Open Access
Foundations of Perturbative QCD
TLDR
In this paper, a systematic treatment of perturbative QCD is given, giving an accurate account of the concepts, theorems and their justification, giving strong motivations for the methods.Abstract:
The most non-trivial of the established microscopic theories of physics is QCD: the theory of the strong interaction. A critical link between theory and experiment is provided by the methods of perturbative QCD, notably the well-known factorization theorems. Giving an accurate account of the concepts, theorems and their justification, this book is a systematic treatment of perturbative QCD. As well as giving a mathematical treatment, the book relates the concepts to experimental data, giving strong motivations for the methods. It also examines in detail transverse-momentum-dependent parton densities, an increasingly important subject not normally treated in other books. Ideal for graduate students starting their work in high-energy physics, it will also interest experienced researchers wanting a clear account of the subject.read more
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TMD factorization for dijet and heavy-meson pair in DIS
TL;DR: In this paper, a transverse momentum dependent (TMD) factorization framework for the processes of di-jet and heavy meson pair production in deepinelastic-scattering in an electron-proton collider was proposed.
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Locally finite two-loop amplitudes for off-shell multi-photon production in electron-positron annihilation
TL;DR: In this paper, the singularity structure of two-loop QED amplitudes for the production of multiple off-shell photons in massless electron-positron annihilation was studied and counterterms that removed their infrared and ultraviolet divergences point by point in the loop integrand.
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Calculating Soft Radiation at One Loop
TL;DR: In this article, the effect of soft QCD radiation at one loop was calculated for predictions at next-to-next-toleading logarithmic accuracy, using rapidity coordinates and isolate the divergences in the integrand.
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Calculating the angle between jet axes
Pedro Cal,Pedro Cal,Duff Neill,Felix Ringer,Felix Ringer,Wouter J. Waalewijn,Wouter J. Waalewijn +6 more
TL;DR: In this paper, the authors study the angle between the standard jet axis and the angle of a jet which has been groomed using soft drop, with reduced sensitivity to soft radiation, and calculate the distributions for these angles at next-to-leading logarithmic accuracy.
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The Sivers Asymmetry in Hadronic Dijet Production
TL;DR: In this paper, a QCD formalism in terms of the transverse momentum dependent parton distribution functions was proposed to resum the large logarithms that arise in the perturbative calculations.