Parton branching at amplitude level

Autor(en)

Jeffrey R. Forshaw, Jack Holguin, Simon Plätzer

Abstrakt

We present an algorithm that evolves hard processes at the amplitude level by dressing them iteratively with (massless) quarks and gluons. The algorithm interleaves collinear emissions with soft emissions and includes Coulomb/Glauber exchanges. It includes all orders in N-c, is spin dependent and is able to accommodate kinematic recoils. Although it is specified at leading logarithmic accuracy, the framework should be sufficient to go beyond. Coulomb exchanges make the factorisation of collinear and soft emissions highly non-trivial. In the absence of Coulomb exchanges, we show how factorisation works out and how a partial factorisation is manifest in the presence of Coulomb exchanges. Finally, we illustrate the use of the algorithm by deriving DGLAP evolution and computing the resummed thrust, hemisphere jet mass and gaps-between-jets distributions in e(+)e(-).

Organisation(en)

Teilchenphysik

Externe Organisation(en)

University of Manchester

Journal

Journal of High Energy Physics

Band

2019

Anzahl der Seiten

54

ISSN

1029-8479

Publikationsdatum

08-2019

Peer-reviewed

Ja

ÖFOS 2012

103012 Hochenergiephysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/02749227-c63a-4aff-90bb-40c114d4e6f6