Author: "Polivka, G." - Searchworks@Jio Institute Digital Library Search Results

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247 results on '"Polivka, G."'

1. Pion correlations and resonance effects in $$\bar pp$$ annihilation at rest to 2π+2π-π0

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Farave, L., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Gabathuler, E., Garnet, R., Gerber, H. -J., Go, A., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., JonAnd, 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., 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., Locher, M. P., Markushin, V. E., and CPLEAR Collaboration
Published: 1999
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2. Direct determination of two-pion correlations for pp→ 2π+2π− annihilation at rest

Author: Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Carvalho, J., Cawley, E., Charalambous, S., Chardin, G., Chertok, M. B., Cody, A., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Evangelou, I., Faravel, L., Ferreira-Marques, R., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Garreta, D., Gerber, H. -J., Go, A., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., Hubert, E., Jon-And, K., Kettle, P. -R., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Liolios, A., Locher, M. P., Machado, E., Mandić, I, Manthos, N., Marel, G., Markushin, V. E., Mikuž, M., Miller, J., Montanet, F., Muller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Pinto da Cunha, J., Policarpo, A., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Sanders, P., Schäfer, M., Schaller, L. A., Schietinger, T., Schopper, A., Soares, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Triantis, F., Van Beveren, E., Van Eijk, C. W. E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Yeche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration
Published: 1998
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3. Measurement ofCP violation parameters and test ofCPT invariance with $$\overline {K^0 } $$ and K0 at LEARand K0 at LEAR

Author: Adler, R., Alhalel, T., Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bee, C. P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Bula, Ch., Carlson, P., Carroll, M., Carvalho, J., Cawley, E., Charalambous, S., Chardalas, M., Chardin, G., Chertok, M. B., Cody, A., Danielsson, M., Dedoussis, S., Dejardin, M., Derre, J., Duclos, J., Ealet, A., Eckart, B., Eleftheriadis, C., Evangelou, I., Faravel, L., Fassnacht, P., Faure, J. L., Felder, C., Ferreira-Marques, R., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Garreta, D., Gerber, H. -J., Go, A., Guyot, C., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., Hubert, E., Jon-And, K., Kettle, P. -R., Kochowski, C., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Liolios, A., Machado, E., Mandić, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Nakada, T., Onofre, A., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Pinto da Cunha, J., Policarpo, A., Polivka, G., Rickenbach, R., Roberts, B. L., Rozaki, E., Ruf, T., Sakeliou, L., Sanders, P., Santoni, C., Sarigiannis, K., Schäfer, M., Schaller, L. A., Schopper, A., Schune, P., Soares, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Triantis, F., Van Beveren, E., Van Eijk, C. W. E., Varner, G., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Yèche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration
Published: 1996
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4. Inclusive measurement of $$\bar p$$ annihilation at rest in gaseous hydrogen to final states containingρ andf 2

