7,296 research outputs found
Next-to-next-to-leading order -jettiness soft function for production
We calculate the -jettiness soft function for production up to
next-to-next-to-leading order in QCD, which is an important ingredient of the
-jettiness subtraction method for predicting the differential cross sections
of massive coloured particle productions. The divergent parts of the results
have been checked using the renormalization group equations controlled by the
soft anomalous dimension.Comment: 14 pages, 3 figures, published version in PL
Fully Differential Higgs Pair Production in Association With a Boson at Next-to-Next-to-Leading Order in QCD
To clarify the electroweak symmetry breaking mechanism, we need to probe the
Higgs self-couplings, which can be measured in Higgs pair productions. The
associated production with a vector boson is special due to a clear tag in the
final state. We perform a fully differential next-to-next-to-leading-order
calculation of the Higgs pair production in association with a boson at
hadron colliders, and present numerical results at the 14 TeV LHC and a future
100 TeV hadron collider.Comment: 7 pages, 7 figures, matched to the published version in PL
Soft gluon resummation in the signal-background interference process of
We present a precise theoretical prediction for the signal-background
interference process of , which is useful to constrain the
Higgs boson decay width and to measure Higgs couplings to the SM particles. The
approximate NNLO -factor is in the range of (),
depending on , at the 8 (13) TeV LHC. And the soft gluon resummation
can increase the approximate NNLO result by about at both the 8 TeV and
13 TeV LHC. The theoretical uncertainties including the scale, uncalculated
multi-loop amplitudes of the background and PDF are roughly
at . We also confirm that the approximate
-factors in the interference and the pure signal processes are the same.Comment: 18 pages, 9 figures; v2 published in JHE
Renormalization-group improved predictions for Higgs boson production at large
We study the next-to-next-to-leading logarithmic order resummation for the
large Higgs boson production at the LHC in the framework of
soft-collinear effective theory. We find that the resummation effects reduce
the scale uncertainty significantly and decrease the QCD NLO results by about
in the large region. The finite top quark mass effects and the
effects of the NNLO singular terms are also discussed.Comment: 31 pages, 17 figures, version published in Phys.Rev.
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