On kaonic hydrogen. Quantum field theoretic and relativistic covariant approach

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dc.creatorIvanov, A. N.
dc.creatorCargnelli, M.
dc.creatorFaber, M.
dc.creatorMarton, J.
dc.creatorTroitskaya, N. I.
dc.creatorZmeskal, J.
dc.date2003-10-30
dc.date2003-12-14
dc.date.accessioned2026-07-07T11:44:19Z
dc.date.available2026-07-07T11:44:19Z
dc.descriptionWe study kaonic hydrogen, the bound K^-p state A_(Kp). Within a quantum field theoretic and relativistic covariant approach we derive the energy level displacement of the ground state of kaonic hydrogen in terms of the amplitude of K^-p scattering for arbitrary relative momenta. The amplitude of low-energy K^-p scattering near threshold is defined by the contributions of three resonances Lambda(1405), Lambda(1800) and Sigma^0(1750) and a smooth elastic background. The amplitudes of inelastic channels of low-energy K^-p scattering fit experimental data on near threshold behaviour of the cross sections and the experimental data by the DEAR Collaboration. We use the soft-pion technique (leading order in Chiral Perturbation Theory) for the calculation of the partial width of the radiative decay of pionic hydrogen A_(pi p) -> n + gamma and the Panofsky ratio. The theoretical prediction for the Panofsky ratio agrees well with experimental data. We apply the soft-kaon technique (leading order in Chiral Perturbation Theory) to the calculation of the partial widths of radiative decays of kaonic hydrogen A_(Kp) -> Lambda^0 + gamma and A_(Kp) -> Sigma^0 + gamma. We show that the contribution of these decays to the width of the energy level of the ground state of kaonic hydrogen is less than 1%.
dc.description33 pages, 1 figure, latex, References are added
dc.identifierhttps://arxiv.org/abs/nucl-th/0310081
dc.identifierhttp://arxiv.org/abs/nucl-th/0310081
dc.identifierEur.Phys.J.A21:11-28,2004
dc.identifierdoi:10.1140/epja/i2003-10178-y
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201560
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAtomic Physics
dc.titleOn kaonic hydrogen. Quantum field theoretic and relativistic covariant approach
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