3 years ago

reSolve - A Transverse Momentum Resummation Tool.

Francesco Coradeschi, Thomas Cridge

In this note, we introduce the new tool reSolve, a Monte Carlo differential cross-section and parton-level event generator whose main purpose is to add transverse momentum resummation to a general class of inclusive processes at hadron colliders, namely all those which do not involve hadrons or jets in the measured final state. This documentation refers to our beta version release, which is still very much a work in progress and only has a partial implementation of the features we ultimately plan to include in the final release. Whilst highlighting key aspects of the resummation formalism applied, this article acts as a manual for the program; describing in detail its use, structure and validation. A main concept behind the development of the tool is that it is meant to be a hands-on white box for the user: a lot of effort was made into giving the program a modular structure, making the various parts which comprise it as much as possible independent of each other, transparently documented, customizable and, in principle, completely replaceable with something that may serve better the user's needs. reSolve is a new C++ program, based on an evolution of the private Fortran code 2gres, previously used for the calculations in refs. [1] and [2]. This initial version calculates the low transverse momentum contribution to the fully differential cross-section for the inclusive production of two photons, including resummation up Next-to-Next- to-Leading Logarithm (NNLL). We aim to extend the program to several more processes in the near future. The program is made publicly available on Github.

Publisher URL: http://arxiv.org/abs/1711.02083

DOI: arXiv:1711.02083v1

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