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Hi VubRecoil group, I am wondering if there might be a mistake in BAD 1383: (1) In Eq. 8, I think the denominator of the second term should be raised to the power of n, not 2. Is that correct? (2) The signal function drawn in Figure 4 LOOKS like it has: * x_c ~ 5.28 GeV = 5280 MeV * (alpha*sigma_l) ~ 1 GeV = 1000 MeV * sigma_l ~ sigma_R1, sigma_R2 However, according to Table 7: * x_c = 5.2795 GeV = 5279.5 MeV * (alpha*sigma_l) = 0.000008484 GeV = 0.008484 MeV * sigma_l << sigma_R1, sigma_R2 I tried to check by plotting the function with the given fit parameters in ROOT, but it did not work because ROOT could not handle the exponential of (x - x_c)/sigma_l, since sigma_l is so tiny. Am I missing something, or is there a mistake, or what? Thanks, sheila