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Chapter 33: Q27CQ (page 1211)
Discuss the similarities and differences between the photon and the Z0in terms of particle properties, including forces felt.
The similarities and differences between photons and Z0 are mentioned below.
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The intensity of cosmic ray radiation decreases rapidly with increasing energy, but there are occasionally extremely energetic cosmic rays that create a shower of radiation from all the particles they create by striking a nucleus in the atmosphere as seen in the figure given below. Suppose a cosmic ray particle having an energy of \({\rm{1}}{{\rm{0}}^{{\rm{10}}}}{\rm{ GeV}}\)converts its energy into particles with masses averaging 200 MeV/c2
(a) How many particles are created?
(b) If the particles rain down on an \({\rm{1}}{\rm{.00 - k}}{{\rm{m}}^{\rm{2}}}\) area, how many particles are there per square meter?
If the Higgs boson is discovered and found to have mass, will it be considered the ultimate carrier of the weak force? Explain your response.
Because of energy loss due to synchrotron radiation in the LHC at CERN, only 5.00 MeV is added to the energy of each proton during each revolution around the main ring. How many revolutions are needed to produce 7.00 TeV (7000 GeV) protons, if they are injected with an initial energy of 8.00 GeV?
How can the lifetime of a particle indicate that its decay is caused by the strong nuclear force? How can a change in strangeness imply which force is responsible for a reaction? What does a change in quark flavor imply about the force that is responsible?
The decay mode of the positive tau is\({{\bf{\tau }}^ + } \to {\rm{ }}{{\bf{\mu }}^ + }{\rm{ }} + {\rm{ }}{{\bf{\nu }}_{\bf{\mu }}}{\rm{ }} + {\rm{ }}{{\bf{\bar \nu }}_{\bf{\tau }}}\).
(a) What energy is released?
(b) Verify that charge and lepton family numbers are conserved.
(c) The \({\tau ^ + }\)is the antiparticle of the \({\tau ^ - }\). Verify that all the decay products of the \({\tau ^ + }\)are the antiparticles of those in the decay of the \({\tau ^ - }\) given in the text.
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