B Are the electron and neutrino that are emitted in a beta decay entangled?

[rjhoward12447]

TL;DR Summary

In a hard vacuum, is the electron and the neutrino emitted in a beta decay entangled?

This is a question.

In a hard vacuum, is the electron and the neutrino emitted in a beta decay entangled?

I searched the web. The question does not seem to appear there.

The only reason for the hard vacuum is to allow the electron time before it interacts with other matter. I don't see any practical experiment to answer the question. Neutrinos are too difficult to detect. Assuming the spins are entangled, how does one detect the spin of a neutrino?

 

[Nugatory]

In a hard vacuum, is the electron and the neutrino emitted in a beta decay entangled?

You are thinking about the decay of an isolated neutron? Beta decay of a neutron in an atomic nucleus brings in a bunch of other complications, but either way there’s also a daughter proton to consider.

All of the daughter particles are entangled on energy, momentum, and angular momentum. They do not have a definite value for any of these properties until an interaction with something else (for example, a measurement) breaks the entanglement and the wave function collapses to a state in which the values are consistent with the conservation laws for these properties.

I don't see any practical experiment to answer the question. Neutrinos are too difficult to detect. Assuming the spins are entangled, how does one detect the spin of a neutrino?

not easily. https://journals.aps.org/pr/pdf/10.1103/PhysRev.109.1015 for example

 

[Hornbein]

TL;DR Summary: In a hard vacuum, is the electron and the neutrino emitted in a beta decay entangled?

This is a question.

In a hard vacuum, is the electron and the neutrino emitted in a beta decay entangled?

I searched the web. The question does not seem to appear there.

The only reason for the hard vacuum is to allow the electron time before it interacts with other matter. I don't see any practical experiment to answer the question. Neutrinos are too difficult to detect. Assuming the spins are entangled, how does one detect the spin of a neutrino?

My rule of thumb is "if it can be entangled, it will be."

 

[PeterDonis]

My rule of thumb is "if it can be entangled, it will be."

Murphy's Law of Entanglement?

 

[Meir Achuz]

Depending on the type of beta decay, the electron and neutrino spins will be entangled.