MEDIUM
Diploma
IMPORTANT
Earn 100

The muon decays according to μ-e-+νe+νμ. A Feynman diagram for this decay is shown below.

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Use the above diagram to construct a new Feynman diagram representing the scattering of electron anti-neutrino off a muon.

Important Questions on Atomic, Nuclear and Particle Physics

MEDIUM
Diploma
IMPORTANT
Discuss what is meant by the statement that the energy of atoms is discrete.
MEDIUM
Diploma
IMPORTANT
Discuss what is meant by the statement that the energy of atoms is discrete. Outline evidence for this discreteness.
HARD
Diploma
IMPORTANT
Explain why the dark lines of an absorption spectrum have the same wavelengths as the bright lines of an emission spectrum for the same element
MEDIUM
Diploma
IMPORTANT
State the electric charge of the nucleus He23
MEDIUM
Diploma
IMPORTANT
Write down the quark structure of the antineutron and the anti-proton. Verify that the charges come out correctly.
HARD
Diploma
IMPORTANT
Write down the quark structure of the antiparticle of the meson K+ = (us¯).
MEDIUM
Diploma
IMPORTANT
State the baryon number of the hadron with quark content c¯,c¯,c¯
MEDIUM
Diploma
IMPORTANT

Determine whether the following reaction conserve or violate baryon number.

p+e++γ