The FOREST detector for meson photoproduction experiments at ELPH

Ishikawa, T.; Fujimura, H.; Fukasawa, Hiroshi; Hashimoto, Ryo; Ishida, Takashi; Kaida, S.; Kasagi, J.; Kawano, A.; Kuwasaki, S.; Maeda, K.; Miyahara, F.; Mochizuki, K.; Nakabayashi, T.; Nakamura, Akihiko; Nawa, K.; Ogushi, S.; Okada, Y.; Okamura, Koji; Onodera, Y.; Saito, Yoshihiko; Sakamoto, Y.; Sato, M.; Shimizu, H.; Sugai, H.; Suzuki, K.; Takahashi, Shinichiro; Tsuchikawa, Y.; Yamazaki, H.; Yonemura, Hiroshi

doi:10.1016/j.nima.2016.06.054

Cited by 28 publications

(9 citation statements)

References 35 publications

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“…All the final-state particles in the γd → π 0 π 0 d reaction were measured using an electromagnetic (EM) calorimeter complex, FOREST [17]. FOREST consists of three different EM calorimeters: the forward, central, and backward calorimeters consisting of 192 pure CsI crystals, 252 lead scintillating fiber modules, and 62 lead glass Cherenkov counters, respectively.…”

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confidence: 99%

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First measurement of coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV

et al. 2017

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The total cross sections were measured for coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV for the first time. No clear resonancelike behavior is observed in the excitation function for W γd = 2.38-2.61 GeV, where the d * (2380) dibaryon resonance observed at COSY is expected to appear. The measured excitation function is consistent with the existing theoretical calculation for this reaction. The upper limit of the total cross section is found to be 0.034 µb for the dibaryon resonance at W γd = 2.37 GeV (90% confidence level) in the γd → π 0 π 0 d reaction.

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confidence: 99%

“…, 16. The details of the groups are described elsewhere [17]. The average trigger rate was 1.1 kHz, and the average DAQ efficiency was 85%.…”

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confidence: 99%

First measurement of coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV

et al. 2017

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“…The target used in the experiments was liquid deuterium with a thickness of 45.9 mm. All the final-state particles in the γd → π 0 π 0 d reaction were measured using an electromagnetic (EM) calorimeter complex, FOREST [10]. The solid angle of FOREST was approximately 88% in total.…”

Section: Methodsmentioning

confidence: 99%

Study of non-strange dibaryon resonances via coherent double neutral-pion photoproduction on the deuteron

Ishikawa¹,

Fujimura²,

He³

et al. 2018

Proceedings of XVII International Conference on Hadron Spectroscopy and Structure — PoS(Hadron2017)

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The cross sections was measured for coherent double neutral-pion photoproduction on the deuteron using the tagged photon beams from the 0.9 and 1.2 GeV primary electron beams at the Research Center for Electron Photon Science, Tohoku University, Japan. The four-momenta of the four photons from the two π 0 decays and deuteron are measured with the FOREST detector, and the γd → π 0 π 0 d reaction was identified using 6-constraint kinematic fit (energy and threemomentum conservation, and two π 0 masses). The total cross section is found to be 18.4 ± 9.2 nb for the d * (2380) dibaryon resonance at W γd = 2.37 GeV, which is a candidate of the isoscalar ∆∆ quasi-bound state D 03 , in the γd → π 0 π 0 d reaction. The measured excitation function is consistent with the existing theoretical calculation for this reaction. At high incident energies, π 0 d invariant-mass distributions show a peak at approximately 2.15 GeV, which can be attributed to a N∆ quasi-bound state D

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“…The incident photon energy ranges from 820 to 1260 MeV for the circulating electron energy of 1320 MeV in the electron synchrotron. The details of the FOREST detector including the liquid deuterium target is described elsewhere [12]. The forward scattered proton is momentum-analyzed with a bending magnet (transported from the low energy ring of KEKB) behind FOREST.…”

Section: Methodsmentioning

confidence: 99%

\(\eta \)n Scattering Length from the \(\gamma \)d \( \to \) p\(\eta \)n Reaction at \(E_{\gamma } \sim 0.9\) GeV

Ishikawa¹,

Fujioka²,

Honda³

et al. 2017

Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016)

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We plan to conduct a new experiment for the γd → pηn reaction using the FOREST detector at the Research Center for Electron Photon Science, Tohoku University, Japan. The main objective is to determine the low-energy η-neutron scattering parameters. The photon beam with energies around 930 MeV can give the recoilless condition of η mesons by detecting the protons at 0• . The effects of the the η-neutron final-state interaction must be enhanced due to the small relative momentum between an η meson and a residual neutron. In this contribution, the planned FOREST experiment is presented.

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The FOREST detector for meson photoproduction experiments at ELPH

Cited by 28 publications

References 35 publications

First measurement of coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV

First measurement of coherent double neutral-pion photoproduction on the deuteron at incident energies below 0.9 GeV

Study of non-strange dibaryon resonances via coherent double neutral-pion photoproduction on the deuteron

\(\eta \)n Scattering Length from the \(\gamma \)d \( \to \) p\(\eta \)n Reaction at \(E_{\gamma } \sim 0.9\) GeV

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