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arXiv:hep-ex/9511001 · Physics Letters B

Tests of CPT symmetry and quantum mechanics with experimental data from CPLEAR

R. Adler, Angelos Angelopoulos, A. J. Apostolakis, E. Aslanides, Gerhard Backenstoss, C. P. Bee, O. Behnke, Angela Benelli, Vincent Bertin, F. Blanc, Philippe Bloch, P. Carlson, M. Carroll, J. Carvalho, E. Cawley, St. Charalambous, G. Chardin, M. Chertok, A. Cody, Mats E. Danielsson, M. Déjardin, J. Derré, A. Ealet, B. Eckart, Christos A. Eleftheriadis, I. Evangelou, L. Faravel, P. Fassnacht, C. Felder, R. Ferreira‐Marques, Wulf Fetscher, Maria Fidecaro, Andrej Filipcic, David J. Francis, J. R. Fry, Erwin Gabathuler, R. Gamet, D. Garreta, H.-J. Gerber, A. Go, Claude Guyot, A. Haselden, P.J. Hayman, Frederic Henry-Couannier, R.W. Hollander, E. Hubert, Kerstin B. Jon-And, P.R. Kettle, C. Kochowski, P. Kokkas, Rob Kreuger, R. Le Gac, F. Leimgruber, A. Liolios, E. Machado, I. Mandić, N. Manthos, G. Marel, M. Mikuž, J. Miller, F. Montanet, T. Nakada, B. Pagels, I. Papadopoulos, Panagiotis Pavlopoulos, J. Pinto da Cunha, A. J. P. L. Policarpo, G. Polivka, R. Rickenbach, B. L. Roberts, T. Ruf, L. Sakeliou, P. Sanders, Claudio Santoni, M. Schäfer, Lukas A. Schaller, Thomas Schietinger, A. Schopper, Ph. Schune, A. Soares, Ludwig Tauscher, C. Thibault, François Touchard, Christos Touramanis, Frixos A Triantis, Eef van Beveren, Carel W.E. van Eijk, Gary Sim Varner, S. Vlachos, P. Weber, O. Wigger, M. W. Wolter, Ch. Yèche, Danilo Zavrtanik, D. Zimmerman, J. Ellis, J.L. Lopez, Nick E. Mavromatos, D.V. Nanopoulos

Published Dec 1, 1995• 100 citations

Abstract

We use fits to recent published CPLEAR data on neutral kaon decays to π+π− and πeν to constrain the CPT-violation parameters appearing in a formulation of the neutral kaon system as an open quantum-mechanical system. The obtained upper limits of the CPT-violation parameters are approaching the range suggested by certain ideas concerning quantum gravity.

DOI: 10.1016/0370-2693(95)01416-0

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The neutral kaon system at a

\phi

-factory offers a unique possibility to perform fundamental tests of

CPT

invariance, as well as of the basic principles of quantum mechanics. The most recent and significant limits on

CPT

violation are reviewed, including the ones related to possible decoherence mechanisms or Lorentz symmetry breaking, which might be induced in a quantum gravity scenario. The present experimental results show no deviations from the expectations of quantum mechanics and

CPT

symmetry, while the accuracy in some cases reaches the interesting Planck scale region. The KLOE-2 experiment, presently taking data at the DA

\Phi

NE facility, will further improve these results.

The neutral kaon system offers a unique possibility to perform fundamental tests of CPT invariance, as well as of the basic principles of quantum mechanics. The most recent limits obtained by the KLOE experiment at the DAF NE e+e- collider on several kinds of possible CPT violation and decoherence mechanisms, which in some cases might be justified in a quantum gravity framework, are reviewed. No deviation from the expectations of quantum mechanics and CPT symmetry is observed, while the precision of the measurements, in some cases, reaches the interesting Planck scale region. Finally, prospects for this kind of experimental studies at KLOE-2 are presented. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.