Measurement of CP,T and CPT violation parameters in the Neutral Kaon system at CPLEAR

✍ Scribed by Michael Carroll; R. Adler; T. Alhalel; A. Angelopoulos; A. Apostolakis; E. Aslanides; G. Backenstoss; P. Bargassa; C.P. Bee; O. Behnke; A. Benelli; V. Bertin; F. Blanc; P. Bloch; P. Carlson; M. Carroll; J. Carvalho; E. Cawley; S. Charalambous; G. Chardin; M.B. Chertok; A. Cody; M. Danielsson; M. Dejardin; J. Derre; A. Ealet; B. Eckart; C. Eleftheriadis; I. Evangelou; L. Faravel; P. Fassnacht; C. Felder; R. Ferreira-Marques; W. Fetscher; M. Fidecaro; A. Filipčič; D. Francis; J. Fry; E. Gabathuler; R. Gamet; D. Garreta; H.-J. Gerber; A. Go; C. Guyot; A. Haselden; P.J. Hayman; F. Henry-Couannier; R.W. Hollander; E. Hubert; K. Jon-And; P.-R. Kettle; C. Kochowski; P. Kokkas; R. Kreuger; R. Le Gac; F. Leimgruber; A. Liolios; E. Machado; I. Mandić; N. Manthos; G. Marel; M. Mikuz̃; J. Miller; F. Montanet; T. Nakada; B. Pagels; I. Papadopoulos; P. Paylopoulos; J. Pinto da Cunha; A. Policarpo; G. Polivka; R. Rickenbach; B.L. Roberts; T. Ruf; L. Sakeliou; P. Sanders; C. Santoni; M. Schäfer; L.A. Schaller; T. Schietinger; A. Schopper; P. Schune; A. Soares; L. Tauscher; C. Thibault; F. Touchard; C. Touramanis; F. Triantis; E. Van Beveren; C.W.E. Van Eijk; S. Vlachos; P. Weber; O. Wigger; M. Wolter; C. Yeche; D. Zavrtanik; D. Zimmerman

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 396 KB
• Volume: 626
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(97)00532-0

✦ Synopsis

The, CPLEA1R experiment at. CEIR, N measures the time dependent decay rate asymmetries of initially pure t( ° and ~o states to study CP,T and CPT symmetries in the neutral kaon system. The latest results on ~+ , Am and x are reported, as well as direct tests of T violation and CPT violation in K°-~ oscillations. Our results are consistent with CPT invariance and allow for an improved limit on the K°-K ° mass difference. Further, a possible loss of quantum coherence of the neutral kaon system has been tested to a level near the Planck scale.

!. INTRODUCTION

The CPLEAR experiment [l] investigates CP, T and CPT symmetries in the neutral kaon system. Unlike previous experiments which have used KL and Ks beams to investigate CP violation in various channels[2] (e.g.~r+rr -, rr+rr-rc°,~r%r °) CPLEAR uses initially pure K ° and ~o states. The rates of their decays to a number of final states are measured, allowing