H. Noumi

Search for the deeply bound K–pp state from the semi-inclusive forward-neutron spectrum in the in-flight K– reaction on helium-3

T. Hashimoto †1,*, S. Ajimura2, G. Beer3, H. Bhang4, M. Bragadireanu5, L. Busso7,8, M. Cargnelli6, S. Choi4, C. Curceanu9, S. Enomoto2, D. Faso7,8, H. Fujioka10, Y. Fujiwara1, T. Fukuda11, C. Guaraldo9, R. S. Hayano1, T. Hiraiwa2, M. Iio12, M. Iliescu9, K. Inoue13, Y. Ishiguro10, T. Ishikawa1, S. Ishimoto12, K. Itahashi14, M. Iwai12, M. Iwasaki14,15, Y. Kato14, S. Kawasaki13, P. Kienle‡16, H. Kou15, Y. Ma14, J. Marton6, Y. Matsuda17, Y. Mizoi11, O. Morra7, T. Nagae10, H. Noumi2, H. Ohnishi14,2, S. Okada14, H. Outa14, K. Piscicchia9, M. Poli Lener9, A. Romero Vidal9, Y. Sada10, A. Sakaguchi13, F. Sakuma14, M. Sato14, A. Scordo9, M. Sekimoto12, H. Shi9, D. Sirghi9,5, F. Sirghi9,5, S. Suzuki12, T. Suzuki1, K. Tanida4, H. Tatsuno1, M. Tokuda15, D. Tomono10, A. Toyoda12, K. Tsukada18, O. Vazquez Doce9,19, E. Widmann6, T. Yamaga13, T. Yamazaki1,14, H. Yim20, Q. Zhang14, and J. Zmeskal6

Spin polarization of λ hypernuclei produced by compound process of (π+, K+xnypγ) reactions

Abstract λ hypernuclear states with spin polarization are shown to be populated through nucleon and γ decays of compound λ hypernuclei produced by resonant ( π + , K + x n y p γ ) reactions. The low-lying Λ-hypernuclear states have the λ hyperon in the lowest 1 s 1 2 orbit. The intrinsic spin of Λ ( s λ ) is also shown to be well-polarized. These spin-oriented hypernuclear states useful for spectroscopic studies of hypernuclei such as electromagnetic moments and weak decays.

Production of strange and charmed baryons in pion induced reactions

We study the strangeness and charm productions induced by the pion beam, i.e. the � − p → K ∗0 � and � − p → D ∗− � + reactions, based on two different theoretical frameworks: an effective Lagrangian method and a Regge approach. In order to estimate the magnitude of the charm production relative to that of the strangeness production, we assume that the coupling constants for the charmed meson and baryon vertices are the same as those for the strangeness channel. We found that the total cross section for the charm production was about 10 3 −10 6 times smaller than that for the strangeness production, depending on theoretical approaches and kinematical regions. We also discuss each contribution to observables for both reactions. In general, the Regge approach explains the experimental data very well over the whole energy region.

Pion-induced reactions for charmed baryons

Pion-induced reactions for charmed baryons Sang-Ho Kim1, Atsushi Hosaka1,2,∗, Hyun-Chul Kim3, Hiroyuki Noumi1, and Kotaro Shirotori1 1Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan 2J-PARC Branch, KEK Theory Center, Institute of Particle and Nuclear Studies, KEK, Tokai, Ibaraki 319-1106, Japan 3Department of Physics, Inha University, Incheon 402-751, Republic of Korea ∗E-mail: hosaka@rcnp.osaka-u.ac.jp

A broad range spectrometer PIK for medium-energy meson spectroscopy

Abstract A broad range spectrometer, PIK, has been constructed for the study of Λ hypernuclei via the ( π + , K + ) reaction. The spectrometer can also be used for nuclear spectroscopy with medium-energy meson beams. It consists of two independent spectrometers: one analyzes the incident beam momentum, and the other determines the momentum of the scattered particle. The latter spectrometer is characterized by a large solid angle of 15–22 msr, a broad range momentum acceptance of 0.55–1.1 GeV/ c , a wide angular acceptance of 11°, and a short flight path length of 4.5 m. The scattered particle is identified by the use of silica aerogel Cherenkov counters and Lucite Cherenkov counters and by measuring its time-of-flight. The performance of the spectrometer is examined by the ( π + , K + ) reaction on a 12 C target at P π = 1.05 GeV/ c and by the ( π + , p) reaction on a CH 2 target.

The K1.8BR spectrometer system at J-PARC

A new spectrometer system was designed and constructed at the secondary beam line K1.8BR in the hadron hall of J-PARC to investigate

Charmed baryon spectroscopy experiment at J-PARC

bar K N

Indirectly Cooled Radiation-Resistant Magnets for Hadron Target Station at J-PARC

interactions and

Indirectly Cooled Radiation-Resistant Magnet With Slanting Saddle Shape Coils for New Secondary Beam Extraction at J-PARC Hadron Facility

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Construction and beam commissioning of Hadron Experimental Hall at J-PARC

-nuclear bound systems. The spectrometer consists of a high precision beam line spectrometer, a liquid