A Crucial Test for QCD : The Time-Like E.M. form Factors of the Neutron

  • Rinaldo Baldini Ferroli Celio
Part of the The Subnuclear Series book series (SUS, volume 27)

Abstract

The neutron e.m. time-like form factors (FF) have never been measured and the purpose of this talk is to demonstrate that this measurement is mandatory for understanding the nucleon structure. Actually the nucleon structure needs still to be investigated (as it has been proved by the recent, surprising, EMC results[1]), in spite of the overwhelming number of data collected in elastic and inelastic lepton-nucleon scattering. The current nucleon models, which reproduce either the proton FF and the neutron space-like FF, are in bad disagreement in providing the cross section for
$${e^ + }{e^ - } \to n\bar n$$
in the range experimentally accessible, with present storage rings: 4M N 2 ≤ Q2 ≤ 10 GeV2.

Keywords

Helium Convolution Calorimeter Editing 

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References

  1. [1]
    European Muon Collaboration, Phys.Lett. B206:364 (1988).Google Scholar
  2. [2]
    M. Gourdin, Phys. Rep. 11:29 (1974).CrossRefGoogle Scholar
  3. [3]
    F. Halzen, A.D. Martin, ‘Quarks and Leptons’, Wiley (1984)Google Scholar
  4. [4]
    S. R. Amendolia, B. Badelek, G. Batignani, G.A. Beck, E.H. Bellamy, E. Bertolucci, D. Bettoni, H. Bilokon, A. Bizzeti, G. Bologna, L. Bosisio, C. Bradaschia, M. Budinich, M. Dell’Orso, B. D’Ettore Piazzoli, M. Enorini, F.L. Fabbri, F. Fidecaro, L. Foà, E. Focardi, S.G.F. Frank, P. Giannetti, A. Giazzotto, M.A. Giorgi, J. Harvey, G.P. Heath, M.P.J. Landon, P. Laurelli, F. Liello, G. Mannocchi, P.V. March, P.S. Marrocchesi, D. Menasci, A. Menzione, E. Meroni, E. Milotti, L. Moroni, P. Picchi, F. Ragusa, L. Ristori, L. Rolandi, C. Saltmarsh, A. Saoucha, L. Satta, A. Scribano, A. Stefanini, J.A. Strong, R. Tenchini, G. Tonelli, G. Triggiani, A. Zallo, Phys. Lett. 138B:454 (1984).CrossRefGoogle Scholar
  5. [5]
    P. Dal Piaz, private communication.Google Scholar
  6. [6]
    S. Platchkov, A. Amroun, S. Auffret, J.M. Cavedon, P. Dreux, J. Duclos, B. Frois, D. Goutte, H. Hachemi, J. Martino, X.H. Phan, I. Sick, Proc. XII Conf. on Few Body problems in Physics Vancouver (1989).Google Scholar
  7. [7]
    G.F. Walters, Internal Note NIKHEF-H/84-5 (1984).Google Scholar
  8. [8]
    D. Bisello, G. Busetto, A. Castro, M. Nigro, L. Pescara, M. Posocco, P. Sartori, L. Stanco, Z. Ajaltouni, A. Falvard, J. Jousset, B. Michel, J.C. Montret, A. Antonelli, R. Baldini, S. Calcaterra, M. Schioppa, J.E. Augustin, G. Cosme, F. Couchot, B. Dudelzak, F. Fulda, G. Grosdidier, B. Jean-Marie, S. Jullian, D. Lalanne, V. Lepeltier, F. Mane, C. Paulot, R. Riskalla, Ph. Roy, G. Szklarz, Internal Note LAL 88-58 (1988).Google Scholar
  9. [9]
    S. J. Brodsky, G.R. Farrar, Phys. Rev. D 11:1309 (1975).CrossRefGoogle Scholar
  10. [10]
