What can a positive pion decay into?
Almost always, a positive pion decays into a muon and a muon neutrino, but in about one-in-12,000 instances, the positive pion decays into a positron and an electron neutrino.
Can a pion decay into an electron?
The primary decay mode of a Pion, with probability 0.999877, is a purely Leptonic decay into an anti-Muon and a Muon Neutrino. The second most common decay mode of a Pion, with probability 0.000123, is also a Leptonic decay into an Electron and the corresponding Electron anti-Neutrino.
What does a negative pion decay into?
The negative pion decays into a muon and a muon antineutrino as illustrated below. This decay is puzzling upon first examination because the decay into an electron plus an electron antineutrino yields much more energy.
How does a pion decay into a muon?
The charged pions decay through the semi-leptonic charged currents of the weak interactions: the charged pions go initially mostly to muon and neutrino. The neutral pion goes mostly to two photons through the anomaly and it has a much shorter lifetime than the charged pions.
What decays into a neutron and pion?
(f) The neutron and positive pion will then decay. The positive pion can decay into a positron and an electron neutrino. Write down the equation for the decay of the neutron….Topic Menu.
| Name | π+ | Proton |
|---|---|---|
| Relative charge | +1 | +1 |
| Baryon number | 0 | +1 |
| Quark composition | u ̅d̅ | uud |
Why do charged pions decay to muon?
Since the electron is not massless, it has a small left-handed component. The decay is suppressed, but not forbidden. The heavier muon has a larger left-handed component, and its decay is less suppressed. Hence, pions usually decay into muons, although they have less phase space available.
What charge does a pion have?
0
classification of subatomic particles The pi-meson, or pion, which is the lightest meson and an important component of cosmic rays, exists in three forms: with charge e (or 1), with charge 0, and with charge −e (or −1). In the positive state an up quark combines with a down antiquark;…
Do quarks decay?
Up and down quarks can decay into each other by emission of a W boson (this is the origin of beta decay due to the fact that the W can, depending on its type, decay into electrons, positrons and electron (anti-)neutrinos, ).
What is the quark composition of a positive pion?
The positively charged pion consists of a u quark and an anti-d quark. The proton, neutron, and pion are by no means the only particles which are made of quarks. All strongly interacting particles, known as baryons or mesons, are made of quarks.