KAONIC HYDROGEN MEASUREMENT WITH DEAR AT DAΦNE

Author:

,CARGNELLI M.1,BEER G.2,BRAGADIREANU A. M.34,CURCEANU PETRASCU C.3,EGGER J. P.5,FUHRMANN H.1,GUARALDO C.3,ILIESCU M.34,ISHIWATARI T.1,ITAHASHI K.6,IWASAKI M.6,KIENLE P.1,KOIKE T.6,LAUSS B.7,LUCHERINI V.3,LUDHOVA L.8,MARTON J.1,MULHAUSER F.8,PONTA T.9,SCHALLER L. A.8,SEKI R.10,SIRGHI D. L.34,SIRGHI F.3,ZMESKAL J.1

Affiliation:

1. Institute for Medium Energy Physics, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria

2. Department of Physics and Astronomy, University of Victoria, BC V8W 3P6, Canada

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

4. Institute of Physics and Nuclear Engineering "Horia Hulubei", P.O. Box R-76900 Magurele, Bucharest, Romania

5. Institut de Physique, Université de Neuchâtel, CH-2000 Neuchâtel, Switzerland

6. Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama, 351-0198, Japan

7. Department of Physics, University of California, Le Conte Hall 366, Berkeley, CA 94720, USA

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

9. Institute of Physics and Nuclear Engineering "Horia Hulubei", P.O. Box R-76900 Magurele, Bucharest, Romania

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

Abstract

The DEAR (DAΦNE Exotic Atom Research) experiment1 measured the energy of X-rays emitted in the transitions to the ground states of kaonic hydrogen. The shift ∊ and the width Γ of the 1s state are sensitive quantities for tests of the current understanding of the low energy antikaon-nucleon interaction. We obtain ∊1s=-193±37 ( stat. )±6 ( syst. ) and Γ1s=249±112 ( stat. )±30 ( syst. ).

Publisher

World Scientific Pub Co Pte Lt

Subject

Astronomy and Astrophysics,Nuclear and High Energy Physics,Atomic and Molecular Physics, and Optics

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