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# A $\Sigma^{0}$ particle traveling through matter strikes a proton. A $\Sigma^{+},$ a gamma ray, as well as a third particle, emerge. Use the quark model of each to determine the identity of the third particle.

## Reaction is:$\Sigma^{0}+\mathrm{p} \rightarrow \gamma+\sum^{+}+x$At quark level:uds + uud $\rightarrow$ uus $+0+?$Unknown particle contain quarks udd which is neutron

Nuclear Physics

Particle Physics

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##### Christina K.

Rutgers, The State University of New Jersey

##### Jared E.

University of Winnipeg

### Video Transcript

this question were given full indirection involving signal burial colliding with a proton to give similar plus plus a summary and unknown Partick over here, which is X. So we're gonna use the clock model to identify what ist unknown article. And we're gonna look at the conservation off this clock composition on the clock Babies clocks. Right. So first off, we will need the information regarding quote composition off devious particles 40 Sigma zero Burial. This is up. Don't strange for Proton. Stop down for the signal. Plus it is up. Strange, right? So by conservation off the clock, different types off quarks, we should be able to identify what it sex. So on the left inside we have a total number off tree up clocks, two down quarks and one strange What? The right hand side. We have two up quarks and one street quote. Right? So, in order to have the same number off clocks, what we have missing over here is one o'clock and to dunk. All right, this is missing. And this must be from X, right? Since Gummer actually has no cox, it doesn't contain any quirks, so it must be from X and what, Quark or what particle do we know? Contents. Clinton. Off! Up, down, down. That must be E. So I'm known that go would be a neutral

National University of Singapore

#### Topics

Nuclear Physics

Particle Physics

##### Christina K.

Rutgers, The State University of New Jersey

##### Jared E.

University of Winnipeg