GATE Nuclear and Particle Physics: photons, baryons, mesons and leptons – Previous Year Questions

2 GATE previous year questions on photons, baryons, mesons and leptons (Nuclear and Particle Physics, Physics) with answers and explanations, from every paper.

1. GATE 2023 PH Q48 (2 marks, Multiple choice) – In a hadronic interaction, π0’s are produced with different momenta, and they immediately decay into two photons with an opening angle θ between them.…
2. GATE 2025 PH Q25 (1 mark, Multiple select) – Which of the following option(s) is/are correct for photons?