1. V. Uzhinsky, A Galoyan (JINR, Dubna, Russia), 2015
FTF Model for Simulation of Antiproton-proton and Antiproton-nucleus Interactions
V. Uzhinsky, A Galoyan (JINR, Dubna, Russia), 2015
In 2002 Jim Ritman and Serge Gonzhur asked us to create background event generator
for PANDA experiment. We created DPM generator based on Dual Parton Model, and
after that annihilation module in GEANT4 (G4FTFAnnihilation, FTF).
Physics Book of PANDA Collaboration, Physics Performance Report for PANDA (AntiProton Annihilations at Darmstadt) Strong Interaction Studies with Antiprotons
Main problems: Estimation of the cross sections and string fragmentation.

2. PbarP processes, Reggeon approach (A.B. Kaidalov)
Calculation procedure:
V.V. Uzhinsky and A.S. Galoyan,
hep-ph/ (2002)
Cross-sections of various processes in
anti-P P interactions.
Implementation:
A.Galoian and V.Uzhinsky,
AIP Conf.Proc.796:79,2005
New Monte Carlo implementation of quark-
Gluon string model of anti-p p interactions. 2

3. Cross sections, process “b”, anti-di-quark – di-quark string creation
2-particle decay 4

4. 4 Cross sections, process “e”, anti-quark – quark string creation
LUND Model
Jetset 6.2 4

5. Cross sections, process “e”, anti-quark – quark string creation5

6. Cross sections, process “a”, 3 anti-quark – quark string creation
Main channels of anti-proton-proton interactions are reproduced! 6

7. Cross sections, process “g/h”, high energy interactions7

8. 8 Validation of FTF, PbarP annihilation at rest See more data in:
C. Amsler F. Myhrer
Ann. Rev. Nucl. Part. Sci.
v. 41 (1991) 219.
C. Amsler Rev. Mod. Phys. 70 (1998) 1293 8

9. 9 Pbar-P channel cross sections with baryons in final states
Results for ref: ref-03, see more details at: 9

10. Pbar P annihilation channel cross sections
Results for ref: ref-03 , see more details at: 10

11. Rapidity distributions of pi- mesons in Pbar-P interactions.
Results for inclusive cross sections of anti-Proton – Proton reactions
Rapidity distributions of pi- mesons in Pbar-P interactions.
G.D. Patel et al., Z. Phys. C - Particles and Fields 12,189, 1982
C.P. Ward et al., Nucl. Phys. B
E.E. Zabrodin et al., Phys. Rev.D, V52, N3, 1995 11

12. Results for inclusive cross sections of anti-Proton – Proton reactions
Rapidity distributions of pi+ mesons in Pbar-P interactions in
a wide energy range 12

13. Results for inclusive cross sections of anti-Proton–Proton reactions
PT2 of Pi+ mesons PT2 of Protons 13

14. E.V. Vlasov, Z. Phys. C - Particles and Fields 13, 95, 1982
Results for inclusive cross sections of anti-Proton–Proton reactions
Rapidity distributions of protons
E.V. Vlasov, Z. Phys. C - Particles and Fields 13, 95, 1982
G.D. Patel et al., Z. Phys. C - Particles and Fields 12,189, 1982
J. Chyla, Czech. J. Phys. B
E .G. Boos et al., Nucl. Phys. B , 1980 14

15. Description of p+p -> p + X reactions15
V. Uzhinsky, arXiv:
Effect of uu diquark suppression
in proton splitting in Monte Carlo
event generators
V. Uzhinsky, A. Galoyan
Phys.Rev. D91 (2015) 3,
xF distributions of protons in pp interactions at 158 GeV/c. Closed points are the
NA49 experimental data [5]. Lines are results of FTF model simulations: standard proton splitting (solid black), optimal diquark fragmentation function (dashed red), string inversion (dotted blue), diquark suppression (1/6 instead of 1/3) including the optimal fragmentation function and the string inversion (solid thick).

16. Antiproton-Nucleus interactions, cross sections for light nuclei
V. Uzhinsky, J. Apostolakis , A. Galoyan et al.
Phys. Lett. B705 (2011) 235
Anti-proton-nucleus cross sections implemented in Geant4 16
Production cross sections, results for ref: ref-03.

