An analysis of eta -production via the p<sup>6</sup>Li to eta<sup>7</sup>Be reaction

Al-Khalili, Jim; Bárbaro, M. B.; Wilkin, C.

doi:10.1088/0954-3899/19/3/008

Cited by 15 publications

(22 citation statements)

References 33 publications

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“…In order to make a comparison of the cross sections more meaningful we subtract from the latter experimental result the contributions of the L = 3 states. Al-Khalili et al [16] derived an expression for the differential cross section…”

Section: Resultsmentioning

confidence: 99%

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Experimental study of thep+6Li→η+7Bereaction 11.3 MeV above threshold

Budzanowski¹,

Chatterjee²,

Hawranek³

et al. 2010

Phys. Rev. C

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The cross section for the reaction p+ 6 Li → η+ 7 Be was measured at an excess energy of 11.28 MeV above threshold by detecting the recoiling 7 Be nuclei. A dedicated set of focal plane detectors was built for the magnetic spectrograph Big Karl and was used for identification and four momentum measurement of the 7 Be. A differential cross section of dσ dΩ = (0.69±0.20( stat.)±0.20( syst.)) nb/sr for the ground state plus the 1/2 − was measured. The result is compared to model calculations. 25.40.Ve, 25.90.+k

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Section: Resultsmentioning

confidence: 99%

“…and 1/2 (0.43 MeV), and particle unbound states with L = 3: 7/2 (4.57 MeV) and 5/2 (≈ 7 MeV) [15]. The reaction was theoretically studied by assuming a reaction p d → η 3 He with an additional α particle as a spectator [16].…”

Section: Methodsmentioning

confidence: 99%

Experimental study of thep+6Li→η+7Bereaction 11.3 MeV above threshold

Budzanowski¹,

Chatterjee²,

Hawranek³

et al. 2010

Phys. Rev. C

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“…The exited states with L = 3 are particle unstable. Al-Khalili et al [126] have analysed these data. They assumed that the target nucleus consists of a deuteron and an α particle.…”

Section: The Reaction P+ 6 Li→ η+ 7 Bementioning

confidence: 99%

“…[126] and the amplitude f (pd → η 3 He) extracted from the two data sets discussed above, the cross section for the reaction leading to the 7 Be ground state could be extracted. The two data are shown in Fig.…”

Section: The Reaction P+ 6 Li→ η+ 7 Bementioning

confidence: 99%

Search for quasi boundηmesons

Machner

2015

J. Phys. G: Nucl. Part. Phys.

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The search for a quasi bound η meson in atomic nuclei is reviewed. This tentative state is studied theoretically as well as experimentally. The theory starts from elastic η nucleon scattering which is derived from production data within some models. From this interaction the η nucleus interaction is derived. Model calculations predict binding energies and widths of the quasi bound state. Another method is to derive the η nucleus interaction from excitation functions of η production experiments. The s wave interaction is extracted from such data via final state interaction theorem. We give the derivation of s wave amplitudes in partial wave expansion and in helicity amplitudes and their relation to observables. Different experiments extracting the final state interaction are discussed as are production experiments. So far only three experiments give evidence for the existence of the quasi bound state: a pion double charge exchange experiment, an effective mass measurement, and a transfer reaction at recoil free kinematics with observation of the decay of the state.

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“…The reaction has been studied in a cluster-model approach [271], where the initial and final nuclear states were described in terms of their αd and ατ components, respectively. In this model the process is assumed to be driven by pd → 3 He η with the initial d and final τ in the two nuclei.…”

Section: The η-Meson Massmentioning

confidence: 99%

Production of η and η′ mesons on nucleons and nuclei

Krusche¹,

Wilkin²

2015

Progress in Particle and Nuclear Physics

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The production of η and η mesons in photon-and hadron-induced reactions on free and quasifree nucleons and on nuclei is reviewed. The extensive database on γN → ηN , for both proton and neutron targets, is described in detail and its implications for the search for N resonances much heavier than the dominant S 11 (1535) discussed. Though less is currently known about the production of the η or of ηπ pairs, these also offer tantalizing prospects in the search for the missing isobars. The more limited data available on pion-induced production are still necessary ingredients in the partial wave analysis discussed.The production of the η-meson in pp and pn collisions shows once again the strong influence of the S 11 (1535) isobar, which is in contrast to the relatively weak behaviour seen near threshold for η production. This difference is reflected in the important final state interaction effects of the η in nuclei that may even lead to this meson being "bound" in some systems. The evidence for this is reviewed for both γA and pA collisions. The inclusive photoproduction of η, η , and ηπ pairs from nuclei provides further information regarding the production mechanism and the interaction of the η and η with nuclei and the ηπ pairs may even allow access to low mass ηA systems that are forbidden in direct single-meson photoproduction.

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An analysis of eta -production via the p⁶Li to eta⁷Be reaction

Cited by 15 publications

References 33 publications

Experimental study of thep+6Li→η+7Bereaction 11.3 MeV above threshold

Experimental study of thep+6Li→η+7Bereaction 11.3 MeV above threshold

Search for quasi boundηmesons

Production of η and η′ mesons on nucleons and nuclei

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An analysis of eta -production via the p6Li to eta7Be reaction

Cited by 15 publications

References 33 publications

Experimental study of thep+6Li→η+7Bereaction 11.3 MeV above threshold

Experimental study of thep+6Li→η+7Bereaction 11.3 MeV above threshold

Search for quasi boundηmesons

Production of η and η′ mesons on nucleons and nuclei

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Product

Resources

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An analysis of eta -production via the p⁶Li to eta⁷Be reaction