Forgotten Particle Could Explain Why We Exist, Say Physicists

Physicists are revisiting a long-overlooked particle that could shed light on one of the biggest mysteries in science: why the universe is filled with matter rather than nothing at all. The particle, known as the axion, was originally proposed in the 1970s to solve a problem in particle physics but has since faded from the spotlight. Now, researchers suggest that axions may have played a crucial role in the early universe, tipping the balance between matter and antimatter. If confirmed, this could explain why we are here at all. The idea hinges on the axion's ability to interact with other particles in a way that violates CP symmetry, a key ingredient for creating more matter than antimatter. While the axion remains hypothetical, upcoming experiments like the International Axion Observatory could provide the first direct evidence. If detected, it would not only solve the mystery of our existence but also open a new window into dark matter, as axions are a leading candidate. The stakes are high, and the race is on to find this elusive particle.