Production of Neutron-Rich Lambda Hypernuclei at J-PARC (2009)
Sakaguchi, A., Ajimura, S., Bhang, H., Busso, L., Endo, M., Faso, D., ...
We discuss the usefulness of the double charge-exchange reactions (DCX) for the production of the neutron-rich Lambda-hypernuclei. We believe the (pi-,K+) reaction is one of the most promising DCX...
$\Lambda N$ correlations from the stopped $K^-$ reaction on ${}^4$He (2007)
Suzuki, T., Bhang, H., Chiba, J., Choi, S., Fukuda, Y., Hanaki, T., ...
We have investigated correlations of coincident $\Lambda N$ pairs from the stopped $K^-$ reaction on ${}^4$He, and clearly observed $\Lambda p$ and $\Lambda n$ branches of the two-nucleon absorption...
H. Bhang, H. Park, J. H. Kim, Y. D. Kim, M. Youn, O. Hashimoto, ...
Through the last 7-8 years of collaboration with the SKS hypernuclear physics group at KEK, we have concentrated on the measurement of hypernuclear decays. Non-mesonic weak decay mode of hypernucleus...
$\Lambda d$ correlations from the $^4$He(stopped-$K^-$,$d$) reaction (2007)
Suzuki, T., Bhang, H., Chiba, J., Choi, S., Fukuda, Y., Hanaki, T., ...
We have observed an intense high-energy component in an inclusive $^4$He(stopped $K^-$, $d$) spectrum. For back-to-back $\Lambda d$ pairs a prominent event cluster has been found just below the...
Search for strange tribaryon states in the inclusive ^4He(K^{-}_{stopped}, p) reaction (2007)
Sato, M., Bhang, H., Chiba, J., Choi, Seonho, Fukuda, Y., Hanaki, T., ...
A search for tribaryon states was performed at KEK-PS. We adopted the $^4$He($K^-_{stopped}, p)$ reaction to populate the states with strangeness -1, charge 0 and isospin 1. No significant narrow...
Precision measurement of the $3d \to 2p$ x-ray energy in kaonic $^4$He (2007)
Okada, S., Beer, G., Bhang, H., Cargnelli, M., Chiba, J., Choi, Seonho, ...
We have measured the Balmer-series x-rays of kaonic $^4$He atoms using novel large-area silicon drift x-ray detectors in order to study the low-energy $\bar{K}$-nucleus strong interaction. The energy...
Search for a kaonic nuclear state via $^4$He$(K^-, N)$ (2007)
Iwasaki, M., Bhang, H., Chiba, J., Choi, S., Fukuda, Y., Hanaki, T., ...
Very recently, we have performed a couple of experiments, {\it{KEK PS-E549/E570}}, for the detailed study of the strange tribaryon $S^0(3115)$ obtained in {\it{KEK PS-E471}}. These experiments were...
Deuteron and Anti-deuteron Production in $e^+ e^-$ Collisions at the Z Resonance (2006)
Schael, S, Aubert, B, Zalipska, J, Yoshida, M, Yoo, J, Yokoyama, M, ...
Deuteron and anti-deuteron production in Z decays has been observed in the ALEPH experiment at LEP. The production rate of anti-deuterons is measured to be 5.9+-1.8+-0.5 10^-6 per hadronic Z decay in...
Coincidence Measurement of the Nonmesonic Weak Decay of ^{12}_{Lambda}C (2006)
Kim, M. J., Ajimura, S., Aoki, K., Banu, A., Bhang, H., Fukuda, T., ...
We have measured the angular correlation of the pair nucleons np and nn emitted from the nonmesonic weak decay (NMWD) of ^{12}_{Lambda}C produced via the (pi^+,K^+) reaction in coincidence...
Exclusive proton asymmetry measurement in non-mesonic weak decay of polarized 5_Lambda_He (2005)
Maruta, T., Ajimura, S., Aoki, K., Banu, A., Bhang, H., Fukuda, T., ...
The asymmetry parameter alpha_p^NM for a proton exclusively emitted in the Lambda p -> np process was, for the first time, measured in the non-mesonic weak decay of a polarized 5_La,bda_He...
Exclusive Measurement of the Nonmesonic Weak Decay of ^{5}_{\Lambda}He Hypernucleus (2005)
Kang, B. H., Ajimura, S., Aoki, K., Banu, A., Bhang, H., Fukuda, T., ...
We performed a coincidence measurement of two nucleons emitted from the nonmesonic weak decay (NMWD) of ^{5}_{\Lambda}He formed via the ^{6}Li(\pi^+,K^+) reaction. The energies of two nucleons and...
First limit on WIMP cross section with low background CsI(Tl) crystal detector (2005)
Bhang, H., Kim, S. Y., Lee, J., Lee, J. H., Kwak, J. W., ...
The Korea Invisible Mass Search (KIMS) collaboration has been carrying out WIMP search experiment with CsI(T$\ell$)crystal detectors at the YanYang Underground Laboratory. A successful reduction of...
A search for deeply bound kaonic nuclear states (2005)
Suzuki, T., Bhang, H., Franklin, G., Gomikawa, K., Hayano, R. S., Hayashi, T., ...
We have measured proton and neutron energy spectra by stopping negative kaons on liquid helium4. Two distinct peak structures were found on both spectra, which were assigned to the formation of new...
Mesonic and nonmesonic weak decay widths of medium-heavy lambda hypernuclei (2004)
Sato, Y., Ajimura, S., Aoki, K., Bhang, H., Hasegawa, T., Hashimoto, O., ...
We have measured the energy spectra of pions and protons emitted in the weak decay of 12_Lambda_C, 28_Lambda_Si, and Lambda_Fe hypernuclei produced via the (pi+, K+) reaction. The decay widths of the...
Proton asymmetry in non-mesonic weak decay of light hypernuclei (2004)
Maruta, T., Ajimura, S., Aoki, K., Banu, A., Bhang, H., Fukuda, T., ...
We have obtained the decay asymmetry parameters in non-mesonic weak decay of polarized Lambda-hypernuclei by measuring the proton asymmetry. The polarized Lambda-hypernuclei, 5_Lambda-He,...
Indication of a strange tribaryon S^+ from the ^4He(stopped K^-,n) reaction (2003)
Iwasaki, M., Suzuki, T., Bhang, H., Franklin, G., Gomikawa, K., Hayano, R. S., ...
We measured the neutron time-of-flight spectrum in the ^4He(stopped K^-, n) reaction by stopping negative kaons in a superfluid helium target. A clear enhancement was observed in the neutron...
Indications of neutrino oscillation in a 250 km long-baseline experiment (2003)
Aoki, S, Bhang, H, Casper, D, Choi, J H, ...
The K2K experiment observes indications of neutrino oscillation: a reduction of nu(mu) flux together with a distortion of the energy spectrum. Fifty-six beam neutrino events are observed in...
Measurement of the B(E2) of 7LambdaLi and Shrinkage of the Hypernuclear Size (2001)
Abe, D., Akikawa, H., Araki, K., Bhang, H., Endo, T., Fujii, Y., ...
Mass Dependence of Lifetimes of hypernuclei
H. Bhang, H. Park, Y. D. Kim, M. Youn, O. Hashimoto, K. Maeda, ...
We have determined the lifetimes of hypernuclei over a broad mass range, A=1156, from which its characteristic mass dependence is clearly observed. The lifetime decreases slightly from that of free...