Single pion production in proton-proton collisions according to the one-particle exchange model

1961 ◽  
Vol 22 (1) ◽  
pp. 123-134 ◽  
Author(s):  
G. Da Prato
1996 ◽  
Vol 603 (3-4) ◽  
pp. 387-414 ◽  
Author(s):  
A. Engel ◽  
R. Shyam ◽  
U. Mosel ◽  
A.K. Dutt-Mazumder

1968 ◽  
Vol 58 (2) ◽  
pp. 475-499 ◽  
Author(s):  
L. Bodini ◽  
L. Casè ◽  
J. Kidd ◽  
L. Mandelli ◽  
V. Pelosi ◽  
...  

2007 ◽  
Vol 22 (02n03) ◽  
pp. 509-513 ◽  
Author(s):  
◽  
T. Skorodko ◽  
M. Bashkanov ◽  
D. Bogoslowsky ◽  
H. Calén ◽  
...  

At CELSIUS-WASA the two-pion production in proton-proton collisisons has been measured exclusively from threshold up to the energy regime, where both of the collision partners are expected to be excited to the Δ state. The measurements constitute the first kinematically complete data samples of solid statistics in this energy range. Most of the data have been obtained for the π+π- and π0π0channels. Whereas at near-threshold energies the differential distributions can be succesfully explained by chiral dynamics and Roper excitation, respectively, the data for the π+π- channel in the ΔΔ region can be described only, if the special configuration (ΔΔ)0+ is assumed. The data for the π0π0 channel moreover exhibit a low-mass enhancement in the π0π0 invariant mass spectrum, which is reminiscent of the ABC-effect found in double-pionic fusion to light nuclei.


2004 ◽  
Vol 21 (2) ◽  
pp. 303-312 ◽  
Author(s):  
V. V. Sarantsev ◽  
K. N. Ermakov ◽  
V. I. Medvedev ◽  
T. S. Oposhnyan ◽  
O. V. Rogachevsky ◽  
...  

2009 ◽  
Vol 24 (02n03) ◽  
pp. 446-449
Author(s):  
◽  
H. PETTERSSON ◽  
M. BASHKANOV ◽  
D. BOGOSLOWSKY ◽  
H. CALÉN ◽  
...  

The production of η mesons at an excess energy of 72 MeV has been studied in the reaction pp → pp(η)γγ. It is shown that a simple model with Pp final states included reproduces observed differential distributions better than the same model restricted to Ss , Sd and Ds final states. The strong influence of the Pp states could be taken as an indication of ρ dominance within an one boson exchange model for the excitation of N *(1535).


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