Mark Srednicki
Quantum Field Theory: Problem Solutions
89
149
The Standard Model: Quark Sector
89.1) To get an allowed mass term, we must have an SU(3) singlet, which requires combining a 3
and a 3. However, the only 3 is also a 2 of SU(2), and both 3s ar
Mark Srednicki
87
141
Quantum Field Theory: Problem Solutions
The Standard Model: Gauge and Higgs Sector
87.1) See eq. (88.15) and eq. (88.16).
87.2) a) e = (4/127.9)1/2 = 0.313, g2 = e/sW = 0.652, g1 = e/cW = 0.357, v = 2MW /g2 =
247 GeV.
2
b) GF = / 2 s
Mark Srednicki
Quantum Field Theory: Problem Solutions
29
56
Effective Field Theory
29.1) a) Let a dot denote d/d ln , so that g = b1 g2 + b2 g3 + . . . . Inverting g = g + c2 g2 + . . . , we
2 + . . . We now have
have g = g c2 g
g = g 2c2 g g + . . .
= (