ASP Online Seminars: Phenomenological Aspects of Axion-Like Particles in Cosmology and Astrophysics
by
Abstract:
Cosmology and particle physics are closer today than ever before, with several searches underway at the interface between cosmology, particle physics, and field theory. The mystery of dark matter (DM) is one of the greatest common unsolved problems between these fields. It is established now based on many astrophysical and cosmological observations that only a small fraction of the total matter content of the universe is made of baryonic matter, while the vast majority is constituted by dark matter. However, the nature of such a component is still unknown. One theoretically well-motivated approach to understanding the nature of dark matter would be through looking for light pseudo-scalar candidates for dark matter such as axions and axion-like particles (ALPs). Axions are hypothetical elementary particles resulting from the Peccei-Quinn (PQ) solution to the strong CP problem in quantum chromodynamics (QCD). Furthermore, many theoretically well-motivated extensions to the standard model of particle physics (SMPP) predicted the existence of more pseudo-scalar particles similar to the QCD axion and called ALPs. Axions and ALPs are characterized by their coupling with two photons. While the coupling parameter for axions is related to the axion mass, there is no direct relation between the coupling parameter and the mass of ALPs. Nevertheless, it is expected that ALPs share the same phenomenology of axions. In the past years, axions and ALPs regained popularity and slowly became one of the most appealing candidates that possibly contribute to the dark matter density of the universe. In my talk, I will show that the phenomenology of axions and ALPs interactions with photons can be used to constrain some of their properties and explain several astrophysical phenomena.
IOC
Ahmed Ayad (ASP2018 Alumnus)
Abdesslam Arhrib
ADAM MOHAMMED
Ahmed Ayad
Ahmed Refaat
Ahmed Shaaban
Ann Njeri
Christogonus Sunday
Cristina Alexandru
Dereje Wakgari
ebode onyie fabien
Fatima Bendebba
Fatima Zahra LAHBABI
Fatma Shaban
Fernando Ferroni
Francisco Fenias Macucule
Hajar Imam
Heba Sami
Jamal Al Zain
Jaouad El Falaki
Jean Baptiste FANKAM FANKAM
Jebin Larosh
Jespere Calderone Nzobadila Ondze
Kayode Ayodeji DADA
Mbolahasina RALIJAONA
Meryem Noury
Mohamed Ali
Mohamed Belfakir
Mohamed Zaazoua
Mohammed Boukidi
Mounia Laassiri
Muhammad Ibrahim Abdulhamid
Nada Mahran
Niyonshuti Emmanuel
Rian Fritz Jalandoni
SAAD ELFARKH
Sakina Boudissa
Sanae Ezzarqtouni
Sandile Kumalo
Somiealo Azote
Soumaya Manai
Ulrich Goerlach
Yassine El Ghazali