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The DEAR case

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Abstract

The scientific program and the experimental setup of the DEAR (DAΦNE Exotic Atom Research) experiment at the new φ-factory DAΦNE of Laboratori Nazionali di Frascati are described. The objective of DEAR is to perform a 1% measurement of the K α line shift due to the strong interaction in kaonic hydrogen. A measurement will also be performed on kaonic deuterium for the first time. The aim is to investigate low-energy \(\overline K N\) physics and to understand SU(3) chiral symmetry breaking. The setup takes advantage of the unique features of the “kaon beam” from the φ decay in DAΦNE; of a low-temperature pressurized gaseous target; and of a detector for soft X-rays – the Charge-Coupled Device (CCD) – characterized by a very good energy (and spatial) resolution and by an unprecedented background rejection capability. The DEAR experiment represents a major effort in the study of low energy \(\overline K N\) interactions and has the potential to produce a breakthrough in the field.

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Authors and Affiliations

  1. INFN – Laboratori Nazionali di Frascati, C.P. 13, Via E. Fermi 40, I-00044, Frascati, Italy

    C. Guaraldo, S. Bianco, A.M. Bragadireanu, F.L. Fabbri, M. Iliescu, T.M. Ito, V. Lucherini & C. Petrascu

  2. Dipartimento di Fisica and INFN Sezione di Trieste, Università degli Studi di Trieste, Via A. Valerio 2, I-34127, Trieste, Italy

    M. Bregant, E. Milotti, A. Vacchi & E. Zavattini

  3. Institut de Physique, Université de Fribourg, Bd. de Pérolles, CH-1700, Fribourg, Switzerland

    M. Augsburger, D. Chatellard, P. Knowles, F. Mulhauser, L.A. Schaller, L. Schellenberg & H. Schneuwly

  4. Institut de Physique, 1 rue A.-L. Breguet, Université de Neuchâtel, CH-2000, Neuchâtel, Switzerland

    J.-P. Egger & D. Varidel

  5. Institute for Medium Energy Physics, Boltzmanngasse 3, A-1090, Vienna, Austria

    W.H. Breunlich, M. Cargnelli, B. Gartner, R. King, B. Lauss, J. Marton & J. Zmeskal

  6. Department of High Energy Physics, Institute of Physics and Nuclear Engineering “Horia Hulubei”, P.O. Box MG-6, R-76900, Magurele, Bucharest, Romania

    A.M. Bragadireanu, M. Iliescu, C. Petrascu & T. Ponta

  7. Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama, 351-01, Japan

    S.N. Nakamura

  8. Department of Physics, Hokkaido University, N8W5 Kikta, Sapporo, 060, Japan

    T. Koike

  9. Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113, Japan

    R.S. Hayano, M. Hori & T. Ishikawa

  10. Tokyo Institute of Technology, 2-12-1 Ookayama Meguro, Tokyo, 152, Japan

    T. Ishiwatari & M. Iwasaki

  11. High Energy Accelerator Research Organization, Tanashi Campus, KEK, 3-2-1 Midori, Tanashi, Tokyo, 188, Japan

    Y. Akaishi

  12. Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Victoria, BC, Canada, V8W 3P6

    G. Beer & A.C. Sanderson

  13. W.K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, CA, 91125, USA

    R. Seki

  14. Department of Physics and Astrophysics, California State University, Northridge, CA, 91330, USA

    R. Seki

Authors
  1. C. Guaraldo
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  2. S. Bianco
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  3. A.M. Bragadireanu
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  4. F.L. Fabbri
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  5. M. Iliescu
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  6. T.M. Ito
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  7. V. Lucherini
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  8. C. Petrascu
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  9. M. Bregant
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  10. E. Milotti
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  11. A. Vacchi
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  12. E. Zavattini
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  13. M. Augsburger
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  14. D. Chatellard
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  15. P. Knowles
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  16. F. Mulhauser
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  17. L.A. Schaller
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  18. L. Schellenberg
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  19. H. Schneuwly
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  20. J.-P. Egger
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  21. D. Varidel
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  22. W.H. Breunlich
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  23. M. Cargnelli
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  24. B. Gartner
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  25. R. King
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  26. B. Lauss
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  27. J. Marton
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  28. J. Zmeskal
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  29. T. Ponta
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  30. S.N. Nakamura
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  31. T. Koike
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  32. R.S. Hayano
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  33. M. Hori
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  34. T. Ishikawa
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  35. T. Ishiwatari
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  36. M. Iwasaki
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  37. Y. Akaishi
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  38. G. Beer
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  39. A.C. Sanderson
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  40. R. Seki
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Guaraldo, C., Bianco, S., Bragadireanu, A. et al. The DEAR case. Hyperfine Interactions 119, 253–261 (1999). https://doi.org/10.1023/A:1012612231176

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