Chapter 39: Problem 21
What baryons have the quark composition \(u d s\) ? What is the mass of these baryons?
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Electron and positron beams are collided, and pairs of tau leptons are produced. If the angular distribution of the tau leptons varies as \(\left(1+\cos ^{2} \theta\right),\) what fraction of the tau lepton pairs will be captured in a detector that covers only the angles from \(60^{\circ}\) to \(120^{\circ} ?\)
What is the de Broglie wavelength of an alpha particle that has a kinetic energy of \(100 .\) MeV? According to Figure \(39.13,\) how does this wavelength compare to the size of structure that can be probed with this alpha particle?
A Geiger-Marsden experiment, in which alpha particles are scattered off a thin gold film, is set up with two detectors at \(\theta_{1}=85.1^{\circ} \pm 0.9^{\circ}\) and \(\theta_{2}=62.9^{\circ} \pm 0.9^{\circ} .\) Assuming that the scattering obeys the Rutherford formula, what is the ratio of the measured intensities, \(I_{1} / I_{2} ?\)
Evaluate the form factor and the differential cross section, \(d \sigma / d \Omega\) for a beam of electrons scattering off a thin spherical shell of total charge \(Z e\) and radius \(a\). Could this scattering experiment distinguish between thinshell and solid-sphere charge distributions? Explain.
Which of the following is a composite particle? (select all that apply) a) electron b) neutrino c) proton d) muon
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