scholarly journals Stability of neutrino parameters and self-complementarity relation with varying SUSY breaking scale

2018 ◽  
Vol 97 (5) ◽  
Author(s):  
K. Sashikanta Singh ◽  
Subhankar Roy ◽  
N. Nimai Singh
Keyword(s):  
Susy Breaking ◽  
Breaking Scale

scholarly journals Winding uplifts and the challenges of weak and strong SUSY breaking in AdS

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Arthur Hebecker ◽  
Sascha Leonhardt
Keyword(s):  
Complex Structure ◽  
Susy Breaking ◽  
Technical Level ◽  
De Sitter ◽  
Large Complex ◽  
Breaking Scale ◽  
Large Complex Structure

Abstract We discuss the problem of metastable SUSY breaking in the landscape. While this is clearly crucial for the various de Sitter proposals, it is also interesting to consider the SUSY breaking challenge in the AdS context. For example, it could be that a stronger form of the non-SUSY AdS conjecture holds: it would forbid even metastable non-SUSY AdS in cases where the SUSY-breaking scale is parametrically above/below the AdS scale. At the technical level, the present paper proposes to break SUSY using the multi-cosine-shaped axion potentials which arise if a long winding trajectory of a ‘complex-structure axion’ appears in the large-complex-structure limit of a Calabi-Yau orientifold. This has been studied in the context of ‘Winding Inflation’, but the potential for SUSY breaking has not been fully explored. We discuss the application to uplifting LVS vacua, point out the challenges which one faces in the KKLT context, and consider the possibility of violating the non-SUSY AdS conjecture in the type-IIA setting of DGKT.

scholarly journals Testing Predictions of the Quantum Landscape Multiverse 3: The Hilltop Inflationary Potential

Symmetry ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 520
Author(s):  
Eleonora Di Valentino ◽  
Laura Mersini-Houghton
Keyword(s):  
Quantum Entanglement ◽  
Lower Limit ◽  
Hubble Parameter ◽  
Susy Breaking ◽  
Weak Lensing ◽  
Planck Data ◽  
The Universe ◽  
Breaking Scale ◽  
Inflationary Models ◽  
Origin Of The Universe

Here we test the predictions of the theory of the origin of the universe from the landscape multiverse, against the 2015 Planck data, for the case of the Hilltop class of inflationary models, for p = 4 and p = 6 . By considering the quantum entanglement correction of the multiverse, we can place just a lower limit on the local ’SUSY-breaking’ scale, respectively b > 8.7 × 10 6 G e V at 95 % c.l. and b > 1.3 × 10 8 G e V at 95 % c.l. from Planck TT+lowP, so the case with multiverse correction is statistically indistinguishable from the case with an unmodified inflation. We find that the series of anomalies predicted by the quantum landscape multiverse for the allowed range of b, is consistent with Planck’s tests of the anomalies. In addition, the friction between the two cosmological probes of the Hubble parameter and with the weak lensing experiments goes away for a particular subset, the p = 6 case of Hilltop models.

scholarly journals DARK ENERGY DENSITY IN MODELS WITH SPLIT SUPERSYMMETRY AND DEGENERATE VACUA

2012 ◽  
Vol 27 (11) ◽  
pp. 1250063 ◽  
Author(s):  
C. FROGGATT ◽  
R. NEVZOROV ◽  
H. B. NIELSEN
Keyword(s):  
Dark Energy ◽  
Energy Density ◽  
Cosmological Constant ◽  
Vacuum Energy ◽  
Susy Breaking ◽  
Vacuum Energy Density ◽  
Dark Energy Density ◽  
Hidden Sector ◽  
Split Supersymmetry ◽  
Breaking Scale

In N = 1 supergravity supersymmetric and nonsupersymmetric Minkowski vacua originating in the hidden sector can be degenerate. In the supersymmetric phase in flat Minkowski space, nonperturbative supersymmetry breakdown may take place in the observable sector, inducing a nonzero and positive vacuum energy density. Assuming that such a supersymmetric phase and the phase in which we live are degenerate, we estimate the value of the cosmological constant. We argue that the observed value of the dark energy density can be reproduced in the split SUSY scenario of SUSY breaking if the SUSY breaking scale is of order of 1010 GeV.

WHY IS TOP HEAVIER THAN BOTTOM? YUKAWA AND MASS UNIFICATION IN SUSY MODEL

1992 ◽  
Vol 07 (36) ◽  
pp. 3379-3390 ◽  
Author(s):  
MASAKO BANDO ◽  
TAICHIRO KUGO ◽  
NOBUHIRO MAEKAWA ◽  
HIROAKI NAKANO
Keyword(s):  
Lower Bound ◽  
Top Quark ◽  
Susy Breaking ◽  
Third Generation ◽  
Parameter Choice ◽  
Yukawa Couplings ◽  
The Third ◽  
Mass Pattern ◽  
Gauge Interaction ◽  
Breaking Scale

We examine whether the unification constraints on the Yukawa couplings and on the Higgs masses in the minimal supersymmetric Standard Model can be consistent with the observed mass pattern of the third generation fermions. The effects of the QCD interaction and the SU(2)R breaking owing to the U(1) Y gauge interaction and the absence of ντR are crucial. We observe that the parameter choice of “no-scale” supergravity is favored and the SUSY breaking scale has a lower bound, in order for the top quark to be much heavier than the bottom quark.

