Publications (115)
The International Linear Collider: Report to Snowmass 2021
Alexander Aryshev, Ties Behnke, Mikael Berggren +508
The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in the 2030s. The ILC addresses key questions for our…
The Weak Scale from Weak Gravity
Nathaniel Craig, Isabel Garcia Garcia, Seth Koren
We explore the prospects for bounding the weak scale using the weak gravity conjecture (WGC), addressing the hierarchy problem by violating the expectations of effective field theo…
On-Shell Covariance of Quantum Field Theory Amplitudes
Timothy Cohen, Nathaniel Craig, Xiaochuan Lu +1
Scattering amplitudes in quantum field theory are independent of the field parameterization, which has a natural geometric interpretation as a form of `coordinate invariance.' Ampl…
Mini-Split
Asimina Arvanitaki, Nathaniel Craig, Savas Dimopoulos +1
The lack of evidence for new physics beyond the standard model at the LHC points to a paucity of new particles near the weak scale. This suggests that the weak scale is tuned and t…
Fermi Geometry of the Higgs Sector
Nathaniel Craig, I-Kwan Lee, Yu-Tse Lee
We develop the field space geometry of scalar-fermion effective field theories as a vector bundle supermanifold. We further establish a Fermi normal coordinate system on the bundle…
Muon Collider Physics Summary
Chiara Aimè, Aram Apyan, Mohammed Attia Mahmoud +122
The perspective of designing muon colliders with high energy and luminosity, which is being investigated by the International Muon Collider Collaboration, has triggered a growing i…
Strategy for Understanding the Higgs Physics: The Cool Copper Collider
Sridhara Dasu, Emilio A. Nanni, Michael E. Peskin +26
A program to build a lepton-collider Higgs factory, to precisely measure the couplings of the Higgs boson to other particles, followed by a higher energy run to establish the Higgs…
Exclusive Signals of an Extended Higgs Sector
Nathaniel Craig, Scott Thomas
Expectations for the magnitude of Higgs boson signals in standard Higgs search channels at the LHC relative to Standard Model (SM) expectations are investigated within the framewor…
Supergroup Symmetries and the Hierarchy Problem
Nathaniel Craig, Emanuele Gendy, Jessica N. Howard
We show that the mass of a scalar field transforming in the fundamental of an supergroup internal symmetry is protected against one-loop corrections from quartic, gauge…
Snowmass Theory Frontier: Effective Field Theory
Matthew Baumgart, Fady Bishara, Tomas Brauner +34
We summarize recent progress in the development, application, and understanding of effective field theories and highlight promising directions for future research. This Report is p…
Magic Zeroes and Hidden Symmetries
Nathaniel Craig, Isabel Garcia Garcia, Arkady Vainshtein +1
Selection rules arising from accidental or broken symmetries may be sufficiently obscure that their agency is hidden, leading to the appearance of "magic zeroes" -- quantities that…
Non-Decoupling New Particles
Ian Banta, Timothy Cohen, Nathaniel Craig +2
We initiate the study of a new class of beyond the Standard Model states that we call "Loryons." They have the defining characteristic of being non-decoupling, in the sense that th…
Messengers from the Early Universe: Cosmic Neutrinos and Other Light Relics
Daniel Green, Mustafa A. Amin, Joel Meyers +136
The hot dense environment of the early universe is known to have produced large numbers of baryons, photons, and neutrinos. These extreme conditions may have also produced other lo…
Multi-Lepton Signals of the Higgs Boson
Emmanuel Contreras-Campana, Nathaniel Craig, Richard Gray +4
The possibility of searching for the Higgs boson in channels with multiple non-resonant leptons is evaluated in light of recent advances in multi-lepton search techniques at the LH…
(De)Constructing a Natural and Flavorful Supersymmetric Standard Model
Nathaniel Craig, Daniel Green, Andrey Katz
Using the framework of deconstruction, we construct simple, weakly-coupled supersymmetric models that explain the Standard Model flavor hierarchy and produce a flavorful soft spect…
The Goldstini Variations
Nathaniel Craig, John March-Russell, Matthew McCullough
We study the 'goldstini' scenario of Cheung, Nomura, and Thaler, in which multiple independent supersymmetry (SUSY) breaking sectors lead to multiple would-be goldstinos, changing…
The Higgs Portal Above Threshold
Nathaniel Craig, Hou Keong Lou, Matthew McCullough +1
