Joint INFN-UNIMI-UNIMIB Pheno Seminars
The dead cone: from pp to heavy-ion collisions
by
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Europe/Zurich
U2-05 (University of Milan Bicocca)
U2-05
University of Milan Bicocca
Piazza della Scienza 3, 20126 Milano
Description
In this talk, we will discuss the possibility of using the dead cone of heavy quarks as a region of the Lund plane where medium-induced gluon radiation can be isolated and characterised. We propose to use jet grooming techniques to identify a particular splitting in the jet tree that is both perturbative and sensitive to the dead-cone effect.
In particular, we introduce a new jet substructure groomer, dubbed Latekt, that selects the most collinear splitting in a QCD jet above a certain transverse momentum cutoff. Our observable is then defined as the angular distribution of the splitting tagged by Latekt. After discussing the logarithmic resummation structure of this new jet substructure observable, we demonstrate that medium-induced emissions lead to an enhancement of collinear emissions below the dead cone angle for b-initiated jets. Numerically, we demonstrate an excellent resilience of Latekt against uncorrelated thermal background, thus confirming this observable as a potential candidate to unveil medium dynamics around the dead cone regime.
In particular, we introduce a new jet substructure groomer, dubbed Latekt, that selects the most collinear splitting in a QCD jet above a certain transverse momentum cutoff. Our observable is then defined as the angular distribution of the splitting tagged by Latekt. After discussing the logarithmic resummation structure of this new jet substructure observable, we demonstrate that medium-induced emissions lead to an enhancement of collinear emissions below the dead cone angle for b-initiated jets. Numerically, we demonstrate an excellent resilience of Latekt against uncorrelated thermal background, thus confirming this observable as a potential candidate to unveil medium dynamics around the dead cone regime.