Difference between J/Psi and its excited states

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SUMMARY

The J/Psi particle is a charmonium state characterized by quantum numbers J=1, S=1, L=0, with J^{PC} = 1^{--}. Excited states, specifically ψ(3686) and ψ(3770), maintain the same quantum numbers but differ in energy and other properties. The ψ(3686) represents a radial excitation (n=2), while ψ(3770) has an orbital angular momentum L=2. The distinction in energy or properties necessitates a different naming convention for particles, often indicated by primes or additional symbols.

PREREQUISITES
  • Understanding of quantum numbers in particle physics
  • Familiarity with charmonium states
  • Knowledge of particle naming conventions based on properties
  • Basic concepts of radial and orbital excitations
NEXT STEPS
  • Research the properties of charmonium states in detail
  • Explore the significance of radial and orbital excitations in particle physics
  • Study the naming conventions for excited states in quantum mechanics
  • Examine the decay processes and interactions of J/Psi and its excited states
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Particle physicists, researchers in quantum mechanics, and students studying charmonium and its properties will benefit from this discussion.

bayners123
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The J/Psi is a state of charmonium with J=1, S=1, L=0. So J^{PC} = 1^{--}.
It can be excited to states J^\prime \textrm{ and } J^{\prime\prime}, but these don't change any of these numbers. So what is changing?
 
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The "charmonium" page in Wikipedia has a full list of the charmonium states and their quantum numbers. By J' and J'' do you mean ψ(3686) and ψ(3770)? These are the lowest lying states with JPC = 1--. Looks like the first one is a radial excitation, n = 2, and the second one has L = 2.
 
I did, thanks! I wasn't aware that radial excitation was possible without changing the name of the particle.
 
If the energy (or any other particle property) is different, the particle has a different name - sometimes, it is just an additional prime, a star or a number (denoting the approximate mass), but the name is different.
 

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