Preliminary study of kaonic deuterium X-rays by the SIDDHARTA experiment at DA¦µNE

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• 作者：M. Bazzi^a ; G. Beer^b ; C. Berucci^c ; ^a ; L. Bombelli^d ; A.M. Bragadireanu^a ; ^e ; M. Cargnelli^c ; ^{michael.cargnelli@oaaw.ac.at} ; C. Curceanu (Petrascu)^a ; A. d?Uffizi^a ; C. Fiorini^d ; T. Frizzi^d ; F. Ghio^f ; C. Guaraldo^a ; R. Hayano^g ; M. Iliescu^a ; T. Ishiwatari^c ; M. Iwasaki^h ; P. Kienle^c ; ⁱ ; ¹ ; P. Levi Sandri^a ; A. Longoni^d ; J. Marton^c ; S. Okada^h ; D. Pietreanu^a ; ^e ; T. Ponta^e ; A. Romero Vidal^j ; E. Sbardella^a ; A. Scordo^a ; H. Shi^g ; D.L. Sirghi^a ; ^e ; F. Sirghi^a ; ^e ; H. Tatsuno^a ; A. Tudorache^e ; V. Tudorache^e ; O. Vazquez Doceⁱ ; E. Widmann^c ; J. Zmeskal^c
• 关键词：Atomic physics ; H2(K&minus ; X) ; E=lowE=low ; measured X-ray spectrum using SDDS at SIDDHARTA-2 ; deduced kaonic atoms X-ray K-series yields to be used for low-energy QCD
• 刊名：Nuclear Physics A
• 出版年：2013
• 出版时间：3 June, 2013
• 年：2013
• 卷：907
• 期：Complete
• 页码：69-77
• 全文大小：263 K

文摘

The study of the system at very low energies plays a key role for the understanding of the strong interaction between hadrons in the strangeness sector. At the DA¦µNE electron-positron collider of Laboratori Nazionali di Frascati we studied kaonic atoms with and , taking advantage of the low-energy charged kaons from m>¦µm>-mesons decaying nearly at rest. The SIDDHARTA experiment used X-ray spectroscopy of the kaonic atoms to determine the transition yields and the strong interaction induced shift and width of the lowest experimentally accessible level (1s for H and D and 2p for He). Shift and width are connected to the real and imaginary part of the scattering length. To disentangle the isospin dependent scattering lengths of the antikaon-nucleon interaction, measurements of and of are needed. We report here on an exploratory deuterium measurement, from which a limit for the yield of the K-series transitions was derived: and (CL 90 % ). Also, the upcoming SIDDHARTA-2 kaonic deuterium experiment is introduced.