17,270 research outputs found
Resummation of High Order Corrections in Boson Plus Jet Production at the LHC
We study the multiple soft gluon radiation effects in boson plus jet
production at the LHC. By applying the transverse momentum dependent
factorization formalism, the large logarithms introduced by the small total
transverse momentum of the boson plus jet final state system, are resummed
to all orders in the expansion of the strong interaction coupling at the
accuracy of Next-to-Leading Logarithm(NLL). We also compare the prediction of
our resummation calculation to the CMS data by employing a reweighting
procedure to estimate the effect from imposing kinematic cuts on the leptons
from boson decay, and find good agreement for both the imbalance transverse
momentum and the azimuthal angle correlation of the final state boson and
jet system, for production at the LHC.Comment: 7 pages, published versio
Soft Gluon Resummation in -channel single top quark production at the LHC
We present a detailed phenomenological study of the multiple soft gluon
radiation for the -channel single top and anti-top quark production at the
Large Hadron Collider (LHC). By applying the transverse momentum dependent
factorization formalism, large logarithms introduced by small total transverse
momentum of the single-top (anti-top) plus one-jet final state system
are resummed to all orders in the expansion of the strong interaction coupling
at the accuracy of Next-to-Leading Logarithm. We discuss various kinematical
distributions which are sensitive to this effect and find that soft gluon
radiation become more important when the final state jet is required to be in
the forward region. We show that the main difference from PYTHIA prediction
lies on the inclusion of the exact color coherence effect between the initial
and final states in our resummation calculation. We further propose to apply
the experimental observable to test the effect of multiple gluon
radiation in the single-top and anti-top events. The bottom quark mass effect
and jet rapidity distribution are also discussed.Comment: 22 pages. arXiv admin note: substantial text overlap with
arXiv:1801.09656, arXiv:1811.0142
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