101 citations · 841 across the 69 of their papers we have counts for
19 papers · 1 filter
Disentangling new physics with quantum entanglement in production at future lepton colliders
Masato Arai, Kentarou Mawatari, Nobuchika Okada
We investigate quantum entanglement and Bell-inequality violation in top-antitop pair production at future lepton colliders such as the International Linear Collider (ILC) and mult…
Higgs-Portal Dark Matter in Nonlinear MSSM
Masato Arai, Nobuchika Okada
Supersymmetric (SUSY) extension of the Standard Model (SM) is a primary candidate for new physics beyond the SM. If SUSY breaking scale is very low, for example, the multi-TeV rang…
Localization of the Standard Model via Higgs mechanism and a finite electroweak monopole from non-compact five dimensions
Masato Arai, Filip Blaschke, Minoru Eto +1
We propose a minimal and self-contained model in non-compact flat five dimensions which localizes the Standard Model (SM) on a domain wall. Localization of gauge fields is achieved…
Thermal Inflation with Flaton Chemical Potential
Masato Arai, Yoshishige Kobayashi, Nobuchika Okada +1
Thermal inflation driven by a scalar field called "flaton" is a possible scenario to solve the cosmological moduli problem. We study a model of thermal inflation with a flaton chem…
Supersymmetric B-L inflation near the conformal coupling
Masato Arai, Shinsuke Kawai, Nobuchika Okada
We investigate a novel scenario of cosmological inflation in a gauged extended minimal supersymmetric Standard Model with R-symmetry. We use a noncanonical Kähler potential a…
Kaluza-Klein gluon searches using the three-b-jet decay channel at the Large Hadron Collider
Masato Arai, Gi-Chol Cho, Karel Smolek
We study observability of a Kaluza-Klein (KK) excitation of a gluon in a five-dimensional model with a warped geometry at the Large Hadron Collider. In this model, the Standard Mod…
Sensitivity of the LHC to Kaluza-Klein gluon in two b-jets decay channel
Masato Arai, Gi-Chol Cho, Karel Smolek +1
We study a possibility of observation of the first Kaluza-Klein (KK) excitation of gluon in a warped extra dimension model at the LHC. In our analysis, we adopt the KK gluon mass a…
Higgs-lepton inflation in the supersymmetric minimal seesaw model
Masato Arai, Shinsuke Kawai, Nobuchika Okada
We investigate a scenario of cosmological inflation realised along a flat direction of the minimal seesaw model embedded in supergravity with a noncanonical R-parity violating Kähl…
LHC sensitivity to Kalzua-Klein gluon in two b-jets decay channel
Masato Arai, Gi-Chol Cho, Karel Smolek +1
We examine a possibility to discover a Kaluza-Klein (KK) excitation of gluon in a warped extra dimension model at the Large Hadron Collider focusing on a decay channel of the KK gl…
Supersymmetric standard model inflation in the Planck era
Masato Arai, Shinsuke Kawai, Nobuchika Okada
We propose a cosmological inflationary scenario based on the supergravity-embedded Standard Model supplemented by the right-handed neutrinos. We show that with an appropriate Kahle…
Higgs inflation in minimal supersymmetric SU(5) GUT
Masato Arai, Shinsuke Kawai, Nobuchika Okada
The Standard Model Higgs boson with large nonminimal coupling to the gravitational curvature can drive cosmological inflation. We study this type of inflationary scenario in the co…
Renormalization effects on the MSSM from a calculable model of a strongly coupled hidden sector
Masato Arai, Shinsuke Kawai, Nobuchika Okada
We investigate possible renormalization effects on the low-energy mass spectrum of the minimal supersymmetric standard model (MSSM), using a calculable model of strongly coupled hi…
Single production of sleptons with polarized tops at the Large Hadron Collider
Masato Arai, Katri Huitu, Santosh Kumar Rai +1
We study the production of a single charged slepton in association with a top quark in a R-parity violating supersymmetric model with lepton number violating interactions at the La…
A gauge mediation scenario with hidden sector renormalization in MSSM
Masato Arai, Shinsuke Kawai, Nobuchika Okada
We study the hidden sector effects to the mass renormalization of a simplest gauge-mediated supersymmetry breaking scenario. We point out that possible hidden sector contributions…
Effects of unparticle on top spin correlation at the Large Hadron Collider
Masato Arai, Nobuchika Okada, Karel Smolek
We study effects of the scale invariant hidden sector, unparticle, proposed by Georgi, on top spin correlation at the Large Hadron Collider. Assuming no flavor changing interaction…
Influence of Z' boson on top quark spin correlations at the LHC
Masato Arai, Nobuchika Okada, Karel Smolek +1
We study top-antitop pair production and top spin correlations in a model with an electrically neutral massive gauge boson, Z', at the Large Hadron Collider. In addition to the Sta…
Top quark spin correlations in the Randall-Sundrum model at the CERN Large Hadron Collider
Masato Arai, Nobuchika Okada, Karel Smolek +1
In the Randall-Sundrum model, we study top-antitop pair production and top spin correlations at the Large Hadron Collider. In addition to the Standard Model processes, there is a n…
Top Spin Correlations in Theories with Large Extra-Dimensions at the Large Hadron Collider
Masato Arai, Nobuchika Okada, Karel Smolek +1
In theories with large extra dimensions, we study the top spin correlations at the Large Hadron Collider. The s-channel process mediated by graviton Kaluza-Klein modes contributes…
Superheavy Dark Matter and Parametric Resonance
Masato Arai, Hideaki Hiro-Oka, Nobuchika Okada +1
We propose a new scenario to produce the superheavy dark matter based on the inflationary universe. In our scenario, the inflaton couples to both a boson and a stable fermion. Alth…