16.00 o10 h silverwood
DESCRIPTION
Research 7: H SilverwoodTRANSCRIPT
![Page 1: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/1.jpg)
Supersymmetric Dark Matter in IceCube
Image Source: NASA/ESA
Hamish SilverwoodDepartment of Physics and Astronomy
University of Canterbury
MSc Supervisors: Jenni Adams and Anthony Brown
![Page 2: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/2.jpg)
Rotational Velocity
Radial Distance
Dark MatterImage Source: Wikimedia and NASA/ESA
![Page 3: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/3.jpg)
Dark MatterImage Source: Wikimedia and NASA/ESA
Candidates must be1. Stable2. Electrically Neutral3. Uncoloured
![Page 4: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/4.jpg)
Supersymmetry
Particles
Light
R-ParityPR = 1
Sparticles
Heavy
R-ParityPR = -1
R-Parity Conservation is necessary for Proton Stability.
![Page 5: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/5.jpg)
Lightest
Supersymmetric
Particle
![Page 6: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/6.jpg)
LSP
![Page 7: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/7.jpg)
LSP P
R = -1 P
R = 1x1 =1
LSP Particles
![Page 8: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/8.jpg)
LSP P
R = -1 P
R = 1x1 =1
LSP Particles
![Page 9: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/9.jpg)
LSP
~χ0Neutralino1. Stable2. Electrically Neutral3. Uncoloured4. Interacts via
Weak Force & Gravity
![Page 10: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/10.jpg)
Dark MatterImage Source: NASA/ESA
Neutralinos are Dark Matter Candidates
![Page 11: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/11.jpg)
Neutralino Accumulation
![Page 12: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/12.jpg)
PR =(-1)x(-1)
= 1
PR = 1x1
=1
LSP Particles
![Page 13: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/13.jpg)
PR =(-1)x(-1)
= 1
PR = 1x1
=1
LSP Particles
νNeutrinos
▪
▪
▪
![Page 14: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/14.jpg)
ICECUBENEUTRINOOBSERVATORY
![Page 15: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/15.jpg)
Detector Optical Module
![Page 16: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/16.jpg)
![Page 17: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/17.jpg)
![Page 18: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/18.jpg)
![Page 19: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/19.jpg)
![Page 20: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/20.jpg)
Minimally
Supersymmetric
Standard
Model
![Page 21: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/21.jpg)
MSSM
MSSM: 120 Free Parameters
MSSM-25: 25 Free Parameters
![Page 22: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/22.jpg)
Scanning the MSSM-25 Parameter Space
DarkSUSY
●LSP Type●LSP Mass●Relic Density●Capture Rate●Annihilation
Rate
●IceCube events,rates, and likelihoods
▪▪▪Modifed by HS
to run with 25 Parameters
![Page 23: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/23.jpg)
Scanning the MSSM-25 Parameter Space
DarkSUSY
●LSP Type●LSP Mass●Relic Density●Capture Rate●Annihilation
Rate
●IceCube events,rates, and likelihoods
▪▪▪
Fitness Criteria is Relic Density;optimizing towards WMAP measurement.
Modifed by HS to run with 25
Parameters
![Page 24: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/24.jpg)
Scanning the MSSM-25 Parameter Space
![Page 25: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/25.jpg)
Scanning the MSSM-25 Parameter Space
![Page 26: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/26.jpg)
Scanning the MSSM-25 Parameter Space
![Page 27: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/27.jpg)
Scanning the MSSM-25 Parameter Space
![Page 28: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/28.jpg)
Final Goal of Parameter Scans
IceCube Event Simulations
![Page 29: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/29.jpg)
Final Goal of Parameter Scans
IceCube Event Simulations
![Page 30: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/30.jpg)
The Gritty Details
●Monte Carlo methods used to scan parameter space.
●Currently running scans based on the VEGAS algorithm.
![Page 31: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/31.jpg)
Conclusion●SUSY supplies us with a Dark Matter candidate particle: the neutralino.
●IceCube can potentially detect the annihilation of these neutralinos in the Sun.
●Scans of the MSSM-25 parameter space will help us interpret results from IceCube.
![Page 32: 16.00 o10 h silverwood](https://reader031.vdocuments.site/reader031/viewer/2022020306/5550b779b4c905fa618b4bc8/html5/thumbnails/32.jpg)
Questions