Publications (59)
Natural SUSY in Plain Sight
David Curtin, Patrick Meade, Pin-Ju Tien
The basic principle of naturalness has driven the majority of the LHC program, but so far all searches for new physics beyond the SM have come up empty. On the other hand, existing…
MATHUSLA: A Detector Proposal to Explore the Lifetime Frontier at the HL-LHC
Henry Lubatti, Cristiano Alpigiani, Juan Carlos Arteaga-Velázquez +60
The observation of long-lived particles at the LHC would reveal physics beyond the Standard Model, could account for the many open issues in our understanding of our universe, and…
Report of the Topical Group on Higgs Physics for Snowmass 2021: The Case for Precision Higgs Physics
Sally Dawson, Patrick Meade, Isobel Ojalvo +78
A future Higgs Factory will provide improved precision on measurements of Higgs couplings beyond those obtained by the LHC, and will enable a broad range of investigations across t…
Casting Light on BSM Physics with SM Standard Candles
David Curtin, Prerit Jaiswal, Patrick Meade +1
The Standard Model (SM) has had resounding success in describing almost every measurement performed by the ATLAS and CMS experiments. In particular, these experiments have put many…
Unrestored Electroweak Symmetry
Patrick Meade, Harikrishnan Ramani
The commonly assumed cosmological history of our universe is that at early-times and high-temperatures the universe went through an ElectroWeak Phase Transition (EWPT). Assuming an…
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…
Searches for Long Lived Neutral Particles
Patrick Meade, Shmuel Nussinov, Michele Papucci +1
An intriguing possibility for TeV scale physics is the existence of neutral long lived particles (LOLIPs) that subsequently decay into SM states. Such particles are many cases indi…
Transverse momentum resummation effects in W^+W^- measurements
Patrick Meade, Harikrishnan Ramani, Mao Zeng
The W^+W^- cross section has remained one of the most consistently discrepant channels compared to SM predictions at the LHC, measured by both ATLAS and CMS at 7 and 8 TeV. Develop…
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…
Singlet Scalar Resonances and the Diphoton Excess
Samuel D. McDermott, Patrick Meade, Harikrishnan Ramani
ATLAS and CMS recently released the first results of searches for diphoton resonances in 13 TeV data, revealing a modest excess at an invariant mass of approximately 750 GeV. We fi…
Strange quark as a probe for new physics in the Higgs sector
Alexander Albert, Matthew J. Basso, Samuel K. Bright-Thonney +25
This paper describes a novel algorithm for tagging jets originating from the hadronisation of strange quarks (strange-tagging) with the future International Large Detector (ILD) at…
Prompt Decays of General Neutralino NLSPs at the Tevatron
Patrick Meade, Matthew Reece, David Shih
Recent theoretical developments have shown that gauge mediation has a much larger parameter space of possible spectra and mixings than previously considered. Motivated by this, we…
The Future of US Particle Physics -- The Snowmass 2021 Energy Frontier Report
Meenakshi Narain, Laura Reina, Alessandro Tricoli +32
This report, as part of the 2021 Snowmass Process, summarizes the current status of collider physics at the Energy Frontier, the broad and exciting future prospects identified for…
Excluding Electroweak Baryogenesis in the MSSM
David Curtin, Prerit Jaiswal, Patrick Meade
In the context of the MSSM the Light Stop Scenario (LSS) is the only region of parameter space that allows for successful Electroweak Baryogenesis (EWBG). This possibility is very…
How charming can the Higgs be?
