Electromagnetic mass differences of N and Δ in the Skyrme model

Bing An Li, Mu Lin Yan, Keh Fei Liu

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


The electromagnetic mass differences of p, n and Δ++, Δ+, Δ0, Δ- are evaluated in the Skyrme model. In order to explain the observed proton-neutron mass difference, a new term which corresponds to the down-up quark mass difference has to be introduced. With Mp = Mn as an input which requires md-mu = 2 MeV, we predict the mass differences MΔ++-MΔ+, MΔ+-MΔ0 and MΔ0-MΔ-.

Original languageEnglish
Pages (from-to)409-412
Number of pages4
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
StatePublished - Sep 18 1986

Bibliographical note

Funding Information:
This work is supported in part by the DOE grant No. DE-FG05-84ER40154 and DOE contract No. DE-AC02-76ER13001. One of us (B.A.L.) would like to acknowledge the hospitality of Professor C.N. Yang and K.F. Liu would like to acknowledge the hospitality received while visiting the Physics Department in SUNY/Stony Brook.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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