scholarly journals Electron and muon magnetic moments and implications for dark matter and model characterisation in non-universal U(1)′ supersymmetric models

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Mariana Frank ◽  
Yaşar Hiçyılmaz ◽  
Subhadeep Mondal ◽  
Özer Özdal ◽  
Cem Salih Ün
Keyword(s):  
Dark Matter ◽  
Magnetic Moments ◽  
Supersymmetric Model ◽  
Extended Model ◽  
Supersymmetric Models ◽  
Theoretical Predictions

Abstract We attribute deviations of the muon and electron magnetic moments from the theoretical predictions to the presence of an additional U(1)′ supersymmetric model. We interpret the discrepancies between the muon and electron anomalous magnetic moments to be due to the presence of non-universal U(1)′ charges. In a minimally extended model, we show that requiring both deviations to be satisfied imposes constraints on the spectrum of the model, in particular on dark matter candidates and slepton masses and ordering. Choosing three benchmarks with distinct dark matter features, we study implications of the model at colliders, concentrating on variables that can distinguish our non-universal scenario from other U(1)′ implementations.

scholarly journals Study of Rare Mesonic Decays Involving Di-Neutrinos in Their Final State

2018 ◽  
Vol 2018 ◽  
pp. 1-20
Author(s):  
Azeem Mir ◽  
Farida Tahir ◽  
Shakeel Mahmood ◽  
Shi- Hai Dong
Keyword(s):  
Branching Fractions ◽  
New Physics ◽  
Supersymmetric Model ◽  
Final State ◽  
Yukawa Couplings ◽  
Leptonic Decays ◽  
Pseudoscalar Mesons ◽  
Theoretical Predictions ◽  
Minimal Supersymmetric Model

We have studied phenomenological implication of R-parity violating (Rp) Minimal Supersymmetric Model (MSSM) via analyses of pure leptonic (M→νν¯) and semileptonic decays of pseudoscalar mesons (M→Xνν¯). These analyses involve comparison between theoretical predictions made by Rp MSSM and the Standard Model (SM) with the experimental results like branching fractions (Br) of the said process. We have found, in general, that Rp contribution dominates over the SM contribution, i.e., by a factor of 10 for the pure leptonic decays of KL,S and by 102 and 104 in case of Bs and Bd, respectively. Furthermore, the limits obtained on Rp Yukawa couplings (λαkβ′λαkγ′⁎) by using Br  (M→Xνν¯) are used to calculate Br  (M→νν¯). This demonstrates the role of Rp MSSM as a viable model for the study of new physics contribution in rare decays at places like Super B factories, KOTO (J-PARC) and NA62 at CERN.

scholarly journals Neutralino dark matter in the left-right supersymmetric model

2006 ◽  
Vol 73 (11) ◽  
Author(s):  
Durmuş A. Demir ◽  
Mariana Frank ◽  
Ismail Turan
Keyword(s):  
Dark Matter ◽  
Supersymmetric Model

scholarly journals The assembly of the Virgo cluster, traced by its galaxy haloes

2019 ◽  
Vol 488 (1) ◽  
pp. 1111-1126 ◽  
Author(s):  
James E Taylor ◽  
Jihye Shin ◽  
Nathalie N-Q Ouellette ◽  
Stéphane Courteau
Keyword(s):  
Dark Matter ◽  
Cluster Formation ◽  
Virgo Cluster ◽  
Scaling Relations ◽  
Density Profiles ◽  
Large Samples ◽  
Dark Matter Mass ◽  
Theoretical Predictions ◽  
History Of ◽  
Kinematic Studies

ABSTRACT Kinematic studies have produced accurate measurements of the total dark matter mass and mean dark matter density within the optical extent of galaxies for large samples of objects. Here we consider theoretical predictions for the latter quantity, $\bar{\rho }_{\rm dm}$, measured within the isophotal radius R23.5, for isolated haloes with universal density profiles. Through a combination of empirical scaling relations, we show that $\bar{\rho }_{\rm dm}$ is expected to depend weakly on halo mass and strongly on redshift. When galaxy haloes fall into larger groups or clusters, they become tidally stripped, reducing their total dark matter mass, but this process is expected to preserve central density until an object is close to disruption. We confirm this with collisonless simulations of cluster formation, finding that subhaloes have values of $\bar{\rho }_{\rm dm}$ close to the analytic predictions. This suggests that $\bar{\rho }_{\rm dm}$ may be a useful indicator of infall redshift on to the cluster. We test this hypothesis with data from the SHIVir survey, which covers a reasonable fraction of the Virgo cluster. We find that galaxies with high $\bar{\rho }_{\rm dm}$ do indeed trace the densest regions of the cluster, with a few notable exceptions. Samples selected by environment have higher densities at a significance of 3.5–4σ, while samples selected by density are more clustered at 3–3.5σ significance. We conclude that halo density can be a powerful tracer of the assembly history of clusters and their member galaxies.