The discovery of the Higgs boson opens the door to new physics interacting via the Higgs Portal, including motivated scenarios relating to baryogenesis, dark matter, and electrowea…
Naturalness in the Dark at the LHC
Nathaniel Craig, Andrey Katz, Matt Strassler +1
We revisit the Twin Higgs scenario as a "dark" solution to the little hierarchy problem, identify the structure of a minimal model and its viable parameter space, and analyze its c…
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…
An Effective Cosmological Collider
Nathaniel Craig, Soubhik Kumar, Amara McCune
Effective field theories (EFTs) of heavy particles coupled to the inflaton are rife with operator redundancies, frequently obscured by sensitivity to both boundary terms and field…
Discrete Gauge Symmetries and the Weak Gravity Conjecture
Nathaniel Craig, Isabel Garcia Garcia, Seth Koren
In theories with discrete Abelian gauge groups, requiring that black holes be able to lose their charge as they evaporate leads to an upper bound on the product of a charged partic…
A Supersymmetric Higgs Sector with Chiral D-terms
Nathaniel Craig, Andrey Katz
Although supersymmetry remains the best candidate for solving the electroweak hierarchy problem, a supersymmetric Higgs boson near 125 GeV requires heavy scalars, highly-mixed stop…
A Fat Higgs with a Magnetic Personality
Nathaniel Craig, Daniel Stolarski, Jesse Thaler
We introduce a novel composite Higgs theory based on confining supersymmetric QCD. Supersymmetric duality plays a key role in this construction, with a "fat" Higgs boson emerging a…
The Hunt for the Rest of the Higgs Bosons
Nathaniel Craig, Francesco D'Eramo, Patrick Draper +2
We assess the current state of searches at the LHC for additional Higgs bosons in light of both direct limits and indirect bounds coming from coupling measurements of the Standard…
The Muon Collider
Carlotta Accettura, Simon Adrian, Rohit Agarwal +450
Muons offer a unique opportunity to build a compact high-energy electroweak collider at the 10 TeV scale. A Muon Collider enables direct access to the underlying simplicity of the…
The New Flavor of Higgsed Gauge Mediation
Nathaniel Craig, Matthew McCullough, Jesse Thaler
Recent LHC bounds on squark masses combined with naturalness and flavor considerations motivate non-trivial sfermion mass spectra in the supersymmetric Standard Model. These can ar…
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
Juliette Alimena, James Beacham, Martino Borsato +198
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Had…
Loops in supergroups
Nathaniel Craig, Emanuele Gendy, Jessica N. Howard
We study the theory of a scalar in the fundamental representation of the internal supergroup . Remarkably, for its tree-level mass does not receive quantum correct…
The Muon Smasher's Guide
Hind Al Ali, Nima Arkani-Hamed, Ian Banta +31
We lay out a comprehensive physics case for a future high-energy muon collider, exploring a range of collision energies (from 1 to 100 TeV) and luminosities. We highlight the advan…
Towards a Muon Collider
Carlotta Accettura, Dean Adams, Rohit Agarwal +294
A muon collider would enable the big jump ahead in energy reach that is needed for a fruitful exploration of fundamental interactions. The challenges of producing muon collisions a…
Exponential Hierarchies from Anderson Localization in Theory Space
Nathaniel Craig, Dave Sutherland
We present a new mechanism for generating exponential hierarchies in four-dimensional field theories inspired by Anderson localization in one dimension, exploiting an analogy betwe…
Exploring Optimal Transport for Event-Level Anomaly Detection at the Large Hadron Collider
Nathaniel Craig, Jessica N. Howard, Hancheng Li
Anomaly detection is a promising, model-agnostic strategy to find physics beyond the Standard Model. State-of-the-art machine learning methods offer impressive performance on anoma…
Structures of Neural Network Effective Theories
Ian Banta, Tianji Cai, Nathaniel Craig +1
We develop a diagrammatic approach to effective field theories (EFTs) corresponding to deep neural networks at initialization, which dramatically simplifies computations of finite-…
Multi-Lepton Signals of Top-Higgs Associated Production
Nathaniel Craig, Michael Park, Jessie Shelton
We evaluate the potential to measure ttbar H associated production at the LHC using non-resonant multi-lepton final states in conjunction with two or more b-tags. The multi-lepton…
Report of the 2021 U.S. Community Study on the Future of Particle Physics (Snowmass 2021) Summary Chapter
