Why are vector mesons more massive than pseudoscalar mesons?

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SUMMARY

Vector mesons are more massive than pseudoscalar mesons primarily due to the spin-spin interactions associated with their respective quantum states, specifically J=0 for pseudoscalar mesons and J=1 for vector mesons. The discussion references the work "Decays of Heavy Vector Mesons into Higgs Particles" by Frank Wilczek, published in Phys. Rev. Lett. 39 (1977) 1304, which may provide further insights into this phenomenon. Access to this paper is often restricted to subscription-based journals, posing a challenge for researchers seeking detailed explanations.

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Homework Statement
Why are vector mesons more massive than pseudoscalar mesons? Not any sort of set problem, just reading but I can't find an answer or explanation
Relevant Equations
*
Problem Statement: Why are vector mesons more massive than pseudoscalar mesons? Not any sort of set problem, just reading but I can't find an answer or explanation
Relevant Equations: *

It's going to be something to do with the spin-spin interactions for J=0 and J=1. But then I don't see how to get an answer or explanation out of that.

Many thanks
 
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Please see "Decays of Heavy Vector Mesons into Higgs Particles", Frank Wilczek, Phys. Rev. Lett. 39 (1977) 1304.
 
Do you know where I can get access to this? Maybe an alternative source with similar content?

Currently it's all locked behind subscription journals etc...
 

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