4.5 Article

Subleading effects in soft-gluon emission at one-loop in massless QCD

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Physics, Particles & Fields

The LBK theorem to all orders

Tim Engel

Summary: We study the soft limit of one-photon radiation at next-to-leading power (NLP) in the framework of heavy-quark effective theory (HQET) to all orders in perturbation theory. We establish the soft theorem that for unpolarised scattering the radiative contribution up to NLP is entirely determined by the non-radiative amplitude. This generalises the Low-Burnett-Kroll (LBK) theorem for QED to all orders. All hard matching corrections can be calculated by applying the LBK differential operator to the non-radiative amplitude. The virtual corrections in the effective theory vanish beyond one loop, resulting in a one-loop exact soft function. As a first, non-trivial application we calculate the real-virtual-virtual electron-line corrections to muon-electron scattering at NLP in the soft limit.

JOURNAL OF HIGH ENERGY PHYSICS (2023)

Article Physics, Particles & Fields

Radiative quark jet function with an external gluon

Ze Long Liu et al.

Summary: Factorization theorems in soft-collinear effective theory at subleading order involve radiative jet functions defined in terms of matrix elements of hard-collinear fields with a soft momentum emitted from inside the jet. This study focuses on the radiative jet function with an external gluon, calculating it at one- and two-loop order, deriving its one-loop anomalous dimension, and studying its renormalization-group evolution.

JOURNAL OF HIGH ENERGY PHYSICS (2022)

Article Computer Science, Interdisciplinary Applications

Expansion by regions with pySecDec

G. Heinrich et al.

Summary: We discuss the technique of expansion by regions and its implementation within pySecDec, a toolbox for evaluating dimensionally regulated parameter integrals. The program offers an automated way to perform asymptotic expansions and provides a new mechanism for efficiently evaluating amplitudes and individual integrals.

COMPUTER PHYSICS COMMUNICATIONS (2022)

Article Physics, Particles & Fields

Gravitational soft theorem from emergent soft gauge symmetries

Martin Beneke et al.

Summary: In this paper, we consider and derive the gravitational soft theorem from the perspective of effective Lagrangians. The emergent soft gauge symmetries of the effective Lagrangian explain the universal nature of soft graviton emission, and provide a physical interpretation of the soft factors.

JOURNAL OF HIGH ENERGY PHYSICS (2022)

Article Physics, Particles & Fields

Universal structure of radiative QED amplitudes at one loop

T. Engel et al.

Summary: We present two novel results on the universal structure of radiative QED amplitudes in the soft and collinear limits. One result extends the well-known Low-Burnett-Kroll theorem to one-loop level and provides the explicit relation between radiative and non-radiative amplitudes in the subleading power in the soft limit. The other result considers a factorization formula at leading power in the limit where the emitted photon becomes collinear to a light fermion and gives the corresponding one-loop splitting function. These findings are important for fully-differential higher-order QED calculations and can improve the numerical stability of radiative contributions in the soft and collinear regions.

JOURNAL OF HIGH ENERGY PHYSICS (2022)

Article Physics, Particles & Fields

Soft-collinear gravity beyond the leading power

Martin Beneke et al.

Summary: Soft-collinear gravity is an effective field theory that describes the interaction of collinear and soft gravitons with matter. It exhibits similarities with soft-collinear effective theory of QCD, revealing an emergent soft background gauge symmetry and controlling the collinear field components and inherent inhomogeneity in lambda of invariant objects. This results in a consistent expansion.

JOURNAL OF HIGH ENERGY PHYSICS (2022)

Article Astronomy & Astrophysics

Towards all-order factorization of QED amplitudes at next-to-leading power

E. Laenen et al.

Summary: We extend the factorization of Abelian gauge theory amplitudes to the next-to-leading power (NLP) level in a soft scale expansion, introducing new universal jet functions and addressing endpoint divergences. This new factorization framework provides a first step towards a complete all-order description of gauge-theory amplitudes at NLP, considering virtual collinear modes and the interplay of nontrivial hard-collinear effects beyond one-loop level.

PHYSICAL REVIEW D (2021)

Article Physics, Particles & Fields

Factorization at subleading power and endpoint-divergent convolutions in h → γγ decay

Ze Long Liu et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

Article Physics, Particles & Fields

Threshold factorization of the Drell-Yan process at next-to-leading power

Martin Beneke et al.

JOURNAL OF HIGH ENERGY PHYSICS (2020)

Article Physics, Particles & Fields

Unveiling regions in multi-scale Feynman integrals using singularities and power geometry

B. Ananthanarayan et al.

EUROPEAN PHYSICAL JOURNAL C (2019)

Article Physics, Particles & Fields

Violation of the Kluberg-Stern-Zuber theorem in SCET

Martin Beneke et al.