Joel N. Butler, R. Sekhar Chivukula, André de Gouvêa +40
The 2021-22 High-Energy Physics Community Planning Exercise (a.k.a. ``Snowmass 2021'') was organized by the Division of Particles and Fields of the American Physical Society. Snowm…
The Phase Space Distance Between Collider Events
Tianji Cai, Junyi Cheng, Nathaniel Craig +2
How can one fully harness the power of physics encoded in relativistic -body phase space? Topologically, phase space is isomorphic to the product space of a simplex and a hypers…
Effective Field Theories as Lagrange Spaces
Nathaniel Craig, Yu-Tse Lee, Xiaochuan Lu +1
We present a formulation of scalar effective field theories in terms of the geometry of Lagrange spaces. The horizontal geometry of the Lagrange space generalizes the Riemannian ge…
A Complete Model of Low-Scale Gauge Mediation
Nathaniel Craig, Simon Knapen, David Shih +1
Recent signs of a Standard Model-like Higgs at 125 GeV point towards large A-terms in the MSSM. This presents special challenges for gauge mediation, which by itself predicts vanis…
Flavor Mediation Delivers Natural SUSY
Nathaniel Craig, Matthew McCullough, Jesse Thaler
If supersymmetry (SUSY) solves the hierarchy problem, then naturalness considerations coupled with recent LHC bounds require non-trivial superpartner flavor structures. Such "Natur…
TF08 Snowmass Report: BSM Model Building
Patrick J. Fox, Graham D. Kribs, Hitoshi Murayama +53
We summarize the state of Beyond the Standard Model (BSM) model building in particle physics for Snowmass 2021, focusing mainly on several whitepaper contributions to BSM model bui…
The Physics of Light Relics
Cora Dvorkin, Joel Meyers, Peter Adshead +19
Many well-motivated extensions of the Standard Model predict the existence of new light species that may have been produced in the early universe. Prominent examples include axions…
A Case for Future Lepton Colliders
Nathaniel Craig
I present a case for proposed future linear and circular lepton colliders as ideal machines for understanding and exploration. As machines for understanding, they provide unprecede…
No s is Good News
Nathaniel Craig, Daniel Green, Joel Meyers +1
The baryon acoustic oscillation (BAO) analysis from the first year of data from the Dark Energy Spectroscopic Instrument (DESI), when combined with data from the cosmic microwave b…
Phases of N=1 supersymmetric chiral gauge theories
Nathaniel Craig, Rouven Essig, Anson Hook +1
We analyze the phases of supersymmetric chiral gauge theories with an antisymmetric tensor and (anti)fundamental flavors, in the presence of a classically marginal superpotential d…
Optimal Transport for Particle Classification in LArTPC Neutrino Experiments
David Caratelli, Nathaniel Craig, Chuyue Fang +1
The efficient classification of electromagnetic activity from and electrons remains an open problem in the reconstruction of neutrino interactions in Liquid Argon Time Proje…
Which Metric on the Space of Collider Events?
Tianji Cai, Junyi Cheng, Katy Craig +1
Which is the best metric for the space of collider events? Motivated by the success of the Energy Mover's Distance in characterizing collider events, we explore the larger space of…
Precision Higgsstrahlung as a Probe of New Physics
Nathaniel Craig, Marco Farina, Matthew McCullough +1
A "Higgs factory", an electron-positron collider with center-of-mass energy of about 250 GeV, will measure the cross section of the Higgsstrahlung process, ,…
The Orbifold Higgs
Nathaniel Craig, Simon Knapen, Pietro Longhi
We introduce and systematically study an expansive class of "orbifold Higgs" theories in which the weak scale is protected by accidental symmetries arising from the orbifold reduct…
Loops and trees in generic EFTs
Nathaniel Craig, Minyuan Jiang, Ying-Ying Li +1
We consider aspects of tree and one-loop behavior in a generic 4d EFT of massless scalars, fermions, and vectors, with a particular eye to the high-energy limit of the Standard Mod…
Snowmass White Paper: Strong CP Beyond Axion Direct Detection
Nikita Blinov, Nathaniel Craig, Matthew J. Dolan +5
We sketch recent progress and promising future directions for research connected with the strong CP problem. Topics surveyed include axion dark matter substructure and its gravitat…
The Vector-like Twin Higgs
Nathaniel Craig, Simon Knapen, Pietro Longhi +1
We present a version of the twin Higgs mechanism with vector-like top partners. In this setup all gauge anomalies automatically cancel, even without twin leptons. The matter conten…
