How is lepton number conserved in this interaction?

How is lepton number conserved in this interaction?

In order for both electron lepton number and muon lepton number to be conserved, then the other particles must be an electron anti-neutrino and a muon neutrino.

What is meant by lepton number?

In particle physics, lepton number (historically also called lepton charge) is a conserved quantum number representing the difference between the number of leptons and the number of antileptons in an elementary particle reaction.

Is lepton number conserved in electron capture?

If an electron neutrino is emitted, as in p+e⁻→n+νe , the sums of the lepton numbers are +1 on the left and +1 on the right. Lepton numbers are conserved.

What lepton number does an electron have?

1
A lepton is a particle not affected by the strong nuclear forces, but is only subjected to the weak forces. As such, electrons and neutrinos are leptons. A lepton number of 1 is assigned to both the electron and the neutrino and −1 to the antineutrino and the positron.

Is lepton number conserved in weak interactions?

Leptons are assigned a Lepton number (L). L = 1 for leptons and L = -1 for antileptons. Lepton number is conserved in all interactions. Strangeness is conserved in all but the weak interaction (this is because the weak interaction involves one type of quark changing into another as we have seen).

How many leptons are in lepton family?

six
There are six known leptons, and they occur in pairs, called generations, which we write as doublets: ( ν e e − ) , ( ν μ μ − ) , ( ν τ τ − ) . Each generation comprises a charged lepton with electric charge Q = −e, and a neutral lepton or neutrino.

What is lepton family number?

lepton number n. (Atomic Physics) physics a quantum number describing the behaviour of elementary particles, equal to the number of leptons present minus the number of antileptons. It is thought to be conserved in all processes. Symbol: l.

Is lepton number conserved in nuclear reaction?

One is to recall that lepton number is conserved in any nuclear equations. This means the total lepton number before an interaction must equal the total lepton number after an interaction.

Is lepton number conserved in strong interactions?

It is built into the Standard Model in terms of the allowed interactions (i.e.. allowed vertices) , but it is not a prediction of the theory in the same way that conservation of charge is. Strong interaction does not couple to leptons so conservation is trivial there. Lepton number is an additive quantum number.

How is lepton number calculated?

The lepton numbers Le, Lμ, and Lτ are violated separately, but the total lepton number L = Le + Lμ + Lτ is conserved. (93) In this case the neutrinos νi are the Dirac particles that possess the lepton number L = 1. The lepton number of the antineutrinos i is equal to −1.

What is lepton particle?

lepton, any member of a class of subatomic particles that respond only to the electromagnetic force, weak force, and gravitational force and are not affected by the strong force. The charged leptons are the electrons, muons, and taus. Each of these types has a negative charge and a distinct mass.