Baryogenesis is a research area in theoretical and particle cosmology that investigates mechanisms by which a matter–antimatter asymmetry could arise in the early universe from an initially baryon-symmetric state. It focuses on constructing and analyzing models that satisfy Sakharov conditions—baryon number violation, C and CP violation, and departure from thermal equilibrium—within or beyond the Standard Model, such as electroweak baryogenesis, leptogenesis, or grand unified theory scenarios. Research addresses quantitative predictions for the baryon-to-photon ratio, connects to precision measurements of CP violation, neutrino properties, and collider constraints, and uses cosmological observations, including big bang nucleosynthesis and the cosmic microwave background, to test and constrain proposed mechanisms.
The first-known observations of matter–antimatter asymmetry in a decaying composite subatomic particle that belongs to the baryon class are reported from the LHCb experiment located at the Large Hadron Collider at CERN. This ...
General Physics
Jul 16, 2025
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On March 24, at the annual Rencontres de Moriond conference taking place in La Thuile, Italy, the LHCb collaboration at CERN reported a new milestone in our understanding of the subtle yet profound differences between matter ...
General Physics
Mar 26, 2025
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Strange "right-handed" neutrinos may be responsible for all the matter in the universe, according to new research.
Astronomy
Jan 16, 2025
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In the Big Bang, matter and antimatter should have been created in equal amounts. But fast forward 13.8 billion years to the present day, and the universe is made almost entirely of matter, so something must have happened ...
General Physics
Dec 16, 2024
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Why does the universe contain matter and (virtually) no antimatter? The BASE international research collaboration at the European Organization for Nuclear Research (CERN) in Geneva, headed by Professor Dr. Stefan Ulmer from ...
Quantum Physics
Aug 2, 2024
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97
The early universe was 250,000 times hotter than the core of our sun. That's far too hot to form the protons and neutrons that make up everyday matter. Scientists recreate the conditions of the early universe in particle ...
General Physics
Jul 29, 2024
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