Conveners
Heavy Ions: 1
- Carlota Andres (Ecole Polytechnique, CPHT)
Heavy Ions: 2
- Philip Coleman Harris (Massachusetts Inst. of Technology (US))
In this talk, we discuss energy correlators within the context of beauty and charm quark jets to illuminate the effects of the intrinsic mass of the elementary particles of QCD. We extend existing factorization theorems to include the mass of heavy quarks and calculate heavy quark jet functions in order to carry out theoretical calculations to next-to-leading logarithmic accuracy. Using this...
The production of jets at hadron provides stringent tests of perturbative QCD. We present the latest measurements using proton-proton collision data collected by the ATLAS experiment at sqrt(s)=13 TeV. We will discuss the measurement of new event-shape jet observables defined in terms of reference geometries with cylindrical and circular symmetries using the energy mover???s distance. The...
Over the last decades, the theoretical picture of how hadronic jets interact with nuclear matter has been extended to account for the medium’s finite longitudinal length and expansion. However, only recently a first-principle approach has been developed that allows to couple the jet evolution to the medium flow and anisotropic structure in the dilute limit. In this talk, we will show how to...
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During heavy-ion collisions, a new phase of matter, the quark-gluon plasma, is believed to have been created. The dense and hot matter interacts with high energy parton leading to the jet quenching effect, which redistributes the energy inside high energy jets. Therefore jets are an important probe to understand the heavy-ion collisions. There have been a lot of progress in recent years in...
The energy-flow-operator (EFO) provides an idealised field-theoretic definition of a calorimenter. Recently, the angular correlations between EFOs on the celestial sphere have seen a great deal of interest as a tool for jet substructure. Due to the causal structure of EFO correlators, the angular size of the correlations can be viewed as a time parameter: early time perturbative correlations...
Measuring the jet substructure in heavy-ion collisions provides exciting new opportunities to study detailed aspects of the dynamics of jet quenching in the hot and dense QCD medium created in these collisions. In this talk, we present new ATLAS measurements of jet substructure performed using various jet (de)clustering and grooming techniques. Measurements of inclusive jet suppression (RAA)...
We revisit the picture of jets propagating in the quark-gluon plasma. In addition to vacuum radiation, partons scatter on the medium constituents resulting in induced emissions. We achieve full analytical control of the relevant scales and map out the dominant physical processes in the full phase space for the first time. This covers the whole phase space from early to late times, and from...
