1. Improvement of FTF (FRITIOF) Model in GEANT-4

2. PP->P+X First results

3. pA->p+X First results

4. Particle multiplicities in pp-interactions Comparison with exp. data

5. Particle multiplicities in pp-interactions Comparison with exp. data

6. Particle multiplicities in pp-interactions Comparison with exp. data

7. New variant of FTF model PP-interactions at 400 GeV/c, M. Aguilar-Benitz et al., (NA-27 Collab.) Zeit. fur Phys., C50 (1991) 405. Comparison with exp. data

8. Comparison with exp. data

9. Comparison with exp. data

10. Comparison with exp. data pp-interactions are described quite well!

11. p+Be, p+Au interactions at 14.6 GeV/c T. Abbott et al. (E-802 Callab.), Phys. Rev. D45 (1992) 3906 Comparison with exp. data In FTF model probabilities of intra-nuclear collisions were taken from QGSM. In the original FRITIOF model - from Glauber approximation

12. Comparison with exp. data There is a problem with description of rapidity distributions

13. 9 GeV Check of string fragmentation 3 GeV

14. Check of string fragmentation

15. Check of fragmentation function – f(z) F(z)~(1/z)(1-z) exp(- a*mt^2)

16. Check of string fragmentation. Single string fragmentation. π-mesons

17. Check of string fragmentation. Single string fragmentation. π-mesons There is a clear forward-backward assymetry in the FRITIOF model

18. Check of string fragmentation. Single string fragmentation. protons Very strange results from the FRITIOF model!

19. Check of string fragmentation. Single string fragmentation. protons There is a weak leading particles effect in FTF

20. Conclusion We have some improvement of FTF Implemented 1 2 Glauber calculations are implemented 3 Inclusion of the leading particles effect Is in progress We hope on the better results