385 citations · 2.1k across the 56 of their papers we have counts for
42 papers · 1 filter
Searching for axions with kaon decay at rest
Yohei Ema, Zhen Liu, Ryan Plestid
We describe a novel search strategy for axions (or hadronically coupled axion-like particles) in the mass range of . The search relies on kaon decay at…
Top Yukawa Coupling Determination at High Energy Muon Collider
Zhen Liu, Kun-Feng Lyu, Ishmam Mahbub +1
The Top Yukawa coupling profoundly influences several core mysteries linked to the electroweak scale and the Higgs boson. We study the feasibility of measuring the Top Yukawa coupl…
Heavy Neutral Leptons from Stopped Muons and Pions
Yohei Ema, Zhen Liu, Kun-Feng Lyu +1
Stopped muons, which are generic in pion-at-rest experiments, can shed light on heavy neutral leptons (HNLs) in unexplored parameter spaces. If the HNL is lighter than the muon, th…
A Guide to Diagnosing Colored Resonances at Hadron Colliders
Tao Han, Ian M. Lewis, Hongkai Liu +2
We present a comprehensive study on how to distinguish the properties of heavy dijet resonances at hadron colliders. A variety of spins, chiral couplings, charges, and QCD color re…
Heavy Neutral Leptons at Muon Colliders
Peiran Li, Zhen Liu, Kun-Feng Lyu
The future high-energy muon colliders, featuring both high energy and low background, could play a critical role in our searches for new physics. The smallness of neutrino mass is…
Flavor-changing light bosons with accidental longevity
Yohei Ema, Zhen Liu, Kun-Feng Lyu +1
We consider a model with a complex scalar field that couples to or within the "longevity" window: in which and $l_2…
Enhancing Searches for Heavy QCD Axions via Dimuon Final States
Raymond T. Co, Soubhik Kumar, Zhen Liu
Heavy QCD axions are well-motivated extensions of the QCD axion that address the quality problem while still solving the strong CP problem. Owing to the gluon coupling, critical fo…
Report of the Topical Group on Electroweak Precision Physics and Constraining New Physics for Snowmass 2021
Alberto Belloni, Ayres Freitas, Junping Tian +65
The precise measurement of physics observables and the test of their consistency within the standard model (SM) are an invaluable approach, complemented by direct searches for new…
Speculations on the W-Mass Measurement at CDF
Jiayin Gu, Zhen Liu, Teng Ma +1
The W Mass determination at the Tevatron CDF experiment reported a deviation from the SM expectation at 7 level. We discuss a few possible interpretations and their collider imp…
Probing the Electroweak Phase Transition with Exotic Higgs Decays
Marcela Carena, Jonathan Kozaczuk, Zhen Liu +5
An essential goal of the Higgs physics program at the LHC and beyond is to explore the nature of the Higgs potential and shed light on the mechanism of electroweak symmetry breakin…
WIMP Dark Matter at High Energy Muon Colliders A White Paper for Snowmass 2021
Tao Han, Zhen Liu, Lian-Tao Wang +1
In a previous publication, we showed that a high energy muon collider can make decisive statements about the electroweak (WIMP) Dark Matter (DM), reaching a DM mass which could giv…
Higgs Precision at a 125 GeV Muon Collider
Jorge de Blas, Jiayin Gu, Zhen Liu
The -channel resonant production of the Higgs boson at a 125 GeV muon collider enables a unique way to determine the Higgs properties. However, a clear picture of the achievable…
Neutrino Self-Interactions: A White Paper
Jeffrey M. Berryman, Nikita Blinov, Vedran Brdar +31
Neutrinos are the Standard Model (SM) particles which we understand the least, often due to how weakly they interact with the other SM particles. Beyond this, very little is known…
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…
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…
Sleptonic SUSY: From UV Framework to IR Phenomenology
Kaustubh Agashe, Majid Ekhterachian, Zhen Liu +1
We study an attractive scenario, "Sleptonic SUSY", which reconciles the GeV Higgs scalar and the non-observation of superpartners thus far with potentially pivotal roles for…
Unveiling Hidden Physics at the LHC
Oliver Fischer, Bruce Mellado, Stefan Antusch +30
The field of particle physics is at the crossroads. The discovery of a Higgs-like boson completed the Standard Model (SM), but the lacking observation of convincing resonances Beyo…
Jet Timing
Wen Han Chiu, Zhen Liu, Matthew Low +1
The measurement of the arrival time of a particle, such as a lepton, a photon, or a pion, reaching the detector provides valuable information. A similar measurement for a hadronic…
Exploring Uncharted Soft Displaced Vertices in Open Data
Haipeng An, Zhen Hu, Zhen Liu +1
A cluster of soft displaced tracks corresponds to the dark matter co-annihilation regime. The long-lived regime is, in particular, motivated by the unexplored top partner physics.…
Millicharged Particles in Liquid Argon Neutrino Experiments
Roni Harnik, Zhen Liu, Ornella Palamara
We investigate the potential of Liquid Argon (LAr) neutrino detectors to search for millicharged particles, a well-motivated extension of the standard model. Detectors located down…
Heavy Higgs as a Portal to the Supersymmetric Electroweak Sector
Stefania Gori, Zhen Liu, Bibhushan Shakya
The electroweak sector of the Minimal Supersymmetric Standard Model (MSSM) - neutralinos, charginos and sleptons - remains relatively weakly constrained at the LHC due in part to t…
New physics implication of Higgs precision measurements
Ning Chen, Jiayin Gu, Tao Han +7
Studying the properties of the Higgs boson can be an important window to explore the physics beyond the Standard Model (SM). In this work, we present studies on the implications of…
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…
Probing Electroweak Phase Transition via Enhanced Di-Higgs Production
Marcela Carena, Zhen Liu, Marc Riembau
We consider a singlet extension of the Standard Model (SM) with a spontaneous breaking and study the gluon-gluon fusion production of the heavy scalar, with subsequent decay…