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Journal Articles

Precise lifetime measurement of $$^4_Lambda$$H hypernucleus using in-flight $$^4$$He$$(K^-, pi^0)^4_Lambda$$H reaction

Akaishi, Takaya; Hashimoto, Tadashi; Tanida, Kiyoshi; 35 of others*

Physics Letters B, 845, p.138128_1 - 138128_4, 2023/10

https://doi.org/10.1016/j.physletb.2023.138128
 Times Cited Count：1 Percentile：68.16(Astronomy & Astrophysics)

Journal Articles

Chiral symmetry restoration at high matter density observed in pionic atoms

Nishi, Takahiro*; Hashimoto, Tadashi; 46 of others*

Nature Physics, 19(6), p.788 - 793, 2023/06

https://doi.org/10.1038/s41567-023-02001-x
 Times Cited Count：3 Percentile：80.44(Physics, Multidisciplinary)

Journal Articles

Proof-of-principle experiment for testing strong-field quantum electrodynamics with exotic atoms; High precision X-ray spectroscopy of muonic neon

Okumura, Takuma*; Hashimoto, Tadashi; 40 of others*

Physical Review Letters, 130(17), p.173001_1 - 173001_7, 2023/04

https://doi.org/10.1103/PhysRevLett.130.173001
 Times Cited Count：1 Percentile：83.24(Physics, Multidisciplinary)

Journal Articles

High-sensitive XANES analysis at Ce L$$_{2}$$-edge for Ce in bauxites using transition-edge sensors; Implications for Ti-rich geological samples

Li, W.*; Yamada, Shinya*; Hashimoto, Tadashi; Okumura, Takuma*; Hayakawa, Ryota*; Nitta, Kiyofumi*; Sekizawa, Oki*; Suga, Hiroki*; Uruga, Tomoya*; Ichinohe, Yuto*; et al.

Analytica Chimica Acta, 1240, p.340755_1 - 340755_9, 2023/02

https://doi.org/10.1016/j.aca.2022.340755
 Times Cited Count：2 Percentile：31.9(Chemistry, Analytical)

no abstracts in English

Journal Articles

Pole position of $$Lambda(1405)$$ measured in $$d(K^-,n)piSigma$$ reactions

Aikawa, Shu*; Hashimoto, Tadashi; Tanida, Kiyoshi; 73 of others*

Physics Letters B, 837, p.137637_1 - 137637_8, 2023/02

https://doi.org/10.1016/j.physletb.2022.137637
 Times Cited Count：0 Percentile：0.02(Astronomy & Astrophysics)

Journal Articles

Measurements of strong-interaction effects in kaonic-helium isotopes at sub-eV precision with X-ray microcalorimeters

Hashimoto, Tadashi; Tanida, Kiyoshi; 68 of others*

Physical Review Letters, 128(11), p.112503_1 - 112503_6, 2022/03

https://doi.org/10.1103/PhysRevLett.128.112503
 Times Cited Count：6 Percentile：78.27(Physics, Multidisciplinary)

Journal Articles

Dynamical response of transition-edge sensor microcalorimeters to a pulsed charged-particle beam

Okumura, Takuma*; Azuma, Toshiyuki*; Bennet, D. A.*; Caradonna, P.*; Chiu, I.-H.*; Doriese, W. B.*; Durkin, M. S.*; Fowler, J. W.*; Gard, J. D.*; Hashimoto, Tadashi; et al.

IEEE Transactions on Applied Superconductivity, 31(5), p.2101704_1 - 2101704_4, 2021/08

https://doi.org/10.1109/TASC.2021.3067793
 Times Cited Count：1 Percentile：11.15(Engineering, Electrical & Electronic)

A superconducting transition-edge sensor (TES) microcalorimeter is an ideal X-ray detector for experiments at accelerator facilities because of good energy resolution and high efficiency. To study the performance of the TES detector with a high-intensity pulsed charged-particle beam, we measured X-ray spectra with a pulsed muon beam at the Japan Proton Accelerator Research Complex (J-PARC) in Japan. We found substantial temporal shifts of the X-ray energy correlated with the arrival time of the pulsed muon beam, which was reasonably explained by pulse pileup due to the incidence of energetic particles from the initial pulsed beam.

