Prospects for hypernuclear physics at Mainz: From KAOS@MAMI to PANDA@FAIR

Esser, A.; Nagao, Shijo; Schulz, Florian; Bleser, S.; Steinen, Marcell; Achenbach, P.; Gayoso, C. Ayerbe; Böhm, R.; Borodina, O.; Bosnar, D.; Botvina, A. S.; Bozkurt, V.; Debenjak, L.; Distler, M. O.; Friščić, I.; Fujii, Y.; Gogami, T.; Rodríguez, M. Gómez; Hashimoto, Osamu; Hirose, Satoshi; Kanda, H.; Kaneta, M.; Kim, E.; Kohl, Y.; Kusaka, J.; Margaryan, A.; Merkel, H.; Mihovilovič, M.; Müller, U.; Nakamura, S. N.; Pochodzalla, J.; Rappold, C.; Reinhold, J.; Saito, Takehiko; Lorente, A. Sánchez; Majos, S. Sánchez; Schlimme, B. S.; Schoth, M.; Sfienti, C.; Širca, S.; Tang, L.; Thiel, M.; Tsukada, K.; Weber, A.; Yoshida, K.

doi:10.1016/j.nuclphysa.2013.02.008

Cited by 22 publications

(25 citation statements)

References 46 publications

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“…The kaon survival probability was K ≈ 0.40 for a flight-path of 6.45 m. The time-of-flight (TOF) was measured inside the spectrometer with a resolution of σ t ≈ 180 ps along flight-paths of 1 − 1.5 m. The experimental challenge in this experiment was originated by the positrons from pair production with large cross-sections near zero degrees. The resulting high flux of background positrons in the spectrometer was reduced by several orders of magnitude by using a leadabsorber with its thickness up to t = 25 X 0 radiation lengths[22]. The detection loss for the kaons in this absorber amounted to η Lead ∼ 70 %.…”

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confidence: 99%

Observation ofHΛ4Hyperhydrogen by Decay-Pion Spectroscopy in Electron Scattering

Esser¹,

Nagao²,

Schulz³

et al. 2015

Phys. Rev. Lett.

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100

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At the Mainz Microtron MAMI, the first high-resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a 9 Be target in order to study the Λ binding energy of light hypernuclei. Positively charged kaons were detected by a short-orbit spectrometer with a broad momentum acceptance at zero degree forward angles with respect to the beam, efficiently tagging the production of strangeness in the target nucleus. In coincidence, negatively charged decay-pions were detected by two independent high-resolution spectrometers. About 10 3 pionic weak decays of hyperfragments and hyperons were observed. The pion momentum distribution shows a monochromatic peak at p π ≈ 133 MeV/c, corresponding to the unique signature for the two-body decay of hyperhydrogen 4 Λ H → 4 He + π − , stopped inside the target. Its Λ binding energy was determined to be B Λ = 2.12 ± 0.01 (stat.) ± 0.09 (syst.) MeV with respect to the 3 H + Λ mass.

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confidence: 99%

Observation ofHΛ4Hyperhydrogen by Decay-Pion Spectroscopy in Electron Scattering

Esser¹,

Nagao²,

Schulz³

et al. 2015

Phys. Rev. Lett.

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100

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“…The realization of a second target using the produced cascade particles as a secondary beam is important. At first, for the copious production of multi-strangeness hyperons and multistrangeness hypernuclei, as proposed by the PANDA -experiment [57,58]. According to the PANDA -proposal low-energy Ξ-beams will be used for the production of ΛΛ-hypernuclei.…”

Section: Hadron-induced Reactionsmentioning

confidence: 99%

“…In Sec. 4 we present the results for reactions involved in the PANDAexperiment [57,58]. That is, antiproton-induced reactions including the supplementary step with secondary Ξ-beams.…”

Section: Introductionmentioning

confidence: 99%

Multi-strangeness production in hadron induced reactions

et al. 2016

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We discuss in detail the formation and propagation of multi-strangeness particles in reactions induced by hadron beams relevant for the forthcoming experiments at FAIR. We focus the discussion on the production of the decuplet-particle Ω and study for the first time the production and propagation mechanism of this heavy hyperon inside hadronic environments. The transport calculations show the possibility of Ω-production in the forthcoming PANDA -experiment, which can be achieved with measurable probabilities using high-energy secondary Ξ-beams. We predict cross sections for Ω-production. The theoretical results are important in understanding the hyperon-nucleon and, in particular, the hyperon-hyperon interactions also in the high-strangeness sector. We emphasize the importance of our studies for the research plans at FAIR.

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“…In 2007 the use of magnetic spectrometers to measure precisely the momenta of pions from weak two-body decays of electroproduced hyperfragments was proposed for Jefferson Lab [7,8]. A similar experimental program was started at the electron microtron in Mainz (MAMI) [9], where the first high resolution pion spectroscopy from decays of strange systems was performed by electron scattering off a 9 Be target [10,11,12]. About 103 weak pionic decays of hyperfragments and hyperons were observed.…”

Section: Introductionmentioning

confidence: 99%

High precision momentum calibration of the magnetic spectrometers at MAMI for hypernuclear binding energy determination

Margaryan

Annand

Achenbach

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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We propose a new method for absolute momentum calibration of magnetic spectrometers used in nuclear physics, using the time-of-flight (TOF) differences of pairs of particles with different masses. In cases where the flight path is not known, a calibration can be determined by using the TOF differences of two pair combinations of three particles. A Cherenkov detector, read out by a radio frequency photomultiplier tube, is considered as the high-resolution and highly stable TOF detector. By means of Monte Carlo simulations it is demonstrated that the magnetic spectrometers at the MAMI electron-scattering facility can be calibrated absolutely with an accuracy δp/p ≤ 10 −4 , which will be crucial for high precision determination of hypernuclear masses.

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Prospects for hypernuclear physics at Mainz: From KAOS@MAMI to PANDA@FAIR

Cited by 22 publications

References 46 publications

Observation ofHΛ4Hyperhydrogen by Decay-Pion Spectroscopy in Electron Scattering

Observation ofHΛ4Hyperhydrogen by Decay-Pion Spectroscopy in Electron Scattering

Multi-strangeness production in hadron induced reactions

High precision momentum calibration of the magnetic spectrometers at MAMI for hypernuclear binding energy determination

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