Hyperons, pions and an expanding universe

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Homework Help Overview

The discussion revolves around a problem involving the decay of a hyperon (Lambda zero) into a neutron and a pion, exploring concepts in particle physics and cosmology, particularly in relation to kinetic energy and photon detection in an expanding universe.

Discussion Character

  • Mixed

Approaches and Questions Raised

  • Participants discuss the decay process and the kinetic energy of the decay products, with specific questions about calculating total kinetic energy and the fraction of energy for each particle. There is also inquiry into the implications of the universe's expansion on the energy and wavelength of a photon detected on Earth.

Discussion Status

Some participants have provided guidance on translating the problem statement and emphasized the importance of showing work. There is an ongoing exploration of relevant equations and their application to the problem.

Contextual Notes

Participants are required to present their work and translate the problem from Spanish to English. The discussion includes constraints related to the universe's scale factor and its effect on photon properties.

Carlos_Ishigami07
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Homework Statement
what quantities are conserved in the decay of Lambda 0 and in the decay of pion 0
Relevant Equations
E(Lambda0) = E(n) + E(pi0)
E = squart(p^2*c^2 + m^2*c^4)
p(n) = p(pi0)
Screenshot_20210103-093458.jpg

Again sorry, it is in Spanish
 
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Sorry so much
 
Thanks
 
A hyperon at rest Lambda zero decays into a neutron and a zero pion. a) Determine the kinetic energies of the decay products. b) What fraction of the total kinetic energy is taken out of each particle? c) A physicist detects on Earth one of the two photons that are emitted in the decay of a zero pion. The zero pion was at rest in the cluster shown in Figure 44.19 before it decayed. What is the energy of the photon that is detected on Earth?
The Scale factor of the Universe is 0.35.
1610129099945469846245.jpg

The Universe expanded during the time the photon traveled to Earth. How does this affect the wavelength and energy of the photon that the physicist detects
 
Thanks, that helps. Now can you show us how you should apply the Relevant Equations that you listed to start working on the problem? :smile:
 
Thanks Berkeman
 

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