Author: Adler, R., Alhalel, T., Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bee, C. P., Behnke, O., Bennet, J., Bertin, V., Bienlein, J. K., Bloch, P., Bula, Ch., Carlson, P., Carvalho, J., Cawley, E., Charalambous, S., Chardalas, M., Chardin, G., Chertok, M. B., Danielsson, M., Cody, A., Dedoussis, S., Dejardin, M., Derre, J., Dodgson, M., Dousse, J. C., Duclos, J., Ealet, A., Eckart, B., Eleftheriadis, C., Evangelou, I., Faravel, L., Fassnacht, P., Faure, J. L., Felder, C., Ferreira-Marques, R., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Fuglesang, C., Gabathuler, E., Gamet, R., Garreta, D., Geralis, T., Gerber, H. -J., Go, A., Gumplinger, P., Guyot, C., Harrisch, P. F., Haselden, A., Hayman, P. J., Henry-Couannier, F., Heyes, W. G., Hollander, R. W., Jansson, K., Johner, H. U., Jon-And, K., Kerek, A., Kern, J., Kettle, P. R., Kochowski, C., Kokkas, P., Kreuger, R., Lawry, T., Le Gac, R., Liolios, A., Machado, E., Maley, P., Mandić, I., Manthos, N., Marel, G., Mikuž, M., Miller, J., Montanet, F., Nakada, T., Onofre, A., Pagels, B., Pavlopoulos, P., Pelucchi, F., Pinto da Cunha, J., Policarpo, A., Polivka, G., Postma, H., Richkenbach, R., Roberts, B. L., Rozaki, E., Ruf, T., Sacks, L., Sakeliou, L., Sanders, P., Santoni, C., Sarigiannis, K., Schäfer, M., Schaller, L. A., Schopper, A., Schune, P., Soares, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Triantis, F., Tröster, D. A., Van Beveren, E., Van Eijk, C. W. E., Varner, G., Vlachos, S., Weber, P., Wigger, O., Witzig, C., Wolter, M., Yeche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration
Published: 1995
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5. Bose-Einstein correlations in $$\bar p$$ p annihilations at rest

Author: Adler, R., Alhalel, T., Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bee, C. P., Behnke, O., Bennet, J., Bertin, V., Bienlein, J. K., Bloch, P., Bula, Ch., Carlson, P., Carvalho, J., Cawley, E., Charalambous, S., Chardalas, M., Chardin, G., Chertok, M. B., Danielsson, M., Cody, A., Dedoussis, S., Dejardin, M., Derre, J., Dodgson, M., Dousse, J. C., Duclos, J., Ealet, A., Eckart, B., Eleftheriadis, C., Evangelou, I., Faravel, L., Fassnacht, P., Faure, J. L., Felder, C., Ferreira-Marques, R., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Fuglesang, C., Gabathuler, E., Gamet, R., Garreta, D., Geralis, T., Gerber, H. -J., Go, A., Gumplinger, P., Guyot, C., Harrison, P. F., Haselden, A., Hayman, P. J., Henry-Couannier, F., Heyes, W. G., Hollander, R. W., Jansson, K., Johner, H. U., Jon-And, K., Kerek, A., Kern, J., Kettle, P. R., Kochowski, C., Kokkas, P., Kreuger, R., Lawry, T., Le Gac, R., Liolios, A., Machado, E., Maley, P., Mandić, I., Manthos, N., Marel, G., Mikuž, M., Miller, J., Montanet, F., Nakada, T., Onofre, A., Pagels, B., Pavlopoulos, P., Pelucchi, F., Pinto da Cunha, J., Policarpo, A., Polivka, G., Postma, H., Rickenbach, R., Roberts, B. L., Rozaki, E., Ruf, T., Sacks, L., Sakeliou, L., Sanders, P., Santoni, C., Sarigiannis, K., Schäfer, M., Schaller, L. A., Schopper, A., Schune, P., Soares, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Triantis, F., Troster, D. A., Van Beveren, E., Van Eijk, C. W. E., Varner, G., Vlachos, S., Weber, P., Wigger, O., Witzig, C., Wolter, M., Yeche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration
Published: 1994
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6. Contribution of CPLEAR to the physics of the neutral-kaon system