    S.J. Brodsky, B.T. Chertok, Phys. Rev. D 14:3003 (1976).CrossRefGoogle Scholar
  11. [11]
    J.D. Stack, Phys. Rev. 164:1904 (1967).CrossRefGoogle Scholar
  12. [12]
    V.A. Matveev, R.M. Muradyan, A.N. Tavkhelidze, Lett. Nuovo Cimento 7:719 (1973).CrossRefGoogle Scholar
  13. [13]
    V.L. Chernyak, I.R. Zhitnitsky, Nucl. Phys. B 246:52 (1984).CrossRefGoogle Scholar
  14. [14]
    Chueng-Ryong Ji, Proc. Summer School of Computational Atomic and Nucl. Phys. (1989).Google Scholar
  15. Chueng-Ryong Ji, A.F. Sill, R.M. Lombard-Nelsen, Internal Note SLAC-PUB-4068 (1986).Google Scholar
  16. [15]
    M.A. Shifman, A.I. Vainshtain, V.I. Zakharov, Nucl. Phys. B 147:385 (1979).CrossRefGoogle Scholar
  17. [16]
    J.S. Bell, R.A. Bertimann, Internal Note TH 2880-CERN (1980).Google Scholar
  18. J.S. Bell, R.A. Bertimann, Nucl. Phys. B 187:285 (1981).CrossRefGoogle Scholar
  19. J.S. Bell, R.A. Bertimann, Internal Note TH 3540-CERN (1983).Google Scholar
  20. [17]
    Chueng-Ryong Ji, A.F. Sill, Phys. Rev. D 34:3350 (1986).CrossRefGoogle Scholar
  21. [18]
    G. Martinelli, C.T. Sachrajda, Internal Note CERN TH 5042/88 (1988).Google Scholar
  22. [19]
    Particle Data Group, Rewiev of Particle Properties, Phys. Lett. B 204 (1988)Google Scholar
  23. [20]
    S.J. Brodsky, G.P. Lepage, San Fu Tuan, Phys.Rev. Lett. 59:621 (1987).CrossRefGoogle Scholar
  24. [21]
    P.G.O. Freund, Y. Nambu, Phys. Rev. Lett. 34:1645 (1975).CrossRefGoogle Scholar
  25. [22]
    J.J. Sakurai, Ann. of Phys. 11:1 (1960).CrossRefGoogle Scholar
  26. [23]
    R. Gatto, N. Cabibbo, Phys. Rev. 124:1577 (1961).CrossRefGoogle Scholar
  27. [24]
    A. Bramon, E. Etim, M. Greco, Phys. Lett. B 41:609 (1972).CrossRefGoogle Scholar
  28. J.J. Sakurai, Phys. Lett. B 46:207 (1973).CrossRefGoogle Scholar
  29. [25]
    G. Veneziano, Nuovo Cim. 57A:190 (1986).Google Scholar
  30. G. Veneziano, Phys. Rep. 9 (1974).Google Scholar
  31. [26]
    J.G. Korner, M. Kuroda, Phys. Rev. D 16:2165 (1977).CrossRefGoogle Scholar
  32. [27]
    M. Greco, Nucl. Phys.B 63:398 (1973).CrossRefGoogle Scholar
  33. [28]
    P. Cesselli, M. Nigro, C. Voci, Proc. of Workshop on Physics at LEAR Erice (1982).Google Scholar
  34. [29]
    A. Donnachie, Internal Note CERN TH 5246/88 (1988).Google Scholar
  35. [30]
    D. Bisello, G. Busetto, M. Nigro, L. Pescara, M. Posocco, P. Sartori, L. Stanco, Z. Ajaltouni, A. Falvard, J. Jousset, B. Michel, J.C. Montret, R. Baldini, G. Capon, S. Calcaterra, J.E. Augustin, G. Cosme, F. Couchot, B. Dudelzak, F. Fulda, B. Grelaud, G. Grosdidier, B. Jean-Marie, S. Jullian, D. Lalanne, V. Lepeltier, F. Mane, C. Paulot, R. Riskalla, Ph. Roy, G. Szklarz, Internal Note LAL 83-21 (1983).Google Scholar
  36. [31]
