Packet C: Bonus 10
This particle has a spin of 2 because the stress–energy tensor is second order. For 10 points each:
[10e] Name this hypothetical gauge boson that mediates an attractive fundamental force.
ANSWER: gravitons
[10h] This scientist is the first namesake of a theorem that implies the graviton cannot be a composite particle because it is massless and has spin 2. This physicist also names the soft graviton theorem.
ANSWER: Steven Weinberg [accept Weinberg–Witten theorem; accept Weinberg soft graviton theorem]
[10m] As a consequence of the Weinberg–Witten theorem, a composite spin-2 graviton would violate a covariance condition named for this physicist. By the CPT theorem, any theory with CPT symmetry is invariant under this physicist’s transformations.
ANSWER: Hendrik Lorentz [accept Lorentz transformations; accept Lorentz invariance; accept Lorentz covariance]
<Waterloo A, Physics> | Packet C - Virginia Tech A, Waterloo A, UCSD A, UBC A
| Heard | PPB | E % | M % | H % |
|---|---|---|---|---|
| 72 | 15.83 | 86% | 67% | 6% |
Conversion
Summary
| Tournament | Edition | Match | Heard | PPB | E % | M % | H % |
|---|---|---|---|---|---|---|---|
| California (North) | Main Site | ✓ | 3 | 20.00 | 100% | 100% | 0% |
| Canada | Main Site | ✓ | 10 | 16.00 | 90% | 60% | 10% |
| Florida | Main Site | ✓ | 3 | 16.67 | 67% | 100% | 0% |
| Great Lakes | Main Site | ✓ | 5 | 16.00 | 100% | 60% | 0% |
| Midwest | Main Site | ✓ | 8 | 15.00 | 88% | 63% | 0% |
| Northeast | Main Site | ✓ | 6 | 20.00 | 100% | 67% | 33% |
| Overflow | Main Site | ✓ | 4 | 12.50 | 75% | 50% | 0% |
| South Central | Main Site | ✓ | 2 | 15.00 | 100% | 50% | 0% |
| Southeast | Main Site | ✓ | 7 | 14.29 | 86% | 57% | 0% |
| UK | Main Site | ✓ | 12 | 14.17 | 83% | 58% | 0% |
| Upper Mid-Atlantic | Main Site | ✓ | 8 | 17.50 | 88% | 75% | 13% |
| Upstate NY | Main Site | ✓ | 4 | 15.00 | 50% | 100% | 0% |