

Lagrangian Description ◽

Higgs Potential ◽

Effective Lagrangian ◽

Supersymmetric Models

In this review we consider the distinctive phenomenology of supersymmetric models in which the scale of SUSY breaking is very low, [Formula: see text], focusing on the Higgs sector and the process of electroweak breaking. Using an effective Lagrangian description of the interactions between the observable fields and the SUSY breaking sector, it is shown how the conventional MSSM picture can be substantially modified. For instance, the Higgs potential has non-negligible SUSY breaking quartic couplings that can modify completely the pattern of electroweak breaking and the Higgs spectrum with respect to that of the conventional MSSM-like models.

Download Full-text

Low-energy supersymmetry breaking from string flux compactifications: Benchmark scenarios

Journal of High Energy Physics ◽

10.1088/1126-6708/2006/04/040 ◽

2006 ◽

Vol 2006 (04) ◽

pp. 040-040 ◽

Cited By ~ 20

Author(s):

Benjamin C Allanach ◽

Fernando Quevedo ◽

Kerim Suruliz

Keyword(s):

Flux Compactifications ◽

Supersymmetry Breaking ◽

Low Energy

Download Full-text

Explicit soft supersymmetry breaking in the heterotic M-theory B − L MSSM

Journal of High Energy Physics ◽

10.1007/jhep08(2021)033 ◽

2021 ◽

Vol 2021 (8) ◽

Author(s):

Anthony Ashmore ◽

Sebastian Dumitru ◽

Burt A. Ovrut

Keyword(s):

Line Bundle ◽

Supersymmetry Breaking ◽

Moduli Space ◽

Initial Conditions ◽

Low Energy ◽

Strongly Coupled ◽

Hidden Sector ◽

Effective Lagrangian ◽

Soft Supersymmetry Breaking ◽

M Theory

Abstract The strongly coupled heterotic M-theory vacuum for both the observable and hidden sectors of the B − L MSSM theory is reviewed, including a discussion of the “bundle” constraints that both the observable sector SU(4) vector bundle and the hidden sector bundle induced from a single line bundle must satisfy. Gaugino condensation is then introduced within this context, and the hidden sector bundles that exhibit gaugino condensation are presented. The condensation scale is computed, singling out one line bundle whose associated condensation scale is low enough to be compatible with the energy scales available at the LHC. The corresponding region of Kähler moduli space where all bundle constraints are satisfied is presented. The generic form of the moduli dependent F-terms due to a gaugino superpotential — which spontaneously break N = 1 supersymmetry in this sector — is presented and then given explicitly for the unique line bundle associated with the low condensation scale. The moduli-dependent coefficients for each of the gaugino and scalar field soft supersymmetry breaking terms are computed leading to a low-energy effective Lagrangian for the observable sector matter fields. We then show that at a large number of points in Kähler moduli space that satisfy all “bundle” constraints, these coefficients are initial conditions for the renormalization group equations which, at low energy, lead to completely realistic physics satisfying all phenomenological constraints. Finally, we show that a substantial number of these initial points also satisfy a final constraint arising from the quadratic Higgs-Higgs conjugate soft supersymmetry breaking term.

Download Full-text

Electroweak SU(2)L × U(1)Y model with strong spontaneously fermion-mass-generating gauge dynamics

Journal of High Energy Physics ◽

10.1007/jhep03(2021)224 ◽

2021 ◽

Vol 2021 (3) ◽

Author(s):

Petr Beneš ◽

Jiří Hošek ◽

Adam Smetana

Keyword(s):

Chiral Symmetry Breaking ◽

Axial Vector ◽

Higgs Sector ◽

Dyson Equation ◽

Mass Splitting ◽

Fermion Mass ◽

Goldstone Bosons ◽

The Standard Model ◽

Exploratory Stage ◽

The Masses

Abstract Higgs sector of the Standard model (SM) is replaced by quantum flavor dynamics (QFD), the gauged flavor SU(3)f symmetry with scale Λ. Anomaly freedom requires addition of three νR. The approximate QFD Schwinger-Dyson equation for the Euclidean infrared fermion self-energies Σf(p2) has the spontaneous-chiral-symmetry-breaking solutions ideal for seesaw: (1) Σf(p2) = $$ {M}_{fR}^2/p $$ M fR 2 / p where three Majorana masses MfR of νfR are of order Λ. (2) Σf(p2) = $$ {m}_f^2/p $$ m f 2 / p where three Dirac masses mf = m(0)1 + m(3)λ3 + m(8)λ8 of SM fermions are exponentially suppressed w.r.t. Λ, and degenerate for all SM fermions in f. (1) MfR break SU(3)f symmetry completely; m(3), m(8) superimpose the tiny breaking to U(1) × U(1). All flavor gluons thus acquire self-consistently the masses ∼ Λ. (2) All mf break the electroweak SU(2)L × U(1)Y to U(1)em. Symmetry partners of the composite Nambu-Goldstone bosons are the genuine Higgs particles: (1) three νR-composed Higgses χi with masses ∼ Λ. (2) Two new SM-fermion-composed Higgses h3, h8 with masses ∼ m(3), m(8), respectively. (3) The SM-like SM-fermion-composed Higgs h with mass ∼ m(0), the effective Fermi scale. Σf(p2)-dependent vertices in the electroweak Ward-Takahashi identities imply: the axial-vector ones give rise to the W and Z masses at Fermi scale. The polar-vector ones give rise to the fermion mass splitting in f. At the present exploratory stage the splitting comes out unrealistic.

