48 citations · 343 across the 26 of their papers we have counts for
26 papers
Dark Matter emission at Belle II and NA62 in Minimal Flavor Violation framework
Federico Mescia, Shohei Okawa, Joel Swallow +1
Minimal Flavor Violation (MFV) provides a compelling framework for exploring physics beyond the Standard Model, in which new QCD-singlet fields transforming under the global $\math…
Novel bounds on neutrino portal dark matter from leptonic meson decays
Shohei Okawa, Yuji Omura
We investigate the potential of leptonic meson decays , where is a pseudo-scalar meson, as a probe of neutrino portal dark matter. The model of our focus…
Dirac neutrino and dark matter in left-right symmetric models
Shohei Okawa, Yuji Omura, Keyun Wu
We study neutrino mass generation and dark matter in a left-right symmetric model. The model is based on an gauge theory wi…
Multi-Component Dark Matter from Minimal Flavor Violation
Federico Mescia, Shohei Okawa, Keyun Wu
Minimal Flavor Violation (MFV) offers an appealing framework for exploring physics beyond the Standard Model. Interestingly, within the MFV framework, a new colorless field that tr…
New Constraints on Gauged U(1) Models via Mixing
Kento Asai, Coh Miyao, Shohei Okawa +1
It is known that the model based on U(1) gauge symmetry can explain not only the discrepancy between the measured value of muon and the theoretical prediction, bu…
Light mass window of inert doublet dark matter with lepton portal interaction
Ryo Higuchi, Syuhei Iguro, Shohei Okawa +1
We study phenomenology of a light scalar dark matter (DM). In the model, there are an inert doublet scalar and a singlet Dirac fermion , both charged under a global symmet…
A window onto leptoquarks?
Matthew Kirk, Shohei Okawa, Keyun Wu
Upcoming neutrino telescopes promise a new window onto the interactions of neutrinos with matter at ultrahigh energies (- GeV), and the possibility to detect de…
Running effects on QCD axion phenomenology
Luca Di Luzio, Maurizio Giannotti, Federico Mescia +3
We study the impact of renormalization group effects on QCD axion phenomenology. Focusing on the DFSZ model, we argue that the relevance of running effects for the axion couplings…
Light lepton portal dark matter meets the LHC
Syuhei Iguro, Shohei Okawa, Yuji Omura
We examine the sensitivity of the Large Hadron Collider (LHC) to light lepton portal dark matter with its mass below 10GeV. The model features an extra doublet scalar field and…
Renormalization group effects in astrophobic axion models
Luca Di Luzio, Federico Mescia, Enrico Nardi +1
It has been recently pointed out that in certain axion models it is possible to suppress simultaneously both the axion couplings to nucleons and electrons, realising the so-called…
Scalar Dark Matter with a Flavored Mediator
Kento Asai, Coh Miyao, Shohei Okawa +1
We study a renormalizable scalar singlet dark matter model based on lepton flavor symmetry. A -philic scalar doublet is introduced to explain the discrepancy between the…
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…
Importance of vector leptoquark-scalar box diagrams in Pati-Salam unification with vector-like families
Syuhei Iguro, Junichiro Kawamura, Shohei Okawa +1
We study lepton flavor violating meson decays induced by box diagrams involving a vector leptoquark (LQ) and scalar fields in Pati-Salam (PS) unification with vector-like families.…
Long-range axion forces and hadronic CP violation
Shohei Okawa, Maxim Pospelov, Adam Ritz
Axions and other pseudoscalar fields comprise an interesting class of ultralight dark matter candidates, that may independently play a role in solving the strong problem. In t…
TeV-scale vector leptoquark from Pati-Salam unification with vectorlike families
Syuhei Iguro, Junichiro Kawamura, Shohei Okawa +1
In this paper, we show an explicit way to realize a TeV-scale vector leptoquark from the Pati-Salam (PS) unification with extra vectorlike families. The leptoquark mass is constrai…
Light mass window of lepton portal dark matter
Shohei Okawa, Yuji Omura
We explore a novel possibility that dark matter has a light mass below 1GeV in a lepton portal dark matter model. There are Yukawa couplings involving dark matter, left-handed lept…
Search for U(1) charged Dark Matter with neutrino telescope
Kento Asai, Shohei Okawa, Koji Tsumura
We study a simple Dirac fermion dark matter model in U(1) theory. The new light gauge boson plays important roles in both dark matter physics and the explanation fo…
Current status and muon explanation of lepton portal dark matter
Junichiro Kawamura, Shohei Okawa, Yuji Omura
In this paper, we summarize phenomenology in lepton portal dark matter (DM) models, where DM couples to leptons and extra leptons/sleptons. There are several possible setups: compl…
Electric Dipole Moments From Dark Sectors
Shohei Okawa, Maxim Pospelov, Adam Ritz
We examine the sensitivity of electric dipole moments (EDMs) to new -violating physics in a hidden (or dark) sector, neutral under the Standard Model (SM) gauge groups, and cou…
WIMP dark matter in the parity solution to the strong CP problem
Junichiro Kawamura, Shohei Okawa, Yuji Omura +1
We extend the Standard Model (SM) with parity symmetry, motivated by the strong CP problem and dark matter. In our model, parity symmetry is conserved at high energy by introducing…
Impact of the anomalies on dark matter physics
Junichiro Kawamura, Shohei Okawa, Yuji Omura
Recently, the LHCb collaboration has reported the excesses in the processes. One of the promising candidates for new physics to explain the anomalies is the extended S…
Hidden sector behind the CKM matrix
Shohei Okawa, Yuji Omura
The small quark mixing, described by the Cabibbo-Kobayashi-Maskawa (CKM) matrix in the Standard Model, may be a clue to reveal new physics around the TeV scale. We consider a simpl…
Scalegenesis via dynamically induced multiple seesaws
Hiroyuki Ishida, Shinya Matsuzaki, Shohei Okawa +1
We propose a model which accounts for the dynamical origin of the electroweak symmetry breaking (EWSB), directly linking to the mass generation of dark matter (DM) candidate and ac…
Dark matter physics, flavor physics and LHC constraints in the dark matter model with a bottom partner
Tomohiro Abe, Junichiro Kawamura, Shohei Okawa +1
In the scenario that a dark matter (DM) is a weakly interacting massive particle, there are many possibilities of the interactions with the Standard Model (SM) particles to achieve…