Quark mass differences and ρ-ω Mixing

Paul Langacker

Research output: Contribution to journalReview articlepeer-review

52 Scopus citations


The experimental data on ρ-ω mixing are reanalyzed in order to extract a new value for the ratio r-=(md-mu)2ms, where mi is the current quark mass of quark i. After correcting for the purely electromagnetic contribution to the mixing, one obtains r-=0.010±0.002, which agrees well with the average r-=0.014±0.003 obtained previously from kaon and baryon mass differences and the η→3π decay and disagrees substantially with the value ±(0.031±0.007) that would be required if mu or md were zero. A new determination of the current quark mass ratios, including the effects of ρ-ω mixing, then yields mumd=0.47±0.11 and mdms=0.042±0.007.

Original languageAmerican English
Pages (from-to)2983-2985
Number of pages3
JournalPhysical review D
Issue number11
StatePublished - 1979

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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