Particles with a non-zero value for this property couple to the B boson. For 10 points each:
[10h] Name this quantity equal to Q minus T-sub-3. Unlike a similarly-named quantity, this quantity is negative one for left-handed leptons, but negative two for right-handed electrons and zero for sterile neutrinos.
ANSWER: weak hypercharge [reject “hypercharge”]
[10m] The weak hypercharge is the generator of this symmetry group, while weak isospin generates SU(2). This symmetry group is isomorphic to the unit circle; please give the notation for the group that is most common in the context of the Standard Model.
ANSWER: U(1) (“U-one”) [or the unitary group of degree 1; prompt on unitary group]
[10e] The weak hypercharge is zero for all of the standard gauge bosons, but positive one for this boson. This boson confirmed in 2012 mediates the symmetry-breaking that gives rise to the mass of the W and Z bosons.
ANSWER: Higgs boson
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