Toward understanding of NA61/SHINE data on meson resonance production in Pi- C interactions

1. Toward understanding of NA61/SHINE data on meson resonance production in Pi- C interactions V. Uzhinsky, 15 Nov. 2017 Measurement of Meson Resonance Production in Pi- C Interactions at SPS energies (158 and 350 GeV/c) The NA61/SHINE Collaboration, Submitted to: Eur. Phys. J. C, CERN-EP-2017-105 May 24, 2017, Arxiv: 1705.08206 Measurements of Hadron Production in Pion-Carbon Interactions with NA61/SHINE at the CERN SPS. Raul R. Prado for the NA61/SHINE collaboration. Jul 25, 2017. Conference: C17-07-12 Proceedings. arXiv:1707.07902 [hep-ex]

2. Measurements of Hadron Production in Pion-Carbon Interactions with NA61/SHINE at the CERN SPS. Raul R. Prado for the NA61/SHINE collaboration Predictions of the model are very different! FTF is OK! 2

3. Measurement of Meson Resonance Production in Pi- C Interactions at SPS energies The NA61/SHINE Collaboration, Arxiv: 1705.08206 It is almost unclear what has been done in SIBYL 2.3c and EPOS-LHC! What is in QGSjet? Central question: why Rho and Om are so unusual? What has to be done in FTF? Predictions of the model are very different! FTF is not OK! 3

4. What can be done? QGSM without tuning? Promising results! Only problem – Normalization! 4

5. Main idea – Diffraction! Factorization and scaling in hadronic diffraction K. Goulianos and J. Montanha PHYSICAL REVIEW D59, 114017 (1999) M2=s (1-Xf) 5

6. Diffraction. Quark-parton interpretation? OPER One pioin exchange reaction L. A. Ponomarev, PEPAN v.7 (1976)186Description of Exclusive Processes in the Reggeized One-Pion Exchange Model Where is Pomeron? 6

7. Diffraction. Quark-parton interpretation? The Nucleon's virtual meson cloud and deep inelastic lepton scattering W. Koepf, L.L. Frankfurt, M. Strikman, Phys.Rev. D53 (1996) 2586-2598 ρ Testing the meson cloud model in inclusive meson production F. Carvalho, F. O. Duraes, F. S. Navarra, and M. Nielsen Phys. Rev. D60, 094015 (1999) 7

8. Diffraction. Quark-parton interpretation? Testing the meson cloud model in inclusive meson production F. Carvalho, F. O. Duraes, F. S. Navarra, and M. Nielsen Phys. Rev. D60, 094015 (1999) B.G. Zakharov 2017 Effect of meson cloud on the jet nuclear modification factor in pA collisions Pisma Zh.Eksp.Teor.Fiz. 105 (2017) no.4, 209-210 Monte Carlo Glauber wounded nucleon model with meson cloud J.Exp.Theor.Phys. 124 (2017) no.6, 860-876; arXiv:1611.0582 A proton = 60 % bare proton + 40 % N+Pi! 8

9. Diffraction. Quark-parton interpretation? Four-quark and six-quark components in the pion light front wave function and nonperturbative sea in the pion Antoni Szczurek, Harald Holtmann, Josef Speth Nucl. Phys. A605 (1996) 496-516 We discuss possible effects of "meson-meson" and "baryon-antibaryon" Fock components to the pseudoscalar meson light-front wave functions. We estimate the probability of the four quark components to be 10-26% and the probability of the six-quark components to be less than 0.3%. 9

10. Diffraction. Quark-parton interpretation? Four-quark and six-quark components in the pion light front wave function and nonperturbative sea in the pion Antoni Szczurek, Harald Holtmann, Josef Speth Nucl. Phys. A605 (1996) 496-516 In ~ 20% cases Pion = 2 Mesons! 10

11. Promising results of the first implementation More elaborated approach is needed! 11

12. Summary A realisticapproach – meson cloud of Pi-meson, has been found. A first rough implementation of the idea in FTF gives promising results. The most appropriate way to do all correctly -- Implement the idea in QGSM! Additional work is needed for Review of the literature (too many paper), Theoretical calculations and estimations Creation of a simulation algorithm, Testing and validation Expected time ~ 1 year!