Artemis Sofia Giannakopoulou, Patrick Meade, Mauro Valli
The coupling of the Higgs boson to first and second generation fermions has yet to be measured experimentally. There still could be very large deviations in these couplings, as the…
General Gauge Mediation
Patrick Meade, Nathan Seiberg, David Shih
We give a general definition of gauge mediated supersymmetry breaking which encompasses all the known gauge mediation models. In particular, it includes both models with messengers…
Higgs bosons with large couplings to light quarks
Daniel Egana-Ugrinovic, Samuel Homiller, Patrick Meade
A common lore has arisen that beyond the Standard Model (BSM) particles, which can be searched for at current and proposed experiments, should have flavorless or mostly third-gener…
Testing Electroweak Baryogenesis with Future Colliders
David Curtin, Patrick Meade, Chiu-Tien Yu
Electroweak Baryogenesis (EWBG) is a compelling scenario for explaining the matter-antimatter asymmetry in the universe. Its connection to the electroweak phase transition makes it…
U(2)-like Flavor Symmetries and Approximate Bimaximal Neutrino Mixing
Alfredo Aranda, Christopher D. Carone, Patrick Meade
Models involving a U(2) flavor symmetry, or any of a number of its non-Abelian discrete subgroups, can explain the observed hierarchy of charged fermion masses and CKM angles. It i…
Precision diboson measurements and the interplay of pT and jet-veto resummations
Prerit Jaiswal, Patrick Meade, Harikrishnan Ramani
In this paper we demonstrate the agreement of jet-veto resummation and pT resummation for explaining the WW cross sections at Run 1 of the LHC, and in the future. These two resumma…
Electroweak Constraints on Little Higgs Models
Patrick Meade
In this talk I will give a brief introduction to Little Higgs models in general, including an overview of all models in existence thus far. I then review some of the generic constr…
Higgs Physics at a TeV Muon Collider with detailed detector simulation
Paolo Andreetto, Nazar Bartosik, Laura Buonincontri +24
The Muon Collider is one of the most promising future collider facilities with the potential to reach multi-TeV center-of-mass energy and high luminosity. Due to the significant Hi…
Phenomenology of the Littlest Higgs with T-Parity
Jay Hubisz, Patrick Meade
Little Higgs models offer an interesting approach to weakly coupled electroweak symmetry breaking without fine tuning. The original little Higgs models were plagued by strong const…
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…
Higgs-Precision Constraints on Colored Naturalness
Rouven Essig, Patrick Meade, Harikrishnan Ramani +1
The presence of weak-scale colored top partners is among the simplest solutions to the Higgs hierarchy problem and allows for a natural electroweak scale. We examine the constraint…
Top Partners at the LHC: Spin and Mass Measurement
Patrick Meade, Matthew Reece
If one takes naturalness seriously and also assumes a weakly coupled extension of the Standard Model (SM) then there are predictions for phenomenology that can be inferred in a mod…
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…
Exploring General Gauge Mediation
Matthew Buican, Patrick Meade, Nathan Seiberg +1
We explore various aspects of General Gauge Mediation(GGM). We present a reformulation of the correlation functions used in GGM, and further elucidate their IR and UV properties. A…
Odd Tracks at Hadron Colliders
Patrick Meade, Michele Papucci, Tomer Volansky
New physics that exhibits irregular tracks such as kinks, intermittent hits or decay in flight may easily be missed at hadron colliders. We demonstrate this by studying viable mode…
Charginos Hiding In Plain Sight
David Curtin, Prerit Jaiswal, Patrick Meade
Recent 7 TeV 5/fb measurements by ATLAS and CMS have measured both overall and differential WW cross sections that differ from NLO SM predictions. While these measurements aren't s…
BRIDGE: Branching Ratio Inquiry/Decay Generated Events
Patrick Meade, Matthew Reece
We present the manual for the program BRIDGE: Branching Ratio Inquiry/Decay Generated Events. The program is designed to operate with arbitrary models defined within matrix element…
Thermal Resummation and Phase Transitions
David Curtin, Patrick Meade, Harikrishnan Ramani
The consequences of phase transitions in the early universe are becoming testable in a variety of manners, from colliders physics to gravitational wave astronomy. In particular one…
The physics case of a 3 TeV muon collider stage
Jorge De Blas, Dario Buttazzo, Rodolfo Capdevilla +131
In the path towards a muon collider with center of mass energy of 10 TeV or more, a stage at 3 TeV emerges as an appealing option. Reviewing the physics potential of such muon coll…
Light Scalars and the KOTO Anomaly
Daniel Egana-Ugrinovic, Samuel Homiller, Patrick Meade
The KOTO experiment recently presented a significant excess of events in their search for the rare SM process , well above both Standard Model signal and back…
Implications of a 125 GeV Higgs for the MSSM and Low-Scale SUSY Breaking
Patrick Draper, Patrick Meade, Matthew Reece +1
Recently, the ATLAS and CMS collaborations have announced exciting hints for a Standard Model-like Higgs boson at a mass of approximately 125 GeV. In this paper, we explore the pot…
Design Initiative for a 10 TeV pCM Wakefield Collider
Spencer Gessner, Jens Osterhoff, Carl A. Lindstrøm +198
This document outlines a community-driven Design Study for a 10 TeV pCM Wakefield Accelerator Collider. The 2020 ESPP Report emphasized the need for Advanced Accelerator R\&D, and…
Precision Higgs Width and Couplings with a High Energy Muon Collider
Matthew Forslund, Patrick Meade
