477 citations · 3.3k across the 48 of their papers we have counts for
42 papers · 1 filter
Quantifying EFT Uncertainties in LHC Searches
Spencer Chang, Markus A. Luty, Teng Ma +2
Effective Field Theory (EFT) is a general framework to parametrize the low-energy approximation to a UV model that is widely used in model-independent searches for new physics. The…
Primary Observables for Top Quark Collider Signals
Layne Bradshaw, Spencer Chang
At the HL-LHC and future high energy colliders, a sample of a billion top quarks will be produced, allowing precision searches for new physics in top quark decay and production. To…
Primary Observables for Indirect Searches at Colliders
Spencer Chang, Miranda Chen, Da Liu +1
We consider the complete set of observables for collider searches for indirect effects of new heavy physics. They consist of invariant interacti…
Snowmass 2021 White Paper: Higgs Coupling Sensitivities and Model-Independent Bounds on the Scale of New Physics
Fayez Abu-Ajamieh, Spencer Chang, Miranda Chen +2
In this Snowmass white paper, we describe how unitarity bounds can convert sensitivities for Higgs couplings at future colliders into sensitivities to the scale of new physics. Thi…
Creating Simple, Interpretable Anomaly Detectors for New Physics in Jet Substructure
Layne Bradshaw, Spencer Chang, Bryan Ostdiek
Anomaly detection with convolutional autoencoders is a popular method to search for new physics in a model-agnostic manner. These techniques are powerful, but they are still a "bla…
Higgs Coupling Measurements and the Scale of New Physics
Fayez Abu-Ajamieh, Spencer Chang, Miranda Chen +1
A primary goal of present and future colliders is measuring the Higgs couplings to Standard Model (SM) particles. Any observed deviation from the SM predictions for these couplings…
Distinguishing Signals at Hadron Colliders Using Neural Networks
Spencer Chang, Ting-Kuo Chen, Cheng-Wei Chiang
We investigate a neural network-based hypothesis test to distinguish different and charged scalar resonances through the $\ell+\require{cancel}\cancel{E}_T$ channel at hadron…
The Higgs Trilinear Coupling and the Scale of New Physics
Spencer Chang, Markus A. Luty
We consider modifications of the Higgs potential due to new physics at high energy scales. These upset delicate cancellations predicted by the Standard Model for processes involvin…
What is the Machine Learning?
Spencer Chang, Timothy Cohen, Bryan Ostdiek
Applications of machine learning tools to problems of physical interest are often criticized for producing sensitivity at the expense of transparency. To address this concern, we e…
Don't be left in the dark: Improving LHC searches for dark photons using lepton-jet substructure
G. Barello, Spencer Chang, Christopher A. Newby +1
Collider signals of dark photons are an exciting probe for new gauge forces and are characterized by events with boosted lepton jets. Existing techniques are efficient in searching…
A Simple Gauge Theory Explanation of the Diphoton Excess
Spencer Chang
The recent ATLAS and CMS diphoton resonance excesses are explored in a simple gauge theory extension of the Standard Model where the resonance is the Higgs boson of the $U(1…
Correlated Signals at the Energy and Intensity Frontiers from Nonabelian Kinetic Mixing
G. Barello, Spencer Chang, Christopher A. Newby
We show that when a dark abelian gauge sector and SU kinetically mix it necessarily generates a relation between the kinetic mixing strength and the mass of the mediating…
Phenomenology of Induced Electroweak Symmetry Breaking
Spencer Chang, Jamison Galloway, Markus Luty +2
We study the phenomenology of models of electroweak symmetry breaking where the Higgs potential is dominated by a positive quadratic term destabilized by a tadpole arising from the…
A Model Independent Approach to Inelastic Dark Matter Scattering
G. Barello, Spencer Chang, Christopher A. Newby
We present a model independent analysis of inelastic dark matter transitions at direct detection experiments by modifying the elastic methodology of Fitzpatrick, et al. By analyzin…
Leptophilic Effective WIMPs
Spencer Chang, Ralph Edezhath, Jeffrey Hutchinson +1
Effective WIMP models are minimal extensions of the standard model that explain the relic density of dark matter by the ``WIMP miracle.'' In this paper we consider the phenomenolog…
Effective WIMPs
Spencer Chang, Ralph Edezhath, Jeffrey Hutchinson +1
The 'WIMP miracle' for the relic abundance of thermal dark matter motivates weak scale dark matter with renormalizable couplings to standard model particles. We study minimal model…
Discovering Nonstandard Higgs bosons in the H -> ZA Channel Decay to Multileptons
Spencer Chang, Arjun Menon
In this article we consider the possibility of observing nonstandard Higgs bosons in the H -> Z A -> Z tau+ tau- channel. We present three benchmark scenarios in the NMSSM where H…
Revisiting Theories with Enhanced Higgs Couplings to Weak Gauge Bosons
Spencer Chang, Christopher A. Newby, Nirmal Raj +1
Based on recent LHC Higgs analyses and in anticipation of future results we revisit theories where Higgs bosons can couple to weak gauge bosons with enhanced strength relative to t…
Early Higgs Hints for Non-Minimal Supersymmetry
Aleksandr Azatov, Spencer Chang, Nathaniel Craig +1
We discuss the role that Higgs coupling measurements can play in differentiating supersymmetric extensions of the Standard Model. Fitting current LHC data to the Higgs couplings, w…
Statistical Tests of Noise and Harmony in Dark Matter Modulation Signals
Spencer Chang, Josef Pradler, Itay Yavin
The aim of the current work is a detailed time-series analysis of the data from Dark Matter direct detection experiments as well as related datasets. We examine recent claims that…
Early Higgs Boson Discovery in Non-minimal Higgs Sectors
Spencer Chang, Jared A. Evans, Markus A. Luty
Particle physics models with more than one Higgs boson occur in many frameworks for physics beyond the standard model, including supersymmetry, technicolor, composite Higgs, and "l…
Charge Asymmetric Cosmic Ray Signals From Dark Matter Decay
Spencer Chang, Lisa Goodenough
The PAMELA and Fermi measurements of the cosmic-ray electron and positron spectra have generated much interest over the past two years, because they are consistent with a significa…
Measuring Top Squark Interactions With The Standard Model Through Associated Production
Spencer Chang, Can Kilic, Takemichi Okui
A new particle's interactions can be measured at colliders, by observing its associated production with Standard Model particles. We focus on the case of a collider-stable right-ha…
Simplified Models for LHC New Physics Searches
Daniele Alves, Nima Arkani-Hamed, Sanjay Arora +92
This document proposes a collection of simplified models relevant to the design of new-physics searches at the LHC and the characterization of their results. Both ATLAS and CMS hav…