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Bose-Einstein correlations in\(\bar p\)p annihilations at rest

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Zeitschrift für Physik C Particles and Fields

Abstract

Two-charged-pion correlations were studied in\(\bar p\)p(→2π*2π− nπ0,n≥0) annihilations at rest with the CPLEAR detector at the Low-Energy Antiproton Ring (LEAR). A strong enhancement was found in the production of pairs of like-sign pions with a small value of the relative fourmomentumQ, with respect to pairs of unlike-sign pions. The observed enhancement was interpreted as a consequence of the Bose-Einstein symmetrization of the two-pion wave function. The data are well represented by a correlation function parametrized as a double-Gaussian; an exponential parametrization is also statistically acceptable. The value of the correlation strength is found to be >1. The high-quality large data samples together with the ability for K± identification and final-state separation allowed the study of systematic effects impacting on theQ dependence of the correlation function and on the extracted space parameters of the pion sources.

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Author information

Author notes

  1. V. Bertin & T. Geralis

    Present address: RAL, Ridcot, UK

  2. J. K. Bienlein

    Present address: DESY, Hamburg, Germany

  3. Ch. Bula

    Present address: Princeton University, Princeton, NJ, USA

  4. M. Dodgson

    Present address: CERN, Switzerland

  5. C. Fuglesang

    Present address: ESA/EAC, Köln, Germany

  6. P. Gumplinger

    Present address: TRIUMF, Vancouver, Canada

  7. P. F. Harrison

    Present address: QMW, University of London, UK

  8. W. G. Heyes

    Present address: CEBAF, Newport News, VA, USA

  9. H. U. Johner

    Present address: SUeR, Friboug University, Switzerland

  10. T. Lawry

    Present address: University of Virginia, Charlottesville, VA, USA

  11. F. Pelucchi

    Present address: INFN, Frascati, Italy

  12. L. Sacks

    Present address: UCL, University College, London, UK

  13. D. A. Troster

    Present address: SBS, Basle, Switzerland

  14. C. Witzig

    Present address: Brookhaven National Laboratory, Upton, NY, USA

Authors and Affiliations

  1. University of Athens, GR-10680, Athens, Greece

    A. Angelopoulos, A. Apostolakis, E. Rozaki, L. Sakeliou & K. Sarigiannis

  2. University of Basle, CH-4056, Basle, Switzerland

    R. Adler, G. Backenstoss, B. Eckart, C. Felder, B. Pagels, P. Pavlopoulos, G. Polivka, R. Rickenbach, C. Santoni, L. Tauscher & D. A. Troster

  3. Boston University, 02215, Boston, MA, USA

    M. B. Chertok, D. Francis, A. Go, T. Lawry, J. Miller, B. L. Roberts, G. Varner & D. Zimmerman

  4. CERN, CH-1211, Geneva 23, Switzerland

    E. Aslanides, C. P. Bee, P. Bloch, M. Dejardin, M. Fidecaro, W. G. Heyes, T. Ruf & A. Schopper

  5. LIP and University of Coimbra, P-3000, Coimbra, Portugal

    J. Carvalho, R. Ferreira-Marques, E. Machado, A. Onofre, J. Pinto da Cunha, A. Policarpo & E. Van Beveren

  6. Delft University of Technology, 2629 JB, Delft, Netherlands

    R. W. Hollander, R. Kreuger, H. Postma & C. W. E. Van Eijk

  7. University of Fribourg, CH-1700, Fribourg, Switzerland

    J. C. Dousse, L. Faravel, H. U. Johner, J. Kern & L. A. Schaller

  8. University of Ioannina, GR-45110, Ioannina, Greece

    I. Evangelou, P. Kokkas, N. Manthos & F. Triantis

  9. University of Liverpool, L69 3BX, Liverpool, UK

    J. Bennet, E. Cawley, A. Cody (Visotor), M. Dodgson, J. Fry, E. Gabathuler, R. Gamet, P. F. Harrison, A. Haselden, P. J. Hayman, P. Maley, L. Sacks, P. Sanders & S. Vlachos

  10. J. Stefan Inst. and Phys. Dep., University of Ljubljana, SI-61111, Ljubljana, Slovenia

    A. Filipčič, I. Mandić, M. Mikuž & D. Zavrtanik

  11. CPPM, IN2P3-CNRS et Université d'Aix-Marseille II, F-13288, Marseille, France

    T. Alhalel, E. Aslanides, V. Bertin, A. Ealet, P. Fassnacht, F. Henry-Couannier, R. Le Gac, F. Montanet, F. Pelucchi & F. Touchard

  12. CSNSM, IN2P3-CNRS, F-91405, Orsay, France

    C. Thibault

  13. Paul-Scherrer-Institut(PSI), CH-5232, Villigen, Switzerland

    Ch. Bula, T. Geralis, P. R. Kettle, T. Nakada & O. Wigger

  14. DAPNIA/SPP, CE Saclay, F-91191, Gif-sur-Yvette, France

    G. Chardin, J. Derre, J. Duclos, J. L. Faure, D. Garreta, C. Guyot, C. Kochowski, G. Marel, P. Schune, A. Soares, F. Touchard & C. Yeche

  15. Royal Institute of Technology, S-10405, Stockholm, Sweden

    P. Carlson, M. Danielsson, C. Fuglesang, K. Jansson, K. Jon-And & A. Kerek

  16. University of Thessaloniki, GR-54006, Thessaloniki, Greece

    S. Charalambous, M. Chardalas, S. Dedoussis, C. Eleftheriadis, A. Liolios & C. Touramanis

  17. ETH-ITP Zürich, CH-8093, Zürich, Switzerland

    O. Behnke, J. K. Bienlein, W. Fetscher, H. -J. Gerber, P. Gumplinger, M. Schäfer, P. Weber, C. Witzig & M. Wolter

Authors
  1. R. Adler
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  2. T. Alhalel
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  3. A. Angelopoulos
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  4. A. Apostolakis
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  5. E. Aslanides
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  6. G. Backenstoss
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  7. C. P. Bee
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  8. O. Behnke
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  9. J. Bennet
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  10. V. Bertin
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  11. J. K. Bienlein
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  12. P. Bloch
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  13. Ch. Bula
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  17. S. Charalambous
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  18. M. Chardalas
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CPLEAR Collaboration., Adler, R., Alhalel, T. et al. Bose-Einstein correlations in\(\bar p\)p annihilations at rest. Z. Phys. C - Particles and Fields 63, 541–547 (1994). https://doi.org/10.1007/BF01557618

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  • DOI: https://doi.org/10.1007/BF01557618

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