Essential University Physics (3rd Edition)
Essential University Physics (3rd Edition)
3rd Edition
ISBN: 9780134202709
Author: Richard Wolfson
Publisher: PEARSON
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Chapter 39, Problem 61PP
To determine

The particle other than negative muon which is created in the decay of negative pion.

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When a proton and an antiproton annihilate, the resulting energy can be used to create new particles. One possibility is the creation of electrically neutral particles called neutral pions. A neutral pion has a rest mass of 135 MeV/c2. How many neutral pions could be produced in the annihilation of a proton and an antiproton? Assume the proton and antiproton are moving very slowly as they collide.
Accelerators such as the Triangle Universities Meson Facility (TRIUMF) in British Columbia produce secondary beams of pions by having an intense primary proton beam strike a target. Such “meson factories” have been used for many years to study the interaction of pions with nuclei and,hence, the strong nuclear force. One reaction that occurs isπ+ + p → Δ++ → π+ + p , where the Δ++ is a very short-lived particle. The graph shows the probability of this reaction as a function of energy. The width of the bump is the uncertainty in energy due to the short lifetime of the Δ++ .(a) Find this lifetime.(b) Verify from the quark composition of the particles that thisreaction annihilates and then re-creates a d quark and a d antiquark by writing the reaction and decay in terms ofquarks.(c) Draw a Feynman diagram of the production and decay ofthe Δ++ showing the individual quarks involved.
If a muon at rest decays into an electron and two neutrinos, what is the total kinetic energy of the decay products? Assume that the neutrinos have zero rest mass.       Express your answer in millions of electron volts to four significant figures.
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