Dark Matter From 2-Flavour Strongly Coupled Gauge Theory
(2024) FYSM34 20241Department of Physics
Particle and nuclear physics
- Abstract
- Potential Dark Matter from strongly coupled gauge theory has been studied extensively in the past. However, in studies thus far, the combination of the phenomenological glueball state with the Linear sigma Model has yet to be explored. We provide the basis for a theory containing both the glueball and the sigma meson coupled to the Polyakov loop. Through considering only the lightest meson states and assuming classical field evolution we explore the cosmological evolution of the glueball and sigma fields. Our findings suggest that in such a theory the sigma meson is always heavier than the glueball, but the characteristics of the cosmological evolution of the fields is independent of the mass difference, which is rather dependent on the... (More)
- Potential Dark Matter from strongly coupled gauge theory has been studied extensively in the past. However, in studies thus far, the combination of the phenomenological glueball state with the Linear sigma Model has yet to be explored. We provide the basis for a theory containing both the glueball and the sigma meson coupled to the Polyakov loop. Through considering only the lightest meson states and assuming classical field evolution we explore the cosmological evolution of the glueball and sigma fields. Our findings suggest that in such a theory the sigma meson is always heavier than the glueball, but the characteristics of the cosmological evolution of the fields is independent of the mass difference, which is rather dependent on the parameter choice. (Less)
- Popular Abstract
- Since the first experimental suggestions of presence of matter invisible to the human eye back in the 1930s, dark matter has been a captivating question both in the science community and in popular media. In the 1970s, through investigating the rotation of stars around the centre of the galaxy, we gained confirmation of the presence of dark matter in not only other galaxies, but also our very own Milky Way galaxy, and set the stage for investigating its distribution withing a galactic plane. Further, current theoretical and experimental developments suggest that there is five times as much dark matter as there is visible matter in the Universe, all of which possibly only interacts with visible matter through the gravitational force. The... (More)
- Since the first experimental suggestions of presence of matter invisible to the human eye back in the 1930s, dark matter has been a captivating question both in the science community and in popular media. In the 1970s, through investigating the rotation of stars around the centre of the galaxy, we gained confirmation of the presence of dark matter in not only other galaxies, but also our very own Milky Way galaxy, and set the stage for investigating its distribution withing a galactic plane. Further, current theoretical and experimental developments suggest that there is five times as much dark matter as there is visible matter in the Universe, all of which possibly only interacts with visible matter through the gravitational force. The presence of dark matter is crucial for the evolution of the Universe, as it played an important role in early galaxy formation, and in the present epoch is responsible not only for the rotational trajectories of stars, but also for formation of galactic clusters.
While our understanding of dark matter and its importance in the contexts of the evolving Universe has grown drastically over the years, we still lack a clear-cut answer to questions, such as, what exactly it is on a fundamental level, what is its origin and why is there so much more dark matter than visible matter? In this work we set out to explore a potential candidate for light dark matter particles formed during the early evolution of the Universe. One of our candidates is the hypothetical glueball state, which is formed from the strong force mediators - gluons. The glueball forms during the confinement phase transition, which is the same phase transition where quarks come together to form composite states, we know as hadrons. The independent basis theory for our work has been well explored in previous research, and we seek to combine the well-established models into one combined model. We then investigate the cosmological evolution of our potential dark matter particles and the associated energy density of the condensate. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9161334
- author
- Fisers, Roberts LU
- supervisor
- organization
- course
- FYSM34 20241
- year
- 2024
- type
- H2 - Master's Degree (Two Years)
- subject
- language
- English
- id
- 9161334
- date added to LUP
- 2024-06-26 08:18:34
- date last changed
- 2024-06-26 08:18:34
@misc{9161334,
abstract = {{Potential Dark Matter from strongly coupled gauge theory has been studied extensively in the past. However, in studies thus far, the combination of the phenomenological glueball state with the Linear sigma Model has yet to be explored. We provide the basis for a theory containing both the glueball and the sigma meson coupled to the Polyakov loop. Through considering only the lightest meson states and assuming classical field evolution we explore the cosmological evolution of the glueball and sigma fields. Our findings suggest that in such a theory the sigma meson is always heavier than the glueball, but the characteristics of the cosmological evolution of the fields is independent of the mass difference, which is rather dependent on the parameter choice.}},
author = {{Fisers, Roberts}},
language = {{eng}},
note = {{Student Paper}},
title = {{Dark Matter From 2-Flavour Strongly Coupled Gauge Theory}},
year = {{2024}},
}