Electroweak Theory

Post on 26-May-2015

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In particle physics, the electroweak interaction is the unified description of two of the four known fundamental interactions of nature: electromagnetism and the weak interaction. Although these two forces appear very different at everyday low energies, the theory models them as two different aspects of the same force. Above the unification energy, on the order of 100 GeV, they would merge into a single electroweak force.

Transcript of Electroweak Theory

QUANTUM FIELD THEORYA Crash Course by Hasan Mohammad

Electroweak Interaction

1979 Nobel Prize Physics

What we’ll look at:-Review on Spinors-Massless Dirac Lagrangian-Leptonic Fields/Charges-Gauge Fields/unitary transformations-Weinberg Angle-Spontaneous Symmetry Breaking

Right and Left-Handed Spinors

Right and Left-Handed Spinors

Right and Left-Handed Spinors

Massless Dirac Lagrangian

Massless Dirac Lagrangian

Massless Dirac Lagrangian

Leptonic Fields

Leptonic Fields

Leptonic Fields

Leptonic Fields

Electroweak Charges

Unitary Transformations

Unitary Transformations

Unitary Transformations

Unitary Transformations

Unitary Transformations

Unitary Transformations

Unitary Transformations

Unitary Transformations

Higgs Symmetry Breaking

Higgs Symmetry Breaking

Higgs Symmetry Breaking

Higgs Symmetry Breaking

Higgs Symmetry Breaking

Higgs Symmetry Breaking

Gauge Masses

Gauge Masses

Gauge Masses

Gauge Masses

Gauge Masses

Gauge Masses

Weinberg Angle

Breaking the Symmetry

Looking for a Mass

Photon is massless!

Z-Particle Mass

Theoretical bounds…

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