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We examine the uncertainty of perturbative QCD factorization for hadron structure functions in deep inelastic scattering at a large value of the Bjorken variable xB. We analyze the target mass correction to the structure functions by using…

高能物理 - 唯象学 · 物理学 2014-11-18 Alberto Accardi , Jian-Wei Qiu

We calculate single parton distributions inside quark and gluon jets within the coherent branching formalism, which resums leading and next-to-leading logarithmic contributions. This formalism is at the basis of the modified leading…

高能物理 - 唯象学 · 物理学 2009-05-12 Sebastian Sapeta , Urs Achim Wiedemann

By performing $N$-body simulations, we investigated fundamental processes of collisions between dust aggregates composed of submicron-sized icy dust monomers. We examined the mass distribution of fragments in the collisional outcomes in a…

地球与行星天体物理 · 物理学 2023-02-22 Yukihiko Hasegawa , Takeru K. Suzuki , Hidekazu Tanaka , Hiroshi Kobayashi , Koji Wada

Jet substructure quantities are measured using jets groomed with the soft-drop grooming procedure in dijet events from 32.9 fb$^{-1}$ of $pp$ collisions collected with the ATLAS detector at $\sqrt{s} = 13$ TeV. These observables are…

高能物理 - 实验 · 物理学 2020-03-25 ATLAS Collaboration

In factorization formulae for cross sections of scattering processes, final-state jets are described by jet functions, which are a crucial ingredient in the resummation of large logarithms. We present an approach to calculate generic…

高能物理 - 唯象学 · 物理学 2020-12-02 Avanish Basdew-Sharma , Franz Herzog , Solange Schrijnder van Velzen , Wouter J. Waalewijn

A jet algorithm based on the k-means clustering procedure is proposed which can be used for the invariant-mass reconstruction of heavy states decaying to hadronic jets. The proposed algorithm was tested by reconstructing E+ E- to ttbar to 6…

高能物理 - 唯象学 · 物理学 2009-01-07 S. Chekanov

We address the modeling dependence of jet taggers built using the method of Mass Unspecific Supervised Tagging, by using two different parton showering and hadronisation schemes. We find that the modeling dependence of the results -…

高能物理 - 唯象学 · 物理学 2022-04-13 J. A. Aguilar-Saavedra

The performance of pre-trained masked diffusion models is often constrained by their sampling procedure, which makes decisions irreversible and struggles in low-step generation regimes. We introduce a novel sampling algorithm that works…

Understanding the role of parton mass and Casimir colour factors in the quantum chromodynamics parton shower represents an important step in characterising the emission properties of heavy quarks. Recent experimental advances in jet…

核实验 · 物理学 2023-11-28 ALICE Collaboration

Studying the substructure of jets has become a powerful tool for event discrimination and for studying QCD. Typically, jet substructure studies rely on Monte Carlo simulation for vetting their usefulness; however, when possible, it is also…

高能物理 - 唯象学 · 物理学 2015-03-20 Andrew J. Larkoski

Some of the most arduous and error-prone aspects of precision resummed calculations are related to the partonic hard process, having nothing to do with the resummation. In particular, interfacing to parton-distribution functions, combining…

高能物理 - 唯象学 · 物理学 2016-09-21 David Farhi , Ilya Feige , Marat Freytsis , Matthew D. Schwartz

The generalized lasso is a natural generalization of the celebrated lasso approach to handle structural regularization problems. Many important methods and applications fall into this framework, including fused lasso, clustered lasso, and…

机器学习 · 统计学 2025-01-07 Jianmin Chen , Kun Chen

We present 3-D MHD and synthetic numerical simulations to follow the evolution of randomly magnetized intra-cluster medium plasma under the effects of powerful, light, hypersonic and bipolar jets. We prescribe the cluster magnetic field…

宇宙学与河外天体物理 · 物理学 2011-11-07 Martín Huarte-Espinosa , Martin Krause , Paul Alexander

New particles beyond the Standard Model might be produced with a very high boost, for instance if they result from the decay of a heavier particle. If the former decay hadronically, then their signature is a single massive fat jet which is…

高能物理 - 唯象学 · 物理学 2018-01-17 J. A. Aguilar-Saavedra , Jack H. Collins , Rashmish K. Mishra

Exclusive processes in hard electroproduction is one of the best place for understanding the factorization properties of QCD. The HERA experiment recently provided precise data for rho electroproduction, including all spin density matrix…

高能物理 - 唯象学 · 物理学 2014-11-20 I. V. Anikin , D. Yu. Ivanov , B. Pire , L. Szymanowski , S. Wallon

Jets, as collections of multi-scale objects, allow for insight into perturbative (high-momentum) processes, but gaining an understanding of the non-perturbative structure within jets such as hadronization effects and the underlying event…

高能物理 - 唯象学 · 物理学 2024-02-19 Isaac Mooney

We initiate the study of the time substructure of jets, motivated by the fact that the next generation of detectors at particle colliders will resolve the time scale over which jet constituents arrive. This effect is directly related to…

高能物理 - 唯象学 · 物理学 2021-12-22 Matthew D. Klimek

Jet vetoes play an important role at the LHC in the search for the Higgs and ultimately in precise measurements of its properties. Many Higgs analyses divide the cross section into exclusive jet bins to maximize the sensitivity in different…

高能物理 - 唯象学 · 物理学 2014-03-26 Frank J. Tackmann , Jonathan R. Walsh , Saba Zuberi

In calculations of (semi-) inclusive events within perturbative Quantum Chromodynamics, large logarithmic corrections arise from certain kinematic regions of interest which need to be resummed. When resumming soft gluon effects one…

高能物理 - 唯象学 · 物理学 2007-05-23 Carola F. Berger

The resummation for the event-shape variable jet broadening is extended to next-to-next-to-leading logarithmic accuracy by computing the relevant jet and soft functions at one-loop order and the collinear anomaly to two-loop accuracy. The…

高能物理 - 唯象学 · 物理学 2015-06-11 Thomas Becher , Guido Bell
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