Why Higgs - Www Atlas Lbl

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Textbook W and Z are massive vector bosons Only known consistent (renormalizable) quantum field theory of massive vectors is gauge theory with Higgs mechanism Therefore, W and Z bosons must be gauge bosons, broken by a Higgs S. Weinberg 6 ! " # " 0.2 0.15 0.1 0.05 0 -0.05 -0.1 -0.15 -0.2 1.2 1.15 1.1 1.05 1 0.95 0.9 0.85 0.8 0.9 1 1.1 -0.1 0 0.1 LEP charged TGC Combination 2002 g 1 Z ! " # " 1.25 1.2 1.15 1.1 1.05 1 0.95 0.9 0.85 0.8 0.75 0.9 0.95 1 1.05 1.1 DELPHI L3 OPAL Preliminary 95% c.l. 68% c.l. 2d fit result Now added evidence of vector boson self-couplings g 1 Z
Standard Model V=λ|H| 4 -μ 2 |H| 2 The minimum of the potential has 2 =μ/2λ The scalar Higgs boson has two kinds of interactions with Z, W Once Higgs is replaced by the expectation value, there is mass for Z, W! Z Z ! m Z 2 Z 7
Page 1 and 2: Why Higgs? Hitoshi Murayama (Berkel
Page 3 and 4: Why We Need Higgs
Page 5: “Dark Field” gravity electric f
Page 9 and 10: Like a superconductor In a supercon
Page 11 and 12: unitarity W-boson scattering grows
Page 13 and 14: Once upon a time, there was a hiera
Page 15 and 16: History repeats itself? Higgs boson
Page 17 and 18: Bad Tends to give excessive flavor-
Page 19 and 20: unitarity again The only way to res
Page 21 and 22: Toy model SU(2) in the bulk boundar
Page 23 and 24: More complicated boundary condition
Page 25 and 26: Further improvements Y. Nomura, hep
Page 27: Conclusions We need a Dark Field fi

Why Higgs - Www Atlas Lbl

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