JOURNAL OF HIGH ENERGY PHYSICS (2019)

Article Computer Science, Interdisciplinary Applications

RECOLA2: REcursive Computation of One-Loop Amplitudes 2

Ansgar Denner et al.

COMPUTER PHYSICS COMMUNICATIONS (2018)

Article Physics, Particles & Fields

Calculations with off-shell matrix elements, TMD parton densities and TMD parton showers

Marcin Bury et al.

EUROPEAN PHYSICAL JOURNAL C (2018)

Article Physics, Particles & Fields

Universality of next-to-leading power threshold effects for colourless final states in hadronic collisions

V. Del Duca et al.

JOURNAL OF HIGH ENERGY PHYSICS (2017)

Article Astronomy & Astrophysics

Soft photon theorem for high energy amplitudes in Yukawa and scalar theories

Hualong Gervais

PHYSICAL REVIEW D (2017)

Article Computer Science, Interdisciplinary Applications

R E C O L A - REcursive Computation of One-Loop Amplitudes

Stefano Actis et al.

COMPUTER PHYSICS COMMUNICATIONS (2017)

Article Computer Science, Interdisciplinary Applications

COLLIER: A fortran-based complex one-loop library in extended regularizations

Ansgar Denner et al.

COMPUTER PHYSICS COMMUNICATIONS (2017)

Article Physics, Particles & Fields

Non-abelian factorisation for next-to-leading-power threshold logarithms

D. Bonocore et al.

JOURNAL OF HIGH ENERGY PHYSICS (2016)

Article Computer Science, Interdisciplinary Applications

Numerical evaluation of multi-gluon amplitudes for High Energy Factorization

M. Bury et al.

COMPUTER PHYSICS COMMUNICATIONS (2015)

Article Astronomy & Astrophysics

The method of regions and next-to-soft corrections in Drell-Yan production

D. Bonocore et al.

PHYSICS LETTERS B (2015)

Article Physics, Particles & Fields

A factorization approach to next-to-leading-power threshold logarithms

D. Bonocore et al.

JOURNAL OF HIGH ENERGY PHYSICS (2015)

Article Physics, Particles & Fields

Soft theorems from effective field theory

Andrew J. Larkoski et al.

JOURNAL OF HIGH ENERGY PHYSICS (2015)

Article Astronomy & Astrophysics

Low-energy behavior of gluons and gravitons from gauge invariance

Zvi Bern et al.

PHYSICAL REVIEW D (2014)

Article Astronomy & Astrophysics

Constraining subleading soft gluon and graviton theorems

Johannes Broedel et al.

PHYSICAL REVIEW D (2014)

Article Physics, Particles & Fields

Soft sub-leading divergences in Yang-Mills amplitudes

Eduardo Casali

JOURNAL OF HIGH ENERGY PHYSICS (2014)

Article Physics, Particles & Fields

Expansion by regions: revealing potential and Glauber regions automatically

Bernd Jantzen et al.

EUROPEAN PHYSICAL JOURNAL C (2012)

Article Physics, Particles & Fields

The singular behavior of one-loop massive QCD amplitudes with one external soft gluon

Isabella Bierenbaum et al.

NUCLEAR PHYSICS B (2012)

Article Computer Science, Interdisciplinary Applications

ONELOOP: For the evaluation of one-loop scalar functions

A. van Hameren

COMPUTER PHYSICS COMMUNICATIONS (2011)

Article Physics, Particles & Fields

Scalar one-loop 4-point integrals

A. Denner et al.

NUCLEAR PHYSICS B (2011)

Article Physics, Particles & Fields

Foundation and generalization of the expansion by regions

Bernd Jantzen

JOURNAL OF HIGH ENERGY PHYSICS (2011)

Article Physics, Particles & Fields

Automated one-loop calculations: a proof of concept

A. van Hameren et al.

JOURNAL OF HIGH ENERGY PHYSICS (2009)

Article Physics, Particles & Fields

CutTools: a program implementing the OPP reduction method to compute one-loop amplitudes

Giovanni Ossola et al.

JOURNAL OF HIGH ENERGY PHYSICS (2008)

Article Physics, Particles & Fields

Reduction schemes for one-loop tensor integrals

A Denner et al.

NUCLEAR PHYSICS B (2006)

Article Computer Science, Interdisciplinary Applications

JaxoDraw: A graphical user interface for drawing Feynman diagrams

D Binosi et al.

COMPUTER PHYSICS COMMUNICATIONS (2004)

Article Physics, Particles & Fields

Reduction of one-loop tensor 5-point integrals

A Denner et al.

NUCLEAR PHYSICS B (2003)

Article Astronomy & Astrophysics

One-loop singular behaviour of QCD and SUSY QCD amplitudes with massive partons

S Catani et al.

PHYSICS LETTERS B (2001)

Article Physics, Particles & Fields

The soft-gluon current at one-loop order

S Catani et al.

NUCLEAR PHYSICS B (2000)