High resolution study ofhyperon-nucleon interactions by associated strangeness production in pp collisions

Siebert, R.; Didélez, J. P.; Frascaria, R.; Reposeur, T.; Warde, E.; Lippert, C.; Ernst, J.; Hinterberger, F.; Mayer-Kuckuk, Theo; Boivin, M.; Yonnet, Jean‐Paul; Saghai, B.; Grossiord, J. Y.; Bovet, E.; Egger, J. P.; Blanpied, G. S.; Freedom, B.M.; Perdrisat, C. F.

doi:10.1016/0375-9474(94)90329-8

Cited by 67 publications

(82 citation statements)

References 32 publications

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“…This simple model leads also to a excellent agreement with the spectra of the Kaons, emitted at different angles in the reaction pp → K + X, accurately measured at SAT-URNE [7]. Above the Plane Wave contribution, the low energy ΛP scattering reproduces the characteristic enhancement, near the end point of the spectrum, while the coupling between the Λ and Σ channels is responsible for the narrow structure near the Σ production threshold.…”

Section: Hadronic Sectorsupporting

confidence: 63%

“…Near threshold the model underestimates the data by about 50%: This can be easily accommodated by adjusting the cut-off mass of the hadronic form factors. I did not play this game, since care has to be taken not to spoil the good agreement with the SATURNE data [7]. The balance between π and K exchange has been beautifully confirmed by the last experiment performed at SATURNE, DISTO [11].…”

Section: Hadronic Sectormentioning

confidence: 81%

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Strangeness production by electromagnetic and hadronic probes

Laget¹

2001

Nuclear Physics A

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After pioneering works on hypernuclei, strangeness production mechanisms have been studied in hadron collisions and photoreactions in the sixties. Recent experiments at SATURNE and COSY, in the hadronic sector, as well as ELSA and JLab, in the electromagnetic sector, have confirmed our basic ideas on the reaction mechanisms. In the near future, strangeness production at JLab, HERMES and COMPASS may prove to be a powerful tool to study hadronic matter.

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Section: Hadronic Sectorsupporting

confidence: 63%

Section: Hadronic Sectormentioning

confidence: 81%

Strangeness production by electromagnetic and hadronic probes

Laget¹

2001

Nuclear Physics A

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“…At the higher beam energy of 2.3 GeV, corresponding to Q = 170 MeV with respect to the Σ 0 channel, there has been a detailed inclusive measurement of K + production in the pp → K + X reaction [12]. Significant enhancements are observed at both the Λp and ΣN thresholds with similar magnitudes.…”

mentioning

confidence: 83%

Comparison ofΛandΣ0Production near Threshold in Proton-Proton Collisions

Sewerin¹,

Schepers²,

Balewski³

et al. 1999

Phys. Rev. Lett.

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Threshold measurements of the associated strangeness production reactions pp → pK + Λ and pp → pK + Σ 0 are presented. Although slight differences in the shapes of the excitation functions are observed, the most remarkable feature of the data is that at the same excess energy the total cross section for the Σ 0 production appears to be about a factor of 28 smaller than the one for the Λ particle. It is concluded that strong Σ 0 p final state interactions, and in particular the ΣN → Λp conversion reaction, are the likely cause of the depletion for the yield in the Σ signal. This hypothesis is in line with other experimental evidence in the literature.

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“…The pp → pΛK + and pp → pΣ 0 K + reactions close to threshold have been advocated as a source of information on the pΛ interaction due to a clear enhancement of the pΛ invariant mass distribution close to threshold [1] with respect to a pure phase space expectation. The effect of the pΛ final state interaction (FSI) was already studied in Refs.…”

Section: Introductionmentioning

confidence: 99%

Thepp→pΛK+andpp→pΣ0K+
Xie
¹
,
Chen
²
,
Oset
³

2011
Phys. Rev. C
8
0
8
0
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We report on a theoretical study of the pp → pΛK + and pp → pΣ 0 K + reactions near threshold using a chiral dynamical approach. The production process is described by single-pion and singlekaon exchange. The final state interactions of nucleon-hyperon, K-hyperon and K-nucleon systems are also taken into account. We show that our model leads to a fair description of the experimental data on the total cross section of the pp → pΛK + and pp → pΣ 0 K + reactions. We find that the experimental observed strong suppression of Σ 0 production compared to Λ production at the same excess energy can be explained. However, ignorance of phases between some amplitudes does not allow to properly account for the nucleon-hyperon final state interaction for the pp → pΣ 0 K + reaction. We also demonstrate that the invariant mass distribution and the Dalitz plot provide direct information about the Λ and Σ 0 production mechanism, and may be tested by experiments at COSY or HIRFL-CSR.

show abstract

High resolution study ofhyperon-nucleon interactions by associated strangeness production in pp collisions

Cited by 67 publications

References 32 publications

Strangeness production by electromagnetic and hadronic probes

Strangeness production by electromagnetic and hadronic probes

Comparison ofΛandΣ0Production near Threshold in Proton-Proton Collisions

Thepp→pΛK+andpp→pΣ0K+
Xie
¹
,
Chen
²
,
Oset
³

2011
Phys. Rev. C
8
0
8
0
View full text Add to dashboard Cite

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High resolution study ofhyperon-nucleon interactions by associated strangeness production in pp collisions

Cited by 67 publications

References 32 publications

Strangeness production by electromagnetic and hadronic probes

Strangeness production by electromagnetic and hadronic probes

Comparison ofΛandΣ0Production near Threshold in Proton-Proton Collisions

Thepp→pΛK+andpp→pΣ0K+Xie1, Chen2, Oset3 2011Phys. Rev. C8080View full textAdd to dashboardCite

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About

Thepp→pΛK+andpp→pΣ0K+
Xie
¹
,
Chen
²
,
Oset
³

2011
Phys. Rev. C
8
0
8
0
View full text Add to dashboard Cite