Kaonic hydrogen X-ray measurement in SIDDHARTA

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• 作者：SIDDHARTA Collaboration ; M. Bazzi^a ; G. Beer^b ; L. Bombelli^c ; A.M. Bragadireanu^a ; ^d ; M. Cargnelli^e ; G. Corradi^a ; C. Curceanu (Petrascu)^a ; A. d始Uffizi^a ; C. Fiorini^c ; T. Frizzi^c ; F. Ghio^f ; C. Guaraldo^a ; R.S. Hayano^g ; M. Iliescu^a ; ^d ; T. Ishiwatari^e ; M. Iwasaki^h ; P. Kienle^e ; ⁱ ; P. Levi Sandri^a ; A. Longoni^c ; V. Lucherini^a ; J. Marton^e ; S. Okada^a ; ^{shinji.okada@lnf.infn.it} ; D. Pietreanu^a ; ^d ; T. Ponta^d ; A. Rizzo^a ; A. Romero Vidal^a ; A. Scordo^a ; H. Shi^g ; D.L. Sirghi^a ; ^d ; F. Sirghi^a ; ^d ; H. Tatsuno^g ; ¹ ; A. Tudorache^d ; V. Tudorache^d ; O. Vazquez Doce^a ; E. Widmann^e ; J. Zmeskal^e
• 关键词：Kaonic atoms ; Low-energy QCD ; Antikaon&ndash ; nucleon physics ; X-ray detection
• 刊名：Nuclear Physics A
• 出版年：2012
• 期刊代码：44_03759474
• 类别：ph
• 出版时间：1 May, 2012
• 卷：881
• 期：Complete
• 页码：88-97
• 文件大小：517 K

摘要

Kaonic hydrogen atoms provide a unique laboratory to probe the kaon-nucleon strong interaction at the energy threshold, allowing an investigation of the interplay between spontaneous and explicit chiral symmetry breaking in low-energy QCD. The SIDDHARTA Collaboration has measured the K-series X rays of kaonic hydrogen atoms at the DA桅NE electron-positron collider of Laboratori Nazionali di Frascati, and has determined the most precise values of the strong-interaction induced shift and width of the 1s atomic energy level. This result provides vital constraints on the theoretical description of the low-energy interaction.