A5102922780- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
- Vascular anomalies and interventions
- Aortic aneurysm repair treatments
- Esophageal and GI Pathology
- Astronomical and nuclear sciences
- Abdominal vascular conditions and treatments
- Cardiac Arrest and Resuscitation
- Inorganic Fluorides and Related Compounds
- Poisoning and overdose treatments
- High-pressure geophysics and materials
- Muscle and Compartmental Disorders
- Cardiac, Anesthesia and Surgical Outcomes
- Graphite, nuclear technology, radiation studies
- Peripheral Artery Disease Management
- Atomic and Subatomic Physics Research
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Nuclear and radioactivity studies
- Quantum, superfluid, helium dynamics
Advanced Science Research Center
2022
Japan Atomic Energy Agency
2022
Kyoto University
2020-2022
RIKEN Nishina Center
2021
Kanazawa University
1994-1995
The differential cross sections of the Σ^{-}p→Λn reaction were measured accurately for Σ^{-} momentum (p_{Σ}) ranging from 470 to 650 MeV/c at J-PARC Hadron Experimental Facility. Precise angular information about was obtained first time by detecting approximately 100 events each step Δcosθ=0.1. show a slightly forward-peaking structure in regions. integrated -0.7≤cosθ≤1.0 as 22.5±0.68 [statistical error(stat.)] ±0.65 [systematic error(syst.)] mb and 15.8±0.83(stat)±0.52(syst)...
A high statistics $\mathrm{\ensuremath{\Sigma}}p$ scattering experiment is performed at the J-PARC Hadron Experimental Facility. Momentum-tagged ${\mathrm{\ensuremath{\Sigma}}}^{\ensuremath{-}}\mathrm{s}$ running in a liquid hydrogen target are accumulated by detecting ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}{K}^{+}{\mathrm{\ensuremath{\Sigma}}}^{\ensuremath{-}}$ reaction with intensity ${\ensuremath{\pi}}^{\ensuremath{-}}$ beam of 20 M/spill. The differential cross...
We conducted the coincidence measurement of $\alpha$ particles inelastically scattered from ${}^{20}$Ne at $0^{\circ}$ and decay charged in order to search for alpha-particle condensed state. compared measured excitation-energy spectrum branching ratio with statistical-decay-model calculations, found that newly observed states $E_x$ = 23.6, 21.8, 21.2 MeV are strongly coupled a candidate 4$\alpha$ state ${}^{16}$O. This result presents first strong evidence these candidates 5$\alpha$
The triple alpha reaction is one of the most important reactions in nuclear astrophysics. However, its rate high temperature environments at T9> 2 was still uncertain. One major origins uncertainty that radiative-decay probability 31− state 12C unknown. In present work, we have determined to be 1.3−1.1+1.2×10−6 by measuring 1H(12C,12Cp) for first time, and derived from measured probability. result suggests noticeably enhances although contribution had been assumed small.
A new hyperon-proton scattering experiment, dubbed J-PARC E40, was performed to measure differential cross sections of the Σ + p , − elastic scatterings and → Λ n by identifying a lot particles in momentum ranging from 0.4 0.8 GeV/ c produced π ± K reactions. We successfully measured these three channels with drastically improved accuracy fine angular step. These data will become important experimental constraints improve theories two-body baryon-baryon interactions. Following this success,...
The mini proceedings of the "Fourth International Workshop on Extension Project for J-PARC Hadron Experimental Facility (HEF-ex 2024) [https://kds.kek.jp/event/46965]" held at J-PARC, February 19-21, 2024, are presented. workshop was devoted to discussing physics case that connects both present and future covering a wide range topics in flavor, hadron, nuclear related experimental theoretical activities being conducted facility.
Abstract A high statistics ∑ p scattering experiment has been performed at the K1.8 beamline in J-PARC Hadron Experimental Facility. Data for momentum-tagged − beam running a liquid hydrogen target were accumulated by detecting <?CDATA ${\pi }_{}^{-}p\to {K}_{}^{+}{\sum }_{}^{-}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msubsup> <mml:mi>π</mml:mi> <mml:mrow /> <mml:mo>−</mml:mo> </mml:msubsup> <mml:mi>p</mml:mi> <mml:mo>→</mml:mo>...
We performed Ξ hypernuclear spectroscopy with the (K−, K+) reaction at J-PARC to investigate ΞN interaction (J-PARC E05). A new experiment E70) in which a better energy resolution could be achieved is now being prepared. In this article, an analysis status of E05 and preparation E70 are described.
In the K1.8 beam-line at Hadron Experimental Facility of J-PARC, a new magnetic spectrometer S-2S is being installed. was designed to achieve high momentum resolution Δ p / = 6 × 10 −4 in FWHM. Several strangeness-physics programs which require will be realized by S-2S. The present article introduces J-PARC E70 (missing-mass spectroscopy Ξ 12 Be) and E94 Λ 7 Li, B, C) experiments.
