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Some Remarks Concerning the Strong Interaction

Some Remarks Concerning the Strong Interaction. Hans Gerhard Fischer CERN. Layout of talk. 1. Introduction 2. Thirty-five years of collaboration with the Soltan Institute: The ISR period - conclusions in the mid-1980’s 3. Thirty-five years of collaboration with

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Some Remarks Concerning the Strong Interaction

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  1. Some Remarks Concerning the Strong Interaction Hans Gerhard Fischer CERN

  2. Layout of talk 1. Introduction 2. Thirty-five years of collaboration with the Soltan Institute: The ISR period - conclusions in the mid-1980’s 3. Thirty-five years of collaboration with the Soltan Institute: NA49 times - conclusions in the mid-2000’s 4. Some concluding remarks

  3. MOTTO 1 ´ It is a capital mistake to theorize before one has data ´

  4. MOTTO 1 ´ It is a capital mistake to theorize before one has data ´ Sherlock Holmes in: A scandal in Bohemia Sir Arthur Conan Doyle, 1892

  5. Find title « search » : 12000 entries since 1970

  6. Strong coupling constant as a function of momentum transfer αs Momentum transfer

  7. Pentaquark rush: number of papers per year

  8. T’Hooft’s String Configurations Wilczek Diquark 0.1fm «Stable configuration»

  9. A Diquark Scattering Model for High pT Proton Production in pp Collisions at the ISR Z.Phys. C28(1985)335 A.Breakstone, H.B.Crawley, G.M.Dallavalle, K.Doroba, D.Drijard, F.Fabbri, A.Firestone, H.G.Fischer, H.Frehse, W.Geist, G.Giacomelli, R.Gokieli, M.Gorbics, P.Hanke, M.Heiden, W.Herr, E.E.Kluge, J.W.Lamsa, T.Lohse, R.Mankel, W.T.Meyer, T.Nakada, M.Panter, A.Putzer, K.Rauschnabel, B.Rensch, F.Rimondi, M.Schmelling, G.Siroli, R.Sosnowski, M.Szczekowski, G.Ullaland, D.Wegener ABCDHW Collaboration

  10. Pentaquark rush: number of papers per year

  11. Observation of Charmed D Meson Production in pp Collisions Phys.Lett. B81(1979)250 D.Drijard, H.G.Fischer, W.Geist, R.Gokieli, P.G.Innocenti, V.Korbel, A.Minten, A.Norton, R.Sosnowski, S.Stein, O.Ullaland, H.D.Wahl (CERN) P.Bourtaud, M.DellaNegra, G.Fontaine, P.Frenkiel, C.Ghesqiere, D.Linglin, G.Sajot (College de France) H.Frehse, E.E.Kluge, M.Heiden, A.Putzer, J.Stiewe (Heidelberg) P.Hanke, W.Hofmann, M.Panter, K.Rauschnabel, J.Spengler, D.Wegener (Karlsruhe)

  12. Further Investigation of Beauty Baryon Production at the ISR Phys.Lett. B108(1982)361 D.Drijard, H.G.Fischer, H.Frehse, W.Geist, P.G.Innocenti, J.W.Lamsa, W.T.Meyer, A.Norton, O.Ullaland, H.D.Wahl (CERN) G.Fontaine, C.Ghesquiere, G.Sajot (College de France) W.Hofmann, M.Panter, K.Rauschnabel, J.Spengler, D.Wegener (Dortmund) P.Hanke, M.Heiden, E.E.Kluge, T.Nakada, A.Putzer (Heidelberg) M.DellaNegra, D.Linglin (LAPP Annecy) R.Gokieli, R.Sosnowski (Warsaw)

  13. Angular Distributions of Charged Particles between 30 and 90 Degrees at ISR Energies Phys.Lett. B39(1972)654 M.Breidenbach, G.Charpak, G.Coignet, D.Drijard, H.G.Fischer, G.Fuegge, Ch.Gottfried, H.Grote, A.Minten, F.Sauli, M.Szeptycka, E.G.H.Williams

