Question
The oscillation of these particles was first detected at the Super Kamiokande observatory. For 10 points each:
[10m] Name these leptons first detected in the Cowan-Reines experiment, more than 20 years after they were hypothesized to exist. The Homestake experiment detected solar examples of these particles.
ANSWER: neutrinos [accept electron neutrinos; accept muon neutrinos; accept tau neutrinos; accept solar neutrinos]
[10e] Neutrinos were first hypothesized by Wolfgang Pauli to explain charge energy conservation in this process. This type of radioactive decay is contrasted with alpha and gamma decay.
ANSWER: beta decay [accept beta minus decay; accept beta plus decay]
[10h] Observation of neutrinoless double beta decay would confirm that neutrinos are this kind of fermion, which are their own antiparticles. These fermions are contrasted with Dirac fermions and named after an Italian physicist.
ANSWER: Majorana fermions
<Physics>
Summary
| 2024 ACF Fall at Cornell | fall | Y | 10 | 14.00 | 100% | 30% | 10% |
| 2024 ACF Fall at Ohio State | fall | Y | 8 | 18.75 | 100% | 88% | 0% |
| 2024 ACF Fall at Washington | fall | Y | 1 | 20.00 | 100% | 100% | 0% |
| 2024 ACF Fall at Georgia | fall | Y | 12 | 16.67 | 100% | 58% | 8% |
| 2024 ACF Fall at North Carolina | fall | Y | 9 | 17.78 | 100% | 78% | 0% |
| 2024 ACF Fall at Claremont Colleges | fall | Y | 5 | 20.00 | 100% | 80% | 20% |
| 2024 ACF Fall at Rutgers | fall | Y | 8 | 18.75 | 100% | 75% | 13% |
| 2024 ACF Fall at Illinois | fall | Y | 9 | 20.00 | 100% | 67% | 33% |
Data
| Chicago A | WashU A | 10 | 10 | 10 | 30 |
| Chicago B | Notre Dame C | 10 | 10 | 0 | 20 |
| Notre Dame B | Illinois D | 0 | 10 | 0 | 10 |
| Indiana | WashU B | 0 | 10 | 0 | 10 |
| Purdue A | Iowa A | 10 | 10 | 0 | 20 |
| Illinois C | Northwestern B | 0 | 10 | 0 | 10 |
| Notre Dame A | Northwestern A | 10 | 10 | 0 | 20 |
| Purdue B | Iowa B | 10 | 10 | 10 | 30 |
| Purdue C | SIUE | 10 | 10 | 10 | 30 |