Properties of the (1405) measured at CLAS

Moriya, K.; Schumacher, R. A.

doi:10.1063/1.3701251

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…Here, we also compare our predictions with the experimental data from Refs. 8,11 . In this case, we pay attention not only to the contribution from s−channel N * (2120) resonance but also to that from the u−channel Λ pole, since the u−channel contribution at the backward angles could be important.…”

Section: Study On γP → K + λ(1520) Reactionmentioning

confidence: 99%

The role of N*(2120) nucleon resonance in KΛ(1520) photon and hadronic productions

Xie

Wang

Liu

et al. 2014

Int. J. Mod. Phys. Conf. Ser.

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The associate KΛ(1520) photon and hadronic production in the γp → K + Λ(1520), pp → pK + Λ(1520) and π − p → K 0 Λ(1520) reactions are investigated within the effective Lagrangian approach and the isobar model. We are interested in the contribution from the N * (2120) (previously called N * (2080)) resonance, which has a significant coupling to the KΛ(1520) channel. The theoretical results show that the current experimental data for the γp → K + Λ(1520) reaction favor the existence of the N * (2120) resonance, and that these measurements can be used to further constrain its properties. We present results, including the N * (2120) contribution, for total cross sections of the γp → K + Λ(1520), π − p → K 0 Λ(1520), and pp → pK + Λ(1520) reactions. For this latter one, we also calculate invariant mass and Dalitz plot distributions.

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Section: Study On γP → K + λ(1520) Reactionmentioning

confidence: 99%

The role of N*(2120) nucleon resonance in KΛ(1520) photon and hadronic productions

Xie

Wang

Liu

et al. 2014

Int. J. Mod. Phys. Conf. Ser.

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“…All distributions have been acceptance corrected for detector losses and summed over all production angles. Separation of various components of the line shape was achieved by fitting the total spec- trum with Monte Carlo data [34], and therewith subtracting off contributions from K * production and Σ(1385) production (scaled from its decay to the Λπ 0 final state). Results in nine W bins that CLAS covered in the g11 run period are pending.…”

Section: The λ(1405)mentioning

confidence: 99%

Hyperon Photo- and Electro- Production Experiments at CLAS

Schumacher¹

2010

Nuclear Physics A

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Developments in strangeness photo-and electro-production off the proton, as investigated using the CLAS system in Hall B at Jefferson Lab, are discussed in this paper. By measuring sufficient spin observables one can decompose the reaction mechanism into elementary amplitudes. We discuss progress toward this end in recent data from CLAS, including cross sections and spin observables. We next discuss new results on the mass distribution of the Λ(1405), which shows signs of being a composite meson-baryon object of mixed isospin. The work on other hyperons such as the Ξ resonances will be mentioned, and future prospects outlined.

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“…On the other hand the strong interaction of K − with nuclei is investigated in several experiments currently, like experiments at J-PARC [7,8]. Complementary, subthreshold resonances in the strangeness sector with hitherto unclear nature like Λ(1405) [9] are studied with p+p reaction with HADES at GSI [10] and at JLab [11]. However, best suited for low-energy strangeness nuclear physics is DAΦNE which is a unique source of nearly mono-energetic low-energy antikaons emitted with a back-to-back topology in the Φ decay.…”

Section: Introductionmentioning

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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Properties of the (1405) measured at CLAS

Cited by 5 publications

References 6 publications

The role of N*(2120) nucleon resonance in KΛ(1520) photon and hadronic productions

The role of N*(2120) nucleon resonance in KΛ(1520) photon and hadronic productions

Hyperon Photo- and Electro- Production Experiments at CLAS

Low-Energy Antikaon Interaction with Nuclei: The AMADEUS Challenge

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