  14. Angular distribution of charged particles (pseudorapidity)

  15. Pseudorapidity distributions at different energies

  16. The rising rapidity plateau

  17. Split Field Magnet Spectrometer

  18. Acceptance coverage of experiments in xF and pT SPS ISR RHIC LHC

  19. Inclusive Charged Particle Cross Sections from ppInteractions at ISR Energies Z.Phys. C69(1995)55 A.Breakstone, H.B.Crawley, A.Firestone, M.Gorbics, L.D.Isenhower, J.W.Lamsa, W.T.Meyer (Ames) R.Campanini, M.Cuffiani, G.M.Dallavalle, M.Deninno, F.Fabbri, G.Giacomelli,F.Rimondi, G.Siroli (Bologna) D.Drijard, H.G.Fischer, W.Geist, G.Mornacchi, M.Panter, O.Ullaland, R.Yeung (CERN) T.Lohse, R.Mankel, K.Rauschnabel, M.Schmelling, D.Wegener (Dortmund) H. Floege, H.Frehse, L.Gesswein, P.Hanke, M.Heiden, W.Herr, E.E.Kluge, T.Nakada, A.Putzer, B.Rensch (Heidelberg) K.Doroba,R.Gokieli, R.Sosnowski, M.Szczekowski (Warsaw) ABCDHW Collaboration

  20. Piminus xF Distributions from ISR

  21. Feynman x distributions of positive pions from ISR (CHLM Collaboration)

  22. ‘Hard Parton Scattering’ f(pT) = pT- 4 f(xT) xT = 2pT / √s Experimentally found at ISR: For pions f(pT) = pT-8f(xT) For protons f(pT) = pT-12 f(xT)

  23. Observation of Jet Structure in High p(T) Events at the ISRand the Importance of Parton Transverse Momentum Nucl.Phys. B127(1977)1 M.DellaNegra, D.Drijard, H.G.Fischer, G.Fontaine, H.Frehse, P.Frenkiel, C.Ghesquiere, R.Gokieli, P.Hanke, W.Hofmann, P.G.Innocenti, W.Isenbeck, E.E.Kluge, V.Korbel, D.Linglin, A.Minten, A.Norton, A.Putzer, G.Sajot, R.Sosnowski, S.Stein, J.Stiewe, H.D.Wahl, D.Wegener CCHK COLLABORATION

  24. Steepen up predicted pT distribution by introducing parton transverse momentum

  25. First order QCD with parton intrinsic transverse momentum

  26. One of the first complete  models of event structure with hard parton scattering

  27. Push limit of pT up to 12 GeV/c

  28. Add initial and final state gluon radiation

  29. Flavour Tagging of Parton Jets and Separationof Parton Subprocesses in Hard pp Collisions at the ISR Z.Phys.C25(1984)21 A.Breakstone, C.D.Buchanan, R.Campanini, H.B.Crawley, M.Dallavalle, K.Doroba, D.Drijard, F.Fabbri, A.Firestone, H.G.Fischer, H.Frehse, W.Geist, G.Giacomelli, R.Gokieli, M.Gorbics, P.Hanke, M.Heiden, W.Herr, E.E.Kluge, J.W.Lamsa, T.Lohse, W.T.Meyer, G.Mornacchi, T.Nakada, M.Panter, A.Putzer, K.Rauschnabel, F.Rimondi, R.Sosnowski, M.Szczekowski, O.Ullaland, D.Wegener ABCDHW Collaboration

  30. A Diquark Scattering Model for High pT Proton Production in pp Collisions at the ISR Z.Phys. C28(1985)335 A.Breakstone, H.B.Crawley, G.M.Dallavalle, K.Doroba, D.Drijard, F.Fabbri, A.Firestone, H.G.Fischer, H.Frehse, W.Geist, G.Giacomelli, R.Gokieli, M.Gorbics, P.Hanke, M.Heiden, W.Herr, E.E.Kluge, J.W.Lamsa, T.Lohse, R.Mankel, W.T.Meyer, T.Nakada, M.Panter, A.Putzer, K.Rauschnabel, B.Rensch, F.Rimondi, M.Schmelling, G.Siroli, R.Sosnowski, M.Szczekowski, G.Ullaland, D.Wegener ABCDHW Collaboration

