Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 12: Q7CQ (page 555)

Identify a process that exhibits CT violations and explain how you know it does? Is violation of time-reversal invariance (T) in any way strange for a macroscopic process?

Short Answer

Expert verified

In our universe, there is a lot of matter, but almost no anti-matter, which exhibitsCT violation.The violation of time-reversal invariance (T) is not strange for a macroscopic process since, as far as we know, almost without exception, macroscopic processes are irreversible in time.

Step by step solution

01

Given data

violation.

02

Concept of CT violation

CTviolationis the violation of combinedconservation lawsassociated withcharge conjugation(C)andtime reversal (T)by theatomicinteractions.

03

Explanation of the process that exhibitsCPviolation

In our universe, there is a lot of matter, but almost no anti-matter, which exhibits CTviolation.

We know the physics laws must be different for particles and anti-particles because there is almost no anti-matter left in the universe today.

The violation of time-reversal invariance (T) is not strange for a macroscopic process since, as far as we know, almost without exception, macroscopic processes are irreversible in time.

Hence, we do not have time travel.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Sketch the Feynman diagram if the proposed decay is possible.

Δ+→Σ++π0+γ

If a neutrino interacted with a quark every time their separation was within the 10−18 m range generally accepted for the weak force, then the cross-section of a neutron or proton “seen” by a neutrino would be on the order of 10−36 m2. Even at such separation, however the probability of interactions is quite small. The nucleon appears to have an effective cross-section of only about 10−48 m2.

(a) About how many nucleons are there in a column through the earth’s center of 1 m2 cross-sectional area?

(b) what is the probability that a given neutrino passing through space and encountering earth will actually “hit”?

In the following exercises, two protons are smashed together in an attempt to convert kinetic energy into mass and new particles. Indicate whether the proposed reaction is possible. If not, indicate which rules are violated. Consider only those for charge, angular momentum, and baryon number If the reaction is possible, calculate the minimum kinetic energy required of the colliding protons.

p+p→p+p+p+p¯

Exercise 23 discusses the threshold energy for two particles of mass m in a colliding beam accelerator to produce a final stationary mass M. If the accelerator is instead a stationary target type, more initial kinetic energy is needed to produce the same final mass. Show the threshold energy is M22m-2mc2.

Does the requirement of color neutrality for a real particle prohibit the existence of hadrons containing 4 quarks? 5 quarks?Any number? If so, why? If not, what rules would apply?
See all solutions

Recommended explanations on Physics Textbooks

Oscillations

Read Explanation

Rotational Dynamics

Read Explanation

Electricity

Read Explanation

Fluids

Read Explanation

Further Mechanics and Thermal Physics

Read Explanation

Famous Physicists

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free