A charged pion & (π‡), an unstable particle of mass 140 MeV/c², is known to decayinto a muon (μ‡, mass 106 MeV/c²) and a neutrino (1; we can treat it as masslesshere). In this decay of pion (→ + ₁), typically only the muon is detected, theneutrino being an electrically neutral particle that rarely interact with other matter.Properties of neutrinos in this decay are inferred from measured properties of pion andmuon. Explain, as conceptually as possible, why it is not possible for a pion to simply decayinto a muon, without an associated neutrino. That is, why is this decay, π → Mt,impossible? (Note: If you happen to know about lepton numbers and neutrino flavors,please give an explanation that does not make use of concepts we have not yet covered.)

The explanation for the above process can be given in terms of the lepton number. Lepton numbers are…

Answered: A charged pion (π), an unstable…

Similar questions

Suppose that you have found a way to convert the rest energy of any type of matter directly to usable energy with an efficiency of 69.0%69.0%. How many liters of water would be sufficient fuel to very slowly push the Moon 3.10 mm3.10 mm away from the Earth? The density of water is ?water=1.00kg/literρwater=1.00kg/liter, the Earth's mass is ?earth=5.97×1024 kgMearth=5.97×1024 kg, the Moon's mass is ?moon=7.36×1022 kgMmoon=7.36×1022 kg, and the separation of the Earth and Moon is ?E,M=3.84×108 mdE,M=3.84×108 m.
Can a particle of mass m have total energy less than mc2? Explain.
While in flight, an unstable particle decays into three pions (rest mass 140 MeV/c²) according to figure 1. The kinetic energies and angles are: K₁ = 190 MeV, K₂ = 321 MeV, K3 = 58 MeV 0₁ = 22.4°, 0₂ = 12.25° Calculate the mass of the unstable particle.
3.4. Cosmic ray muons are produced high in the atmosphere (at 8000 m, say) and travel toward the earth at very nearly the speed of light (0.998 c, say). (a) Given the lifetime of the muon (2.2 x 10-6 sec), how far would it go before disintegrating, according to prerelativistic physics? Would the muons make it to ground level? (b) Now answer the same question using relativistic physics. (Because of time di- lation, the muons last longer, so they travel farther.) (c) Now analyze the same process from the perspective of the muon. (In its reference frame it only lasts 2.2 x 10-6 sec; how, then, does it make it to ground?) + (d) Pions are also produced in the upper atmosphere. [In fact, the sequence is proton (from outer space) hits proton (in atmosphere) → p + p + pions. The pions then decay into muons: ¯ → μ¯ + D µ; πt → μ† + vµ.] But the lifetime of the pion is much shorter, a hundredth that of the muon. Should the pions reach ground level? (Assume that the pions also have a speed of…
A kaon with a speed 0.8c in the laboratory decays into two pions, one positively charged and the other negatively charged. The rest mass of the kaon is 498 MeV/c2 and the rest mass of the pion is 140 MeV/c2. (a) What is the total energy of the kaon in the laboratory frame? (b) In the rest frame the two pions must go off in opposite directions to conserve momentum. What is the energy of each of the pions in the kaon rest frame? (c) Assume that the positive pion continues to travel in the same direction as the kaon was traveling. What is the total energy of each of the pions in the laboratory? (d) In what direction, relative to the kaon’s original direction of travel, does the negatively charged pion travel?
Can you please help with the attached question? Thanks!
Suppose that you have found a way to convert the rest energy of any type of matter directly to usable energy with an efficiency of 57.0%. How many liters of water would be sufficient fuel to very slowly push the Moon 1.50 mm away from the Earth? The density of water is Pwater = 1.00kg/liter, the Earth's mass is Mearth 5.97 x 1024 kg, the Moon's mass is М, = 7.36 x 1022 kg, and the separation of the Earth and Moon is de.M 3.84 x 10° m. moon water: Liters
A particle is propagating at relativistic speed. It is observed to have an energy of 3.1 GeV and a momentum of 7.34E-19 kg.m/s. Determine the mass of that particle, expressed in units of 1E-27kg and keeping three significant digits. (So if the mass was 7E-27kg, you would enter 7).
The Kº meson is a subatomic particle of mass 498 MeV/c² that decays into two charged pions, Kº→++. The and have opposite charges, but the same mass, 140. MeV/c². A Kº at rest decays into two pions. Find the energies, momenta, and speeds of the two pions.
A beam of π+meson (pions) at Fermilab are traveling at a speed of 0.92cwithrespect to the laboratory. The proper mean lifetime for these pions is 2.6×10−8s.(a) Is this proper lifetime measured in the laboratory frame or the frame of the pions?Why? (b) What is the mean lifetime as measured in the other frame of reference?
The Tevatron was a large particle accelerator that would collide beams ofprotons and anti-protons to see what would come out of the collisions.a) Let’s assume that each particle (in both beams) was accelerated to a total energy of100 GeV. What is the speed of the protons (relative to the speed of light) if you assumethe mass of the proton is equal to 1 GeV/c^2? Write your answer in terms of the speed oflight—keep it as a decimal times “c”. You will need several decimal places.b) Suppose that you now accelerate each particle to a speed of 0.9c. Since they are movingin opposite directions, what is the speed that one would measure for the speed of the otherparticle? Just give the absolute value of this speed. Don’t worry about the sign.c) Given your answer in part b, what is the energy of that one particle would measure forthe other particle?
Consider electrons accelerated to a total energy of 20.0 GeV in the 3.00-km-long Stanford Linear Accelerator. (a) What is the γ factor for the electrons? (b) How long does the accelerator appear to the electrons? Electron mass energy: 0.511 MeV.

SEE MORE QUESTIONS