what is antineutrino?
Answers
Antineutrinos are the antiparticles of neutrinos. The antineutrino is an elementary subatomic particle with infinitesimal mass (less than 0.3eV..?) and with no electric charge. Neutrinos and antineutrinos belong to the family of leptons, which means they do not interact via strong nuclear force.
There's not a simple answer to this question. I will attempt to avoid all the maths and Feynman diagrams....mostly because I have no way to produce decent graphics for them!
All neutrinos are paired with a lepton when produced. There are a wide variety of paired systems. You could write an entire book on the subject and indeed several physicists have done so.
With antineutrinos there are three "flavors," ...........electron.......muon......and tau.
These refer to the particular lepton paired with the neutrino. Specifically they address two aspects of antineutrino physics. Spin and interaction. Spin is....well...... spin!
Interaction is how the pair interact with particles and fields/energies that they encounter. It is suspected/theorized that they actually move backward in time! But to date there is no proof.
The primary identifier for them is that they exhibit negative entropy.....that is to say that they decay into stronger more organized structures rather than weaker less organized systems.
Needless to say they are incredibly difficult to study. We are really just beginning to scratch the surface of understanding how both neutrinos and antineutrinos function and effect matter and energy.