Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Question
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Chapter 44, Problem 7P

(a)

To determine

Identify the conservation which is violated for the reaction p+p¯μ++e.

(a)

Expert Solution
Check Mark

Answer to Problem 7P

Muon lepton number and electron lepton number are not conserved for p+p¯μ++e.

Explanation of Solution

Check for the charge conservation.

    C:0+01+1

Thus, charge is conserved.

Check for Baryon number conservation.

    B:(+1)+(1)0+0

Thus, baryon number is conserved.

Check for electron lepton number conservation.

    Le:0+00+1

Thus, electron lepton number is not conserved.

Check for muon lepton number conservation.

    Lμ:0+01+0

Thus, muon lepton number is not conserved.

Check for tau lepton number conservation.

    Lτ:0+00+0

Thus, tau lepton number is conserved.

Check for strangeness number conservation.

    S:0+00+0

Conclusion:

Therefore, the muon lepton number and electron lepton number are not conserved p+p¯μ++e.

(b)

To determine

Identify the conservation which is violated for the reaction p+p¯μ++e.

(b)

Expert Solution
Check Mark

Answer to Problem 7P

Charge is not conserved for π+pp+π+.

Explanation of Solution

Check for the charge conservation.

    C:1+01+(+1)

Thus, charge is not conserved.

Check for Baryon number conservation.

    B:0+00+0

Thus, baryon number is conserved.

Check for electron lepton number conservation.

    Le:0+00+0

Thus, electron lepton number is conserved.

Check for muon lepton number conservation.

    Lμ:0+00+0

Thus, muon lepton number is conserved.

Check for tau lepton number conservation.

    Lτ:0+00+0

Thus, tau lepton number is conserved.

Check for strangeness number conservation.

    S:0+00+0

Thus, strangeness is conserved.

Conclusion:

Therefore, Charge is not conserved for π+pp+π+.

(c)

To determine

Identify the conservation which is violated for the reaction p+pp+p+n.

(c)

Expert Solution
Check Mark

Answer to Problem 7P

Baryon number is not conserved for p+pp+p+n.

Explanation of Solution

Check for the charge conservation.

    C:(+1)+(+1)(+1)+(+1)+0

Thus, charge is conserved.

Check for Baryon number conservation.

    B:1+11+1+1

Thus, baryon number is not conserved.

Check for electron lepton number conservation.

    Le:0+00+0+0

Thus, electron lepton number is conserved.

Check for muon lepton number conservation.

    Lμ:0+00+0+0

Thus, muon lepton number is conserved.

Check for tau lepton number conservation.

    Lτ:0+00+0+0

Thus, tau lepton number is conserved.

Check for strangeness number conservation.

    S:0+00+0+0

Thus, strangeness is conserved.

Conclusion:

Therefore, baryon number is not conserved for p+pp+p+n.

(d)

To determine

Identify the conservation which is violated for the reaction γ+pn+π0.

(d)

Expert Solution
Check Mark

Answer to Problem 7P

Charge is not conserved for γ+pn+π0.

Explanation of Solution

Check for the charge conservation.

    C:0+10+0

Thus, charge is not conserved.

Check for Baryon number conservation.

    B:0+11+0

Thus, baryon number is conserved.

Check for electron lepton number conservation.

    Le:0+00+0

Thus, electron lepton number is conserved.

Check for muon lepton number conservation.

    Lμ:0+00+0

Thus, muon lepton number is conserved.

Check for tau lepton number conservation.

    Lτ:0+00+0

Thus, tau lepton number is conserved.

Check for strangeness number conservation.

    S:0+00+0

Thus, strangeness is conserved.

Conclusion:

Therefore, charge is not conserved for γ+pn+π0.

(e)

To determine

Identify the conservation which is violated for the reaction νe+pn+e+.

(e)

Expert Solution
Check Mark

Answer to Problem 7P

Electron lepton number is not conserved for νe+pn+e+.

Explanation of Solution

Check for the charge conservation.

    C:0+10+1

Thus, charge is conserved.

Check for Baryon number conservation.

    B:0+11+0

Thus, baryon number is conserved.

Check for electron lepton number conservation.

    Le:1+001

Thus, electron lepton number is not conserved.

Check for muon lepton number conservation.

    Lμ:0+00+0

Thus, muon lepton number is conserved.

Check for tau lepton number conservation.

    Lτ:0+00+0

Thus, tau lepton number is conserved.

Check for strangeness number conservation.

    S:0+00+0

Thus, strangeness is conserved.

Conclusion:

Therefore, the electron lepton number is not conserved for νe+pn+e+.

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