College Physics
1st Edition
ISBN: 9781938168048
Author: Paul Peter Urone, OpenStax, Roger Hinrichs
Publisher: OpenStax
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Textbook Question
Chapter 33, Problem 26PE
One decay mode for the eta−zero meson is
(a) Find the energy released.
(b) What is the uncertainty in the energy due to the short lifetime?
(c) Write the decay in terms at the constituent quarks.
(d) Verify that baryon number, lepton numbers, and charge are conserved.
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Chapter 33 Solutions
College Physics
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- The K0 meson is an uncharged member of the particle “zoo” that decays into two charged pions according to K0 → π+ + π−. The pions have opposite charges, as indicated, and the same mass, mπ = 140 MeV/c2. Suppose that a K0 at rest decays into two pions in a bubble chamber in which a magnetic field of 2.0 T is present (see Fig. P2.22). If the radius of curvature of the pions is 34.4 cm, find (a) the momenta and speeds of the pions and (b) the mass of the K0 meson.arrow_forwardAccelerators 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 is where the is every shortlived particle. The graph in Figure 33.26 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 at the (a) Find this lifetime. (b) Verify from the quark composition of the particles that this reaction annihilates and then recreates a d quark and a antiquark by writing the reaction and decay in terms of quarks. (c) Draw a Feynman diagram of the production and decay of the showing the individual quarks involved. Figure 33.26 This graph shows the probability of an interaction between a and a proton as a function of energy. The bump is interpreted as a very short lived particle called a The approximately 100MeV width of the bump is due to the short lifetime of thearrow_forward(a) Three quarks form a baryon. How many combinations of the six known quarks are there if all combinations are possible? (b) This number is less than the number of known baryons. Explain why.arrow_forward
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