QCD Seminars

Jet substructure at the LHC with energy correlators

by Bianka Meçaj (Yale University)

zoom (CERN)




Many New Physics searches and QCD precision measurements at particle colliders involve the study of jet substructure for final state hadrons. While traditionally the state of the art for studying jets at particle colliders have been event shape observables, recently it has been better understood that measuring correlation functions of energy flow operators inside a jet can be a very powerful tool for phenomenology, which naturally stems from first principles of quantum field theory. In this talk I will present a bridge between the huge theoretical progress made to understand the energy correlators from the field theory perspective and their practical implementation into the real world of hadron colliders. I will show a factorization formula we have derived using soft-collinear effective theory (SCET), that together with the fragmenting jet formalism, makes it possible to study such energy correlators inside a jet in the complicated LHC environment. I will also show how extending such a factorization theorem to heavy quark jets presents new opportunities to observe intrinsic mass effects of elementary particles in QCD. I will show results for the scaling behavior of the two point energy correlators at NLL and multipoint projected correlators at NLL for both the massless and massive case. In addition I will show a comparison of our results with the CMS open data.

Based on 2205.03414 and 2210.09311

QCD seminars
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Elena Gianolio
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Alexander Yohei Huss, Michelangelo Mangano, Samuel Abreu, Ben Page, Pier Francesco Monni, Silvia Ferrario Ravasio, Pascal Pignereau
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