THE ONE-PARAMETER MODEL AT LHC

2011 ◽  
Vol 26 (02) ◽  
pp. 87-100
Author(s):  
JAMES MAXIN ◽  
VAN E. MAYES ◽  
D. V. NANOPOULOS
Keyword(s):  
Large Hadron Collider ◽  
Symmetry Breaking ◽  
Hadron Collider ◽  
Susy Breaking ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Brane Model ◽  
String Compactifications ◽  
The One ◽  
Breaking Scale

No-scale supergravity is a framework where it is possible to naturally explain radiative electroweak symmetry breaking and correlate it with the effective SUSY breaking scale. Many string compactifications have a classical no-scale structure, resulting in a one-parameter model (OPM) for the supersymmetry breaking soft terms, which results in a highly constrained subset of mSUGRA. We investigate the allowed supersymmetry parameter space for a generic one-parameter model taking into account the most recent experimental constraints. We also survey the possible signatures which may be observable at the Large Hadron Collider (LHC). Finally, we compare collider signatures of OPM to those from a model with non-universal soft terms, in particular those of an intersecting D6-brane model.

scholarly journals Gravitino problem in supergravity chaotic inflation and SUSY breaking scale after BICEP2

2014 ◽  
Vol 734 ◽  
pp. 358-363 ◽  
Author(s):  
Kazunori Nakayama ◽  
Fuminobu Takahashi ◽  
Tsutomu T. Yanagida
Keyword(s):  
Susy Breaking ◽  
Breaking Scale ◽  
Chaotic Inflation

scholarly journals Moduli stabilisation and the statistics of SUSY breaking in the landscape

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
Igor Broeckel ◽  
Michele Cicoli ◽  
Anshuman Maharana ◽  
Kajal Singh ◽  
Kuver Sinha
Keyword(s):  
Supersymmetry Breaking ◽  
Power Law ◽  
Complex Structure ◽  
Susy Breaking ◽  
Power Law Distribution ◽  
High Scale ◽  
The Past ◽  
Uniform Distributions ◽  
Logarithmic Distribution ◽  
Breaking Scale

Abstract The statistics of the supersymmetry breaking scale in the string landscape has been extensively studied in the past finding either a power-law behaviour induced by uniform distributions of F-terms or a logarithmic distribution motivated by dynamical supersymmetry breaking. These studies focused mainly on type IIB flux compactifications but did not systematically incorporate the Kähler moduli. In this paper we point out that the inclusion of the Kähler moduli is crucial to understand the distribution of the supersymmetry breaking scale in the landscape since in general one obtains unstable vacua when the F-terms of the dilaton and the complex structure moduli are larger than the F- terms of the Kähler moduli. After taking Kähler moduli stabilisation into account, we find that the distribution of the gravitino mass and the soft terms is power-law only in KKLT and perturbatively stabilised vacua which therefore favour high scale supersymmetry. On the other hand, LVS vacua feature a logarithmic distribution of soft terms and thus a preference for lower scales of supersymmetry breaking. Whether the landscape of type IIB flux vacua predicts a logarithmic or power-law distribution of the supersymmetry breaking scale thus depends on the relative preponderance of LVS and KKLT vacua.

scholarly journals Effects of the Variation of SUSY Breaking Scale on Yukawa and Gauge Couplings Unification

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Konsam Sashikanta Singh ◽  
N. Nimai Singh
Keyword(s):  
Gauge Coupling ◽  
Proton Decay ◽  
Susy Breaking ◽  
Threshold Effects ◽  
Third Generation ◽  
Heavy Particles ◽  
Yukawa Couplings ◽  
Decay Lifetime ◽  
Single Scale ◽  
Breaking Scale

The present analysis addresses an interesting primary question on how do the gauge and Yukawa couplings unification scales vary with varying SUSY breaking scalesms, assuming a single scale for all supersymmetric particles. It is observed that the gauge coupling unification scale increases withmswhereas third-generation Yukawa couplings unification scale decreases withms. The rising of the unification scale and also the mass of the color triplet multiplets is necessary to increase the proton decay lifetime; the analysis is carried out with two-loop RGEs for the gauge and Yukawa couplings within the minimal supersymmetric SU(5) model, while ignoring for simplicity the threshold effects of the heavy particles, which could be as large as a few percentages.

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