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Joint INFN-UNIMI-UNIMIB Pheno Seminars
Top-quark mass effects in H+jet and H+dijet production
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Europe/Zurich
https://fisica-unimi.zoom.us/j/93511686241?pwd=RjBVT3Nvdno1bnlvbEw2N2VhL2NyZz09
https://fisica-unimi.zoom.us/j/93511686241?pwd=RjBVT3Nvdno1bnlvbEw2N2VhL2NyZz09
Description
The measurement of the transverse momentum distribution of the Higgs boson is a key observable at the LHC, due to its sensitivity to BSM physics. To obtain reliable theoretical predictions of this observable for the dominant gluon-fusion contributions, it is necessary to take the top-quark mass into account, since the commonly used heavy-top limit is not valid for large transverse momenta. In this talk, we will first present a calculation of H+jet at NLO QCD with the full top-quark mass dependence taken into account. The two-loop virtual amplitudes are calculated numerically using sector decomposition. We then present NLO predictions for H+2 jets within an approximation, that keeps the exact top-mass dependence in most parts of the calculation, but avoids the evaluation of 2-loop virtual matrix elements.
