Electroweak Symmetry Breaking

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With a cutoff of, e.g., 1.5 TeV, the typical size of anomalous couplings is |α| ∼ v 2 Λ 2 ∼ 3 %. This is marginally consistent with data. ⇒ The Higgs-less scenario is not favored by data, but still possible. In a model without Higgs, there should not be large enhancement factors, rather some extra built-in suppression of anomalous coefficients.
The Standard Model Case Now, let us include a Higgs boson ⇒ the Standard Model. This allows us to ignore anomalous couplings. (Their natural size would be m 2 H /Λ2 .) With zero anomalous couplings, the SM fits data well for a Higgs of 115 GeV, at most some 200 GeV (the smaller, the better). In the SM, custodial-symmetry violating terms are naturally suppressed, sufficient for a good fit without them.
Page 1 and 2: Electroweak Symmetry Breaking Wolfg
Page 3 and 4: Effective Theory Building Blocks: Q
Page 5 and 6: Organizing principle: Dimensionalit
Page 7 and 8: Gauge invariance relates kinetic en
Page 9 and 10: Proposition: This model has a hidde
Page 11 and 12: We have obtained vector-current cou
Page 13 and 14: The Lagrangian of a gauge-invariant
Page 15 and 16: The symmetry is in the covariant de
Page 17 and 18: Intermediate Result: With the help
Page 19 and 20: Experimental Consequences I ◮ Exi
Page 21 and 22: We can, however, keep w a ≠ 0 and
Page 23 and 24: But first, let us complete the effe
Page 25 and 26: The physical significance of those
Page 27 and 28: Experimental Consequences II ◮ Un
Page 29 and 30: PART II Higgsology
Page 31 and 32: L 1 = α 1 gg ′ tr [ΣB µν Σ
Page 33 and 34: Custodial SU(2) symmetry This exper
Page 35 and 36: Theoretical Interpretation Any mode
Page 37 and 38: This allows for fluctuations of the
Page 39 and 40: Theoretical interpretation Models o
Page 41: Unitarity argument: Scattering ampl
Page 45 and 46: If the mass correction is to be of
Page 47 and 48: Multiple Higgses So far, we have pu
Page 49 and 50: Phenomenology: Two neutral Higgs bo
Page 51 and 52: Example for a nontrivial Higgs sect
Page 53 and 54: The LHC is well suited to study the
Page 55 and 56: Not Relying on the Higgs While anom
Page 57 and 58: Next, there are triple gauge coupli
Page 59 and 60: Here, sensitivity studies for the L
Page 61 and 62: To establish the Higgs as the carri
Page 63 and 64: The Higgs field has a potential tha
Page 65 and 66: Is the Higgs sector complete . . .
Page 67 and 68: Another cutoff possibility would be
Page 69 and 70: PART IV Gallery of Models
Page 71 and 72: Technicolor You should have realize
Page 73 and 74: Higgsless Extra dimensions The rise
Page 75 and 76: Topcolor There is a Higgs, but it i
Page 77 and 78: Elementary Higgs The previous model
Page 79 and 80: MSSM In supersymmetric models, the
Page 81 and 82: NMSSM In the NMSSM, the µ paramete
Page 83 and 84: How to make up a Little Higgs model
Page 85 and 86: In Little Higgs models, electroweak
Page 87: Final Summary ◮ Electroweak inter

Electroweak Symmetry Breaking

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