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One decay mode for the eta-zero meson is $\eta^{0} \rightarrow \gamma+\gamma$ (a) Find the energy released. (b) What is the uncertainty in the energy due to the short lifetime? (c) Write that bary in terms of the constituent quarks. (d) Verify that baryon number, lepton numbers, and charge are conserved.

a. 547.5 $\mathrm{MeV}$b. $7 \times 10^{-4} \mathrm{MeV}$c. $\eta^{0}(u \overline{u}+d \overline{d}) \rightarrow \gamma+\gamma$

Physics 103

Chapter 33

Particle Physics

Cornell University

University of Washington

Hope College

Lectures

02:51

In physics, wave optics is…

10:02

Interference is a phenomen…

01:54

One decay mode for the eta…

01:28

(a) What is the uncertaint…

01:53

The principal decay mode o…

02:00

The decay mode of the nega…

02:35

One of the decay modes of …

05:05

Integrated Concepts The pr…

12:16

The primary decay mode for…

01:02

02:40

(a) Verify from its quark …

01:06

(a) Show that the conjectu…

Leptons, Hadrons, and Stra…

00:54

The $\eta^{0}$ particle is…

01:59

The decay mode of the posi…

01:11

(a) Is the decay $\Lambda^…

01:44

The main decay mode for th…

00:42

If you observe the decay $…

04:55

A $\phi$ meson (see Proble…

03:06

A $\pi^{0}$ meson is an un…

09:55

(a) Show that the proton-d…

01:34

The $\phi$ meson has mass …

off, Peter Zero going to drew photos. And first you want to know the energy release. The energy release will be the arrest. Energy rest, mass energy off the eaters, you know. So the energies will be just by 547.9. Maybe this is the rest mess off. Zero for part B. You want to know what is the answer? Editing energy doing toe the short lifetime. So we have their lifetime off, Peter. Zero being 2.5, I'm stand to the minus 19 seconds. So we have dealt a is you can tell a Djebar inch divide by far by there are 30 it is there And then this is for 0.135 I'm sensing minus 15 divided by four by I'm still 0.53 times 10 to the night minus 19. And then this issue by 00 darn thing and maybe visit dance entity in the energy. And finally, we want to write the barrios in terms off the constant winter and then verified the conservation off barrio and charged. So we have for part c we have you barred you and the body so they are in the mix state off this two states and then in the other side we just have photos off this government's grammar. And then for the conservation we have for barium. Here we have minus one minus one is one. So this is zero. And here we don't have an embarrassing zero in charge. We have 1/3 by INGE entered the room. And then here we have the charge zero and lapped. Omar. Truthfully, conserve. So everything here is served.

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