Analyzing power of Inverse Diproton Photodisintegration at Intermediate Energies


  • B. Baimurzinova Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, RU-141980 Dubna



Diproton, analyzing power, hard bremsstrahlung


The reaction γ + {pp}s p + p, where diproton {pp}s is a proton pair in 1S0 state, is a spin-isospin partner of the fundamental reaction of deuteron photodisintegration. The inverse reaction, the hard bremsstrahlung p + p γ + {pp}s, has been observed with the ANKE spectometer at COSY-Jülich. In addition to differential cross section measured earlier, in this work it's analyzing power has been measured at forward angles at several energies in the region of Δ(1232) isobar exictation. 


[1] S. Dymov et al.Deuteron breakup pd→{pp}sn with forward emission of a fast 1S0 diproton// Phys. Rev. C. – 2010. –Vol. 81. –P. 044001.
[2] V. Kurbatov et al.Energy dependence of forward 1S0 diproton production in the pp→ppπ0 reaction// Phys. Lett. B. – 2008. – Vol. 661. –P. 22.
[3] D. Tsirkov et al.Differential cross section and analysing power of the pp→{pp}sπ0 reaction at 353 MeV// Phys. Lett. B. – 2012. – Vol. 712. – P. 370.
[4] V. Komarov et al.Observation of Inverse Diproton Photodisintegration at Intermediate Energies// Phys. Rev. Lett. – 2008. – Vol. 101. – P. 102501.
[5] D. Tsirkov et al.Energy dependence of hard bremsstrahlung production in proton–proton collisions in the Δ(1232) region// J. Phys. G: Nucl. Part. Phys. – 2010. –Vol. 37. –P. 105005.
[6] S. Barsov et al.ANKE, a new facility for medium energy hadron physics at COSY-Jülich// Nucl. Instrum. Methods. Phys. Res. – 2001. –Vol. 462. –P. 364.
[7] P. Wilhelm et al. Signatures from polarization observables for photon absorption on a 1S0 proton pair // Nucl. Phys. A. – 1996. –Vol 597. – P. 613.
[8] P. Wilhelm et al. Photon absorption on a proton-proton pair in He3// Phys. Lett. C. – 1995. – Vol.51. – P. 2841.






Nuclear Physics and Related Techology