17. Antiproton-Nucleus interactions, cross sections for heavy nuclei
V. Uzhinsky, J. Apostolakis , A. Galoyan et al.
Phys. Lett. B705 (2011) 235
Anti-proton-nucleus cross sections implemented in Geant4 17
Production cross sections, results for ref: ref-03.

18. Correction of multiplicity of intra-nuclear collisions
Antibaryon-Nucleus interactions, inelastic interactions
A. Galoyan, Hyperfine Interactions: v. 215 (2013) 69
“Simulations of light antinucleus-nucleus interactions”
Low energy, Std. cascade.
Cascade+ Resonances
Model of nuclear disintegration
In high-energy nucleus nucleus
interactions.
K. Abdel-Waged, V.V. Uzhinsky
Phys.Atom.Nucl.60: ,1997.
High energy, Std. QGS.
Correction of multiplicity of intra-nuclear collisions
S.Yu. Shmakov, V.V. Uzhinsky,
Zeit. fur Phys. C36:77,1987.
Max. cross section method:
W.A. Coleman: Nucl. Sci. Eng. 32 (1968) 76 18

19. Antibaryon-Nucleus interactions, inelastic interactions
Correction of multiplicity of intra-nuclear collisions, HARP-CDP exp. data
Nmax=1, Plab=3, 5 GeV/c: Nmax=2, Plab=8 GeV/c: Nmax=3, Plab=12 19

20. Annihilation Pbar-A at rest.Cu U
Energy spectra of pi+ mesons produced in Pbar–D/Ne at rest
J. Rielberger, Nuclear Physics B (Proc Suppl ) 8 (1989) 20

21. P.L.McGaughey et al., Phys. Rev. Lett. V56, N20, 1986 21
Results of FTF validation for anti-Proton–Nucleus reactions inflight
Momentum distributions of Pi Momentum distributions of Protons
P.L.McGaughey et al., Phys. Rev. Lett. V56, N20, 1986 21

22. Angle and energy distributions of pions and protons in
Results of FTF validation for anti-Proton–Nucleus reactions inflight
Angle and energy distributions of pions and protons in
Pbar-C /Nbar-C interactions at projectile momentum 750 MeV.c
P.L.McGaughey et al., Phys. Rev. Lett. V56, N20, 1986 22

23. Kinetic energy spectra of neutrons produced in Pbar-Al, Pbar-Cu at
Results of FTF validation for anti-Proton–Nucleus reactions inflight
Kinetic energy spectra of neutrons produced in Pbar-Al, Pbar-Cu at
projectile momenta 1.22 GeV/c
T. von Egidy et al., Eur. Phys. J. A 8, 197 (2000) LEAR collab. data 23

24. Kinetic energy spectra of neutrons produced in Pbar-Ta, Pbar-U at
Results of FTF validation for anti-Proton–Nucleus reactions inflight
Kinetic energy spectra of neutrons produced in Pbar-Ta, Pbar-U at
projectile momenta 1.22 GeV/c
T. von Egidy et al., Eur. Phys. J. A 8, 197 (2000) LEAR collab. data 24

25. 25 Leading antiproton spectra in PbarA interactions at high energies
pA-interactions at 120 GeV/c,R. Bailey et al., Z. Phys. C29 (1985) 1. 25

26. Rapidity Ch+, Rapidity Ch- mesons
Results for FTF validation for Pbar-Nucleus interactions at p= 200 GeV/c
Rapidity Ch+, Rapidity Ch- mesons
Multi-particle production on hydrogen, argon and xenon targets in a streamer chamber by 200 GeV/c proton and antiproton beams. De Marzo et al. Phys. Rev. D26 (1982) 1019 26

27. Summary
DPM model has been extended to low energies.
A new tuning of model parameters have been done.
Good description of Pbar+P interactions has been reached.
Anti-proton-nucleus cross sections have been calculated and parameterized.
Extension of the model on anti-proton-nucleus reactions has been proposed.
Promising results have been obtained.
Extended model has been implemented in Geant4 toolkit. 27

28. FTF, Antibaryon-Baryon Interactions28

29. Process cross sections29