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The s-channel cross section is measured to be $\\sigma(p\\bar{p} \\to tb+X) = 1.10^{+0.33}_{-0.31}$ pb with no assumptions on the value of the t-channel cross section. Similarly, the t-channel cross section is measured to be $\\sigma(p\\bar{p} \\to tqb+X) = 3.07^{+0.54}_{-0.49}$ pb. 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