Abstract
We plan a semi-exclusive measurement of the 12C(p,dp) reaction to search for η’-mesic nuclei, aiming at investigating in-medium properties of the η′-meson. We employ a 2.5 GeV proton beam impinging on a carbon target to produce η′-mesic 11C nuclei via the 12C(p,d)η′⊗11C reaction. Using coincidence measurements of the forward going deuterons, important for missing-mass spectroscopy, and decay protons emitted from the η′-mesic nuclei. for event selection will provide a high experimental sensitivity to observe η’-mesic nuclei. We will perform the measurements by combining the WASA detector system with the fragment separator FRS at GSI and also with the Super-FRS at FAIR in the future. The plan of the experiments and the present status are reported.
Highlights
IOP PublishingY. K. Tanaka1,2,3, S. Bagchi1, J. Benlliure4, T. Dickel1, V. Drozd1,5, H. Ekawa3, H. Fujioka6, H. Geissel1,2, F. Goldenbaum7, C. Guo8, E. Haettner1, M. N. Harakeh5,1, R. S. Hayano9, S. Hirenzaki10, C. Hornung2, Y. Igarashi11, N. Ikeno12, K. Itahashi3, M. Iwasaki3, D. Jido6, N. Kalantar-Nayestanaki5, R. Kanungo13, B. Kindler1, R. Knobel1,2, D. Kostyleva1, N. Kurz1, N. Kuzminchuk1, B. Lommel1, Y. Ma3, S. Y. Matsumoto14, V. Metag2, S. Minami1, P. Moskal15, I. Mukha1, T. Nagae14, H. Nagahiro10, M. Nakagawa3, H. J. Ong16, H. Outa3, S. Pietri1, W. R. Plass1, A. Prochazka1, S. Purushothaman1, C. Rappold1, J. Ritman7, J. L. Rodrıguez-Sanchez4,1, R. Ruber17, O. Rundel15, T. R. Saito1,3, C. Scheidenberger1,2, R. Sekiya14, V. Serdyuk7, H. Simon1, B. Sitar18, M. Skurzok15,19, P. Strmen18, B. Sun8, I. Szarka18, M. Takechi20, I. Tanihata16,8, S. Terashima8, H. Weick1, A. Yamamoto11, J. Zhao8 (η-PRiME/Super-fragment separator (FRS) Experiment Collaboration)
The especially large mass of the η meson compared with the other pseudoscalar mesons (π, K, η) is theoretically understood by an interplay between UA(1) anomaly and chiral-symmetry breaking in QCD [1, 2]
Semi-exclusive measurement of the 12C(p,dp) reaction with fragment separator (FRS)/Super-FRS at GSI/FAIR In order to extend the experimental sensitivity towards a region of smaller real-part potentials, we propose a semi-exclusive measurement of the 12C(p,dp) reaction [19]
Summary
Y. K. Tanaka1,2,3, S. Bagchi1, J. Benlliure4, T. Dickel1, V. Drozd1,5, H. Ekawa3, H. Fujioka6, H. Geissel1,2, F. Goldenbaum7, C. Guo8, E. Haettner1, M. N. Harakeh5,1, R. S. Hayano9, S. Hirenzaki10, C. Hornung2, Y. Igarashi11, N. Ikeno12, K. Itahashi3, M. Iwasaki3, D. Jido6, N. Kalantar-Nayestanaki5, R. Kanungo13, B. Kindler1, R. Knobel1,2, D. Kostyleva1, N. Kurz1, N. Kuzminchuk1, B. Lommel1, Y. Ma3, S. Y. Matsumoto14, V. Metag2, S. Minami1, P. Moskal15, I. Mukha1, T. Nagae14, H. Nagahiro10, M. Nakagawa3, H. J. Ong16, H. Outa3, S. Pietri1, W. R. Plass1, A. Prochazka1, S. Purushothaman1, C. Rappold1, J. Ritman7, J. L. Rodrıguez-Sanchez4,1, R. Ruber17, O. Rundel15, T. R. Saito1,3, C. Scheidenberger1,2, R. Sekiya14, V. Serdyuk7, H. Simon1, B. Sitar18, M. Skurzok15,19, P. Strmen18, B. Sun8, I. Szarka18, M. Takechi20, I. Tanihata16,8, S. Terashima8, H. Weick1, A. Yamamoto11, J. Zhao8 (η-PRiME/Super-FRS Experiment Collaboration)
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