Concept explainers
(a)
The rest mass energy of the Boson
Answer to Problem 24Q
The rest mass energy of the Boson
Explanation of Solution
Given:
The mass of the intermediate Boson is
Formula used:
The expression of the energy is given by,
Here,
Calculation:
The mass of the intermediate boson is calculated as,
The rest mass energy of the Boson
Convert the energy in
Conclusion:
The rest mass energy of the Boson
(b)
The threshold temperature for the
Answer to Problem 24Q
The threshold temperature for
Explanation of Solution
Formula used:
The expression for the relation of energy and temperature is given by,
Here,
Calculation:
The threshold temperature for
Conclusion:
The threshold temperature for
(c)
The time taken by
Answer to Problem 24Q
The time taken by
Explanation of Solution
Introduction:
After the big bang, the temperature of the initial universe tends to decreases. All the forces and particles were bound together in the initial universe, but after the decrement in the temperature the particles got separated.
The figure showing the change in the energy of the particles and the temperature of the universe with respect to time from the big bang is shown below:
Figure (1)
The time taken from the big bang for
Conclusion:
Therefore, the time taken by
Want to see more full solutions like this?
Chapter 26 Solutions
Universe: Stars And Galaxies
- (a) What is the uncertainty in the energy released in the decay of a due to its short lifetime? (b) Is the uncertainty in 1his energy greater than or lees than the uncertainty in the mass of the tau neutrino? Discuss the source of the uncertainty.arrow_forwardSuppose you are designing a proton decay experiment and you can detect 50 percent of the proton decays in a tank of water. (a) How many kilograms of water would you need to see one decay per month, assuming a lifetime of 1031 y? (b) How many cubic meters of water is this? (c) If the actual lifetime is 1033 y, how long would you have to wait on an average to see a single proton decay?arrow_forward(a) Verify from its quark composition that the particle could be an excited state of the proton. (b) There is a spread of about 100 MeV in the decay energy of the interpreted as uncertainty due to its short lifetime. What is its approximate lifetime? (c) Does its decay proceed via the strong or weak force?arrow_forward
- The primary decay mode for the negative pion is +v . (a) What is the energy release in MeV in this decay? (b) Using conservation of momentum, how much energy does each of the decay products receive, given the is at rest when it decays? You may assume the muon antineutrino is massless and has momentum p = E/c , just like a photon.arrow_forwardThe peak intensity of the CMBR occurs at a wavelength of 1.1 mm. (a) What is the energy in eV at a 1.1mm photon? (b) There are approximately 109 photons for each massive particle in deep space. Calculate the energy of 109 such photons. (c) If the average massive particle in space has a mass half that of a proton, what energy would be created by convening its mass to enemy? (d) Does this imply that space is “matter dominated”? Explain briefly.arrow_forwardWhat is for a proton having amass energy of 938.3 MeV accelerated through an effective potential of 1.0 TV (teravolt)?arrow_forward
- (a) What is the kinetic energy in MeV of a ray that is traveling at 0.998c? This gives some idea of how energetic a ray must be to travel at nearly the same speed as a ray. (b) What is the velocity of the ray relative to the ray?arrow_forward(a) What particle has the quark composition u-u-d? (b) What should its decay made be?arrow_forwardThe distance of a galaxy from our solar system is 10 Mpc. (a) What is the recessional velocity of the galaxy? (b) By what fraction is the starlight from this galaxy red shifted (that is, what is its z value)?arrow_forward
- Modern PhysicsPhysicsISBN:9781111794378Author:Raymond A. Serway, Clement J. Moses, Curt A. MoyerPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781938168000Author:Paul Peter Urone, Roger HinrichsPublisher:OpenStax College
- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningUniversity Physics Volume 3PhysicsISBN:9781938168185Author:William Moebs, Jeff SannyPublisher:OpenStax