244 citations · 1.1k across the 39 of their papers we have counts for
40 papers
Feasibility Study of Lepton Number Violation in Rare and Meson Decays
Motoi Endo, Kåre Fridell, Sho Iwamoto +2
We study lepton-number-violating interactions at dimension seven in the Standard Model effective field theory that contribute to the meson decays and . Such…
Sub-GeV dark matter search at ILC beam dumps
Kento Asai, Sho Iwamoto, Maxim Perelstein +2
Light dark matter particles may be produced in electron and positron beam dumps of the International Linear Collider (ILC). We propose an experimental setup to search for such even…
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…
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…
Stau study at the ILC and its implication for the muon g-2 anomaly
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto +4
Once all the sleptons as well as the Bino are observed at the ILC, the Bino contribution to the muon anomalous magnetic dipole moment (muon ) in supersymmetric (SUSY) models c…
Supersymmetric explanation of the muon g-2 anomaly with and without stable neutralino
Manimala Chakraborti, Sho Iwamoto, Jong Soo Kim +2
In this paper we explore the possibility of explaining the muon anomaly in various types of supersymmetric extensions of the Standard Model. In particular, we investigate and…
Sterile neutrino dark matter in a U(1) extension of the standard model
Károly Seller
We explore the possibilities of dark matter production in a U(1) extension of the standard model, also called the super-weak model. The freeze-in and freeze-out mechanisms are desc…
New physics searches at the ILC positron and electron beam dumps
Kento Asai, Sho Iwamoto, Yasuhito Sakaki +1
We study capability of the ILC beam dump experiment to search for new physics, comparing the performance of the electron and positron beam dumps. The dark photon, axion-like partic…
One-loop corrections to light neutrino masses in gauged U(1) extensions of the standard model
Sho Iwamoto, Timo J. Kärkkäinen, Zoltán Péli +1
We consider gauged U(1) extensions of the standard model of particle physics with three right-handed sterile neutrinos and a singlet scalar. The neutrinos obtain mass via the type…
Wino-Higgsino dark matter in the MSSM from the anomaly
Sho Iwamoto, Tsutomu T. Yanagida, Norimi Yokozaki
In this letter, we show that the wino-Higgsino dark matter (DM) is detectable in near future DM direct detection experiments for almost all consistent parameter space in the sponta…
Sterile neutrino dark matter in a U(1) extension of the standard model
Sho Iwamoto, Károly Seller, Zoltán Trócsányi
We explore the parameter space of a U(1) extension of the standard model -- also called the super-weak model -- from the point of view of explaining the observed dark matter energy…
Supersymmetric Interpretation of the Muon Anomaly
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto +1
The Fermilab Muon collaboration recently announced the first result of measurement of the muon anomalous magnetic moment (), which confirmed the previous result at the B…
The Large Hadron-Electron Collider at the HL-LHC
P. Agostini, H. Aksakal, S. Alekhin +333
The Large Hadron electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) to the energy and intensity frontier of particle physics. Exploiting ener…
Muon g-2 vs LHC Run 2 in Supersymmetric Models
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto +1
Supersymmetric models with sub-TeV charginos and sleptons have been a candidate for the origin of the long-standing discrepancy in the muon anomalous magnetic moment (g-2). By gath…
Search for the SUSY Electroweak Sector at Colliders
Georges Azuelos, Monica D'Onofrio, Sho Iwamoto +1
The sensitivity of future electron-proton colliders, the LHeC and FCC-eh, to weakly-produced supersymmetric particles is evaluated in this article. Supersymmetric scenarios where c…
Type-I Seesaw as the Common Origin of Neutrino Mass, Baryon Asymmetry, and the Electroweak Scale
Vedran Brdar, Alexander J. Helmboldt, Sho Iwamoto +1
The type-I seesaw represents one of the most popular extensions of the Standard Model. Previous studies of this model have mostly focused on its ability to explain neutrino oscilla…
Dark quarkonium formation in the early universe
Michael Geller, Sho Iwamoto, Gabriel Lee +2
The relic abundance of heavy stable particles charged under a confining gauge group can be depleted by a second stage of annihilations near the deconfinement temperature. This proc…
Probing minimal SUSY scenarios in the light of muon and dark matter
Motoi Endo, Koichi Hamaguchi, Sho Iwamoto +1
We study supersymmetric (SUSY) models in which the muon discrepancy and the dark matter relic abundance are simultaneously explained. The muon discrepancy, or a 3 de…
Tagging new physics with charm
Sho Iwamoto, Gabriel Lee, Yael Shadmi +1
We propose a new variable, the charm fraction, for collider searches for new physics. We analyze this variable in the context of searches for simplified supersymmetry models with s…
Heavy Bino Dark Matter and Collider Signals in the MSSM with Vector-like 4th-Generation Particles
Mohammad Abdullah, Jonathan L. Feng, Sho Iwamoto +1
MSSM4G models, in which the minimal supersymmetric standard model is extended to include vector-like copies of standard model particles, are promising possibilities for weak-scale…
Physics at a 100 TeV pp collider: beyond the Standard Model phenomena
T. Golling, M. Hance, P. Harris +111
This report summarises the physics opportunities in the search and study of physics beyond the Standard Model at a 100 TeV pp collider.
Diphoton Signals from Colorless Hidden Quarkonia
Sho Iwamoto, Gabriel Lee, Yael Shadmi +1
We show that quarkonia-like states of a hidden SU(N) gauge group can account for the 750 GeV diphoton excess observed by ATLAS and CMS, even with constituents carrying standard mod…
LHC Benchmarks from Flavored Gauge Mediation
N. Ierushalmi, S. Iwamoto, G. Lee +2
We present benchmark points for LHC searches from flavored gauge mediation models, in which messenger-matter couplings give flavor-dependent squark masses. Our examples include spe…
Long-Lived Sleptons at the LHC and a 100 TeV Proton Collider
Jonathan L. Feng, Sho Iwamoto, Yael Shadmi +1
We study the prospects for long-lived charged particle (LLCP) searches at current and future LHC runs and at a 100 TeV pp collider, using Drell-Yan slepton pair production as an ex…