Summary
It is shown by explicit evaluation that higher intermediate hadronic states give negative contributions to the proton-neutron mass difference. Such terms compensate for the positive value of the generalized Born approximation and lead in the present-model calculation to mp-mn≃-0.84 MeV.
Riassunto
Si mostra per mezzo di un calcolo esplicito che gli stati adronici intermedi superiori danno contributi negativi alla differenza di massa tra protone e neutrone. Questi termini compensano per il valore positivo dell'approssimazione di Born generalizzata e portano il calcolo del presente modello a mp-mn≃-0.84 MeV.
Резюме
Показывается, что высшие промежуточные адронные состояния дают отрицательные вклады в разность масс протона и нейтрона. Эти члены компенсируют положительную величину обобщенного борновского приближения и приводят в рамках предложенной модели к mp-mn≃-0.84 MeV.
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Supported by Consorzio per l'Incremento degli Studi e Ricerche di Fisica dell'Università di Trieste.
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Pevec, D., Zovko, N. The proton-neutron mass difference. Nuov Cim A 44, 202–210 (1978). https://doi.org/10.1007/BF02813392
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DOI: https://doi.org/10.1007/BF02813392