The Economical <svg style="vertical-align:-4.53427pt;width:232.325px;" id="M1" height="21.6875" version="1.1" viewBox="0 0 232.325 21.6875" width="232.325" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(.022,-0,0,-.022,.062,15.975)"><path id="x1D446" d="M457 488l-30 -3q-17 148 -131 148q-53 0 -84.5 -34.5t-31.5 -82.5q0 -42 25.5 -72t74.5 -62l33 -22q63 -42 95 -85t32 -102q0 -84 -67 -137t-163 -53q-58 0 -113 22t-70 43l-4 152l27 4q4 -32 15 -62.5t31 -59.5t53.5 -47t76.5 -18q56 0 92 35t36 96q0 39 -25 70t-78 68
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<table>One-loop contributions to the downquark mass matrix (<a href="https://static.hindawi.com/articles/ahep/volume-2008/739492/figures/#eq210">4.55</a>) or (<a href="https://static.hindawi.com/articles/ahep/volume-2008/739492/figures/#eq211">4.56</a>).</table>

Advances in High Energy Physics

fig18

Figure 18

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Advances in High Energy Physics

The Economical Model

Figure 18