FLAVOR VIOLATION FROM Z PENGUINS IN THE LEFT–RIGHT SUPERSYMMETRIC MODEL

2004 ◽  
Vol 19 (03) ◽  
pp. 189-196
Author(s):  
MARIANA FRANK
Keyword(s):  
Second Order ◽  
Supersymmetric Model ◽  
Order Effects ◽  
Sensitive Test ◽  
Kaon Decays ◽  
Gauge Sector ◽  
Flavor Violation ◽  
Flavor Changing ◽  
Mass Insertion ◽  
Supersymmetric Models

We analyze the effects of flavor-changing ZL penguin diagrams on rare kaon decays in a left–right supersymmetric model (LRSUSY). Using the mass-insertion approximation and including up to second-order effects, we show that the constraints obtained on up-sector flavor violating parameters can be stronger than previous bounds. These effects present a sensitive test of an extended gauge sector in supersymmetry and can be used to distinguish LRSUSY from other supersymmetric models.

scholarly journals Deformed shell model study of event rates for WIMP-73Ge scattering

2017 ◽  
Vol 32 (38) ◽  
pp. 1750210 ◽  
Author(s):  
R. Sahu ◽  
V. K. B. Kota
Keyword(s):  
Dark Matter ◽  
Inelastic Scattering ◽  
Shell Model ◽  
Energy Levels ◽  
Supersymmetric Model ◽  
Dark Matter Candidate ◽  
Detection Rates ◽  
Hartree Fock ◽  
Model Study ◽  
Event Rates

The event detection rates for the Weakly Interacting Massive Particles (WIMP) (a dark matter candidate) are calculated with [Formula: see text]Ge as the detector. The calculations are performed within the deformed shell model (DSM) based on Hartree–Fock states. First, the energy levels and magnetic moment for the ground state and two low-lying positive parity states for this nucleus are calculated and compared with experiment. The agreement is quite satisfactory. Then the nuclear wave functions are used to investigate the elastic and inelastic scattering of WIMP from [Formula: see text]Ge; inelastic scattering, especially for the [Formula: see text] transition, is studied for the first time. The nuclear structure factors which are independent of supersymmetric model are also calculated as a function of WIMP mass. The event rates are calculated for a given set of nucleonic current parameters. The calculation shows that [Formula: see text]Ge is a good detector for detecting dark matter.

scholarly journals Higgs-mass predictions in the MSSM and beyond

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
P. Slavich ◽  
S. Heinemeyer ◽  
E. Bagnaschi ◽  
H. Bahl ◽  
M. Goodsell ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Distinctive Feature ◽  
Higgs Mass ◽  
Precise Measurement ◽  
Current Status ◽  
Comprehensive Overview ◽  
The Standard Model ◽  
Supersymmetric Models ◽  
Theoretical Predictions ◽  
The Many

AbstractPredictions for the Higgs masses are a distinctive feature of supersymmetric extensions of the Standard Model, where they play a crucial role in constraining the parameter space. The discovery of a Higgs boson and the remarkably precise measurement of its mass at the LHC have spurred new efforts aimed at improving the accuracy of the theoretical predictions for the Higgs masses in supersymmetric models. The “Precision SUSY Higgs Mass Calculation Initiative” (KUTS) was launched in 2014 to provide a forum for discussions between the different groups involved in these efforts. This report aims to present a comprehensive overview of the current status of Higgs-mass calculations in supersymmetric models, to document the many advances that were achieved in recent years and were discussed during the KUTS meetings, and to outline the prospects for future improvements in these calculations.

Sign in / Sign up

Export Citation Format

Share Document