The interpretation of Higgs data is typically based on different assumptions about whether there can be additional decay modes of the Higgs or if any couplings can be bounded by th…
Black Holes and Quantum Gravity at the LHC
Patrick Meade, Lisa Randall
We argue that the highly studied black hole signatures based on thermal multiparticle final states are very unlikely and only occur in a very limited parameter regime if at all. Ho…
Electroweak Precision Constraints on the Littlest Higgs Model with T Parity
Jay Hubisz, Patrick Meade, Andrew Noble +1
We compute the leading corrections to the properties of W and Z bosons induced at the one-loop level in the SU(5)/SO(5) Littlest Higgs model with T parity, and perform a global fit…
TASI Lectures on Electroweak Symmetry Breaking from Extra Dimensions
Csaba Csaki, Jay Hubisz, Patrick Meade
This is a pedagogical introduction into the possible uses and effects of extra dimensions in electroweak (TeV scale) physics, and in particular to models of electroweak symmetry br…
Multi-Higgs Production Probes Higgs Flavor
Daniel Egana-Ugrinovic, Samuel Homiller, Patrick Meade
We demonstrate that multiple-Higgs production at the LHC is the most sensitive probe of first and second-generation quark flavor in the Higgs sector. In models where new scalars co…
High Precision Higgs from High Energy Muon Colliders
Matthew Forslund, Patrick Meade
Muon colliders are an exciting possibility for reaching the highest energies possible on the shortest timescale. They potentially combine the greatest strengths of and $pp…
The Status of GMSB After 1/fb at the LHC
Yevgeny Kats, Patrick Meade, Matthew Reece +1
We thoroughly investigate the current status of supersymmetry in light of the latest searches at the LHC, using General Gauge Mediation (GGM) as a well-motivated signature generato…
Long-Lived Neutralino NLSPs
Patrick Meade, Matthew Reece, David Shih
We investigate the collider signatures of heavy, long-lived, neutral particles that decay to charged particles plus missing energy. Specifically, we focus on the case of a neutrali…
Measurement of the Triple Higgs Coupling at a HE-LHC
Samuel Homiller, Patrick Meade
The currently unmeasured triple Higgs coupling is one of the strong motivations for future physics programs at the LHC and beyond. A sufficiently precise measurement can lead to qu…
MATHUSLA: An External Long-Lived Particle Detector to Maximize the Discovery Potential of the HL-LHC
Branden Aitken, Cristiano Alpigiani, Juan Carlos Arteaga-Velázquez +70
We present the current status of the MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles) long-lived particle (LLP) detector at the HL-LHC, covering the design, f…
A Mixed Phase of SUSY Gauge Theories from a-Maximization
Csaba Csaki, Patrick Meade, John Terning
We study N=1 supersymmetric SU(N) gauge theories with an antisymmetric tensor and F flavors using the recent proposal of a-maximization by Intriligator and Wecht. This theory had p…
Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case
David Curtin, Marco Drewes, Matthew McCullough +85
We examine the theoretical motivations for long-lived particle (LLP) signals at the LHC in a comprehensive survey of Standard Model (SM) extensions. LLPs are a common prediction of…
Aligned and Spontaneous Flavor Violation
Daniel Egana-Ugrinovic, Samuel Homiller, Patrick Meade
We present a systematic spurion setup called Aligned Flavor Violation (AFV) that allows for new physics couplings to quarks that are aligned with the Standard Model (SM) Yukawas, b…
Recent Progress and Next Steps for the MATHUSLA LLP Detector
Cristiano Alpigiani, Juan Carlos Arteaga-Velázquez, Austin Ball +93
We report on recent progress and next steps in the design of the proposed MATHUSLA Long Lived Particle (LLP) detector for the HL-LHC as part of the Snowmass 2021 process. Our under…
Conceptual Design Report for the MATHUSLA Long-Lived Particle Detector near CMS
Branden Aitken, Cristiano Alpigiani, Juan Carlos Arteaga-Velázquez +70
We present the Conceptual Design Report (CDR) for the MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles) long-lived particle detector at the HL-LHC, covering th…
Dark Matter Sees The Light
Patrick Meade, Michele Papucci, Tomer Volansky
We construct a Dark Matter (DM) annihilation module that can encompass the predictions from a wide array of models built to explain the recently reported PAMELA and ATIC/PPB-BETS e…
Dark Matter Interpretations of the Electron/Positron Excesses after FERMI
Patrick Meade, Michele Papucci, Alessandro Strumia +1
The cosmic-ray excess observed by PAMELA in the positron fraction and by FERMI and HESS in the electron + positron flux can be interpreted in terms of DM annihilations or decays in…
An Update to the Letter of Intent for MATHUSLA: Search for Long-Lived Particles at the HL-LHC
Cristiano Alpigiani, Juan Carlos Arteaga-Velázquez, Austin Ball +80
We report on recent progress in the design of the proposed MATHUSLA Long Lived Particle (LLP) detector for the HL-LHC, updating the information in the original Letter of Intent (Lo…
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…
Multi-Boson Interactions at the LHC
Daniel R. Green, Patrick Meade, Marc-Andre Pleier
This review covers results on the production of all possible electroweak boson pairs and 2-to-1 vector boson fusion at the CERN Large Hadron Collider (LHC) in proton-proton collisi…
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…
A Letter of Intent for MATHUSLA: a dedicated displaced vertex detector above ATLAS or CMS
Cristiano Alpigiani, Austin Ball, Liron Barak +61
In this Letter of Intent (LOI) we propose the construction of MATHUSLA (MAssive Timing Hodoscope for Ultra-Stable neutraL pArticles), a dedicated large-volume displaced vertex dete…