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A measurement of the substructure of bottom quark jets (b jets) in proton-proton (pp) collisions is presented. The measurement uses data collected in pp collisions at $\sqrt{s}$ = 5.02 TeV, with a low number of simultaneous interactions per…

High Energy Physics - Experiment · Physics 2026-04-28 CMS Collaboration

One of the most active areas of investigation in relativistic heavy-ion collisions is the study of the jet quenching phenomenon whereby hard partons lose their energy as they traverse the hot, dense matter created in such collisions. Strong…

Nuclear Experiment · Physics 2019-08-14 Matthew Nguyen

We discuss the process of colour-singlet parton-parton scattering, which in hadron-hadron collision can lead to production of jet events, where a rapidity gap between the jets is present. The dynamics of the process is calculated within LL…

High Energy Physics - Phenomenology · Physics 2017-11-08 Rafał Staszewski , Izabela Babiarz , Antoni Szczurek

Jet flavor tagging is of utmost importance for unlocking the full physics potential of any future collider experiment. The performance of any jet flavor identification algorithm depends both on its underlying architecture and on the…

Instrumentation and Detectors · Physics 2025-01-29 Dimitrios Ntounis , Loukas Gouskos , Caterina Vernieri

The fragmentation of a light parton i to a jet containing a light energetic hadron h, where the momentum fraction of this hadron as well as the invariant mass of the jet is measured, is described by "fragmenting jet functions". We calculate…

High Energy Physics - Phenomenology · Physics 2011-07-19 Ambar Jain , Massimiliano Procura , Wouter J. Waalewijn

The physics of astrophysical jets can be divided into three regimes: (i) engine and launch (ii) propagation and collimation, (iii) dissipation and particle acceleration. Since astrophysical jets comprise a huge range of scales and…

High Energy Astrophysical Phenomena · Physics 2022-07-27 Eric G. Blackman , Sergey V. Lebedev

Jets in hadron collisions are very complicated with a long learning curve replete with errors. In relativistic heavy ion (RHI) collisions, it is likely that jets will be much more complicated with an even longer and more difficult learning…

Nuclear Experiment · Physics 2009-11-05 M. J. Tannenbaum

Medium modification of $\gamma$-tagged jets in high-energy heavy-ion collisions is investigated within a linearized Boltzmann transport model which includes both elastic parton scattering and induced gluon emission. In Pb+Pb collisions at…

High Energy Physics - Phenomenology · Physics 2015-10-28 Xin-Nian Wang , Yan Zhu

A fundamental characteristic of hadron colliders is the abundant production of jets, which then are studied to learn about hard QCD, the proton structure, or nonperturbative effects. In the following the latest results and developments from…

High Energy Physics - Experiment · Physics 2013-05-28 Klaus Rabbertz

We study the transverse momentum distribution of hadrons within jets, where the transverse momentum is defined with respect to the standard jet axis. We consider the case where the jet substructure measurement is performed for an inclusive…

High Energy Physics - Phenomenology · Physics 2017-11-16 Zhong-Bo Kang , Xiaohui Liu , Felix Ringer , Hongxi Xing

I review the status of next-to-leading-order calculations for hadronic final states in deeply-inelastic lepton--nucleon scattering. In more detail, I focus on calculations of (2+1)-jet-type cross sections, describe recent progress in…

High Energy Physics - Phenomenology · Physics 2008-11-26 Dirk Graudenz

As most target final states for searches and measurements at the Large Hadron Collider have a particular quark/gluon composition, tools for distinguishing quark- from gluon-initiated jets can be very powerful. In addition to the difficulty…

High Energy Physics - Phenomenology · Physics 2019-04-16 Samuel Bright-Thonney , Benjamin Nachman

We discuss non-perturbative QCD contributions to jet observables, computing their dependence on the jet radius R, and on the colour and transverse momentum of the parton initiating the jet. We show, using analytic QCD models of power…

High Energy Physics - Phenomenology · Physics 2009-04-30 Mrinal Dasgupta , Lorenzo Magnea , Gavin P. Salam

Recent LHC results indicate a suppression of jet fragmentation functions in Pb-Pb collisions at intermediate values of $\xi=\ln(1/z)$. This seems to contradict the picture of energy loss based on the induced QCD radiation that is expected…

High Energy Physics - Phenomenology · Physics 2015-06-12 Dmitri E. Kharzeev , Frasher Loshaj

Direct photons associated with jets provide a direct measurement of the effects of energy loss on the fragmentation of the parton as it propagates through the medium. Perturbative QCD calculations describe the direct photon cross section…

Nuclear Experiment · Physics 2019-08-13 Ali Hanks

A next-to-leading order (NLO) analysis of hadron-jet momentum correlations in p-p collisions at the LHC is carried out. We show that the inclusive charged hadron momentum distributions inside jets is a very sensitive observable which allows…

High Energy Physics - Phenomenology · Physics 2015-06-18 Francois Arleo , Michel Fontannaz , Jean-Philippe Guillet , Chi Linh Nguyen

Recent CDF results on inclusive momentum distributions and multiplicities of particles in restricted cones around jets are compared to predictions using the Modified Leading Log Approximation. We found that MLLA gives a very reasonable…

High Energy Physics - Experiment · Physics 2007-05-23 A. Safonov , for CDF Collaboration

The physics of hadron-hadron collisions is very complex involving both perturbative and non perturbative QCD. It is imperative to study p-p collisions in detail to provide a variety of measurements against which the theoretical calculations…

Nuclear Experiment · Physics 2019-08-14 Helen Caines

Jet shape measurements are strongly suggested to explore the microscopic evolution mechanism of parton-medium interaction in ultra-relativistic heavy-ion collisions. In this paper, jet shape modifications are quantified by fragmentation…

High Energy Physics - Phenomenology · Physics 2019-05-22 Renzhuo Wan , Lei Ding , Xi Gui , Fan Yang , Shuang Li , Daicui Zhou

I will present the latest results on particle identified spectra and two particle correlations at high transverse momentum measured with the STAR detector at RHIC. I will compare those measurements with the projected capabilities for the…

Nuclear Experiment · Physics 2007-05-23 R. Bellwied