Search for the Kaonic Nuclear State, , in the exclusive channel

Suzuki, K.; Berger, Martin; Bühler, P.; Fabbietti, L.; Hartmann, O.; Herrmann, N.; Kienle, Paul; Kiš, M.; Leifels, Y.; Márton, J.; Münzer, Robert Helmut; Schafhauser, M; Widmann, E.; Yamazaki, T.; Zmeskal, J.

doi:10.1016/j.nuclphysa.2009.05.063

Cited by 18 publications

(12 citation statements)

References 8 publications

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“…While the upper limits for a visible signal strength at 2.5 and 3.5 GeV lie apparently below the predictions of Ref. [37] the DISTO value does exceed it by a factor of 4. No clear explanation for the excess with respect to the prediction at this specific energies was made available so far.…”

Section: Any Signs Of a Large Visible Signal?contrasting

confidence: 66%

“…[10] at 3.5 GeV, the upper limit from the 2.5 GeV DISTO measurement, the here extracted upper limit from the 3.5 GeV HADES data set and the calculated prediction of a production cross section for the KN N cluster of Ref. [37]. While the upper limits for a visible signal strength at 2.5 and 3.5 GeV lie apparently below the predictions of Ref.…”

Section: Any Signs Of a Large Visible Signal?mentioning

confidence: 54%

“…On the other hand, the extracted upper limits are still rather sizable and in the order of the predicted yield in Ref. [37]. This calls for new and high statistic experiments to measure the pK + Λ final state, possibly also employing polarization, and their subsequent analysis with modern techniques such as a partial wave analysis [10].…”

Section: Discussionmentioning

confidence: 94%

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Reanalysis ofp+preaction data: Probable absence of appK−state

Epple¹,

Fabbietti²

2015

Phys. Rev. C

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Our answer to the question posed in the title is: probably no. In this work we show that it is rather unlikely that the structure X(2265) reported by the DISTO collaboration corresponds to a kaonic nuclear bound state. The main argumentation is based on the repetition of the DISTO analysis on the HADES data sample, containing p+p reactions at 3.5 GeV. We further discuss many aspects in connection with the pK + Λ final state and the Λ(1405)-resonance. The results evidence possible problematics in the interpretation of the DISTO data.

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Section: Any Signs Of a Large Visible Signal?contrasting

confidence: 66%

Section: Any Signs Of a Large Visible Signal?mentioning

confidence: 54%

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Reanalysis ofp+preaction data: Probable absence of appK−state

Epple¹,

Fabbietti²

2015

Phys. Rev. C

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“…We measured at the end of 2009 the same reaction: p + p → p + + K + using FOPI apparatus at GSI, Darmstadt, Germany at T p = 3.1 GeV [16,17]. The beam energy was chosen to optimize the signal to background ratio and also to see the background shape separately.…”

Section: Discussionmentioning

confidence: 99%

Population of the X(2265) resonance in the p + p→X + K + reaction at T p = 2.5 GeV

Suzuki

Kienle

Maggiora³

et al. 2012

Hyperfine Interact

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DISTO data of p + p → p + + K + reactions at several beam energies were studied. We found in the missing-mass M(K + ) spectrum and the p invariant-mass spectrum at 2.85 GeV a broad resonance with M = 2267 MeV/c 2 and = 118 MeV, associated with a mono energetic kaon spectrum, indicating that a dibaryonic state (X) with strangeness −1 is produced in the p + p → X + K + reaction with X decaying into p + . The energy dependence of the X production rate and the preliminary result of the recently analyzed p

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“…A small fraction of K − (∼0.1%) is stopping in the gas and thus enables the antikaon absorption processes and the search for kaonic bound states like the prototype system K − pp proposed by theory [16]. Indications for the existence were found in different experiments like [17][18][19] but there is no clear picture concerning binding energy and decay width up to now.…”

Section: Pre-amadeus Studiesmentioning

confidence: 99%

Low-Energy Antikaon Interaction with Nuclei: The AMADEUS Challenge

Márton

Scordo²,

Berucci³

et al. 2017

Proceedings of the 12th International Conference on Low Energy Antiproton Physics (LEAP2016)

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The low-energy strong interaction of antikaons (K − ) with nuclei has many facets and represents a lively and challenging research field. It is interconnected to the peculiar role of strangeness, since the strange quark is rather light, but still much heavier than the up and down quarks. Thus, when strangeness is involved one has to deal with spontaneous and explicit chiral symmetry breaking in QCD. It is well known that the antikaon interaction with nucleons is attractive, but how strong ? Is the interaction strong enough to bind nucleons to form kaonic nuclei and, if so, what are the properties (binding energy, decay width)? There are controversial indications for such bound states and new results are expected to come soon. The existence of antikaon mediated bound states might have important consequences since it would open the possibility for the formation of cold baryonic matter of high density which might have a severe impact in astrophysics for the understanding of the composition of compact (neutron) stars. New experimental opportunities could be provided by the AMADEUS experiment at the DAΦNE electron-positron collider at LNF-INFN (Frascati, Italy). Pre-AMADEUS studies on the antikaon interaction with nuclei are carried out by analysis of data collected by KLOE in till 2005 and in special data runs using a carbon target insert. Studies for the dedicated AMADEUS detector setup taking advantage of the low-energy antikaons from Φ-meson decay delivered by DAΦNE are in progress. Some results obtained so far and the perspectives of the AMADEUS experiment are presented and discussed.

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Search for the Kaonic Nuclear State, , in the exclusive channel

Cited by 18 publications

References 8 publications

Reanalysis ofp+preaction data: Probable absence of appK−state

Reanalysis ofp+preaction data: Probable absence of appK−state

Population of the X(2265) resonance in the p + p→X + K + reaction at T p = 2.5 GeV

Low-Energy Antikaon Interaction with Nuclei: The AMADEUS Challenge

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