Tony Menzo

Iterative HOMER with uncertainties

Anja Butter, Ayodele Ore, Sofia Palacios Schweitzer +10

We present iHOMER, an iterative version of the HOMER method to extract Lund fragmentation functions from experimental data. Through iterations, we address the information gap betwe…

Towards a data-driven model of hadronization using normalizing flows

Christian Bierlich, Phil Ilten, Tony Menzo +5

We introduce a model of hadronization based on invertible neural networks that faithfully reproduces a simplified version of the Lund string model for meson hadronization. Addition…

hep-ph2022

Modeling hadronization using machine learning

Phil Ilten, Tony Menzo, Ahmed Youssef +1

We present the first steps in the development of a new class of hadronization models utilizing machine learning techniques. We successfully implement, validate, and train a conditi…

Agentic Diagrammatica: Towards Autonomous Symbolic Computation in High Energy Physics

Tony Menzo, Alexander Roman, George T. Fleming +3

We present Diagrammatica, a symbolic computation extension to the HEPTAPOD agentic framework, which enables LLM agents to plan and execute multi-step theoretical calculations. Symb…

Direct Detection of Ultralight Dark Matter via Charged Lepton Flavor Violation

Innes Bigaran, Patrick J. Fox, Yann Gouttenoire +4

We propose a dark matter direct-detection strategy using charged particle decays at accelerator-based experiments. If ultralight $(m_{I ¨} ≪ eV)$ dark matter has a misalignmen…

Unbinned extraction of $I^^{3}$ from $B \to D K$ with normalizing flows

Yuval Grossman, Tony Menzo, Stefan Schacht +2

We introduce an unbinned method for extracting the CKM angle $I^^{3}$ from the decay chain $B^{\pm} \to (D \to K_{S} I ¨ ^{+} I ¨ ^{-}) K^{\pm}$ using normalizing flows (NFs). The NFs, trained on $D…

hep-ph2023

Earth mover's distance as a measure of CP violation

Adam Davis, Tony Menzo, Ahmed Youssef +1

We introduce a new unbinned two sample test statistic sensitive to CP violation utilizing the optimal transport plan associated with the Wasserstein (earth mover's) distance. The e…

physics.ed-ph2026

Vistas: A Visualization Interface for Particle Collision Simulations

Benoit Assi, Christan Bierlich, Rikab Gambhir +7

We introduce Vistas, a tool for visualizing high-energy particle physics collisions simulated by the Pythia Monte-Carlo event generator. Vistas utilizes the browser-based event dis…

New physics in multi-lepton tau decays

Yohei Ema, Patrick J. Fox, Matheus Hostert +4

Dark particles with lepton-flavor-violating couplings to the tau lepton can induce rare neutrinoless $I ¨ $ decays with large final state multiplicities. We study models where transi…

Long-lived Axion-Like Particles from Tau Decays

Yohei Ema, Patrick J. Fox, Matheus Hostert +4

Axion-like particles (ALPs) are well-motivated examples of light, weakly coupled particles in theories beyond the Standard Model. In this work, we study long-lived ALPs coupled exc…

hep-ph2023

New physics in multi-electron muon decays

Matheus Hostert, Tony Menzo, Maxim Pospelov +1

We study the exotic muon decays with five charged tracks in the final state. First, we investigate the Standard Model rate for $I^¼^{+} \to 3 e^{+} 2 e^{-} 2 I^½$ ( $B = 4.0 \times 1 0^{- 10})$ …

Characterizing the hadronization of parton showers using the HOMER method

Benoit Assi, Christian Bierlich, Philip Ilten +6

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…

hep-ph2022

On the implications of positive W mass shift

Reuven Balkin, Eric Madge, Tony Menzo +3

We investigate the phenomenological implications of the recent $W$ mass measurement by the CDF collaboration, which exhibits tension with the standard model (SM) electroweak fit. P…

Post-hoc reweighting of hadron production in the Lund string model

BenoÃ®t Assi, Christan Bierlich, Philip Ilten +6

We present a method for reweighting flavor selection in the Lund string fragmentation model. This is the process of calculating and applying event weights enabling fast and exact v…

Describing Hadronization via Histories and Observables for Monte-Carlo Event Reweighting

Christian Bierlich, Phil Ilten, Tony Menzo +5

We introduce a novel method for extracting a fragmentation model directly from experimental data without requiring an explicit parametric form, called Histories and Observables for…

HDSense: An efficient method for ranking observable sensitivity

BenoÃ®t Assi, Christian Bierlich, Rikab Gambhir +6

Identifying which observables most effectively constrain model parameters can be computationally prohibitive when considering full likelihoods of many correlated observables. This…

HEPTAPOD: Orchestrating High Energy Physics Workflows Towards Autonomous Agency

Tony Menzo, Alexander Roman, Sergei Gleyzer +5

Many theoretical and experimental workflows in high-energy-physics (HEP) stand to benefit from recent advances in transformer-based large language models (LLMs). While early applic…

Rejection Sampling with Autodifferentiation - Case study: Fitting a Hadronization Model

Nick Heller, Phil Ilten, Tony Menzo +5

We present an autodifferentiable rejection sampling algorithm termed Rejection Sampling with Autodifferentiation (RSA). In conjunction with reweighting, we show that RSA can be use…

Effective theory tower for $I^¼ \to e$ conversion

Wick Haxton, Kenneth McElvain, Tony Menzo +2

We present theoretical predictions for $I^¼ \to e$ conversion rates using a tower of effective field theories connecting the UV to nuclear physics scales. The interactions in…

Searching for exotic scalars at fusion reactors

Chaja Baruch, Patrick J. Fitzpatrick, Tony Menzo +3

The energy created in deuterium-tritium fusion reactors originates from a high-intensity neutron flux interacting with the reactor's inner walls. The neutron flux can also be used…

Conservation laws and effective hadronization models

Tony Menzo

Hadronization models based on local string-breaking dynamics are typically Markovian by construction, yet the physical ensemble of final states is shaped by global constraints that…

Muon-induced baryon number violation

Patrick J. Fox, Matheus Hostert, Tony Menzo +2

The search for charged-lepton flavor violation in muon capture on nuclei is a powerful probe of heavy new physics. A smoking gun signal for $I^¼ \to e$ conversion is a monoch…