Additivity of Scattering Phase Shifts

1974 ◽  
Vol 52 (24) ◽  
pp. 2445-2450
Author(s):  
K. K. Bajaj ◽  
Y. Nogami
Keyword(s):  
Partial Wave ◽  
Impact Parameter ◽  
Phase Shifts ◽  
Trivial Case ◽  
Wave Phase ◽  
Parameter Representation ◽  
Scattering Phase ◽  
Scattering Phase Shifts ◽  
The Impact

The additivities of the partial wave phase shifts (APP) and of the phase in the impact parameter representation (AIP) are examined for models of scattering from two centers which simulate nucleon–deuteron and pion–deuteron scatterings. It is shown that the AIP, which essentially leads to the Glauber approximation, holds very well, whereas the APP fails except for a trivial case.

DIBARYON SIGNALS IN NN SCATTERING DATA AND FURTHER MEASUREMENT AT COSY, LEPS AND CSR

2009 ◽  
Vol 18 (02) ◽  
pp. 293-301
Author(s):  
FAN WANG ◽  
JIALUN PING ◽  
HONGXIA HUANG ◽  
HOURONG PANG ◽  
CHUN-WA WONG
Keyword(s):  
Phase Shifts ◽  
Scattering Data ◽  
Channel Coupling ◽  
Production Threshold ◽  
Screening Model ◽  
Wave Phase ◽  
Shift Analysis ◽  
Scattering Phase ◽  
Scattering Phase Shifts ◽  
Quark Models

The N Δ and ΔΔ dibaryon resonances are studied by calculating the NN scattering phase shifts with explicitly coupling these dibaryon channels in a multi-channel coupling calculation with two quark models. These quark models, the chiral quark model and quark delocalization color screening model, describe the NN S-, D-wave phase shifts below the π production threshold quantitatively well. Both quark models predict that the 1D2 resonance discovered in NN partial wave phase shift analysis and the J = 1 or 3 isoscalar resonance recently reported by CELSIUS-WASA Collaboration are N Δ5S2 and ΔΔ7S3 resonance respectively. Further measurements at COSY, LEPS and Lanzhou Cooling Storage Ring (CSR) to check the ΔΔ resonance are discussed.

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