Lower bounds on the constituent-quark mass differences

1 December 1989

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

Vol. 40 (11) , 3675-3678
https://doi.org/10.1103/physrevd.40.3675

Abstract

Using a potential-model approximation to quantum chromodynamics and the masses of ground-state mesons and baryons as input, we obtain lower bounds on the constituent-quark mass differences. We find

m_{d} - m_{u} > 4.1 \pm 0.3

MeV,

m_{s} - \bar{m} > 184 \pm 4

MeV,

m_{c} - m_{s} > 1180 \pm 4

MeV, and

m_{b} - m_{c} > 3343 \pm 4

MeV, where

\bar{m}

is the average mass of the

u

and

d

quarks.

Keywords

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