Publisher’s Note: Measurement of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>π</mml:mi><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup><mml:mi>Λ</mml:mi></mml:mrow></mml:math>,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mover accent="true"><mml:mrow><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>¯</mml:mo></mml:mrow></mml:mover><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup><mml:mi>n</mml:mi

We develop a dynamical coupled-channels model of K − p reactions, aiming at extracting the parameters associated with hyperon resonances and providing the elementary antikaon-nucleon scattering amplitudes that can be used for investigating various phenomena in the strangeness sector such as the production of hypernuclei from kaon-nucleus reactions. The model consists of (a) meson-baryon (M B) potentials v M ′ B ′ ,M B derived from the phenomenological SU(3) Lagrangian, and (b) vertex interactions Γ M B,Y * for describing the decays of the bare excited hyperon states (Y * ) into M B states. The model is defined in a channel space spanned by the two-bodyKN , πΣ, πΛ, ηΛ, and KΞ states and also the three-body ππΛ and πKN states that have the resonant πΣ * andK * N components, respectively. The resulting coupled-channels scattering equations satisfy the multichannel unitarity conditions and account for the dynamical effects arising from the offshell rescattering processes. The model parameters are determined by fitting the available data of the unpolarized and polarized observables of the K − p →KN, πΣ, πΛ, ηΛ, KΞ reactions in the energy region from the threshold to invariant mass W = 2.1 GeV. Two models with equally good χ 2 fits to the data have been constructed. The partial-wave amplitudes obtained from the constructed models are compared with the results from a recent partial-wave analysis by the Kent State University group. We discuss the differences between these three analysis results. Our results at energies near the threshold suggest that the higher partial waves should be treated on the same footing as the S wave if one wants to understand the nature of Λ(1405)1/2 − using the data below theKN threshold, as will be provided by the J-PARC E31 experiment.

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“…13 and 14, respectively. Although the data of P are very limited, there are some from the recent Crystal Ball experiment [75,79]. As seen in Fig.…”

Section: Results Of the Fitmentioning

confidence: 99%

“…As explained in Ref. [75], this inconsistency could be from differences in analysis methods taken by the two analysis groups, even though they used the same data sample. Here we included both in our dataset, and fitted them along with other data simultaneously.…”

Section: Results Of the Fitmentioning

confidence: 99%

Dynamical coupled-channels model ofK−preactions: Determination of partial-wave amplitudes

et al. 2014

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“…Our results show that the resonance parameters are in agreement with the PDG values. [76] (open circles), [77] (squares) and [57] Figs. 2 and 3.…”

Section: A Parametersmentioning

confidence: 99%

Low-energy reactionsK−p→Σ0π0,Λπ0
Zhong
¹
,
Zhao
²

2013
Phys. Rev. C
12
3
16
0
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“…In the Σ * sector, new analyses of differential cross sections and Λ polarizations for reactions K − n → π − Λ and K − p → π 0 Λ are performed by the effective Lagrangian method, and the experimental data are from the new high-statistic CB experiment [35] and the early report of Ref. [38], with the c.m.…”

Section: New Analyses Of Cb Datamentioning

confidence: 99%

“…As we known, the polarization data is crucial important for analyses. However, with different data selection cuts and reconstructions, two groups in the same collaboration, i.e., the UCLA group [35] and the VA group [36], gave the very different polarization data. By fitting both two sets of the data, it is interesting to find that dropping four-star Λ(1690) It needs a completed low-lying hyperon spectrum to establish the multi-quark picture for hadronic excited states, especially the 1 2 − and 3 2 − Σ * , Ξ * and Ω * .…”

Section: New Analyses Of Cb Datamentioning

confidence: 99%

Penta-Quark States with Strangeness, Hidden Charm and Beauty

Wu¹,

Zou²

2016

Proceedings of the 10th International Workshop on the Physics of Excited Nucleons (NSTAR2015)

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The classical quenched quark models with three constituent quarks provide a good description for the baryon spatial ground states, but fail to reproduce the spectrum of baryon excited states. More and more evidences suggest that unquenched effects with multi-quark dynamics are necessary ingredients to solve the problem. Several new hyperon resonances reported recently could fit in the picture of penta-quark states. Based on this picture, some new hyperon excited states were predicted to exist; meanwhile with extension from strangeness to charm and beauty, super-heavy narrow N * and Λ * resonances with hidden charm or beauty were predicted to be around 4.3 and 11 GeV, respectively. Recently, two of such N * with hidden charm might have been observed by the LHCb experiment. More of those states are expected to be observed in near future. This opens a new window in order to study hadronic dynamics for the multi-quark states.

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Publisher’s Note: Measurement ofπ0Λ,K¯0n

Cited by 20 publications

References 0 publications

Dynamical coupled-channels model ofK−preactions: Determination of partial-wave amplitudes

Dynamical coupled-channels model ofK−preactions: Determination of partial-wave amplitudes

Low-energy reactionsK−p→Σ0π0,Λπ0
Zhong
¹
,
Zhao
²

2013
Phys. Rev. C
12
3
16
0
View full text Add to dashboard Cite

Penta-Quark States with Strangeness, Hidden Charm and Beauty

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Publisher’s Note: Measurement ofπ0Λ,K¯0n

Cited by 20 publications

References 0 publications

Dynamical coupled-channels model ofK−preactions: Determination of partial-wave amplitudes

Dynamical coupled-channels model ofK−preactions: Determination of partial-wave amplitudes

Low-energy reactionsK−p→Σ0π0,Λπ0Zhong1, Zhao2 2013Phys. Rev. C123160View full textAdd to dashboardCite

Penta-Quark States with Strangeness, Hidden Charm and Beauty

Contact Info

Product

Resources

About

Low-energy reactionsK−p→Σ0π0,Λπ0
Zhong
¹
,
Zhao
²

2013
Phys. Rev. C
12
3
16
0
View full text Add to dashboard Cite