scholarly journals STUDY OF THE η-7Be INTERACTION NEAR THRESHOLD IN p-6Li FUSION

2009 ◽  
Vol 18 (05n06) ◽  
pp. 1383-1388
Author(s):  
N. J. UPADHYAY ◽  
N. G. KELKAR ◽  
K. P. KHEMCHANDANI ◽  
B. K. JAIN
Keyword(s):  
Wave Function ◽  
Final State Interaction ◽  
Radial Wave Function ◽  
State Interaction ◽  
Nuclear Medium ◽  
Final State ◽  
Radial Wave ◽  
Near Threshold

We present a calculation for η production in the p-6Li fusion near threshold including the η-7Be final state interaction (FSI). We consider the 6Li and 7Be nuclei as α-d and α-3He clusters respectively. The calculations are done for the lowest states of 7 Be with [Formula: see text] resulting from the L = 1 radial wave function. The η-7Be interaction is incorporated through the η-7BeT–matrix, constructed from the medium modified matrices for the η-3He and η-α systems. These medium modified matrices are obtained by solving few body equations, where the scattering in nuclear medium is taken into account.

Φ PRODUCTION IN pp COLLISIONS

2009 ◽  
Vol 24 (02n03) ◽  
pp. 564-567
Author(s):  
ALEXANDER SIBIRTSEV
Keyword(s):  
Cross Section ◽  
Final State Interaction ◽  
State Interaction ◽  
Rule Violation ◽  
Pp Collisions ◽  
Final State ◽  
Baryonic Resonance ◽  
Low Energies ◽  
Ozi Rule ◽  
Near Threshold

The data for near-threshold cross section for the reaction pp → ppɸ published by the DISTO and ANKE Collaboration are analyzed in order to evaluate the OZI ratio at low energies by taking into account corrections from the kinematics and the final-state interaction. Combining these new data with the few measurements available at higher energies the limit for the OZI rule violation is evaluated and the possible contribution from a five-quark baryonic resonance coupled to the ɸp system is estimated.

Near-threshold incoherent pion photoproduction on the deuteron with final-state interaction effects

2019 ◽  
Vol 411 ◽  
pp. 167990 ◽  
Author(s):  
E.M. Darwish ◽  
M.M. Almarashi ◽  
E.M. Mahrous ◽  
M.A. Hassanain ◽  
M. Saleh Yousef
Keyword(s):  
Final State Interaction ◽  
Interaction Effects ◽  
Pion Photoproduction ◽  
State Interaction ◽  
Final State ◽  
Near Threshold

THE FINAL STATE INTERACTION IN THE REACTIONS pp→K+(Λp) AND pp→π+(np)

2005 ◽  
Vol 20 (02n03) ◽  
pp. 291-300 ◽  
Author(s):  
F. HINTERBERGER ◽  
S. N. NEDEV ◽  
R. SIUDAK
Keyword(s):  
Wave Function ◽  
Mass Spectrum ◽  
Enhancement Factor ◽  
Final State Interaction ◽  
Invariant Mass Spectrum ◽  
State Interaction ◽  
Final State ◽  
Missing Mass ◽  
Section Data ◽  
Scattering Lengths

The reactions pp→K+(Λp) and pp→π+(np) are measured with high missing mass resolution using the spectrometer BIG KARL at COSY. The pp→K+(Λp) missing mass spectrum is analyzed with respect to the final state interaction near the Λp production threshold. The observed spectrum can be described by factorizing the reaction amplitude in terms of a production amplitude and a final state enhancement factor. Parametrizing the enhancement factor in terms of the inverse Jost function allows a direct extraction of the low-energy phase-equivalent potential parameters. Constraints on the singlet and triplet scattering lengths and effective ranges can be deduced by fitting simultaneously the Λp invariant mass spectrum and the total cross section data of the free Λp scattering. A similar analysis shows that the reaction pp→π+(np) is dominated by the triplet contribution to the (np) final state interaction. An upper limit of a possible singlet contribution is deduced. Finally, the reaction pp→π+(np) allows to test the Fäldt-Wilkin extrapolation theorem where the triplet (np) continuum wave function is extrapolated to the wave function of the deuteron.

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