Does strong force increase or decrease with aligned spins?

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SUMMARY

The discussion centers on the relationship between spin alignment and the residual strong force in nuclear physics. It concludes that while aligned spins in deuterium increase binding energy due to a stronger residual strong force, the aligned spins in the ##\Delta^{+}## particle lead to greater mass and decreased binding energy. This contradiction is further explored through the Weizsäcker formula, which indicates that paired spins (opposite alignment) enhance binding energy. The complexity of spin interactions suggests that the strong force can exhibit both attractive and repulsive characteristics based on spin alignment.

PREREQUISITES
  • Understanding of nuclear physics concepts, specifically the strong force
  • Familiarity with the Weizsäcker formula and its implications on binding energy
  • Knowledge of particle physics, particularly the properties of deuterium and ##\Delta^{+}## particles
  • Basic comprehension of spin alignment and its effects on particle interactions
NEXT STEPS
  • Research the Weizsäcker formula and its application in nuclear binding energy calculations
  • Study the properties and interactions of the ##\Delta^{+}## particle in particle physics
  • Explore the role of spin alignment in quantum mechanics and its implications for particle interactions
  • Investigate the dual nature of spin forces, including attractive and repulsive interactions
USEFUL FOR

Physicists, nuclear engineers, and students of particle physics seeking to deepen their understanding of the strong force and spin interactions in nuclear structures.

crick
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The deuterium exists only with the proton and neutron of aligned spin, which suggests that the residual strong force is greated with aligned spins, i.e. the binding energy is greater if the spins are aligned.

On the other hand the mass of ##\Delta^{+}## is greater than the mass of proton ##p##, even if they have the same quarks, since ##\Delta^+## has aligned spins of quarks. So it seems that here the binding energy decreases if spin are aligned (greater mass -> smaller binding energy).

Another fact in this sense is that in Weizsäcker formula the pairing term makes the binding energy of nucleus to increase if the spins are paired (i.e. opposite). (here the strong force is again residual as in deuterium)So how are these two consistent? Does the strong force increase with aligned spins?
 
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