Jet veto resummation for pp→Hpp \to H+jet with NNLL′'+NNLO uncertainties

Many Higgs analyses divide the data into exclusive jet bins since the background decomposition changes considerably depending on the number of jets in the final state. In this talk we present our work on exclusive Higgs+jet production via gluon fusion, with a veto on additional jets. We perform the resummation of jet-veto logarithms to NNLL′ accuracy, using a different factorization theorem than previous theory predictions for this process. We match the resummed cross section to the NNLO fixed order result, and treat unknown quantities as theory nuisance parameters

Power Counting Energy Flow Polynomials

Power counting is a systematic strategy for organizing collider observables and their associated theoretical calculations.In this paper, we use power counting to characterize a class of jet substructure observables called energy flow polynomials (EFPs).EFPs provide an overcomplete linear basis for infrared-and-collinear safe jet observables, but it is known that in practice, a small subset of EFPs is often sufficient for specific jet analysis tasks.By applying power counting arguments, we obtain linear relationships between EFPs that hold for quark and gluon jets to a specific order in the power counting.We test these relations in the parton shower generator \Pythia, finding excellent agreement. Power counting allows us to truncate the basis of EFPs without drastically affecting performance, which we corroborate through a study of quark-gluon tagging and regression

Power Counting Energy Flow Polynomials

Power counting is a systematic strategy for organizing collider observables and their associated theoretical calculations. In this paper, we use power counting to characterize a class of jet substructure observables called energy flow polynomials (EFPs). EFPs provide an overcomplete linear basis for infrared-and-collinear safe jet observables, but it is known that in practice, a small subset of EFPs is often sufficient for specific jet analysis tasks. By applying power counting arguments, we obtain linear relationships between EFPs that hold for quark and gluon jets to a specific order in the power counting. We test these relations in the parton shower generator Pythia, finding excellent agreement. Power counting allows us to truncate the basis of EFPs without affecting performance, which we corroborate through a study of quark-gluon tagging and regression

The qTq_T spectrum for Higgs production via heavy quark annihilation at N3^3LL′'+aN3^3LO

We study the transverse momentum ($q_T$) spectrum of the Higgs boson produced via the annihilation of heavy quarks ($s,c,b$) in proton-proton collisions. Using soft-collinear effective theory (SCET) and working in the five-flavour scheme, we provide predictions at three-loop order in resummed perturbation theory (N$^3$LL$'$). We match the resummed calculation to full fixed-order results at next-to-next-to-leading order (NNLO), and introduce a decorrelation method to enable a consistent matching to an approximate N$^3$LO (aN$^3$LO) result. Since the $b$-quark initiated process exhibits large nonsingular corrections, it requires special care in the matching procedure and estimation of associated theoretical uncertainties, which we discuss in detail. Our results constitute the most accurate predictions to date for these processes in the small $q_T$ region and could be used to improve the determination of Higgs Yukawa couplings from the shape of the measured Higgs $q_T$ spectrum

The qTq_T spectrum for Higgs production via quark annihilation at N3^3LL′'+ aN3^3LO

Due to the limited detector resolution and the challenges involving the tagging of individual quark flavors, it is difficult to measure the Yukawa coupling of bottom, charm and strange quarks from the final state.A precise prediction of the $q_T$ sprectrum for Higgs production via quark annihilation allows to access the Yukawa coupling for bottom and lighter quarks from the inital state as the $q_T$ spectra of the quark flavors show a different shape.Especially in the peak region this allows for a possible discrimination of bottom, charm, and strange initiated production once a full treatment of mass effects is included.I will present an N$^3$LL$'$+ approximate N$^3$LO prediction for Higgs production via quark annihilation where I will in particular focus on the differences to the related Drell-Yan process