A. Tokiyasu

activity

20122026

K^{-} pp

bound state via

γ d \to K^{+} π^{-} X

reaction at

E_{γ} = 1.5 - 2.4

GeV

81 citations · 427 across the 22 of their papers we have counts for

collaborators

Showing 2026Show all

6 papers · 1 filter

nucl-ex2026

Hadron photoproduction experiments in LEPS2

N. Muramatsu, A. O. Tokiyasu, T. A. Hashimoto

In the LEPS2 facility constructed at SPring-8, hadron photoproduction experiments have been carried out by using a photon beam with high linear polarization in the tagged energy ra…

nucl-ex2026

Direct measurement of the in-medium $η^{'}$ mass spectrum through the $γ γ$ decay channel

Y. Matsumura, N. Muramatsu, T. A. Hashimoto +58

We measured the invariant mass of the $η^{'} (958)$ meson through the $η^{'} \to γ γ$ decay channel to search for possible character change of $η^{'}$ in a nuclear mediu…

nucl-ex2026

Evidence for a $K ˉ N N$ quasi-bound state in the $γ d \to K^{0} Λ p$ reaction

R. Kobayakawa, J. K. Ahn, S. Ajimura +34

The $γ d \to K^{0} Λ p$ reaction has been studied to search for a $K ˉ N N$ quasi-bound state using the LEPS2 solenoid spectrometer at SPring-8. A localized enhancement concentrated…

hep-ph2026

Probing keV mass QCD axions with the SACLA X-ray free electron laser

Charles Heaton, Jack W. D. Halliday, Taito Osaka +12

Axions are hypothetical particles, proposed to account for the invariance of CP symmetry in quantum chromodynamics. While axions and axion-like-particles are well-motivated by stri…

nucl-ex2026

Comprehensive measurement of $η^{'}$ photoproduction off the proton at $E_{γ} < 2.4$ $GeV$

N. Muramatsu, J. K. Ahn, W. C. Chang +61

For the spectroscopy of nucleon resonances at the total energies from the $η^{'}$ -meson production threshold to $2.32$ $GeV$ , photon beam asymmetries of the reaction $γ…

physics.acc-ph2026

First observation of the $γ$ -ray beam production by the backward Compton scattering of reflected synchrotron radiation in the extreme ultraviolet range

Norihito Muramatsu, Manabu Miyabe, Masahiro Okabe +8

Compton scattering of photons off high-energy electrons is a fundamental quantum mechanical process widely utilized to produce a $γ$ -ray beam for scientific research. Instead of in…

Hadron photoproduction experiments in LEPS2

Direct measurement of the in-medium η′ mass spectrum through the γγ decay channel

Evidence for a KˉNN quasi-bound state in the γd→K0Λp reaction

Probing keV mass QCD axions with the SACLA X-ray free electron laser

Comprehensive measurement of η′ photoproduction off the proton at Eγ​<2.4 GeV

First observation of the γ-ray beam production by the backward Compton scattering of reflected synchrotron radiation in the extreme ultraviolet range

Direct measurement of the in-medium $η^{'}$ mass spectrum through the $γ γ$ decay channel

Evidence for a $K ˉ N N$ quasi-bound state in the $γ d \to K^{0} Λ p$ reaction

Comprehensive measurement of $η^{'}$ photoproduction off the proton at $E_{γ} < 2.4$ $GeV$

First observation of the $γ$ -ray beam production by the backward Compton scattering of reflected synchrotron radiation in the extreme ultraviolet range