Effective Field Theory of the Two Higgs Doublet Model
Ian Banta, Timothy Cohen, Nathaniel Craig +2
We revisit the effective field theory of the two Higgs doublet model at tree level. The introduction of a novel basis in the UV theory allows us to derive matching coefficients in…
The State of Supersymmetry after Run I of the LHC
Nathaniel Craig
In these lectures I survey the state of supersymmetric extensions of the Standard Model in light of data from the first run of the LHC. After assessing pre-LHC expectations based o…
Weakly supervised anomaly detection with event-level variables
Liam Brennan, Tamas Almos Vami, Oz Amram +7
We introduce a new topology for weakly supervised anomaly detection searches, di-object plus~X. In this topology, one looks for a resonance decaying to two standard model particles…
MuCol Milestone Report No. 7: Consolidated Parameters
Rebecca Taylor, Antoine Chancé, Dario Augusto Giove +459
This document is comprised of a collection of consolidated parameters for the key parts of the muon collider. These consolidated parameters follow on from the October 2024 Prelimin…
Dynamical Supersymmetry Breaking, with Flavor
Nathaniel Craig, Rouven Essig, Sebastian Franco +2
We explore calculable models with low-energy supersymmetry where the flavor hierarchy is generated by quark and lepton compositeness, and where the composites emerge from the same…
MuCol Milestone Report No. 5: Preliminary Parameters
Carlotta Accettura, Simon Adrian, Rohit Agarwal +391
This document is comprised of a collection of updated preliminary parameters for the key parts of the muon collider. The updated preliminary parameters follow on from the October 2…
Exploring Peaks and Valleys in the Diphoton Spectrum
Nathaniel Craig, Sophie Renner, Dave Sutherland
We investigate the effects of resonance-continuum interference on the diphoton spectrum in the presence of a new spin-0 or spin-2 state produced via gluons or quarks and decaying t…
String Photini at the LHC
Asimina Arvanitaki, Nathaniel Craig, Savas Dimopoulos +2
String theories with topologically complex compactification manifolds suggest the simultaneous presence of many unbroken U(1)'s without any light matter charged under them. The gau…
IR Dynamics from UV Divergences: UV/IR Mixing, NCFT, and the Hierarchy Problem
Nathaniel Craig, Seth Koren
The persistence of the hierarchy problem points to a violation of effective field theory expectations. A compelling possibility is that this results from a physical breakdown of EF…
Supersymmetric geometry in non-supersymmetric effective field theory
Nathaniel Craig, Andrew Fee, Yu-Tse Lee
We develop a geometric framework for non-supersymmetric effective gauge theories based on their nonlinear supersymmetrizations. We construct supersymmetric embeddings for most oper…
Doubling down on naturalness with a supersymmetric twin Higgs
Nathaniel Craig, Kiel Howe
We show that naturalness of the weak scale can be comfortably reconciled with both LHC null results and observed Higgs properties provided the double protection of supersymmetry an…
LHC Charge Asymmetry as Constraint on Models for the Tevatron Top Anomaly
Nathaniel Craig, Can Kilic, Matthew J. Strassler
The forward-backward asymmetry in top quark production at the Tevatron has been observed to be anomalously large by both CDF and D0. It has been suggested that a…
Supersymmetry in the shadow of photini
Masha Baryakhtar, Nathaniel Craig, Ken Van Tilburg
Additional neutral gauge fermions -- "photini" -- arise in string compactifications as superpartners of U(1) gauge fields. Unlike their vector counterparts, the photini can acquire…
Neutral Naturalness from the Orbifold Higgs
Nathaniel Craig, Simon Knapen, Pietro Longhi
We present a general class of natural theories in which the Higgs is a pseudo-goldstone boson in an orbifolded gauge theory. The symmetry protecting the Higgs at low energies is an…
Generalized symmetries and emergence in axion effective field theories
Dan Sehayek, Nathaniel Craig
We study the phenomenological consequences of higher symmetry structures in axion effective field theories. Higher-group and non-invertible symmetries impose parametric constraints…
Folded Supersymmetry with a Twist
Timothy Cohen, Nathaniel Craig, Hou Keong Lou +1
Folded supersymmetry (f-SUSY) stabilizes the weak scale against radiative corrections from the top sector via scalar partners whose gauge quantum numbers differ from their Standard…
