Question

The failure of theories of this force based on the spontaneous symmetry breaking of SU(2) (“S-U-two”) motivated the development of the Glashow–Weinberg–Salam (“sah-LAHM”) model. For 10 points each:
[10e] What force that is unified with the electromagnetic force at high energies is mediated by the W and Z bosons?
ANSWER: weak force [or weak nuclear force; weak interaction; accept electroweak interaction]
[10h] These electroweak interactions are responsible for the decay of a strange B meson into a muon (“MEW-on”) pair. The suppression of these interactions means the decay of a neutral kaon (“KAY-on”) into a muon pair is much rarer than the decay of a neutral kaon into a muon and neutrino.
ANSWER: flavor-changing neutral currents [or FCNCs; prompt on neutral currents; prompt on descriptions of the exchange of a Z0 boson; prompt on descriptions of interactions mediated by a Z0 boson]
[10m] The group “SU(2) (“S-U-two”) cross this group, as generated by weak hypercharge,” is the symmetry group of the electroweak interaction. This group is the symmetry group of quantum electrodynamics.
ANSWER: U(1) (“U-one”) [accept U(1) sub Y]

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Data

TeamOpponentPart 1Part 2Part 3Total
Brown AFlorida A1001020
Chicago AChicago B1001020
Claremont AIllinois A100010
Cornell AOhio State A10101030
Cornell BIndiana A1001020
Georgia Tech BSouth Carolina A100010
MIT ANorthwestern A100010
Maryland AWUSTL A100010
Minnesota BColumbia B100010
NYU AMichigan A100010
North Carolina AHarvard A1001020
Penn AYale B100010
Penn State AMcGill A1001020
Purdue AHouston A100010
Rutgers BFlorida B100010
Stanford AGeorgia Tech A1001020
Texas AChicago C10101030
Toronto AMinnesota A1001020
UC Berkeley AColumbia A1001020
UC Berkeley BImperial A10101030
Vanderbilt AJohns Hopkins A100010
Virginia ARutgers A100010
WUSTL BIowa State A1001020
Yale ADuke A1001020