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20 April 2024

» arxiv » 1201.4635

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Kaonic hydrogen X-ray measurement in SIDDHARTA
M. Bazzi ; G. Beer ; L. Bombelli ; A. M. Bragadireanu ; M. Cargnelli ; G. Corradi ; C. Curceanu ; A. d'Uffizi ; C. Fiorini ; T. Frizzi ; F. Ghio ; C. Guaraldo ; R. S. Hayano ; M. Iliescu ; T. Ishiwatari ; M. Iwasaki ; P. Kienle ; P. Levi Sandri ; A. Longoni ; V. Lucherini ; J. Marton ; S. Okada ; D. Pietreanu ; T. Ponta ; A. Rizzo ; A. Romero Vidal ; A. Scordo ; H. Shi ; D. L. Sirghi ; F. Sirghi ; H. Tatsuno ; A. Tudorache ; V. Tudorache ; O. Vazquez Doce ; E. Widmann ; J. Zmeskal ;
Date:	23 Jan 2012
Abstract:	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$Phi$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 $ar{K}N$ interaction.
Source:	arXiv, 1201.4635
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