% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@PHDTHESIS{Ebert:333147,
      author       = {Ebert, Markus},
      othercontributors = {Tackmann, Frank},
      title        = {{P}recision {P}redictions for {H}iggs {D}ifferential
                      {D}istributions at the {LHC}},
      school       = {Universität Hamburg},
      type         = {Dissertation},
      address      = {Hamburg},
      publisher    = {Verlag Deutsches Elektronen-Synchrotron},
      reportid     = {PUBDB-2017-08764, DESY-THESIS-2017-033},
      series       = {DESY-THESIS},
      pages        = {217},
      year         = {2017},
      note         = {Dissertation, Universität Hamburg, 2017},
      abstract     = {After the discovery of a Standard-Model-like Higgs boson at
                      the LHCa central aspect of the LHC physics program is to
                      studythe Higgs boson's couplings to Standard Model particles
                      in detailin order to elucidate the nature of the Higgs
                      mechanismand to search for hints of physics beyond the
                      Standard Model.This requires precise theory predictions for
                      both inclusiveand differential Higgs cross sections.In this
                      thesis we focus on the application of resummation
                      techniquesin the framework of Soft-Collinear Effective
                      Theory (SCET)to obtain accurate predictions with reliable
                      theory uncertaintiesfor various observables.We first
                      consider transverse momentum distributions,where the
                      resummation of large logarithms in momentum (or
                      distribution) spacehas been a long-standing open question.We
                      show that its two-dimensional nature leads to additional
                      difficultiesnot observed in one-dimensional observables such
                      as thrust,and solving the associated renormalization group
                      equations (RGEs)in momentum space thus requires a very
                      careful scale setting.This is achieved using distributional
                      scale setting,a new technique to solve differential
                      equations such as RGEs directly in distribution space,as it
                      allows one to treat logarithmic plus distributions like
                      ordinary logarithms.We show that the momentum space solution
                      fundamentally differs from the standard resummationin
                      Fourier space by different boundary terms to all orders in
                      perturbation theoryand hence provides an interesting and
                      complementary approach to obtain new insightinto the
                      all-order perturbative and nonperturbative structure
                      oftransverse momentum distributions.Our work lays the ground
                      for a detailed numerical study of themomentum space
                      resummation.We then show that in the case of a discovery of
                      a new heavy color-singlet resonancesuch as a heavy Higgs
                      boson, one can reliably and model-independently inferits
                      production mechanism by dividing the data into two mutually
                      exclusive jet bins.The method is based on a resummation
                      framework that preciselypredicts the jet cut dependence and
                      systematically incorporates theory uncertaintiesand their
                      correlations among the jet bins. The technique is
                      demonstratedfor an example scalar resonance of mass $m_X =
                      750~\mathrm{GeV}$.It can also be applied to and tested in
                      diphoton productionwhich receives contributions from both
                      quark annihilation and gluon fusion.Here, the presence of
                      final state photons requires photon isolation cutswhich
                      yield unresummed nonglobal logarithms.As a first step
                      towards the full analysis, we show that these are
                      numerically smalland can be incorporated in fixed-order
                      perturbation theory.Vice versa, we find that the jet veto
                      renders contributions from fragmentation photons power
                      suppressed,and thus is a particularly clean channel to study
                      direct diphoton production at the LHC.Lastly, we discuss the
                      resummation of timelike logarithms $\ln^2(-1)=-\pi^2$in
                      Higgs production, arising in the form factor at timelike
                      momentum transfer.Their resummation is well understood in
                      exclusive cross sections known to factorize.We show how to
                      consistently incorporate the resummation into inclusive
                      cross sections,discussing in detail the validity of the
                      technique and associated uncertainties.The method is first
                      applied to the total cross section in gluon fusion Higgs
                      productionat N$^3$LO$+$N$^3$LL$^\prime$, where it
                      significantly improves perturbative convergenceand reduces
                      perturbative uncertainties by about a factor of two.We also
                      obtain the currently most precise Higgs rapidity spectrum at
                      NNLO$+$NNLL$^\prime$with a similar reduction of
                      uncertainties.The effect is less pronounced in bottom-quark
                      annihilation,but still shows that the resummation of
                      timelike logarithmsis a beneficial and viable tool for Higgs
                      production.},
      cin          = {T},
      cid          = {I:(DE-H253)T-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF3-611) / PHGS,
                      VH-GS-500 - PIER Helmholtz Graduate School
                      $(2015_IFV-VH-GS-500)$},
      pid          = {G:(DE-HGF)POF3-611 / $G:(DE-HGF)2015_IFV-VH-GS-500$},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      doi          = {10.3204/PUBDB-2017-08764},
      url          = {https://bib-pubdb1.desy.de/record/333147},
}