Journal Articles

Deexcitation dynamics of muonic atoms revealed by high-precision spectroscopy of electronic $$K$$ X rays

Okumura, Takuma*; Azuma, Toshiyuki*; Bennet, D. A.*; Caradonna, P.*; Chiu, I. H.*; Doriese, W. B.*; Durkin, M. S.*; Fowler, J. W.*; Gard, J. D.*; Hashimoto, Tadashi; et al.

Physical Review Letters, 127(5), p.053001_1 - 053001_7, 2021/07

https://doi.org/10.1103/PhysRevLett.127.053001
 Times Cited Count：13 Percentile：79.44(Physics, Multidisciplinary)

We observed electronic $$K$$X rays emitted from muonic iron atoms using a superconducting transition-edge-type sensor microcalorimeter. The energy resolution of 5.2 eV in FWHM allowed us to observe the asymmetric broad profile of the electronic characteristic $$K$$$$alpha$$ and $$K$$$$beta$$ X rays together with the hypersatellite $$K$$$$alpha$$ X rays around 6 keV. This signature reflects the time-dependent screening of the nuclear charge by the negative muon and the $$L$$-shell electrons, accompanied by electron side-feeding. Assisted by a simulation, this data clearly reveals the electronic $$K$$- and $$L$$-shell hole production and their temporal evolution during the muon cascade process.

Journal Articles

First observation of a nuclear $$s$$-state of a $$Xi$$ hypernucleus, $$^{15}_{Xi}{rm C}$$

Yoshimoto, Masahiro*; Fujita, Manami; Hashimoto, Tadashi; Hayakawa, Shuhei; Ichikawa, Yudai; Ichikawa, Masaya; Imai, Kenichi*; Nanamura, Takuya; Naruki, Megumi; Sako, Hiroyuki; et al.

Progress of Theoretical and Experimental Physics (Internet), 2021(7), p.073D02_1 - 073D02_19, 2021/07

https://doi.org/10.1093/ptep/ptab073
 Times Cited Count：13 Percentile：81.3(Physics, Multidisciplinary)

Journal Articles

J-PARC E07; Systematic study of double strangeness system with hybrid emulsion method

Yoshida, Junya; Akaishi, Takaya; Fujita, Manami; Hasegawa, Shoichi; Hashimoto, Tadashi; Hosomi, Kenji; Ichikawa, Masaya; Ichikawa, Yudai; Imai, Kenichi*; Kim, S.; et al.

JPS Conference Proceedings (Internet), 33, p.011112_1 - 011112_8, 2021/03

https://doi.org/10.7566/JPSCP.33.011112

Journal Articles

Observation of Coulomb-assisted nuclear bound state of $$Xi^-$$-$$^{14}$$N system

Hayakawa, Shuhei; Fujita, Manami; Hasegawa, Shoichi; Hashimoto, Tadashi; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi*; Nanamura, Takuya; Naruki, Megumi; Sako, Hiroyuki; et al.

Physical Review Letters, 126(6), p.062501_1 - 062501_6, 2021/02

https://doi.org/10.1103/PhysRevLett.126.062501
 Times Cited Count：34 Percentile：95.34(Physics, Multidisciplinary)

Journal Articles

Observation of a $$bar{K}NN$$ bound state in the $$^{3}$$He $$(K^-, Lambda p)n$$ reaction

Yamaga, Takumi*; Hashimoto, Tadashi; Tanida, Kiyoshi; 66 of others*

Physical Review C, 102(4), p.044002_1 - 044002_14, 2020/10

https://doi.org/10.1103/PhysRevC.102.044002
 Times Cited Count：17 Percentile：88.31(Physics, Nuclear)

Journal Articles

$$K^-pp$$ bound system at J-PARC

Sakuma, Fuminori*; Hashimoto, Tadashi; Tanida, Kiyoshi; 66 of others*

AIP Conference Proceedings 2249, p.020005_1 - 020005_10, 2020/07

https://doi.org/10.1063/5.0008808
 Times Cited Count：1 Percentile：69.1(Physics, Applied)

