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Plan for the measurement of Ξ-atomic X rays at J-PARC

  • K. Tanida
  • R. E. Chrien
  • S. Dairaku
  • E. Evtoukhovitch
  • Y. Y. Fu
  • H. Fujimura
  • O. Hashimoto
  • K. Hosomi
  • K. Imai
  • V. Kalinnikov
  • W. Kallies
  • S. Kamigaito
  • N. Karavchuk
  • T. Koike
  • C. P. Li
  • X. M. Li
  • Y. Ma
  • M. Mimori
  • K. Miwa
  • A. Moissenko
  • D. Mzhavia
  • K. Nakazawa
  • H. Noumi
  • V. Samoilov
  • A. Sato
  • Y. Sato
  • M. Sekimoto
  • K. Senzaka
  • K. Shirotori
  • H. Takahashi
  • T. Takahashi
  • H. Tamura
  • A. Toyoda
  • Z. Tsamalaidze
  • M. Ukai
  • T. Watanabe
  • C. J. Yoon
  • O. Zaimidoroga
  • J. Zhou
  • S. H. Zhou
  • L. H. Zhu

Abstract

We present our plan to measure X rays from Ξ atoms for the first time in the world at J-PARC. The measurement of X rays from Ξ atoms is a promising method to study the optical potential between Ξ and a nucleus as proved in the cases of other negative hadrons (π , K , \( \bar p \) , and Σ ). While we are intending to measure X rays from as many targets as possible over the periodic table, we have chosen Fe (iron) as the first target because the measurement will be the easiest and because large X-ray energy shift and width may be expected. Choice of other targets will be determined based on the result of the first experiment. We can accumulate several thousand counts of X rays and determine its energy shift down to ∼0.05 keV. This is sensitive enough to observe expected energy shift (∼1 keV) with reasonable accuracy, while sensitivities for X-ray width is somewhat weaker (measurable down to ∼1 keV).

PACS

36.10.Gv Mesonic atoms and molecules, hyperonic atoms and molecules 21.30.Fe Forces in hadronic systems and effective interactions 29.30.Kv X- and gamma-ray spectroscopy 

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Copyright information

© Società Italiana di Fisica / Springer-Verlag 2007

Authors and Affiliations

  • K. Tanida
    • 1
  • R. E. Chrien
    • 2
  • S. Dairaku
    • 1
  • E. Evtoukhovitch
    • 3
  • Y. Y. Fu
    • 4
  • H. Fujimura
    • 1
  • O. Hashimoto
    • 5
  • K. Hosomi
    • 5
  • K. Imai
    • 1
  • V. Kalinnikov
    • 3
  • W. Kallies
    • 3
  • S. Kamigaito
    • 1
  • N. Karavchuk
    • 3
  • T. Koike
    • 5
  • C. P. Li
    • 4
  • X. M. Li
    • 4
  • Y. Ma
    • 5
  • M. Mimori
    • 5
  • K. Miwa
    • 5
  • A. Moissenko
    • 3
  • D. Mzhavia
    • 3
  • K. Nakazawa
    • 6
  • H. Noumi
    • 7
  • V. Samoilov
    • 3
  • A. Sato
    • 1
  • Y. Sato
    • 7
  • M. Sekimoto
    • 7
  • K. Senzaka
    • 1
  • K. Shirotori
    • 5
  • H. Takahashi
    • 7
  • T. Takahashi
    • 7
  • H. Tamura
    • 5
  • A. Toyoda
    • 7
  • Z. Tsamalaidze
    • 3
  • M. Ukai
    • 5
  • T. Watanabe
    • 6
  • C. J. Yoon
    • 1
  • O. Zaimidoroga
    • 3
  • J. Zhou
    • 4
  • S. H. Zhou
    • 4
  • L. H. Zhu
    • 4
  1. 1.Kyoto UniversityJapan
  2. 2.Brookhaven National LaboratoryUSA
  3. 3.Joint Institute for Nuclear ResearchRussia
  4. 4.China Institute of Atomic EnergyChina
  5. 5.Tohoku UniversityJapan
  6. 6.Gifu UniversityJapan
  7. 7.High Energy Accelerator Research Organization (KEK)Japan

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