58 citations · 239 across the 21 of their papers we have counts for
22 papers
SN1987A constraints on the neutrino-dark-fermion interaction from resonant scattering with CB
Christina Gao, Ke Hu, Kun-Feng Lyu +1
Neutrino self-interactions mediated by a light scalar offer a compelling resolution to cosmological tensions and may naturally arise in neutrino mass generation mechanisms. When th…
LHC Shines on Positivity
Zhen Liu, Kun-Feng Lyu, Tong Arthur Wu
We show that hadron colliders have an excellent reach for positivity tests on a class of diphoton operators. Due to the helicity selection rules, the relevant dimension-6 operators…
-Boson Exotic Decay into Three Charged Leptons at the LHC
Yifan Fei, Peiran Li, Zhen Liu +2
We investigate the boson's exotic decay channel, , at the LHC. Although the four-body final states suppress the decay branching ratio, the large p…
Momentum shift and on-shell recursion relation for electroweak theory
Yohei Ema, Ting Gao, Wenqi Ke +3
We study the All-Line Transverse (ALT) shift which we developed for on-shell recursion of amplitudes for particles of any mass. We discuss the validity of the shift for general the…
A Light QCD Axion with Hilltop Misalignment
Raymond T. Co, Tony Gherghetta, Zhen Liu +1
We study the cosmological evolution of a light QCD axion and identify the parameter space to obtain the correct relic dark matter abundance. The axion potential is flattened at the…
Momentum shift and on-shell constructible massive amplitudes
Yohei Ema, Ting Gao, Wenqi Ke +3
We construct tree-level amplitude for massive particles using on-shell recursion relations based on two classes of momentum shifts: an all-line transverse shift that deforms moment…
Higgs Width and Couplings at High Energy Muon Colliders with Forward Muon Detection
Peiran Li, Zhen Liu, Kun-Feng Lyu
We propose a novel method using the -fusion channel and forward muon detection at high-energy muon colliders to address the challenge of the Higgs coupling-width degeneracy. Ou…
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…
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…
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…
-Boson Mass, Electroweak Precision Tests and SMEFT
JiJi Fan, Lingfeng Li, Tao Liu +1
Recently the CDF collaboration at the Tevatron reported a significant discrepancy between the direct measurement of the -boson mass and its Standard Model (SM) prediction based…
The Forward Physics Facility at the High-Luminosity LHC
Jonathan L. Feng, Felix Kling, Mary Hall Reno +233
High energy collisions at the High-Luminosity Large Hadron Collider (LHC) produce a large number of particles along the beam collision axis, outside of the acceptance of existing L…
Radio Signals from Axion Star-Neutron Star Binaries
Chris Kouvaris, Tao Liu, Kun-Feng Lyu
Axion stars could form binaries with neutron stars. Given the extremely strong external magnetic field exhibited by individual neutron stars, there can be a substantial conversion…
Gravitational Waves from an Inflation Triggered First-Order Phase Transition
Haipeng An, Kun-Feng Lyu, Lian-Tao Wang +1
Large excursion of the inflaton field can trigger interesting dynamics. One important example is a first-order phase transition in a spectator sector which couples to the inflaton.…
The BH-PSR Gravitational Molecule
Tao Liu, Kun-Feng Lyu
While an axion-clouded black hole (BH) encounters a pulsar (PSR) or has a PSR companion, a "gravitational molecule" can be formed. In such a system, the axion cloud evolves at the…
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…
A unique gravitational wave signal from phase transition during inflation
Haipeng An, Kun-Feng Lyu, Lian-Tao Wang +1
We study the properties of the gravitational wave (GW) signals produced by first order phase transitions during the inflation era. We show that the power spectrum of the GW oscilla…
Self-interacting neutrinos: solution to Hubble tension versus experimental constraints
Kun-Feng Lyu, Emmanuel Stamou, Lian-Tao Wang
Exotic self-interactions among the Standard-Model neutrinos have been proposed as a potential reason behind the tension in the expansion rate, H0, of the universe inferred from dif…
Probing Quartic Higgs Self-Interaction
Tao Liu, Kun-Feng Lyu, Jing Ren +1
The Higgs self-interactions play a crucial role for exploring the underlying mechanism of electroweak symmetry breaking and the nature of the phase transition involved. In this art…
Probing 6D Operators at Future Colliders
Wen Han Chiu, Sze Ching Leung, Tao Liu +2
We explore the sensitivities at future colliders to probe a set of six-dimensional operators which can modify the SM predictions on Higgs physics and electroweak precision…