Wie wird der Spin von kurzlebigen Teilchen bestimmt?

Es steht, dass diese Baryonen einen Spin von 3/2 haben:

Wie werden die Spins von Baryonen mit solcher kurzer Lebensdauer bestimmt?
Denn direkt messen lässt sich der Spin nicht wegen kleiner Reichweite?
Wie würde sich ein Spin von 3/2 äußern im Magnetfeld etc. ?

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Reggid
2 years ago

from the spin and the exact angular distribution of the decay products.

Reggid
2 years ago
Reply to  ZuNiceFrage

the spin is determined from the spin?

from the spin of the decay products

do the decay products always fly apart after the collision with certain angles?

No.

but the probability distribution is different.

and from this can the spin be determined?

yes

see you here https://arxiv.org/abs/2007.14700 FIG. 2, where different spin-parity hypotheses are compared against the data

Reggid
2 years ago

but the magneton of a particle is μ=(q/2m)·ħ

yes, and the spin has nothing to do with the mass.

I am not clear how the magnetic moments affect the angular distribution of the pulses so that you can make conclusions about the magnetic moments

it is not about the magnetic moments. it’s about the spin.

the torque is a tumbler. if a particle decays with a specific self-rotation pulse (=spin), then this torque naturally has an influence on the exact angular distribution of the decay products. because the spins of the decay products + their relative rotational pulse must again result in the spin of the exit particle. also results from the dynamics of the interaction over which the decay runs that certain configurations are suppressed and others are more likely. the weak interaction allows for example only neutrinos with spin antiparallel to the pulse and antineutrinos with spin parallel to the pulse, etc.

can be derived from this for certain sizes as they depend on the spin of the decaying particle, and if you can measure this size you have the possibility to determine this spin, even if the particle is very short-lived.

Reggid
2 years ago

magnetic moment, load and mass mean different spin.

load and mass have nothing to do with the spin.

by interaction with particles, another probability distribution occurs,

a particle breaks into several others.

the pulses of the decay products are measured.

can be drawn from the angular distribution of these pulses via the spin.

KimMell
2 years ago

I can’t say that you did this. But in connection with other short-lived particles, I have heard, one proceeds in such a way that the decay products and their trajectory are measured and then, in the evaluation (a.k.a., how exactly one makes them) is returned to this particle.

A spin 3/2 in the direction of the magnetic field has a corresponding effect, such as a spin 1/2 in the direction of the magnetic field, only stronger, since it also corresponds to a stronger magnetic moment. In the case of a spin 3/2 particles, however, this does not mean that the projection on the magnetic field is actually 3/2, but also 1/2, −1/2 and −3/2 are possible.

Maybe a little rough the answer, but better than nothing, lol