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https://hdl.handle.net/10316/4562
Title: | First direct observation of time-reversal non-invariance in the neutral-kaon system | Authors: | Angelopoulos, A. Apostolakis, A. Aslanides, E. Backenstoss, G. Bargassa, P. Behnke, O. Benelli, A. Bertin, V. Blanc, F. Bloch, P. Carlson, P. Carroll, M. Cawley, E. Charalambous, S. Chertok, M. B. Danielsson, M. Dejardin, M. Derre, J. Ealet, A. Eleftheriadis, C. Faravel, L. Fetscher, W. Fidecaro, M. Filipcic, A. Francis, D. Fry, J. Gabathuler, E. Gamet, R. Gerber, H. -J. Go, A. Haselden, A. Hayman, P. J. Henry-Couannier, F. Hollander, R. W. Jon-And, K. Kettle, P. -R. Kokkas, P. Kreuger, R. Le Gac, R. Leimgruber, F. Mandic, I. Manthos, N. Marel, G. Mikuz, M. Miller, J. Montanet, F. Muller, A. Nakada, T. Pagels, B. Papadopoulos, I. Pavlopoulos, P. Policarpo, A. Polivka, G. Rickenbach, R. Roberts, B. L. Ruf, T. Santoni, C. Schäfer, M. Schaller, L. A. Schietinger, T. Schopper, A. Tauscher, L. Thibault, C. Touchard, F. Touramanis, C. Van Eijk, C. W. E. Vlachos, S. Weber, P. Wigger, O. Wolter, M. Zavrtanik, D. Zimmerman, D. |
Issue Date: | 1998 | Citation: | Physics Letters B. 444:1-2 (1998) 43-51 | Abstract: | We report on the first observation of time-reversal symmetry violation through a comparison of the probabilities of transforming into K0 and K0 into as a function of the neutral-kaon eigentime t. The comparison is based on the analysis of the neutral-kaon semileptonic decays recorded in the CPLEAR experiment. There, the strangeness of the neutral kaon at time t=0 was tagged by the kaon charge in the reaction at rest, whereas the strangeness of the kaon at the decay time t=[tau] was tagged by the lepton charge in the final state. An average decay-rate asymmetrywas measured over the interval 1 [tau]S<[tau]<20 [tau]S, thus leading to evidence for time-reversal non-invariance. | URI: | https://hdl.handle.net/10316/4562 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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