Faddeev-Chiral Unitary Approach to the $K^- d$ scattering length
| Autor: | Christian Fayard, Kazuo Tsushima, Tetsuro Mizutani, Bijan Saghai |
|---|---|
| Přispěvatelé: | Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Nuclear and High Energy Physics
Particle physics Nuclear Theory [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] Strong interaction FOS: Physical sciences [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 01 natural sciences Spectral line High Energy Physics - Experiment Nuclear Theory (nucl-th) High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) Quantum mechanics 0103 physical sciences [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment Physics Unitarity 010308 nuclear & particles physics Scattering Sigma Scattering length Observable High Energy Physics - Phenomenology Amplitude [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] |
| Zdroj: | Physical Review C Physical Review C, American Physical Society, 2013, 87, pp.035201. ⟨10.1103/PhysRevC.87.035201⟩ Physical Review C, 2013, 87, pp.035201. ⟨10.1103/PhysRevC.87.035201⟩ |
| ISSN: | 2469-9985 2469-9993 |
| DOI: | 10.1103/PhysRevC.87.035201⟩ |
| Popis: | Our earlier Faddeev three-body study in the $K^-$-deuteron scattering length, $A_{K^-d}$, is revisited here in the light of the recent developments in two fronts: {\it (i)} the improved chiral unitary approach to the theoretical description of the coupled $\Kbar N$ related channels at low energies, and {\it (ii)} the new and improved measurement from SIDDHARTA Collaboration of the strong interaction energy shift and width in the lowest $K^-$-hydrogen atomic level. Those two, in combination, have allowed us to produced a reliable two-body input to the three-body calculation. All available low-energy $K^-p$ observables are well reproduced and predictions for the $\Kbar N$ scattering lengths and amplitudes, $(\pi \Sigma)^\circ$ invariant-mass spectra, as well as for $A_{K^-d}$ are put forward and compared with results from other sources. The findings of the present work are expected to be useful in interpreting the forthcoming data from CLAS, HADES, LEPS and SIDDHARTA Collaborations. Comment: 34 pages, 5 figures, text shortened, references updated, figures improved, typos fixed, version accepted for Phys. Rev. C |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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