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Chapter 44: Q28P (page 1364)
What quark combination is needed to form (a) and (b)
(a) The quark combination of is.
(b) The quark combination of is .
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If Hubble’s law can be extrapolated to very large distances, at what distance would the apparent recessional speed become equal to the speed of light ?
Question: Verify that the hypothetical proton decay scheme in Eq. 44-14 does not violate the conservation law of
(a) charge,
(b) energy, and
(c) linear momentum.
(d) How about angular momentum?
Use the conservation laws and Tables 44-3 and 44-4 to identify particlein each of the following reactions, which proceed by means of the strong interaction: (a)(b)(c).
Use Wien’s law (see Problem 37) to answer the following questions: (a) The cosmic background radiation peaks in intensity at a wavelength of.To what temperature does this correspond? (b) About after the big bang, the universe became transparent to electromagnetic radiation. Its temperature then was . What was the wavelength at which the background radiation was then most intense?
There are baryons with spin .Their symbols and quantum numbers for charge and strangeness are as follows:
| q | S | q | S | ||
| -1 | 0 | 0 | -1 | ||
| 0 | 0 | +1 | -1 | ||
| +1 | 0 | -1 | -2 | ||
| +2 | 0 | 0 | -2 | ||
| -1 | -1 | -1 | -3 |
Make a charge–strangeness plot for these baryons, using the sloping coordinate system of Fig. 44-3. Compare your plot with this figure.
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