Estimates ofmd−muand〈d¯d〉−〈u¯u〉from QCD sum rules forDandD*isospin mass differences

1 August 1993

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 48 (3) , 1441-1444
https://doi.org/10.1103/physrevd.48.1441

Abstract

The recent experimental data on

D^{+} - D^{0}

and

D^{* +} - D^{* 0}

mass differences are used as inputs in the QCD sum rules to obtain new estimates on the mass difference of light quarks and on the difference of their condensates:

m_{d} - m_{u} = 3 \pm 1

MeV,

〈 \bar{d} d 〉 - 〈 \bar{u} u 〉 = - (2.5 \pm 1) \times 10^{- 3} 〈 \bar{u} u 〉

(at a standard normalization point,

μ = 0.5

GeV).

Keywords

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Version 1, 1993-02-24, ArXiv

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