    D. Bisello, G. Busetto, M. Nigro, L. Pescara, M. Posocco, P. Sartori, L. Stanco, Z. Ajaltouni, A. Falvard, J. Jousset, B. Michel, J.C. Montret, A. Antonelli, R. Baldini, S. Calcaterra, G. Capon, M. schioppa, J.E. Augustin, G. Cosme, F. Couchot, B. Dudelzak, F. Fulda, B. Grelaud, G. Grosdidier, B. Jean-Marie, S. Jullian, D. Laianne, V. Lepeltier, F. Mane, C. Paulot, R. Riskalla, Ph. Roy, G. Szklarz, Phys.Lett.B 212:133 (1988).CrossRefGoogle Scholar
  37. S. Fukui et al., Phys.Lett.B 202:441 (1988).CrossRefGoogle Scholar
  38. [32]
    T. Massam, A. Zichichi, Nuovo Cim. 43:1137 (1966).CrossRefGoogle Scholar
  39. F. Iachello, A.D. Jackson, A. Lande, Phys. Lett. 43B:191 (1973).CrossRefGoogle Scholar
  40. [33]
    R.K. Bhaduri, ‘Model of Nucleon’, Addison-Wesley (1988).Google Scholar
  41. [34]
    R. Machleidt, K. Holinde, Ch. Elster, Phys.Rep. 149 (1987).Google Scholar
  42. [35]
    R. Feist, Internal Note DESY 73/56 (1973).Google Scholar
  43. [36]
    E. Etim, A. Malecki, Internal Note LNF-89-023 (1989).Google Scholar
  44. [37]
    E.D. Bloom, F.J. Gilman, Phys. Rev. Lett. 25:1140 (1970).CrossRefGoogle Scholar
  45. [38]
    S. Dubnicka, E. Etim, Internal Note LNF-89/013(PT) (1989).Google Scholar
  46. [39]
    B.V. Geshkenbein, M.V. Terentyev, Internal Note ITEP-3 (1984).Google Scholar
  47. [40]
    M. Van Der Velde, M.I. Polikarpov, Jour. Nucl. Phys. 35:180 (1982).Google Scholar
  48. [41]
    B.O. Kerbikov, I.S. Shapiro, Internal Note ITEP-159 (1978).Google Scholar
  49. [42]
    R. Baldini Ferroli Celio, Nucleon Structure Workshop Frascati (October 1988) in press.Google Scholar
  50. [43]
    O.D. Dalkarov, V.G. Ksenzov, Pis’ma v ZhETF 30:74 (1979).Google Scholar
  51. O.D. Dalkarov, K.V. Protasov, Mod. Phys. Lett.A 4:1203 (1989).CrossRefGoogle Scholar
  52. [44]
    H. Fritzsch, Internal Note CERN TH 5569/89 (1989).Google Scholar
  53. G. Hohler, E. Pietarinen, I. Sabba-Stefanescu, F. Borkowski, G.G. Simon, V.H. Walther, R.D. Wendling, H. Genz, G. Hohler, Phys. Lett. B 61: 389 (1976).CrossRefGoogle Scholar
  54. R.L. Jaffe, Phys. Lett. B 229:275 (1989).CrossRefGoogle Scholar
  55. [45]
    M. Gari, W. Krumpelmann, Internal Note SLAC-PUB-3398 (1984).Google Scholar
  56. [46]
    T.H.R. Skyrme, Proc. Royal Soc.A 260:127 (1961).CrossRefGoogle Scholar
  57. [47]
    E. Witten, Nucl. Phys.B 223:422 (1983).CrossRefGoogle Scholar
  58. [48]
    S. Coleman, S.L. Glashow, Phys. Rev. Lett. 6:423 (1961).CrossRefGoogle Scholar
  59. [49]
    M. Gell-Mann, Y. Ne’eman, ‘The Eightfold Way’, Benjamin (1964).Google Scholar
  60. [50]
    M.E. Biagini, E. Pasqualucci, to be published.Google Scholar
  61. [51]
    M. Fukugita, J. Kwiecinski, Internal Note RL-79-045 (1979).Google Scholar
  62. [52]
    M. Claudson, S.L. Glashow, M.B. Wise, Phys.Rev. 25:1345 (1982).CrossRefGoogle Scholar
  63. [53]
    FENICE Collaboration, Internal Note LNF-87/18(R)(1987).Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • Rinaldo Baldini Ferroli Celio
    • 1
  1. 1.INFN - Laboratori Nazionali di FrascatiFrascatiItaly

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