The Cosmic Neutrino Background (CNB) is a fundamental component of the universe’s particle makeup, consisting of a vast sea of neutrinos that permeates space. Neutrinos are subatomic particles with extremely low mass and no electric charge, which makes them notoriously difficult to detect. They are a key element of the Standard Model of particle physics.
The CNB consists of relic neutrinos that were formed in the early moments of the universe, shortly after the Big Bang. These neutrinos are often referred to as “cosmic neutrinos” and are an important aspect of cosmology. They travel at nearly the speed of light and, because they interact only very weakly with other matter, they have largely escaped direct detection. However, their presence is inferred from their impact on the universe’s expansion and structure. The CNB plays a role in the universe’s overall energy density and is a crucial component of our understanding of the early universe and its evolution. Studying the CNB provides valuable insights into the universe’s history and structure.
