TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.19.5.125
TI  - Characterizing the hadronization of parton showers using the HOMER method
PY  - 2025/11/11
UR  - https://www.scipost.org/SciPostPhys.19.5.125
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 19
IS  - 5
SP  - 125
A1  - Assi, Benoît
AU  - Bierlich, Christian
AU  - Ilten, Philip
AU  - Menzo, Tony
AU  - Mrenna, Stephen
AU  - Szewc, Manuel
AU  - Wilkinson, Michael K.
AU  - Youssef, Ahmed
AU  - Zupan, Jure
AB  - We update the HOMER method, a technique to solve a restricted version of the inverse problem of hadronization – extracting the Lund string fragmentation function $f(z)$ from data using only observable information. Here, we demonstrate its utility by extracting $f(z)$ from synthetic Pythia simulations using high-level observables constructed on an event-by-event basis, such as multiplicities and shape variables. Four cases of increasing complexity are considered, corresponding to $e^+e^-$ collisions at a center-of-mass energy of $90≥v$ producing either a string stretched between a $q$ and $\bar{q}$ containing no gluons; the same string containing one gluon $g$ with fixed kinematics; the same but the gluon has varying kinematics; and the most realistic case, strings with an unrestricted number of gluons that is the end-result of a parton shower. We demonstrate the extraction of $f(z)$ in each case, with the result of only a relatively modest degradation in performance of the HOMER method with the increased complexity of the string system.
ER  -

@Article{10.21468/SciPostPhys.19.5.125,
	title={{Characterizing the hadronization of parton showers using the HOMER method}},
	author={Benoît Assi and Christian Bierlich and Philip Ilten and Tony Menzo and Stephen Mrenna and Manuel Szewc and Michael K. Wilkinson and Ahmed Youssef and Jure Zupan},
	journal={SciPost Phys.},
	volume={19},
	pages={125},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.19.5.125},
	url={https://scipost.org/10.21468/SciPostPhys.19.5.125},
}