  31. Introduce Hard Diquark Scattering and Form Factor f(pT) ~ pT- 4 (1+Q2/M2)– 1 f(xT) + diquark structure function + diquark fragmentation function fit M2 M2 ~ 10 – 20 GeV2

  32. Fits to the observed p/pion ratio as a function of transverse momentum p/pi ratio pT

  33. Conclusions from ISR 1970-1990 • Parton dynamics manifest in all areas of hadronic interactions: - rising central rapidity plateau (gluons, sea quarks) - forward particle production pictures valence partons (counting rules) - hard parton scattering leads to high pT production (perturbative QCD already applicable in the few GeV/c region) • Underlying mechanism: Intermediate partonic state present in all hadronic interactions, initiated by gluon exchange = colour exchange  strings

  34. MOTTO 2 ‘ It is the nature of an hypothesis, when once a man has conceived it, that it assimilates everything to itself as proper nourishment, and, from the first moment of your begetting it, it generally grows the stronger by everything you see, hear, read or understand.’ Tristram Shandy Laurence Sterne, 1750

  35. On the Hadronic Production of Lepton Pairs from Heavy Flavour Decay Z.Phys. C19(1983)159 H.G.Fischer and W.M.Geist (CERN)

  36. Lepton pair mass spectra fitted with combination of DDbar and BBar semileptonic decays Watch upper limits Of cross sections DDbar: 6 microbarn at SPS 25 microbarn at ISR BBbar 50 nbarn at sqrt(s)=27 GeV

  37. Layout of NA49 experiment Zestaw dużych Komór Projekcji Czasowej(TPC)detektory śladowe połączonez identyfikacją cząstek przezpomiar

  38. Inclusive production of charged pions in p+p collisions at 158 GeV/c beam momentum Eur.Phys.J. C45 (2006) 343 C.Alt, T.Anticic, B.Baatar, D.Barna, J.Bartke,L.Betev, H.Bialkowska, C.Blume, B.Boimska, M.Botje, J.Bracinik, P.Buncic, V.Cerny, P.Christakoglou, O.Chvala, P.Dinkelaker, J.Dolejsi, V.Eckardt, H.G.Fischer, D.Flierl,Z.Fodor, P.Foka, V.Friese, M.Gazdzicki, K.Grebieszkov, C.Hoehne, K.Kadija, A.Karev, M.Kliemant, S.Kniege, V.I.Kolesnikov, E.Kornas, R.Korus, M.Kowalski, I.Kraus, M.Kreps, M.vanLeeuwen, B.Lungwitz, M.Makariev, A.I.Malakhov, M.Mateev, G.L.Melkumov, M.Mitrovski, S.Mrowczynski, G.Palla, D.Panayotov, A.Petridis, R.Renfordt, M.Rybczinsky, A.Rybicki, A.Sandoval, N.Schmitz, T.Schuster, P.Seyboth, F.Sikler, E.Skrzypczak, G.Stefanek, R.Stock, H.Stroebele, T.Susa, J.Sziklai, P.Szymanski, V.Trubnikov, D.Varga, M.Vassiliou, G.I.Veres, G.Vesztergombi, D.Vranik, S.Wenig,, A.Wetzler, Z.Wlodarczyk, I.K.Yoo

  39. Inclusive pion cross sections as a function of pTfor different xF

  40. Inclusive pion cross sections as a function of xF for different pT

  41. Inclusive pion cross sections for p+Carbon minimum bias collisions

  42. Status of final data analysis

  43. Pions in pPb (1) n = 4.2

  44. Pions in pPb (2) n = 5.2

  45. Pions in PbPb 150<nch<300

  46. Pions in PbPb

  47. Linear plot of pion cross section in p+p interactions

  48. Contribution from known Delta++ and Delta+ cross section

  49. 3 dimensional plot of pi+ cross section Data M=1.232 GeV no Breit-Wigner Relativistic Breit-Wigner

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