Speaker
Description
Higgs boson production in association with a charm-quark jet proceeds through two different mechanisms – one that involves the charm Yukawa coupling and the other one that involves direct Higgs coupling to gluons. The interference of the two contributions requires a helicity flip and, therefore, cannot be computed with massless charm quarks. In this talk, I will discuss how the NLO QCD corrections to this interference can be computed starting from charm-gluon collisions with massive charm quarks and then taking, carefully, the massless limit. I will discuss how one can resum large logarithms of the charm mass from initial states collinear emissions. Then, I will mention that the necessity of a helicity flip implies unconventional behavior of the QCD cross sections in singular limits. Finally, some results will be presented.
