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Chapter 33: Particle Physics

College Physics (Urone)
Pages: 1187 - 1214

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75 Questions for Chapter 33: Particle Physics

  1. The \[{{\rm{\pi }}^{\rm{0}}}\]is its own antiparticle and decays in the following manner: \[{\pi ^0} \to \gamma + \gamma \]. What is the energy of each \[\gamma \]ray if the \[{\pi ^0}\] is at rest when it decays?

    Found on Page 1212
  2. What lifetime do you expect for an antineutron isolated from normal matter?

    Found on Page 1210
  3. 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?

    Found on Page 1212
  4. Why does the \({\eta ^0}\) meson have such a short lifetime compared to most other mesons?

    Found on Page 1210
  5. A proton and an antiproton collide head-on, with each having a kinetic energy of 7.00TeV (such as in the LHC at CERN). How much collision energy is available, taking into account the annihilation of the two masses? (Note that this is not significantly greater than the extremely relativistic kinetic energy.)

    Found on Page 1212
  6. (a) Is a hadron always a baryon?

    Found on Page 1210
  7. When an electron and positron collide at the SLAC facility, they each have 50.0GeV kinetic energies. What is the total collision energy available, taking into account the annihilation energy? Note that the annihilation energy is insignificant, because the electrons are highly relativistic.

    Found on Page 1212
  8. Explain how conservation of baryon number is responsible for conservation of total atomic mass (total number of nucleons) in nuclear decay and reactions.

    Found on Page 1210
  9. The quark flavor changed \[ \to {\rm{u}}\] takes place in \[{\rm{\beta - }}\]decay. Does this mean that the reverse quark flavor changed \[{\rm{u}} \to \] takes place in \[{\rm{\beta + }}\] decay? Justify your response by writing the decay in terms of the quark constituents, noting that it looks as if a proton is converted into a neutron in \[{\rm{\beta + }}\]decay.

    Found on Page 1211
  10. The primary decay mode for the negative pion is \[{\pi ^ - } \to {\mu ^ - } + {\bar \nu _\mu }\]. What is the energy release in MeV in this decay?

    Found on Page 1212

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