http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hypernuclear Physics in the S=-1 Sector
O. Hashimoto 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.43 No.I
Hypernuclear physics in the $S=-1$ sector, particularly its spectroscopic study, has made significant progress in recent years. Spectroscopy as a tool to investigate $\Lambda$ hypernuclear structure and $\Lambda$N interaction is discussed referring recent spectroscopic data; hypernuclear mass spectra through the \pikr~using a large acceptance high resolution spectrometer (SKS) at KEK 12 GeV PS, hypernuclear $\gamma$ ray spectroscopy in which precision information on the spin dependent $\Lambda$N interaction can be extracted. In addition, a new high-precision reaction spectroscopy experiment by the ($e,e'K^+$) reaction (Jlab E89-009), and the experiment under preparation with a high-resolution kaon spectrometer (HKS) under construction, which is expected to realize the ($e,e'K^+$) reaction spectroscopy with more than 50 times higher efficiency and twice better resolution [3--400 keV (FWHM)]. The future prospect of hypernuclear physics is discussed based on these recent development.
MECHANISMS OF THE NONMESONIC WEAK DECAY OF Λ HYPERNUCLEI AND THE THREE-BODY PROCESS
BHANG, H.,AJIMURA, S.,AOKI, K.,BANU, A.,FUKUDA, T.,HASHIMOTO, O.,HWANG, J. I.,KAMEOKA, S.,KANG, B. H.,KIM, E.,KIM, J. H.,KIM, M.,MARUTA, T.,MIURA, Y.,MIYAKE, Y.,NAGAE, T.,NAKAMURA, M.,NAKAMURA, S. N. World Scientific 2009 Modern Physics Letters A Vol.24 No.11
<P> The long standing Γn/Γp puzzle of NMWD has finally been solved recently. It appears that the reason behind the puzzle was the universal quenching of nucleon yields from the prediction of one-nucleon induced (1N-) NMWD. We have shown that the quenching of nucleon yields can be explained only when we include a fairly large contribution of the three-body process (Γ2N) in Γnm. </P>
The Weak Decay Widths of ?? Hypernuclei
Bhang, H.,Ajimura, S.,Aoki, K.,Banu, A.,Fukuda, T.,Hashimoto, O.,Hwang, J. I.,Kameoka, S.,Kang, B. H.,Kim, E.,Kim, J. H.,Maruta, T.,Miura, Y.,Miyake, Y.,Nagae, T.,Nakamura, M.,Nakamura, S. N.,Noumi, H Korean Physical Society 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.2
The Weak Decay Widths of Λ Hypernuclei
H. Bhang,S. Ajimura,K. Aoki,A. Banu,T. Fukuda,O. Hashimoto,J. I. Hwang,S. Kameoka,B. H. Kang,E. Kim,김정호,T. Maruta,Y. Miura,Y. Miyake,T. Nagae,M. Nakamura,S. N. Nakamura,H. Noumi,S. Okada,Y. Okayasu,H. 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
We have measured both the mesonic and nonmesonic weak decay widths of ^(12)_ΛC. For the mesonic decay, we have improved the accuracy of Γ_π^0 so that it reduced the error of Γ_(nm) from ≥10% to ≤5%. For the nonmesonic decay, we have solved the long standing Γ_n/Γ_p puzzle by measuring the ratio 0.51 ± 0.14 in the exclusive measurement. At the same time we have measured the width of the 3-body nonmesonic decay Γ_(2N) = 0.27 ± 0.13 for the first time. Combining the accurate Γ_n/Γ_p ratio and the first measured value Γ_(2N), we have finally obtained the Γ_n and Γ_p themselves taking account of the 3-body process. We have measured all the weak decay widths of _(12)_ΛC so that it provides the first complete set of widths for the investigation of ΔS = 1 baryon-baryon weak interaction.
Mesonic and nonmesonic weak decay widths of medium-heavy <tex> $ \Lambda $</tex> hypernuclei
Sato, Y.,Ajimura, S.,Aoki, K.,Bhang, H.,Hasegawa, T.,Hashimoto, O.,Hotchi, H.,Kim, Y. D.,Kishimoto, T.,Maeda, K.,Noumi, H.,Ohta, Y.,Omata, K.,Outa, H.,Park, H.,Sekimoto, M.,Shibata, T.,Takahashi, T.,Y American Physical Society 2005 PHYSICAL REVIEW C - Vol.71 No.2
Neutron and proton energy spectra from the non-mesonic weak decays of HeΛ5 and CΛ12
Okada, S.,Ajimura, S.,Aoki, K.,Banu, A.,Bhang, H.C.,Fukuda, T.,Hashimoto, O.,Hwang, J.I.,Kameoka, S.,Kang, B.H.,Kim, E.H.,Kim, J.H.,Kim, M.J.,Maruta, T.,Miura, Y.,Miyake, Y.,Nagae, T.,Nakamura, M.,Nak Elsevier 2004 Physics letters: B Vol.597 No.3
<P><B>Abstract</B></P><P>We have simultaneously measured the energy spectra of neutrons and protons emitted in the non-mesonic weak decays of HeΛ5 and CΛ12 hypernuclei produced via the (<SUP>π+</SUP>,<SUP>K+</SUP>) reaction with much higher statistics than those of previous experiments. The neutron-to-proton yield ratios for both hypernuclei at a high energy threshold (60 MeV) were approximately equal to two, which suggests that the ratio of the neutron- and proton-induced decay channels, <SUB>Γn</SUB>(Λn→nn)/<SUB>Γp</SUB>(Λp→np), is about 0.5. In the neutron energy spectra, we found that the yield of the low-energy component is unexpectedly large, even for HeΛ5.</P>