A high statistics $\Sigma p$ scattering experiment has been performed at the J-PARC Hadron Experimental Facility. Data for momentum-tagged $\Sigma^{-}$ running in a liquid hydrogen target were accumulated by detecting $\pi^{-}p \to K^{+}\Sigma^{-}$ reaction with intensity $\pi^{-}$ beam of 20 M/spill. Differential cross sections $\Sigma^{-}p$ elastic derived drastically improved accuracy identifying largest about 4,500 events from 1.72 $\times$ $10^{7}$ $\Sigma^{-}$. The differential section...
Abstract We performed a novel Σ+p scattering experiment at the J-PARC Hadron Experimental Facility. Approximately 2400 elastic events were identified from 4.9 × 107 tagged Σ+ particles in momentum range 0.44–0.80 GeV/c. The differential cross sections of derived with much better precision than previous experiments. obtained approximately 2 mb/sr or less, which not as large those predicted by fss2 and FSS models based on quark cluster model short-range region. By performing phase-shift...
We are planning to carry out a high-resolution spectroscopy of Ξ hypernucleus at the J-PARC K1.8 beamline, which provides highintensity K − beam (J-PARC E70 experiment). The aims be realized by introducing new magnetic spectrometer S-2S and an active fiber target AFT. In this article, role AFT in experiment its development status described.
We present a new proposal, J-PARC E90, to measure missing-mass spectrum near the Σ N threshold for d ( K − , π ) reactions at 1.4 GeV/ c . While many previous experiments support apparent enhancement ΣN thresh-old, dynamical origin of this so-called “Σ cusp” remains yet unsolved. The suggests either cusp structure or weakly bound state. One keys making it clear is improving resolution and statistics. Our experiment can achieve 0.4 MeV in σ using K1.8 beam line S-2S spectrometers J-PARC....
X-ray spectroscopy of hadronic atoms is a powerful method to study strong interaction between hadrons and nuclei. At J-PARC, we have conducted two experiments, J-PARC E07 E03, for with doubly strange hyperon, Ξ − , aiming at the world-first detection their X-rays. The first measurement performed as byproduct experiment hybrid emulsion technique. second one, dedicated Fe atom X rays. preliminary results present status E03 are shown in this article. Future prospects -atomic also discussed. A...
J-PARC E70 experiment measures the missing-mass of Ξ hypernuclei ( 12 Be ) in Hadron Experimental Facility at J-PARC. We aim to reach best resolution 2 MeV/ c FWHM with a new magnetic spectrometer S-2S. The high-resolution spectroscopy will play an important role understand unknown ΞN interaction. start beginning 2023. This article presents preparation status.
A part of the experiment was performed in 2018 and 2019 J-PARC. As a result analyzing collected data, \(\Sigma ^{ - }\) production }p\) scattering reaction have been identified. It means that our new measurement analysis method are successfully working well. Analysis for deriving differential cross section p\) is on going.
The π -p → K 0 Λ reaction is an important elementary process to produce from a proton target and key for Λp scattering experiment where the momentum of should be tagged missing (π -, ) reaction.However, spectroscopy method has not been established yet due difficulty detection.Therefore, we have proposed new detection + -from decay are measured by forward magnetic spectrometer detector cluster surrounding target, respectively.The feasibility was confirmed analyzing J-PARC E40 data taken with...
心筋梗塞は腹部大動脈瘤の術中術後の合併症で最も重篤なものの一つである. ジピリダモール負荷心筋スキャン, 冠状動脈造影により評価を行い, 必要な症例には冠状動脈再建を行う方針を開始した1983年以降と, それ以前の腹部大動脈瘤の待機手術例を比較検討した. 1982年までの前半の10年間の症例は25例で術前併存症としての虚血性心疾患を1例に認めた. 1983年以降の後半の10年間の症例は85例で, 術前併存症としての虚血性心疾患を14例に認め, 全例冠状動脈造影にて評価した. 後半において高血圧や高脂血症などの危険因子もしくは心電図異常を認める32例にジピリグモール負荷心筋スキャン等を施行し, うち8例に冠状動脈造影を施行した. 前半の25例において術後心筋梗塞を2例に認め, うち1例が死亡した. 後半の85例中5例に冠状動脈バイパスを施行した. 後半の85例において術後心筋梗塞は認めなかった. 腹部大動脈瘤手術では積極的な虚血性心疾患対策が必要である.
We experiened a case of hepatic arterial aneurysm which bursted into the common bile duct in patient with aortic dissection. A 58-year-old male who had been treated conservatively for dissection was admitted to hospital because sudden onset hematemesis and abdominal pain. Arteriography confirmed an left artery, then transcatheter embolization (TAE) performed using steel-coils. Seven months after embolization, aneurysm-bile fistula reopened through collateral circulation. The transecatheter...
Simultaneous revascularization of aortoiliac and femoropopliteal occlusion was performed in 21 limbs with severe ischemia 19 patients. The average age the patients 67.8 years. All were males, had arteriosclerosis obliterans. Patients suffered from rest pain 14 limbs, ulcer -gangrene 7. Aortoiliac operations included aortofemoral bypass 13, extra anatomic 8 limbs. Femoropopliteal saphenous vein 10, artificial graft 11 recovered claudication 5 without symptoms 16. Primary patency rate at years...