Precision direct photon and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>W</mml:mi></mml:math>-boson spectra at high<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math>and comparison to LHC data

Becher, Thomas; Lorentzen, Christian; Schwartz, Matthew D.

doi:10.1103/physrevd.86.054026

Cited by 66 publications

(78 citation statements)

References 53 publications

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“…The resummation of logarithms should therefore only be a moderate effect. This observation was made earlier in [12,28,29], where it was found that resummation has a small effect on the central value but leads to somewhat reduced scale uncertainties. One sees from the plots that the scales determined from the NLO and NNLO corrections are almost identical, as they should be if there is a natural scale associated with the corrections.…”

Section: Jhep11(2014)026mentioning

confidence: 66%

“…In table 1, we present values for the cross section and the separate µ and µ f variations. When computing individual scale variations, a small amount of resummation is being performed because the RG-evolution factors in our resummed result become nontrivial (their explicit form was given in [12,29]). For this reason, we need to distinguish NLO sing +NLO from standard NLO.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The value of m X will depend on the shape of the PDFs and can in general only be determined numerically. Detailed studies of the size of the hard, jet and soft corrections for W and Z production were performed in [28,29] based on the method of [30]. An interesting alternative method to choose the proper scales was proposed recently in [31].…”

Section: Jhep11(2014)026mentioning

confidence: 99%

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The transverse-momentum spectrum of Higgs bosons near threshold at NNLO

Becher

Bell

Lorentzen

et al. 2014

J. High Energ. Phys.

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Abstract:We give next-to-next-to-leading order (NNLO) predictions for the Higgs production cross section at large transverse momentum in the threshold limit. Near the partonic threshold, all radiation is either soft or collinear to the final state jet which recoils against the Higgs boson. We find that the real emission corrections are of moderate size, but that the virtual corrections are large. We discuss the origin of these corrections and give numerical predictions for the transverse-momentum spectrum. The threshold result is matched to the known NLO result and implemented in the public code PeTeR.

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Section: Jhep11(2014)026mentioning

confidence: 66%

Section: Numerical Resultsmentioning

confidence: 99%

Section: Jhep11(2014)026mentioning

confidence: 99%

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The transverse-momentum spectrum of Higgs bosons near threshold at NNLO

Becher

Bell

Lorentzen

et al. 2014

J. High Energ. Phys.

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“…As long as the process involves N different directions, the amplitude can factorized at leading power into a sum of expressions of the form on the right-hand-side of Eq. (12). We choose to express factorization in the form of Eq.…”

Section: Power Counting Momentamentioning

confidence: 99%

“…For example, the most accurate calculations of the Higgs-boson cross section includes contributions from logarithmically enhanced terms derived using a factorization formula [7,8]. Other examples are the inclusive photon [9][10][11][12] or W -boson [13,14] transverse momentum spectrum, the tt cross section [15,16], and jet shapes such as jet mass [17][18][19] or n-subjettiness [20,21].…”

Section: Introductionmentioning

confidence: 99%

An on-shell approach to factorization

Feige

Schwartz

2013

Phys. Rev. D

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Factorization is possible due to the universal behavior of Yang-Mills theories in soft and collinear limits. Here, we take a small step towards a more transparent understanding of these limits by proving a form of perturbative factorization at treelevel using on-shell spinor helicity methods. We present a concrete and self-contained expression of factorization in which matrix elements in QCD are related to products of other matrix elements in QCD up to leading order in a power-counting parameter determined by the momenta of certain physical on-shell states. Our approach uses only the scaling of momenta in soft and collinear limits, avoiding any assignment of scaling behavior to unphysical (and gauge-dependent) fields. The proof of factorization exploits many advantages of helicity spinors, such as the freedom to choose different reference vectors for polarizations in different collinear sectors. An advantage of this approach is that once factorization is shown to hold in QCD, the transition to SoftCollinear Effective Theory is effortless.

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Introduction to Soft-Collinear Effective Theory

Becher

Broggio

Ferroglia

2015

Lecture Notes in Physics

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197

198

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These lectures provide an introduction to Soft-Collinear Effective Theory. After discussing the expansion of Feynman diagrams around the high-energy limit, the effective Lagrangian is constructed, first for a scalar theory, then for QCD. The underlying concepts are illustrated with the Sudakov form factor, i.e. the quark vector form factor at large momentum transfer. We then apply the formalism in two examples: We perform soft gluon resummation as well as transverse-momentum resummation for the Drell-Yan process using renormalization group evolution in SCET, and we derive the infrared structure of n-point gauge theory amplitudes by relating them to effective theory operators. We conclude with an overview of the different applications of the effective theory.

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Precision direct photon andW-boson spectra at highpTand comparison to LHC data

Cited by 66 publications

References 53 publications

The transverse-momentum spectrum of Higgs bosons near threshold at NNLO

The transverse-momentum spectrum of Higgs bosons near threshold at NNLO

An on-shell approach to factorization

Introduction to Soft-Collinear Effective Theory

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