- Neutrinos are fundamental, lightweight particles: Electrically neutral, produced in processes like radioactive decay and nuclear reactions (e.g., in the sun). Their mass is unknown but tiny, less than a millionth of an electron’s mass.
- KATRIN’s Goal: The Karlsruhe d="M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/>
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Tritium Neutrino experiment in Germany aims to precisely measure the mass of the electron antineutrino.
How KATRIN Works: Studies tritium decay, focusing on the emitted electron’s energy, which is affected by the neutrino’s mass. Measuring electron energies helps estimate the neutrino’s mass upper limit.
Latest KATRIN Finding: Reduced the upper limit of the neutrino mass to less than 0.45 electron volts (eV). This is a significant improvement (nearly 50% reduction) based on precise measurements of 36 million electrons from tritium decay.
Significance of Neutrino Mass Measurement: Crucial for understanding cosmology (dark matter/dark energy) and developing theories beyond the Standard Model of particle physics.
India’s Contribution: The proposed India-based Neutrino Observatory (INO) in Tamil Nadu will focus on studying atmospheric neutrinos.
