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DOE OSTI · 2589436

Heavy flavor jet substructure at lepton colliders

Dhani, Prasanna K. [Universitat de València—Consejo Superior de Investigaciones Científicas (Spain)] (ORCID:0000000220726349)·Fedkevych, Oleh [Georgia State University, Atlanta, GA (United States); Stony Brook University, NY (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)] (ORCID:0000000323855995)·Ghira, Andrea [Università di Genova (Italy)] (ORCID:000900020154247X)
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Abstract

We provide a detailed analysis of event-shape observables, namely the energy correlation function and jet angularity, for heavy-flavor jets produced in electron-positron collisions, focusing on quantum chromodynamics (QCD) interactions. Using modern jet substructure techniques, we investigate the dead-cone effect, where QCD radiation is suppressed around a heavy quark within an angle proportional to its mass. Our analysis achieves next-to-leading logarithmic accuracy, combined with partial fixed-order contributions, to improve the description of the transition near the dead-cone threshold. To ensure a comprehensive perspective, we compare our analytical results with predictions from the pythia, herwig, and sherpa Monte Carlo simulations at past and future lepton colliders.

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Dhani, Prasanna K. [Universitat de València—Consejo Superior de Investigaciones Científicas (Spain)] (ORCID:0000000220726349), Fedkevych, Oleh [Georgia State University, Atlanta, GA (United States); Stony Brook University, NY (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)] (ORCID:0000000323855995), Ghira, Andrea [Università di Genova (Italy)] (ORCID:000900020154247X). 2025-09-04. Heavy flavor jet substructure at lepton colliders. https://doi.org/10.1103/516y-k5g2

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