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The hard-scattering contributions to heavy-to-light form factors at large recoil are studied systematically in soft-collinear effective theory (SCET). Large logarithms arising from multiple energy scales are resummed by matching QCD onto…

High Energy Physics - Phenomenology · Physics 2009-11-10 Richard J. Hill , Thomas Becher , Seung J. Lee , Matthias Neubert

We review a recently proposed phenomenological framework to establish the notions of QCD factorization and universality of jet cross sections in the heavy-ion environment. First results of a global analysis of the nuclear modification…

High Energy Physics - Phenomenology · Physics 2021-02-03 Jian-Wei Qiu , Felix Ringer , Nobuo Sato , Pia Zurita

In this paper we study the factorization and resummation of s-channel single top quark production in the Standard Model at both the Tevatron and the LHC. We show that the production cross section in the threshold limit can be factorized…

High Energy Physics - Phenomenology · Physics 2011-04-04 Hua Xing Zhu , Chong Sheng Li , Jian Wang , Jia Jun Zhang

We study jet physics in the high energy regime of QCD. Based on the NLO BFKL equation, we construct a vertex for the production of a jet at central rapidity in k_T-factorization. A jet algorithm is introduced, and we take special care of…

High Energy Physics - Phenomenology · Physics 2007-05-23 Florian Schwennsen

To maximize the discovery potential of high-energy colliders, experimental searches should be sensitive to unforeseen new physics scenarios. This goal has motivated the use of machine learning for unsupervised anomaly detection. In this…

High Energy Physics - Phenomenology · Physics 2024-08-30 Eric M. Metodiev , Jesse Thaler , Raymond Wynne

Recent observations of the spectrum of J/psi produced in e+ e- collisions at the Upsilon(4S) resonance are in conflict with fixed-order calculations using the Non-Relativistic QCD (NRQCD) effective field theory. One problem is that leading…

High Energy Physics - Phenomenology · Physics 2008-11-26 Sean Fleming , Adam K. Leibovich , Thomas Mehen

Structure function of e+e- to hadrons cross section proportional to the longitudinal part of the hadron tensor is power suppressed with respect to an event shape variable in the two-jet region. In the SCET framework, we study the event…

High Energy Physics - Phenomenology · Physics 2010-10-28 Kaoru Hagiwara , Grigory Kirilin

We use soft-collinear effective theory (SCET) to study the factorization properties of deep inelastic scattering in the region of phase space where 1-x = O(Lambda_{QCD/Q}). By applying a regions analysis to loop diagrams in the Breit frame,…

High Energy Physics - Phenomenology · Physics 2009-11-11 Ben D. Pecjak

Recent measurements of jet structure modifications at RHIC and LHC highlight the importance of differential measurements to study the nature of jet quenching. Since these jet structure observables are intimately dependent on parton…

High Energy Physics - Experiment · Physics 2019-03-29 Raghav Kunnawalkam Elayavalli

The consistency of collinear factorization violation with PDF factorization has been an outstanding challenge and subject of considerable debate. In this work we demonstrate their compatibility using a factorization theorem for non-global…

High Energy Physics - Phenomenology · Physics 2025-09-10 Thomas Becher , Patrick Hager , Sebastian Jaskiewicz , Matthias Neubert , Dominik Schwienbacher

We derive a factorization theorem for the jet mass distribution with a given $p_T^J$ for the inclusive production, where $p_T^J$ is a large jet transverse momentum. Considering the small jet radius limit $(R\ll 1)$ we factorize the…

High Energy Physics - Phenomenology · Physics 2018-02-14 Ahmad Idilbi , Chul Kim

Heavy colored scalar particles appear in a variety of new physics (NP) models and could be produced at the Large Hadron Collider (LHC). Knowing the total production cross section is important for searching for these states and establishing…

High Energy Physics - Phenomenology · Physics 2009-07-24 Ahmad Idilbi , Chul Kim , Thomas Mehen

We have previously introduced a hybrid strong/weak coupling model for jet quenching in heavy ion collisions that describes the production and fragmentation of jets at weak coupling, using PYTHIA, and describes the rate at which each parton…

High Energy Physics - Phenomenology · Physics 2016-04-20 Jorge Casalderrey-Solana , Doga Can Gulhan , José Guilherme Milhano , Daniel Pablos , Krishna Rajagopal

We introduce a new 'quantile' analysis strategy to study the modification of jets as they traverse through a droplet of quark-gluon plasma. To date, most jet modification studies have been based on comparing the jet properties measured in…

High Energy Physics - Phenomenology · Physics 2019-09-18 Jasmine Brewer , José Guilherme Milhano , Jesse Thaler

We determine the O(alpha_s^2) corrections to the partonic hemisphere soft function relevant for thrust and jet mass distributions in e+e- annihilation in the dijet limit. In this limit the distributions can be described by a factorization…

High Energy Physics - Phenomenology · Physics 2008-07-09 Andre H. Hoang , Stefan Kluth

Three-jet event-shape distributions can be exploited to investigate the dependence of hadronisation effects on the colour and the geometry of the underlying hard event. We present here the first comparison of data in e+e- annihilation and…

High Energy Physics - Phenomenology · Physics 2007-06-20 Andrea Banfi

To describe the transverse momentum spectrum of heavy color-singlet production, the joint resummation of threshold and transverse momentum logarithms is investigated. We obtain factorization theorems for various kinematic regimes valid to…

High Energy Physics - Phenomenology · Physics 2016-10-21 Gillian Lustermans , Wouter J. Waalewijn , Lisa Zeune

We introduce a new jet algorithm called XCone, for eXclusive Cone, which is based on minimizing the event shape N-jettiness. Because N-jettiness partitions every event into N jet regions and a beam region, XCone is an exclusive jet…

High Energy Physics - Phenomenology · Physics 2016-01-20 Iain W. Stewart , Frank J. Tackmann , Jesse Thaler , Christopher K. Vermilion , Thomas F. Wilkason

In recent years, energy correlators have emerged as a powerful tool for studying jet substructure, with promising applications such as probing the hadronization transition, analyzing the quark-gluon plasma, and improving the precision of…

High Energy Physics - Phenomenology · Physics 2025-01-07 Ankita Budhraja , Hao Chen , Wouter J. Waalewijn

We investigate single-inclusive high-pT jet production in longitudinally polarized pp collisions at RHIC, with particular focus on the algorithm adopted to define the jets. Following and extending earlier work in the literature, we treat…

High Energy Physics - Phenomenology · Physics 2015-06-11 Asmita Mukherjee , Werner Vogelsang