-
Home
- College physics
- Particle physics
- Particles, patterns, and
Conceptual questions
Large quantities of antimatter isolated from normal matter should behave exactly like normal matter. An antiatom, for example, composed of positrons, antiprotons, and antineutrons should have the same atomic spectrum as its matter counterpart. Would you be able to tell it is antimatter by its emission of antiphotons? Explain briefly.
Got questions? Get instant answers now!
Massless particles must travel at the speed of light, while others cannot reach this speed. Why are all massless particles stable? If evidence is found that neutrinos spontaneously decay into other particles, would this imply they have mass?
Got questions? Get instant answers now!
When a star erupts in a supernova explosion, huge numbers of electron neutrinos are formed in nuclear reactions. Such neutrinos from the 1987A supernova in the relatively nearby Magellanic Cloud were observed within hours of the initial brightening, indicating they traveled to earth at approximately the speed of light. Explain how this data can be used to set an upper limit on the mass of the neutrino, noting that if the mass is small the neutrinos could travel very close to the speed of light and have a reasonable energy (on the order of MeV).
Got questions? Get instant answers now!
Theorists have had spectacular success in predicting previously unknown particles. Considering past theoretical triumphs, why should we bother to perform experiments?
Got questions? Get instant answers now!
Problems&Exercises
The
is its own antiparticle and decays in the following manner:
. What is the energy of each
ray if the
is at rest when it decays?
Got questions? Get instant answers now!
The primary decay mode for the negative pion is
. What is the energy release in MeV in this decay?
Got questions? Get instant answers now!
The mass of a theoretical particle that may be associated with the unification of the electroweak and strong forces is
.
(a) How many proton masses is this?
(b) How many electron masses is this? (This indicates how extremely relativistic the accelerator would have to be in order to make the particle, and how large the relativistic quantity
would have to be.)
(a)
(b)
Got questions? Get instant answers now!
The decay mode of the negative muon is
.
(a) Find the energy released in MeV.
(b) Verify that charge and lepton family numbers are conserved.
Got questions? Get instant answers now!
The decay mode of the positive tau is
.
(a) What energy is released?
(b) Verify that charge and lepton family numbers are conserved.
(c) The
is the antiparticle of the
.Verify that all the decay products of the
are the antiparticles of those in the decay of the
given in the text.
(a)
(b)
(c)
Got questions? Get instant answers now!
The principal decay mode of the sigma zero is
.
(a) What energy is released?
(b) Considering the quark structure of the two baryons, does it appear that the
is an excited state of the
?
(c) Verify that strangeness, charge, and baryon number are conserved in the decay.
(d) Considering the preceding and the short lifetime, can the weak force be responsible? State why or why not.
Got questions? Get instant answers now!
(a) What is the uncertainty in the energy released in the decay of a
due to its short lifetime?
(b) What fraction of the decay energy is this, noting that the decay mode is
(so that all the
mass is destroyed)?
(a) 3.9 eV
(b)
Got questions? Get instant answers now!
(a) What is the uncertainty in the energy released in the decay of a
due to its short lifetime?
(b) Is the uncertainty in this energy greater than or less than the uncertainty in the mass of the tau neutrino? Discuss the source of the uncertainty.
Got questions? Get instant answers now!
Questions & Answers
number of sport play by 50 student construct discrete data
width of the frangebany leaves on how to write a introduction
Solve the mean of variance
Step 1: Find the mean. To find the mean, add up all the scores, then divide them by the number of scores. ...
Step 2: Find each score's deviation from the mean. ...
Step 3: Square each deviation from the mean. ...
Step 4: Find the sum of squares. ...
Step 5: Divide the sum of squares by n – 1 or N.
kenneth
Is mistake done to something
Vutshila
What is the life teble
anas
statistics is the analyzing of data
how do you calculate mean
diveving the sum if all values
Shaynaynay
let A1,A2 and A3 events be independent,show that (A1)^c, (A2)^c and (A3)^c are independent?
data collected all over the world
Shaynaynay
construct a less than and more than table
The sample of 16 students is taken. The average age in the sample was 22 years with astandard deviation of 6 years. Construct a 95% confidence interval for the age of the population.
Bhartdarshan' is an internet-based travel agency wherein customer can see videos of the cities they plant to visit. The number of hits daily is a normally distributed random variable with a mean of 10,000 and a standard deviation of 2,400
a. what is the probability of getting more than 12,000 hits?
b. what is the probability of getting fewer than 9,000 hits?
Bhartdarshan'is an internet-based travel agency wherein customer can see videos of the cities they plan to visit. The number of hits daily is a normally distributed random variable with a mean of 10,000 and a standard deviation of 2,400.
a. What is the probability of getting more than 12,000 hits
Akshay
Sorry i want to learn more about this question
Bright
a= 0.20233
b=0.3384
Sufiyan
How do I interpret level of significance?
It depends on your business problem or in Machine Learning you could use ROC- AUC cruve to decide the threshold value
Shivam
how skewness and kurtosis are used in statistics
Got questions? Join the online conversation and get instant answers!
Source:
OpenStax, College physics. OpenStax CNX. Jul 27, 2015 Download for free at http://legacy.cnx.org/content/col11406/1.9
Google Play and the Google Play logo are trademarks of Google Inc.