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We calculate the jet shape and the jet cross section in heavy ion collisions using soft-collinear effective theory (SCET) and its extension with Glauber gluon interactions in the medium (SCET$_{\rm G}$). We use the previously developed…

High Energy Physics - Phenomenology · Physics 2016-05-25 Yang-Ting Chien , Ivan Vitev

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

We develop an effective field theory (EFT) framework to perform an analytic calculation for energy correlator observables computed on groomed heavy-quark jets. A soft-drop grooming algorithm is applied to a jet initiated by a massive quark…

High Energy Physics - Phenomenology · Physics 2019-10-02 Christopher Lee , Prashant Shrivastava , Varun Vaidya

We study hadronic jets that are tagged as heavy-flavoured, i.e. they contain either beauty or charm. In particular, we consider heavy-flavour jets that have been groomed with the Soft Drop algorithm. In order to achieve a deeper…

High Energy Physics - Phenomenology · Physics 2024-03-01 Simone Caletti , Andrea Ghira , Simone Marzani

Measurements of jet substructure are key to probing the energy frontier at colliders, and many of them use track-based observables which take advantage of the angular precision of tracking detectors. Theoretical calculations of track-based…

High Energy Physics - Experiment · Physics 2025-07-16 ATLAS Collaboration

If studies of electroweak gauge boson final states at the Large Hadron Collider, for Standard Model physics and beyond, are sensitive to effects of the initial state's transverse momentum distribution, appropriate generalizations of QCD…

High Energy Physics - Phenomenology · Physics 2015-06-19 S. Dooling , F. Hautmann , H. Jung

We present a first-principle computation of the mass distribution of jets which have undergone the grooming procedure known as Soft Drop. This calculation includes the resummation of the large logarithms of the jet mass over its transverse…

High Energy Physics - Phenomenology · Physics 2018-03-14 Simone Marzani , Lais Schunk , Gregory Soyez

In this study, we extend our previous global analysis of nuclear-modified transverse momentum distribution functions (nTMDs) to also consider the nuclear-modified collinear fragmentation function. Our methodology incorporates the global set…

High Energy Physics - Phenomenology · Physics 2023-12-15 Mishary Alrashed , Zhong-Bo Kang , John Terry , Hongxi Xing , Congyue Zhang

The combined measurements of proton's structure functions in deeply inelastic scattering at the HERA collider provide high-precision data capable of constraining parton density functions over a wide range of the kinematic variables. We…

High Energy Physics - Phenomenology · Physics 2015-06-18 F. Hautmann , H. Jung

Jets and their substructure play a central role in many analyses at the Large Hadron Collider (LHC). To improve the precision of measurements, as well as to enable measurement of jet substructure at increasingly small angular scales,…

High Energy Physics - Phenomenology · Physics 2024-02-06 Hao Chen , Max Jaarsma , Yibei Li , Ian Moult , Wouter J. Waalewijn , Hua Xing Zhu

We report a measurement of transverse momentum spectra of jets detected with the ALICE detector in Pb-Pb collisions at $\sNN=2.76$ TeV. Jets are reconstructed from charged particles using the anti-\kt jet algorithm. The transverse momentum…

Nuclear Experiment · Physics 2019-08-13 Marta Verweij

We define and study the properties of generalized beam functions (BFs) and fragmenting jet functions (FJFs), which are fully-unintegrated parton distribution functions (PDFs) and fragmentation functions (FFs) for perturbative k_T. We…

High Energy Physics - Phenomenology · Physics 2015-05-30 Ambar Jain , Massimiliano Procura , Wouter J. Waalewijn

The properties of jets produced in p+p collisions at sqrt(s)=200 GeV are measured using the method of two particle correlations. The trigger particle is a leading particle from a large transverse momentum jet while the associated particle…

High Energy Physics - Experiment · Physics 2008-11-26 PHENIX Collaboration , S. S. Adler

We develop a factorization framework to compute the double differential cross section in soft drop groomed jet mass and groomed jet radius. We describe the effective theories in the large, intermediate, and small groomed jet radius regions…

High Energy Physics - Phenomenology · Physics 2021-04-21 Aditya Pathak , Iain W. Stewart , Varun Vaidya , Lorenzo Zoppi

Explicit applications of factorization theorems for processes at hadron colliders near the hadronic endpoint have largely focused on simple final states with either no jets (e.g., Drell-Yan) or one inclusive jet (e.g., deep inelastic…

High Energy Physics - Phenomenology · Physics 2014-11-20 Christian W. Bauer , Nicholas Daniel Dunn , Andrew Hornig

The jet fragmentation function of inclusive jets with transverse momentum pt above 100 GeV in PbPb collisions has been measured using reconstructed charged particles with pt above 1 GeV in a cone of radius 0.3 around the jet axis. A data…

Nuclear Experiment · Physics 2014-09-03 CMS Collaboration

Jets created in association with a photon can be used as a calibrated probe to study energy loss in the medium created in nuclear collisions. Measurements of the transverse momentum balance between isolated photons and inclusive jets are…

Nuclear Experiment · Physics 2019-01-17 ATLAS Collaboration

We discuss how to search for a possibe signal of the recently observed 750 GeV enhancement in the diphoton channel in the four-jet production. In the present studies we assume that the produced state is pseudoscalar. This fact, when…

High Energy Physics - Phenomenology · Physics 2016-07-18 Rafal Maciula , Antoni Szczurek

Hard-scattered partons ejected from high-energy proton-proton collisions undergo parton shower and hadronization, resulting in collimated collections of particles that are clustered into jets. A substructure observable that highlights the…

High Energy Physics - Experiment · Physics 2025-02-25 The STAR Collaboration

The precise reconstruction of jet transverse momenta in heavy-ion collisions is a challenging task. A major obstacle is the large number of uncorrelated (mainly) low-$p_\mathrm{T}$ particles overlaying the jets. Strong region-to-region…

Nuclear Experiment · Physics 2019-09-05 Rüdiger Haake