Improvement of DPM Generator

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Presentation transcript:

Improvement of DPM Generator Dual Parton Model (Quark-Gluon String Model) A. Galoyan, JINR, Dubna, Russia 1. Improvement of inclusive spectra: meson spectra baryon spectra 2. New parameterization of elastic scattering hadronic scattering Coulomb scattering 3. Conclusion

Improvement of DPM Generator Results of DPM on inelastic pbar-p in PandaRoot

Improvement of DPM Generator Results of DPM on inelastic pbar-p in PandaRoot

Improvement of DPM Generator A.Galoyan, V.Uzhinsky, AIP Conf. Proc. 796 (2005) 79, Bonn Dual Parton Model (Quark-Gluon String Model) Process "a" is responcible for multi-particle production at low energies 3Pi0, Pi0 Pi+ Pi-, …. Process "b" leads to 2-baryon final states, like Lambda-Lambda-Bar, Delta-Delta-Bar and so on. Process "c" gives 2-particles states at low energies - Pi+Pi-, Pi0Pi0, K+K-

A.Galoyan, V.Uzhinsky, AIP Conf. Proc. 796 (2005) 79, Bonn Improvement of DPM Generator Process “h” - low mass diffraction Process “g” is going through pomeron exchange. A.Galoyan, V.Uzhinsky, AIP Conf. Proc. 796 (2005) 79, Bonn

Improved DPM - some results. Tuning of string junction annihilation (a) and quark-antiquark annihilation (b). Implementation of LMD (h) Subroutine init.f

Improved DPM - some results. Tuning of string junction annihilation (a) and quark-antiquark annihilation (b). Implementation of LMD (h) Subroutine init.f

Improved DPM - some results.

Improved hadronic elastic scattering in DPM-generator

New parameters for hadronic elastic scattering in DPM-generator dσ ⁄ dt = A1 (exp (B1 t/2 – A2 exp(B2 t/2)2 + A3 exp(B2 t)

Improved elastic scattering - some results.

Improved elastic scattering - some results.

Improved elastic scattering - some results.

Improved elastic scattering - some results.

Improved elastic scattering - some results.

Coulomb, interference, hadronic parts of elastic scattering in DPM generator.

Results of the new version of DPM and experimental data E760 collab.

Conclusion 1 Fine tuning of DPM is performed in a part. 2 Spectra of mesons are Improved. 3 Low mass diffraction is implemented for improvement of spectra of protons and antiprotons. 4 Simulation of binary channels is Included. The consideration of these channels will be done. 5 Parametrization of elastic scattering is improved. 6 Smearing of a beam is implemented in DPM (results are prepared and will be presented). 7 Draft of a paper on the new parameterization in DPM is prepared.