Testing Split Supersymmetry with Inflation
Nathaniel Craig, Daniel Green
Split supersymmetry (SUSY) -- in which SUSY is relevant to our universe but largely inaccessible at current accelerators -- has become increasingly plausible given the absence of n…
Heavy Higgs Scalars at Future Hadron Colliders (A Snowmass Whitepaper)
Eric Brownson, Nathaniel Craig, Ulrich Heintz +4
We investigate the prospects for discovery or exclusion of additional Higgs scalars at the 14 TeV and 33 TeV LHC in the context of theories with two Higgs doublets. We focus on the…
Searching for with Multi-Leptons
Nathaniel Craig, Jared A. Evans, Richard Gray +4
The results of a multi-lepton search conducted by the CMS collaboration with 5 fb of data collected from 7 TeV collisions are used to place the first bound on the rare…
High-Quality Axions from Higher-Form Symmetries in Extra Dimensions
Nathaniel Craig, Marius Kongsore
The extra-dimensional axion solves the strong CP problem while largely circumventing the quality problem that plagues its four-dimensional counterparts. Such high quality can be cl…
The Photophobic ALP
Nathaniel Craig, Anson Hook, Skyler Kasko
We explore models and phenomenology of a photophobic axion-like particle (ALP), an axion whose coupling to photons is maximally suppressed without fine-tuning of the underlying par…
Unitarity Violation and the Geometry of Higgs EFTs
Timothy Cohen, Nathaniel Craig, Xiaochuan Lu +1
We derive the scale of unitarity violation from the geometry of Effective Field Theory (EFT) extensions of the Standard Model Higgs sector. The high-energy behavior of amplitudes w…
Multi-Lepton Signals of Multiple Higgs Bosons
Nathaniel Craig, Jared A. Evans, Richard Gray +4
We identify and investigate novel multi-lepton signatures of extended Higgs sectors at the LHC in the guise of CP- and flavor-conserving two-Higgs-doublet models (2HDMs). Rather th…
Scherk-Schwarz Supersymmetry Breaking in 4D
Nathaniel Craig, Hou Keong Lou
Using the techniques of dimensional deconstruction, we present 4D models that fully reproduce the physics of 5D supersymmetric theories compactified on an S^1/Z_2 orbifold with gen…
General Messenger Higgs Mediation
Nathaniel Craig, Simon Knapen, David Shih
We present a general formalism for analyzing supersymmetric models where the Higgs sector directly couples to the messengers of supersymmetry breaking. Such Higgs-messenger interac…
Ripples in Spacetime from Broken Supersymmetry
Nathaniel Craig, Noam Levi, Alberto Mariotti +1
We initiate the study of gravitational wave (GW) signals from first-order phase transitions in supersymmetry-breaking hidden sectors. Such phase transitions often occur along a pse…
The unexplored landscape of two-body resonances
Nathaniel Craig, Patrick Draper, Kyoungchul Kong +2
We propose a strategy for searching for theoretically-unanticipated new physics which avoids a large trials factor by focusing on experimental strengths. Searches for resonances de…
A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
Sergey Alekhin, Wolfgang Altmannshofer, Takehiko Asaka +82
This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (Search for Hidden Particles) experiment is intended to hunt for new physics in the larg…
Split families unified
Nathaniel Craig, Savas Dimopoulos, Tony Gherghetta
We present a simple supersymmetric model of split families consistent with flavor limits that preserves the successful prediction of gauge coupling unification and naturally accoun…
Report of the Topical Group on Physics Beyond the Standard Model at Energy Frontier for Snowmass 2021
Tulika Bose, Antonio Boveia, Caterina Doglioni +318
This is the Snowmass2021 Energy Frontier (EF) Beyond the Standard Model (BSM) report. It combines the EF topical group reports of EF08 (Model-specific explorations), EF09 (More gen…
Twin Turtles
Pouya Asadi, Nathaniel Craig, Ying-Ying Li
We present an ultraviolet extension of the Twin Higgs in which the radial mode of twin symmetry breaking is itself a pseudo-goldstone boson. This "turtle" structure raises the scal…
A New Probe of Naturalness
Nathaniel Craig, Christoph Englert, Matthew McCullough
Any new scalar fields that perturbatively solve the hierarchy problem by stabilizing the Higgs mass also generate new contributions to the Higgs field-strength renormalization, irr…
Naturalness: A Snowmass White Paper
Nathaniel Craig
We assess the state of naturalness in high-energy physics and summarize recent approaches to the three major naturalness problems: the cosmological constant problem, the electrowea…
