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Observation of double-Pomeron exchange in alpha-alpha collisions at the CERN intersecting storage rings

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Zeitschrift für Physik C Particles and Fields

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Abstract

We observed the process αα→ααX in which the α′s were emitted uncorrelated in the forward direction and the charged component of the clusterX was confined to a limited portion (|η|≲2) of the central region. We identified such reactions as being due to double-Pomeron exchange, for which we found a cross-section of (720±140)μb. The raw mean charged multiplicity of the clusterX was found to be 6.76±0.07 with a dispersionD=4.8. The measurements were performed at the CERN ISR at a centre-of-mass energy of\(\sqrt s = 126\) GeV. Similarities are drawn between double-Pomeron exchange in αα and inpp collisions.

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Author notes

  1. G. Anzivino

    Present address: CERN, CH-1211, Geneva, Switzerland

  2. D. Lloyd Owen

    Present address: State University of New York, 11790, Stony Brook, NY, USA

Authors and Affiliations

  1. Dipartimento di Fisica dell'Università and INFN, I-56100, Pisa, Italy

    V. Cavasinni, T. Del Prete, M. Morganti & F. Schiavo

  2. CERN, CH-1211, Geneva, Switzerland

    D. Lloyd Owen

  3. Dipartimento di Fisica dell'Università and INFN, I-80100, Naples, Italy

    G. Paternoster & S. Patricelli

  4. State University of New York, 11790, Stony Brook, NY, USA

    G. Anzivino

Authors
  1. V. Cavasinni
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  2. T. Del Prete
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  3. M. Morganti
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  4. F. Schiavo
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  5. D. Lloyd Owen
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  6. G. Paternoster
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  7. S. Patricelli
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  8. G. Anzivino
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Cavasinni, V., Del Prete, T., Morganti, M. et al. Observation of double-Pomeron exchange in alpha-alpha collisions at the CERN intersecting storage rings. Z. Phys. C - Particles and Fields 28, 487–493 (1985). https://doi.org/10.1007/BF01473994

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  • DOI: https://doi.org/10.1007/BF01473994

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