Download Full-text

Precision Higgs couplings in neutral naturalness models: an effective field theory approach

Journal of High Energy Physics ◽

10.1007/jhep02(2021)234 ◽

2021 ◽

Vol 2021 (2) ◽

Author(s):

Lucien Heurtier ◽

Hao-Lin Li ◽

Huayang Song ◽

Shufang Su ◽

Wei Su ◽

...

Keyword(s):

Field Theory ◽

Effective Field Theory ◽

Goldstone Boson ◽

Higgs Sector ◽

New Physics ◽

Effective Field ◽

Precision Measurements ◽

Global Symmetry ◽

Theory Approach ◽

Decay Channels

AbstractThe Higgs sector in neutral naturalness models provides a portal to the hidden sectors, and thus measurements of Higgs couplings at current and future colliders play a central role in constraining the parameter space of the model. We investigate a class of neutral naturalness models, in which the Higgs boson is a pseudo-Goldstone boson from the universal SO(N)/SO(N −1) coset structure. Integrating out the radial mode from the spontaneous global symmetry breaking, we obtain various dimension-six operators in the Standard Model effective field theory, and calculate the low energy Higgs effective potential with radiative corrections included. We perform aχ2fit to the Higgs coupling precision measurements at current and future colliders and show that the new physics scale could be explored up to 2.3 (2.4) TeV without (with) the Higgs invisible decay channels at future Higgs factories. The limits are comparable to the indirect constraints obtained via electroweak precision measurements.

Download Full-text

Standard model from a supergravity model with a naturally small cosmological constant

Journal of High Energy Physics ◽

10.1007/jhep05(2021)181 ◽

2021 ◽

Vol 2021 (5) ◽

Author(s):

Shing Yan Li ◽

Yu-Cheng Qiu ◽

S.-H. Henry Tye

Keyword(s):

String Theory ◽

Standard Model ◽

Cosmological Constant ◽

Supersymmetry Breaking ◽

Supersymmetric Standard Model ◽

Degrees Of Freedom ◽

Interaction Terms ◽

Supersymmetric Version ◽

The Standard Model ◽

Linear Version

Abstract Guided by the naturalness criterion for an exponentially small cosmological constant, we present a string theory motivated 4-dimensional $$ \mathcal{N} $$ N = 1 non-linear supergravity model (or its linear version with a nilpotent superfield) with spontaneous supersymmetry breaking. The model encompasses the minimal supersymmetric standard model, the racetrack Kähler uplift, and the KKLT anti-D3-branes, and use the nilpotent superfield to project out the undesirable interaction terms as well as the unwanted degrees of freedom to end up with the standard model (not the supersymmetric version) of strong and electroweak interactions.

Download Full-text

String defects, supersymmetry and the Swampland

Journal of High Energy Physics ◽

10.1007/jhep11(2020)125 ◽

2020 ◽

Vol 2020 (11) ◽

Author(s):

Carlo Angelantonj ◽

Quentin Bonnefoy ◽

Cezar Condeescu ◽

Emilian Dudas

Keyword(s):

Supersymmetry Breaking ◽

Dimensional Theory ◽

Consistency Conditions ◽

Tensor Multiplet ◽

Microscopic Origin

Abstract Recently, Kim, Shiu and Vafa proposed general consistency conditions for six dimensional supergravity theories with minimal supersymmetry coming from couplings to strings. We test them in explicit perturbative orientifold models in order to unravel the microscopic origin of these constraints. Based on the perturbative data, we conjecture the existence of null charges Q∙Q = 0 for any six-dimensional theory with at least one tensor multiplet, coupling to string defects of charge Q. We then include the new constraint to exclude some six-dimensional supersymmetric anomaly-free examples that have currently no string or F-theory realization. We also investigate the constraints from the couplings to string defects in case where supersymmetry is broken in tachyon free vacua, containing non-BPS configurations of brane supersymmetry breaking type, where the breaking is localized on antibranes. In this case, some conditions have naturally to be changed or relaxed whenever the string defects experience supersymmetry breaking, whereas the constraints are still valid if they are geometrically separated from the supersymmetry breaking source.

Download Full-text