Changes between Version 27 and Version 28 of ComplexMassScheme


Ignore:
Timestamp:
Aug 20, 2015, 2:28:53 AM (9 years ago)
Author:
Valentin Hirschi
Comment:

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  • ComplexMassScheme

    v27 v28  
    2222Before we detail the option of this test, here is the expected output (generated automatically, incl. this plot) for the case of QCD and QED corrections to fully decayed top quark pair production:
    2323
    24 [[Image(gg_epvemumvmxbbx_widthsx1prct.jpg,460)]] [[Image(gg_epvemumvmxbbx_inverted_logs.jpg,500)]]
     24[[Image(gg_epvemumvmxbbx_widthsx1prct.jpg,446)]] [[Image(gg_epvemumvmxbbx_inverted_logs.jpg,500)]]
    2525
    2626In the upper inset, we clearly see the finite width effects for large values of $\lambda$. These become progressively smaller and indiscernible below $10^{-3}$. When dividing this difference by lambda, as done in the lower inset, we only see a mild deviation with respect to a constant. Changing the LO width used for the test by as little as 0.1 % already yields a larger $\kappa^{\text{NLO}}_0$ than the residual one stemming from numerical inaccuracies. The figure on the right shows that incorrectly setting the analytical continuation of UV wavefunctions counterterms logarithms yields an asymptotic value of several thousands in the $\Delta^{NLO}/\lambda$ plot. This clearly establishes the sensitivity of the test towards any incorrect CMS implementation at NLO.