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

doi:10.1016/j.nuclphysa.2011.12.008

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arXiv · 1201.4635

Kaonic hydrogen X-ray measurement in SIDDHARTA

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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$Φ$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 $\bar{K}N$ interaction.

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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. 2012-01-23. Kaonic hydrogen X-ray measurement in SIDDHARTA. https://doi.org/10.1016/j.nuclphysa.2011.12.008

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