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We study a novel property of large rapidity-gap events in deep inelastic scattering at HERA: splitting the pomeron into two jets in the photon-pomeron fusion reaction $\gamma^{*}\Pom \rightarrow q\bar{q}$. It gives rise to the diffraction…

High Energy Physics - Phenomenology · Physics 2009-10-28 N. N. Nikolaev , B. G. Zakharov

We reconsider the associated $Z$ boson and charm or beauty jet production at the LHC with paying special attention to the formation dynamics of heavy jets. Two different approaches are studied: first one, where heavy quarks are produced in…

High Energy Physics - Phenomenology · Physics 2022-03-09 S. P. Baranov , A. Bermudez Martinez , H. Jung , A. V. Lipatov , M. A. Malyshev , S. Taheri Monfared

Different methods to reconstruct the quark-gluon fusion product and current jet are tried in deep-inelastic e-p scattering events with instanton as background generated by QCDINS Monte Carlo code. A comparison of these methods are performed…

High Energy Physics - Phenomenology · Physics 2007-05-23 Xu Mingmei , Liu Lianshou

A study of the dynamical fluctuation property of jets is carried out using Monte Carlo method. The results suggest that, unlike the average properties of the hadronic system inside jets, the anisotropy of dynamical fluctuations in these…

High Energy Physics - Phenomenology · Physics 2009-10-31 Liu Lianshou , Chen Gang , Fu Jinghua

This paper describes a simple yet novel system for generating a highly viscous microjet. The jet is produced inside a wettable thin tube partially submerged in a liquid. The gas-liquid interface inside the tube, which is initially concave,…

Fluid Dynamics · Physics 2018-02-07 Hajime Onuki , Yuto Oi , Yoshiyuki Tagawa

Medium modification of \gamma-tagged jets in high-energy heavy-ion collisions is investigated within a Linearized Boltzmann Transport model for jet propagation that includes both elastic parton scattering and induced gluon emission.…

High Energy Physics - Phenomenology · Physics 2013-08-20 Xin-Nian Wang , Yan Zhu

In this talk the newly developped Monte-Carlo event generator {\tt APACIC++} suitable to describe multijet-events in high-energetic electron-positron annihilations is presented. A new ansatz to match the corresponding matrix elements for…

High Energy Physics - Phenomenology · Physics 2014-11-17 F. Krauss , R. Kuhn , G. Soff

Highly energetic particles in the medium of a quark gluon plasma undergo processes of coherent medium induced radiation and scatterings off medium particles. We solved the evolution equations for particle fragmentation functions that…

High Energy Physics - Phenomenology · Physics 2021-11-17 E. Blanco , K. Kutak , M. Rohrmoser , W. Płaczek , R. Straka

Recent developments in QCD phenomenology have spurred on several improved approaches to Monte Carlo event generation, relative to the post--LEP state of the art. In this brief review, the emphasis is placed on approaches for 1) consistently…

High Energy Physics - Phenomenology · Physics 2009-11-11 Peter Z. Skands

Based on a pQCD inspired dynamical model of jet-medium interactions, Jewel, we have studied possible modifications to inclusive jet yields and a set of jet shape observables, namely, the fragmentation functions and radial momentum…

High Energy Physics - Phenomenology · Physics 2019-07-25 Rathijit Biswas , Subikash Choudhury , Sidharth Kumar Prasad , Supriya Das

We apply Continuous Normalizing Flows trained with the Flow Matching method to the problem of phase-space sampling in Monte Carlo event generation for high-energy collider physics. Focusing on lepton-pair and top quark pair production with…

High Energy Physics - Phenomenology · Physics 2026-04-07 Enrico Bothmann , Timo Janßen , Max Knobbe , Bernhard Schmitzer , Fabian Sinz

We propose changes to the colour reconnection model in the Monte Carlo event generator Herwig in order to remove the quasi diffractive events from the soft multiple parton interactions. We then implement explicitly soft diffraction and show…

High Energy Physics - Phenomenology · Physics 2016-02-16 Stefan Gieseke , Frasher Loshaj , Miroslav Myska

The theoretical treatment of jet quenching lacks a full description of the interplay between vacuum-like emissions, usually formulated in momentum space, and medium induced ones that demand an interface with a space-time picture of the…

High Energy Physics - Phenomenology · Physics 2024-02-16 Carlota Andrés , Liliana Apolinário , Néstor Armesto , André Cordeiro , Fabio Dominguez , José Guilherme Milhano

Programs that calculate observables in quantum chromodynamics at next-to-leading order typically suffer from the problem that, when considered as event generators, the events generated consist of partons rather than hadrons and just a few…

High Energy Physics - Phenomenology · Physics 2009-04-13 Michael Kramer , Davison E. Soper

We calculate the leading corrections to jet momentum broadening and medium-induced branching that arise from the velocity of the moving medium at first order in opacity. These results advance our knowledge of jet quenching and demonstrate…

High Energy Physics - Phenomenology · Physics 2022-01-24 Andrey V. Sadofyev , Matthew D. Sievert , Ivan Vitev

We propose a new implementation of medium effects in jet structures in which a modification of the splitting function is included at every step in the typical final state parton shower. Although the main application of this new formalism…

High Energy Physics - Phenomenology · Physics 2009-11-13 Carlos A. Salgado

The mass of heavy quarks, such as charm and bottom, plays an important role in the formation of parton showers. This effect is apparently not well understood when parton showers evolve in a strongly interacting quark-gluon plasma. We…

High Energy Physics - Phenomenology · Physics 2019-05-07 Hai Tao Li , Ivan Vitev

We present precision results for distributions in global event shapes that can be measured at hadron colliders within experimental limitations. These predictions are obtained by combining exact next-to-leading order (NLO) with the all-order…

High Energy Physics - Phenomenology · Physics 2011-01-04 Andrea Banfi

Event generators play an important role in all physics programs at the Large Hadron Collider and beyond. Dedicated efforts are required to tune the parameters of event generators to accurately describe data. There are many tuning methods…

High Energy Physics - Phenomenology · Physics 2023-10-12 Jaffae Schroff , Xiangyang Ju

We describe a Monte Carlo event generator for the simulation of QCD-instanton induced processes in deep-inelastic scattering (HERA). The QCDINS package is designed as an ``add-on'' hard process generator interfaced to the general hadronic…

High Energy Physics - Phenomenology · Physics 2009-10-31 A. Ringwald , F. Schrempp