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Search for the exotic Θ+ resonance in the NOMAD experiment

  • Regular Article - Experimental Physics
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Abstract

A search for exotic Θ+ baryon via Θ+→p+K0 S decay mode in the NOMAD νμN data is reported. The special background generation procedure was developed. The proton identification criteria are tuned to maximize the sensitivity to the Θ+ signal as a function of xF which allows to study the Θ+ production mechanism. We do not observe any evidence for the Θ+ state in the NOMAD data. We provide an upper limit on Θ+ production rate at 90% CL as 2.13×10-3 per neutrino interaction.

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Authors and Affiliations

  1. LAPP, Annecy, France

    G. Bassompierre, J.-M. Gaillard, M. Gouanère, A. Krasnoperov, J.-P. Mendiburu, P. Nédélec, H. Pessard & D. Sillou

  2. Johns Hopkins Univ., Baltimore, MD, USA

    B. Blumenfeld, J. Long & D. Steele

  3. Harvard Univ., Cambridge, MA, USA

    A. Bueno, D. Daniels, T. Dignan, G.J. Feldman, D. Hubbard, P. Hurst, S.R. Mishra & F.V. Weber

  4. Univ. of Calabria and INFN, Cosenza, Italy

    L. La Rotonda & M. Valdata-Nappi

  5. Dortmund Univ., Dortmund, Germany

    A. Geiser, D. Geppert, C. Gößling, D. Pollmann, P. Riemann, B. Schmidt, T. Schmidt, T. Weisse & K. Zuber

  6. JINR, Dubna, Russia

    O. Samoylov, D. Naumov, S. Bunyatov, A. Chukanov, O. Klimov, A. Krasnoperov, V. Lyubushkin, Y. Nefedov, B. Popov, V. Tereshchenko & V. Valuev

  7. Univ. of Florence and INFN, Florence, Italy

    D. Naumov, G. Graziani, E. Iacopini, A. Lupi & A. Marchionni

  8. CERN, Geneva, Switzerland

    D. Autiero, I. Bird, L. Camilleri, A. Cervera-Villanueva, G. Conforto, A. De Santo, L. Di Lella, E. do Couto e Silva, D. Ferrère, E. Gangler, A. Geiser, S. Gninenko, J.-J. Gomez-Cadenas, A. Grant, J. Kokkonen, L. Linssen, R. Petti, A. Placci, C. Roda, A. Rubbia, B. Schmidt, F.J.P. Soler, U. Stiegler, S.N. Tovey, E. Tsesmelis, G. Vidal-Sitjes, F.V. Weber & F.F. Wilson

  9. University of Lausanne, Lausanne, Switzerland

    K. Benslama, I. Bird, H. Degaudenzi, C. Joseph, F. Juget, C. Nguyen-Mau, G. Sozzi, D. Steele, M. Tareb-Reyes, M.-T. Tran, L. Vacavant & J.-M. Vieira

  10. UCLA, Los Angeles, CA, USA

    A. Cardini, R. Cousins, V. Valuev & T. Vinogradova

  11. University of Melbourne, Melbourne, Australia

    R. Challis, N. Hyett, N. Kent, G.F. Moorhead, C. Poulsen, M. Sevior,  G.N. Taylor, S.N. Tovey & L.J. Winton

  12. Inst. for Nuclear Research, INR Moscow, Moscow, Russia

    S. Gninenko, M. Kirsanov, A. Kovzelev, A. Polyarush & A. Toropin

  13. Univ. of Padova and INFN, Padova, Italy

    M. Baldo-Ceolin, F. Bobisut, G. Collazuol, M. Contalbrigo, D. Gibin, A. Guglielmi, S. Lacaprara, M. Laveder, M. Mezzetto, L. Rebuffi, A. Sconza & P. Zuccon

  14. LPNHE, Univ. of Paris VI and VII, Paris, France

    P. Astier, M. Banner, J. Dumarchez, E. Gangler, C. Lachaud, A. Letessier-Selvon, J.-M. Levy, B. Popov, K. Schahmaneche, A.-M. Touchard & F. Vannucci

  15. Univ. of Pavia and INFN, Pavia, Italy

    P.W. Cattaneo, C. Conta, R. Ferrari, M. Fraternali, A. Kovzelev, A. Lanza, R. Petti, G. Polesello, F. Salvatore & V. Vercesi

  16. Univ. of Pisa and INFN, Pisa, Italy

    V. Cavasinni, T. Del Prete, A. De Santo, V. Flaminio & C. Roda

  17. Roma Tre University and INFN, Rome, Italy

    D. Orestano & F. Pastore

  18. DAPNIA, CEA Saclay, Saclay, France

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  19. Univ. of South Carolina, Columbia, SC, USA

    A. Godley & S.R. Mishra

  20. Univ. of Sydney, Sydney, Australia

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  21. Univ. of Urbino and INFN Florence, Urbino, Italy

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  22. IFIC, Valencia, Spain

    A. Cervera-Villanueva, J.-J. Gomez-Cadenas & J. Hernando

  23. Rudjer Bošković Institute, Zagreb, Croatia

    B. Lakić, A. Ljubičić & M. Stipčević

  24. ETH Zürich, Zürich, Switzerland

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Authors
  1. O. Samoylov
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  2. D. Naumov
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  3. V. Cavasinni
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The Nomad Collaboration

Corresponding author

Correspondence to D. Naumov.

Additional information

PACS

13.15.+g; 13.60.Le; 13.87.Fh; 14.40.Ev

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Samoylov, O., Naumov, D., Cavasinni, V. et al. Search for the exotic Θ+ resonance in the NOMAD experiment. Eur. Phys. J. C 49, 499–510 (2007). https://doi.org/10.1140/epjc/s10052-006-0080-y

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  • DOI: https://doi.org/10.1140/epjc/s10052-006-0080-y

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