Related Experiment Video
Updated: Mar 2, 2026

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach
Published on: July 3, 2020
Likelihood analysis of the minimal AMSB model.
E Bagnaschi1, M Borsato2, K Sakurai3,4
1DESY, Notkestraße 85, 22607 Hamburg, Germany.
The minimal anomaly-mediated supersymmetry-breaking model suggests wino-like or Higgsino-like neutralinos as cold dark matter (DM) candidates. Constraints from cosmology and experiments limit parameters, with poor prospects for muon anomaly or LHC discoveries but potential for direct DM detection.
Area of Science:
- Particle Physics
- Cosmology
- Astrophysics
Background:
- Supersymmetry- মানি-mediated breaking (mAMSB) is a theoretical framework for physics beyond the Standard Model.
- The nature of cold dark matter (DM) remains one of the most significant unsolved problems in cosmology.
- Neutralinos are leading candidates for DM within supersymmetric theories.
Purpose of the Study:
- To perform a likelihood analysis of the mAMSB model.
- To investigate the viability of neutralino lightest supersymmetric particles (LSPs) as cold dark matter (DM) candidates.
- To constrain model parameters using cosmological and experimental data.
Main Methods:
- Likelihood analysis incorporating cosmological constraints (e.g., Planck) and accelerator experiment data.
- Inclusion of Sommerfeld enhancement for DM annihilation cross-sections.
- Analysis of Higgs mass measurements and constraints on supersymmetric particle masses.
Main Results:
- Both wino-like and Higgsino-like neutralino LSPs are viable DM candidates with similar likelihoods.
- Cosmological DM density limits constrain the mass of the neutralino LSP.
- Higgs mass measurements favor specific parameter ranges, while scalar masses remain poorly constrained.
- The anomalous magnetic moment of the muon and flavor measurements provide weak constraints on the mAMSB model.
- Prospects for discovering supersymmetric particles at the LHC are limited, but direct DM detection has potential.
Conclusions:
- The mAMSB model with neutralino LSPs is consistent with current cosmological and experimental data.
- Specific parameter regions are favored, but uncertainties remain, particularly for scalar masses.
- While direct LHC searches may have limited success, future direct DM detection experiments could probe the wino-like LSP scenario.
- Interference effects could improve agreement with anomalous magnetic moment data in specific scenarios.
Related Concept Videos
Mechanistic Models: Compartment Models in Individual and Population Analysis
One-Compartment Open Model: Wagner-Nelson and Loo Riegelman Method for ka Estimation
On...
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
Sign Test for Matched Pairs
To conduct the sign test, we first calculate the differences in...
Noncompartmental Analysis: Statistical Moment Theory
Mass Spectrometry of Amines

