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In this thesis we focus on the theoretical subtleties of the top-quark mass ($m_t$) determination, issue which persists in being highly controversial. In the first part of the thesis, we investigate the presence of linear renormalons in…

高能物理 - 唯象学 · 物理学 2019-02-14 Silvia Ferrario Ravasio

To explore the interplay of NLO matching and next-to-leading logarithmic (NLL) parton showers, we consider the simplest case of $\gamma^*$ and Higgs-boson decays to $q\bar q$ and $gg$ respectively. Not only should shower NLL accuracy be…

高能物理 - 唯象学 · 物理学 2023-10-25 Keith Hamilton , Alexander Karlberg , Gavin P. Salam , Ludovic Scyboz , Rob Verheyen

We show how a careful analysis of the behaviour of a parton shower Monte Carlo in the vicinity of the soft and collinear regions allows one to formulate a modified MC@NLO-matching prescription that reduces the number of negative-weight…

高能物理 - 唯象学 · 物理学 2020-08-26 R. Frederix , S. Frixione , S. Prestel , P. Torrielli

Carlo is a Monte Carlo simulation framework written in Julia. It provides MPI-parallel scheduling, organized storage of input, checkpoint, and output files, as well as statistical postprocessing. With a minimalist design, it aims to aid the…

计算物理 · 物理学 2025-02-12 Lukas Weber

We review the methods developed for combining the parton shower approximation to QCD with fixed-order perturbation theory, in such a way as to achieve next-to-leading-order (NLO) accuracy for inclusive observables. This has made it possible…

高能物理 - 唯象学 · 物理学 2015-06-04 Paolo Nason , Bryan Webber

In this short note we discuss the origin of spikes in physical distributions in dijet production, originating after the Monte Carlo shower of POWHEG Les Houches events. We introduce a refinement of the way in which the POWHEG BOX separates…

高能物理 - 唯象学 · 物理学 2013-03-19 Paolo Nason , Carlo Oleari

Photoproduction processes have gained a renewed interest following the approval of the EIC, making their implementation in Monte Carlo event generators highly desirable. We present recent efforts to develop a POWHEG BOX extension simulating…

高能物理 - 唯象学 · 物理学 2025-09-24 Alexander Feike , Tomáš Ježo , Michael Klasen

We briefly describe a new general algorithm for carrying out QCD calculations to next-to-leading order in perturbation theory. The algorithm can be used for computing arbitrary jet cross sections in arbitrary processes and can be…

高能物理 - 唯象学 · 物理学 2015-06-25 Stefano Catani , Michael H. Seymour

We present a next-to-leading order plus parton-shower event generator for the production of a W boson plus two bottom quarks and a jet at hadron colliders, implemented in the POWHEG BOX framework. Bottom-mass effects and spin correlations…

高能物理 - 唯象学 · 物理学 2015-05-20 Gionata Luisoni , Carlo Oleari , Francesco Tramontano

We propose an extension of matrix element plus parton shower merging at tree level to preserve inclusive cross sections obtained from the merged and showered sample. Implementing this constraint generates approximate next-to-leading order…

高能物理 - 唯象学 · 物理学 2015-06-12 Simon Platzer

We describe QWalk, a new computational package capable of performing Quantum Monte Carlo electronic structure calculations for molecules and solids with many electrons. We describe the structure of the program and its implementation of…

计算物理 · 物理学 2007-10-25 Lucas K. Wagner , Michal Bajdich , Lubos Mitas

We present the implementation of a next-to-leading-order plus parton-shower event generator for the hadronic production of a heavy charm quark accompanied by a leptonically-decaying $W$ boson in the POWHEG BOX RES framework. We consider…

高能物理 - 唯象学 · 物理学 2023-08-16 Silvia Ferrario Ravasio , Carlo Oleari

We propose a method for matching the next-to-leading order (NLO) calculation of a given QCD process with a parton shower Monte Carlo (MC) simulation. The method has the following features: fully exclusive events are generated, with…

高能物理 - 唯象学 · 物理学 2010-11-11 S. Frixione , B. R. Webber

In this work we present a new subtraction method for next-to-leading order calculations that is particularly convenient even when narrow resonances are present. The method is particularly suitable for the implementation of next-to-leading…

高能物理 - 唯象学 · 物理学 2016-01-27 Tomáš Ježo , Paolo Nason

We present a new Monte Carlo event generator for the hadronic production of four top quarks in the POWHEG BOX framework. Besides the dominant next-to-leading order QCD corrections at $\mathcal{O}(\alpha_s^5)$ we also include all subleading…

高能物理 - 唯象学 · 物理学 2022-07-06 Tomáš Ježo , Manfred Kraus

Recent progress in calculating lepton density functions inside the proton and simulating lepton showers laid the foundations for precision studies of resonant leptoquark production at hadron colliders. Direct quark-lepton fusion into a…

高能物理 - 唯象学 · 物理学 2022-12-14 Luca Buonocore , Admir Greljo , Peter Krack , Paolo Nason , Nudzeim Selimovic , Francesco Tramontano , Giulia Zanderighi

We present the version 2.0 of the program GoSam, which is a public program package to compute one-loop corrections to multi-particle processes. The extended version of the "Binoth-Les-Houches-Accord" interface to Monte Carlo programs is…

We present an implementation of electroweak Z-boson production in association with two jets at hadron colliders in the POWHEG framework, a method that allows the interfacing of NLO-QCD calculations with parton-shower Monte Carlo programs.…

高能物理 - 唯象学 · 物理学 2015-06-05 Barbara Jager , Steven Schneider , Giulia Zanderighi

We describe a novel switching algorithm based on a ``reverse'' Monte Carlo method, in which the potential is stochastically modified before the system configuration is moved. This new algorithm facilitates a generalized formulation of…

软凝聚态物质 · 物理学 2009-11-13 C. H. Mak , Arun K. Sharma

Monte Carlo event generators are essential components of almost all experimental analyses and are also widely used by theorists and experiments to make predictions and preparations for future experiments. They are all too often used as…

高能物理 - 唯象学 · 物理学 2013-04-25 Michael H. Seymour , Marilyn Marx