Question

Do neutrinos have mass?

Answer 1

yes they absolutely have mass

Answer 2

Hey There!!

Neutrinos are very interesting particles, as they hardly interact with anything. They are so small that it seems like that they have no mass. However, Neutrinos do have mass.


In some radioactive decay processes, we noticed that the final angular momentum was lesser than what was initial. This hinted at the presence of a very tiny particle, which we now call as the Neutrinos. 

Neutrinos come under the category of Leptons.

Now, the common way to measure the mass of a particle is this:

Einstein's Mass-Energy Equivalence states:
$E = mc^2 \\ \\ \\ \implies m = \frac{E}{c^2}$


Thus, we can write mass in the unit of $Energy / c^2$ unit.

For extremely small particles like neutrinos, we use the unit of energy known as electron-volt


1 electron-volt is the energy that one electron would gain when it is accelerated through a potential difference of 1 volt. Symbol: eV

$1 \, \, eV = 1.6 \times 10^{-19} \, \, J$


Now, there are three kinds of neutrinos. We will name them with their mass:

1) Electron Neutrino


Symbol: $\nu_{e}$

Mass: < 2.2 $eV / c^2$


2) Muon Neutrino


Symbol: $\nu_{\mu}$
Mass: <1.7 $MeV / c^2$


3) Tau Neutrino


Symbol: $\nu_{\tau}$

Mass: < 15.5 $MeV / c^2$



The masses are not exact, because we have only been able to detect the maximum possible mass, and then the neutrinos hardly interact with anything. 


In future, the DUNE Project is launching. DUNE stands for Deep Underground Neutrino Experiment, and it will be the largest neutrino study experiment in the history of the world.

We hope to get better ideas about neutrinos then.


Hope it helps
Purva
Brainly Community