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UID:pretalx-juliacon-2026-WDZ3AN@pretalx.com
DTSTART;TZID=CET:20260812T100000
DTEND;TZID=CET:20260812T101500
DESCRIPTION:The spectroscopy of exotic hadrons enables probing the dynamics
  of the strong interaction beyond the conventional quark–antiquark and t
 hree–quark picture. Measurements at the LHCb experiment revealed the dou
 bly charmed tetraquark Tcc⁺ and provided new high-precision data relevan
 t for understanding the structure of the X(3872). Interpreting such near-t
 hreshold systems requires accurate modeling of threshold effects\, multi-b
 ody dynamics\, and technically advanced statistical inference.\n\nWe prese
 nt a Julia-based analysis ecosystem developed for studies of these states 
 using LHCb data. The workflow combines established Julia packages for stat
 istical modeling and minimization with specialized tools tailored for hadr
 on spectroscopy. Core functionality relies on packages such as Distributio
 ns.jl\, NumericalDistributions.jl and Minuit2.jl\, extended by domain-spec
 ific probability distributions implemented in DistributionsHEP.jl.\n\nSeve
 ral dedicated physics packages provide modular building blocks for amplitu
 de models and line-shape calculations. These include X3872Flatte.jl\, X387
 2ThreeBodyLineshape.jl\, and xDDPhaseSpace.jl\, implementing threshold lin
 e shapes\, three-body kinematics\, and phase-space constructions relevant 
 for near-threshold charm systems. Complete analyses are developed in separ
 ate private repositories operating on collaboration-internal data and like
 lihood models\; the software is released publicly once the corresponding a
 nalyses are published.\n\nA key component of the workflow is BuildConstruc
 tors.jl\, a framework providing long-awaited granular control over complex
  fitting strategies. It enables structured construction of likelihood fits
  with systematic parameter management\, including controlled fixing and re
 leasing of parameters during iterative block likelihood fits.\n\nTogether 
 these packages support complex spectroscopy analyses while extending the J
 ulia ecosystem with tools for amplitude modeling and likelihood-based infe
 rence. They simplify the development of advanced analysis strategies and m
 ake Julia more accessible for future analyses in experimental particle phy
 sics.
DTSTAMP:20260710T092529Z
LOCATION:Alte Mensa — Audi Max
SUMMARY:Amplitude Analysis of Exotic Multiquark States with Julia in the LH
 Cb Experiment - Mikhail Mikhasenko\, Robert Hentges
URL:https://pretalx.com/juliacon-2026/talk/WDZ3AN/
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