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Search for \(\varvec{N\varDelta }\) Resonance State Via the Exclusive Measurement of \(\varvec{\gamma d\rightarrow d \pi ^{+} \pi ^{-}}\) Reaction

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Abstract

We investigate the \(\gamma d \rightarrow d \pi ^+ \pi ^-\) reaction for a study of a possible \(N\varDelta \) dibaryon state using a deuterium target with a magnetic spectrometer, Neutral Kaon Spectrometer 2 (NKS2), at Research Center for Electron Photon Science (ELPH), Tohoku University. The incident photon energy ranged from 0.78 to 1.08 GeV. Resonance-like structures were found at a mass of \({\sim }2.15~\mathrm {GeV}/c^2\) with a width of \({\sim }0.1~\mathrm {GeV}/c^2\) in the \(d\pi ^+\) and \(d\pi ^-\) invariant mass spectra.

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Acknowledgements

The NKS2 collaboration thanks the accelerator group of ELPH, Tohoku University for providing stable electron beams. This work is partly supported by the Grant-in-Aid for Scientific Research on Innovative Areas “Toward new frontiers Encounter and synergy of state-of-the-art astronomical detectors and exotic quantum beams,” JSPS KAKENHI Grants Nos. JP18H05459, 17H01121, 18H01220, 23540334, 16GS0201, JP18K13554, JP20H01926, and JP19J10568, and the Graduate Program on Physics for the Universe, Tohoku University (GP-PU).

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Authors and Affiliations

  1. Graduate School of Science, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan

    Y. Toyama, M. Kaneta, K. Maeda, Y. Muroi, S. Nagao & S. N. Nakamura

  2. Research Center for Electron Photon Science (ELPH), Tohoku University, Sendai, Miyagi, 982-0826, Japan

    T. Ishikawa

  3. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka, 567-0047, Japan

    H. Kanda

Authors
  1. Y. Toyama
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  2. T. Ishikawa
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  3. H. Kanda
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  4. M. Kaneta
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  5. K. Maeda
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  6. Y. Muroi
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  7. S. Nagao
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  8. S. N. Nakamura
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Correspondence to Y. Toyama.

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Toyama, Y., Ishikawa, T., Kanda, H. et al. Search for \(\varvec{N\varDelta }\) Resonance State Via the Exclusive Measurement of \(\varvec{\gamma d\rightarrow d \pi ^{+} \pi ^{-}}\) Reaction. Few-Body Syst 63, 15 (2022). https://doi.org/10.1007/s00601-021-01719-9

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  • DOI: https://doi.org/10.1007/s00601-021-01719-9

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