Seminario di Fenomenologia –

Improved understanding of quantum chromodynamics (QCD) is crucial for advanced precision in LHC data analysis: nearly all LHC collisions used in physics analysis contain jets of hadronic radiation produced by QCD. Jets are reconstructed using signals from the ATLAS inner tracking detector and calorimeters, and calibrated using in situ techniques. Differential cross-section measurements of jets and jet substructure are multi-faceted physics analyses that enable the testing of new theoretical predictions including resummed analytical predictions and higher-accuracy parton shower Monte Carlos. In this seminar, I will review the prospects for extractions of Standard Model parameters from jet substructure, and I will present new measurements of novel event shape observables performed by ATLAS that are constructed using interdisciplinary data-science techniques.

Per connettersi a zoom:

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

We study holographic correlators in 2d with states whose dimensions scale with the central charge. In the 3d bulk, these heavy states create smooth horizonless solutions of supergravity that reduce to black holes in a certain limit. By solving for quadratic perturbations around these backgrounds we compute heavy-heavy-light-light four point functions at strong coupling, and study their behavior as the geometry approaches that of a black hole. We show that in this limit the spectrum of the theory becomes effectively continuous, and the correlator in momentum space develops a branch cut. The discontinuity along the cut has poles at the quasinormal frequencies of the black hole, similarly to what happens for resonances in quantum mechanics.

Per connettersi a zoom:

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

We study holographic correlators in 2d with states whose dimensions scale with the central charge. In the 3d bulk, these heavy states create smooth horizonless solutions of supergravity that reduce to black holes in a certain limit. By solving for quadratic perturbations around these backgrounds we compute heavy-heavy-light-light four point functions at strong coupling, and study their behavior as the geometry approaches that of a black hole. We show that in this limit the spectrum of the theory becomes effectively continuous, and the correlator in momentum space develops a branch cut. The discontinuity along the cut has poles at the quasinormal frequencies of the black hole, similarly to what happens for resonances in quantum mechanics.

Per connettersi a zoom:

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

We study holographic correlators in 2d with states whose dimensions scale with the central charge. In the 3d bulk, these heavy states create smooth horizonless solutions of supergravity that reduce to black holes in a certain limit. By solving for quadratic perturbations around these backgrounds we compute heavy-heavy-light-light four point functions at strong coupling, and study their behavior as the geometry approaches that of a black hole. We show that in this limit the spectrum of the theory becomes effectively continuous, and the correlator in momentum space develops a branch cut. The discontinuity along the cut has poles at the quasinormal frequencies of the black hole, similarly to what happens for resonances in quantum mechanics.

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271

Seminario di Fisica Teorica INFN/DIFI

Topic: Theory and Pheno seminars

https://infn-it.zoom.us/j/8573185271

Meeting ID: 857 318 5271