Journal Articles

$$bar{K}$$-nuclear bound state at J-PARC

Sakuma, Fuminori*; Hashimoto, Tadashi; Tanida, Kiyoshi; 66 of others*

JPS Conference Proceedings (Internet), 32, p.010088_1 - 010088_8, 2020/07

https://doi.org/10.7566/JPSCP.32.010088

Journal Articles

Results of $$bar{K}NN$$ search via the $$(K^-, n)$$ reaction at J-PARC

Yamaga, Takumi*; Hashimoto, Tadashi; Tanida, Kiyoshi; 66 of others*

JPS Conference Proceedings (Internet), 26, p.023008_1 - 023008_6, 2019/11

https://doi.org/10.7566/JPSCP.26.023008

Journal Articles

$$Lambda(1405)$$ spectroscopy via the in-flight $$d(K^-, n)$$ reaction at the J-PARC K1.8BR

Kawasaki, Shingo*; Hashimoto, Tadashi; Tanida, Kiyoshi; 72 of others*

JPS Conference Proceedings (Internet), 26, p.022009_1 - 022009_5, 2019/11

https://doi.org/10.7566/JPSCP.26.022009

Journal Articles

Spectroscopic study of the $$Lambda$$(1405) resonance via the $$d(K^-, n)$$ reaction at J-PARC

Asano, Hidemitsu*; Hashimoto, Tadashi; Tanida, Kiyoshi; 72 of others*

AIP Conference Proceedings 2130, p.040018_1 - 040018_6, 2019/07

https://doi.org/10.1063/1.5118415
 Times Cited Count：3 Percentile：82.33(Physics, Nuclear)

Journal Articles

"$$K^-pp$$", a $$bar K$$-meson nuclear bound state, observed in $$^3$$He($$K^-,Lambda p)n$$ reactions

Hashimoto, Tadashi; Tanida, Kiyoshi; 67 of others*

Physics Letters B, 789, p.620 - 625, 2019/02

https://doi.org/10.1016/j.physletb.2018.12.058
 Times Cited Count：33 Percentile：95.08(Astronomy & Astrophysics)

We observed a distinct peak in the $$Lambda p$$ invariant mass spectrum of $$^{3}{rm He}(K^-, , Lambda p)n$$, well below $$m_K + 2m_p$$, $$i.e.$$, the mass threshold of the $$K^-$$ to be bound to two protons. By selecting a relatively large momentum-transfer region $$q = 350 sim650$$ MeV/$$c$$, one can clearly separate the peak from the quasi-free process,$$overline{K}N rightarrow overline{K}N$$ followed by the non-resonant absorption by the non-resonant absorption by the two spectator-nucleons $$overline{K}NN rightarrow Lambda N$$. We found that the simplest fit to the observed peak gives us a Breit-Wignerpole position at $$B_{rm {it Kpp}} = 47 pm 3 , (stat.) ,^{+3}_{-6},(sys.)$$ MeV having a width $$Gamma_{rm {it Kpp}} = 115 pm 7 , (stat.),^{+10}_{-20} ,(sys.)$$ MeV, and the $$S$$-wave Gaussian reaction form-factor parameter $$Q_{rm {it Kpp}} = 381 pm 14 , (stat.),^{+57}_{-0} ,(sys.)$$MeV/$$c$$, as a new form of the nuclear bound system with strangeness -"$$K^-pp$$".

Journal Articles

Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment

Ekawa, Hiroyuki; Ashikaga, Sakiko; Hasegawa, Shoichi; Hashimoto, Tadashi; Hayakawa, Shuhei; Hosomi, Kenji; Ichikawa, Yudai; Imai, Kenichi; Kimbara, Shinji*; Nanamura, Takuya; et al.

Progress of Theoretical and Experimental Physics (Internet), 2019(2), p.021D02_1 - 021D02_11, 2019/02

https://doi.org/10.1093/ptep/pty149
 Times Cited Count：25 Percentile：83.76(Physics, Multidisciplinary)

Journal Articles

Kaonic-atom X-ray spectroscopy with superconducting microcalorimeters

Hashimoto, Tadashi; Tanida, Kiyoshi; 45 of others*

JPS Conference Proceedings (Internet), 17, p.072001_1 - 072001_4, 2017/07

https://doi.org/10.7566/JPSCP.17.072001

52 (Records 1-20 displayed on this page)