Complete One-Loop Matching for a Singlet Scalar in the Standard Model EFT
Minyuan Jiang, Nathaniel Craig, Ying-Ying Li +1
We present the results of the first complete one-loop matching calculation between the real singlet scalar extension of the Standard Model and the Standard Model effective field th…
Cosmology in Mirror Twin Higgs and Neutrino Masses
Zackaria Chacko, Nathaniel Craig, Patrick J. Fox +1
We explore a simple solution to the cosmological challenges of the original Mirror Twin Higgs (MTH) model that leads to interesting implications for experiment. We consider theorie…
The UV Fate of Anomalous s and the Swampland
Nathaniel Craig, Isabel Garcia Garcia, Graham D. Kribs
Massive gauge theories featuring parametrically light vectors are suspected to belong in the Swampland of consistent EFTs that cannot be embedded into a theory of quantum gr…
The second Higgs at the lifetime frontier
Samuel Alipour-fard, Nathaniel Craig, Stefania Gori +2
We assess the current coverage and the future discovery potential of LHC searches for heavy Higgs bosons decaying into long-lived particles (LLPs), focusing primarily on the produc…
Beyond Higgs Couplings: Probing the Higgs with Angular Observables at Future Colliders
Nathaniel Craig, Jiayin Gu, Zhen Liu +1
We study angular observables in the channel at future circular colliders such as CEPC and FCC-ee. Taking into account the impac…
Effective Field Theories on the Jet Bundle
Nathaniel Craig, Yu-Tse Lee
We develop a generalized field space geometry for higher-derivative scalar field theories, expressing scattering amplitudes in terms of a covariant geometry on the all-order jet bu…
Multi-scale Optimal Transport for Complete Collider Events
Tianji Cai, Nathaniel Craig, Katy Craig +1
Building upon the success of optimal transport metrics defined for single collinear jets, we develop a multi-scale framework that models entire collider events as distributions on…
Supersoft Stops
Timothy Cohen, Nathaniel Craig, Seth Koren +2
In a supersymmetric (SUSY) theory, the IR-contributions to the Higgs mass are calculable below the mediation scale in terms of the IR field content and parameters.…
Single-sector supersymmetry breaking, chirality, and unification
Siavosh R. Behbahani, Nathaniel Craig, Gonzalo Torroba
Calculable single-sector models provide an elegant framework for generating the flavor textures via compositeness, breaking supersymmetry, and explaining the electroweak scale. Suc…
Linearized Optimal Transport for Collider Events
Tianji Cai, Junyi Cheng, Katy Craig +1
We introduce an efficient framework for computing the distance between collider events using the tools of Linearized Optimal Transport (LOT). This preserves many of the advantages…
The Hyperbolic Higgs
Timothy Cohen, Nathaniel Craig, Gian F. Giudice +1
We introduce the Hyperbolic Higgs, a novel solution to the little hierarchy problem that features Standard Model neutral scalar top partners. At one-loop order, the protection from…
Rescuing Massive Photons from the Swampland
Nathaniel Craig, Isabel Garcia Garcia
Stringent Swampland conjectures aimed at effective theories containing massive abelian vectors have recently been proposed (arXiv:1808.09966), with striking phenomenological implic…
High-quality Axion Strings from Monopole Strings
Nathaniel Craig, Amalia Madden
Five-dimensional 't Hooft-Polyakov monopole strings whose cores restore a non-abelian gauge symmetry become axion strings for extra-dimensional axions. The parametric separation be…
Cosmological Signals of a Mirror Twin Higgs
Nathaniel Craig, Seth Koren, Timothy Trott
We investigate the cosmology of the minimal model of neutral naturalness, the mirror Twin Higgs. The softly-broken mirror symmetry relating the Standard Model to its twin counterpa…
Long Live the Higgs Factory: Higgs Decays to Long-Lived Particles at Future Lepton Colliders
Samuel Alipour-Fard, Nathaniel Craig, Minyuan Jiang +1
We initiate the study of exotic Higgs decays to long-lived particles (LLPs) at proposed future lepton colliders, focusing on scenarios with displaced hadronic final states. Our ana…
New dynamics and dualities in supersymmetric chiral gauge theories
Nathaniel Craig, Rouven Essig, Anson Hook +1
We analyze the phase structure of supersymmetric chiral gauge theories with gauge group SU(N), an antisymmetric, and F<N+4 flavors, in the presence of a cubic superpotential. When…