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Title A formalism for extracting track functions from jet measurements
Authors Keith Lee, Ian Moult, Felix Ringer, Wouter Waalewijn
JLAB number JLAB-THY-23-3891
LANL number (None)
Other number DOE/OR/23177-6759
Document Type(s) (Journal Article) 
Associated with EIC: Yes
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)

Compiled for Journal of High Energy Physics
Volume 194
Publication Abstract: The continued success of the jet substructure program will require wide spread use of tracking information to enable more precise measurements of a broader class of ob- servables. The recent reformulation of jet substructure in terms of energy correlators has enabled the incorporation of universal non-perturbative matrix elements, the so called ?track functions?, into jet substructure calculations. These advances make it timely to understand how these these universal non-perturbative functions can be extracted from hadron collider data, which is made complicated by the use jet algorithms. In this pa- per we derive a factorization theorem matching measurements of the track energy fraction in identified jets onto the universal non-perturbative track functions. This requires the introduction of new perturbatively calculable matching coefficients, which we term ?semi- inclusive semi-inclusive track fragmenting jet functions?. We calculate these new functions, and present phenomenological results for the charged energy fraction in jets at the LHC and EIC/HERA at collinear next-to-leading logarithmic accuracy. We show that higher moments of the charged energy fraction directly exhibit non-linear Lorentzian renormal- ization group flows in a physical observable, allowing the study of these flows with collider data. Our factorization theorem enables the extraction of universal track functions from jet measurements, opening the door to their use for a precision jet substructure program.
Experiment Numbers: other
Document: pdf
Accepted Manuscript: JHEP01(2024)194.pdf
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