Author: Pavlopoulos, P, Adler, R, Alhalel, T, Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bee, C P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Carvalho, J, Cawley, E, Charalambous, S, Chardin, G, Chertok, M B, Cody, A, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eckart, B, Eleftheriadis, C, Evangelou, I, Faravel, L, Fassnacht, P, Felder, C, Ferreira-Marques, R, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Garreta, D, Gerber, H J, Go, A, Guyot, C, Haselden, A, Hayman, P J, Henry-Coüannier, F, Hollander, R W, Hubert, E, Jon-And, K, Kettle, P R, Kochowski, Claude, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Liolios, A, Machado, E, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pinto da Cunha, J, Policarpo, Armando, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Sakelliou, L, Sanders, M P, Santoni, C, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Schune, P, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, Triantis, F A, Van Beveren, E, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Yéche, C, Zavrtanik, D, and Zimmerman, D
Subjects: s mass difference, k-0, Physics, cp-violation, Nuclear and High Energy Physics, Particle physics, CPT symmetry, Direct method, semileptonic decays, High Energy Physics::Phenomenology, violation parameter eta(+-), Nuclear physics, tagged (k)over-bar(0), CP violation, High Energy Physics::Experiment, Limit (mathematics), Particle Physics - Experiment
Abstract: We report the results of the CPLEAR experiment on CP-, T-, and CPT-symmetries in the neutral kaon system. CP-violation parameters are given for the K-0, (K) over bar(0) --> 2 pi, 3 pi decay channels. For the first time, T-violation is measured by a direct method using semileptonic decays. The CPT symmetry is tested through the parameters Im(delta) with a precision of 10(-5) and Re(delta) with a precision of a few 10(-4). With these two measurements, the difference in mass and width of K-0 and (K) over bar(0) are bound to within 10(-18) GeV. In the limit of CPT invariance in the neutral kaon decays, the K-0 and (K) over bar(0) masses are equal within 10(-19) GeV. Nuclear Physics A
Published: 1999
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7. The neutral kaon decays to $\pi^+ \pi^- \pi^0$ : a detailed analysis of the CPLEAR data

Author: Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eleftheriadis, C, Faravel, L, Fassnacht, P, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Gerber, H J, Go, A, Haselden, A, Hayman, P J, Henry-Coüannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Zavrtanik, D, and Zimmerman, D
Subjects: Physics, Particle physics, Chiral perturbation theory, Physics and Astronomy (miscellaneous), Branching fraction, High Energy Physics::Phenomenology, Dalitz plot, Lambda, Amplitude, Isospin, CP violation, High Energy Physics::Experiment, Engineering (miscellaneous), Particle Physics - Experiment, Energy (signal processing)
Abstract: A detailed analysis of neutral kaons decaying to $\pi^{+}\pi^{-}\pi^{0}$ is presented based on the complete data set containing half a million events. Time-dependent decay rate asymmetries are measured between initially tagged ${\mathrm{{K}\mbox{}^0}}$ and ${\mathrm{\overline{K}\mbox{}^0}}$ and for different regions of the phase space. These asymmetries, resulting from the interference between the CP-conserving decay amplitude of ${\mathrm{K_L}}$ and the decay amplitude of ${\mathrm{K_S}}$– either CP-violating or CP-conserving – allow the determination of the ${\mathrm{K_S}}$ parameters $\eta_{+-0}$ (CP-violating) and $\lambda$ (CP-conserving), and also of the main isospin components of the ${\mathrm{K_S}}$ decay amplitude. The branching ratio of ${\mathrm{K_S}}\rightarrow \pi^{+}\pi^{-}\pi^{0}$ (CP-conserving) is deduced directly from $\lambda$. In addition, we extract the slope parameters describing the energy dependence of the ${\mathrm{K_L}} \rightarrow \pi^{+}\pi^{-}\pi^{0}$ Dalitz plot. The whole set of our results fits well within the current phenomenological picture of the neutral-kaon system including CP violation and Chiral Perturbation Theory (ChPT).
Published: 1998
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8. Physics at CPLEAR

Author: Angelopoulos, A. Apostolakis, A. Aslanides, E. Backenstoss, G. Bargassa, P. Bee, C.P. Behnke, O. Benelli, A. Bertin, V. Blanc, F. Bloch, P. Carlson, P. Carroll, M. Cawley, E. Chertok, M.B. Danielsson, M. Dejardin, M. Derre, J. Ealet, A. Eleftheriadis, C. Ferreira-Marques, R. Fetscher, W. Fidecaro, M. Filipčič, 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. Mandić, I. Manthos, N. Marel, G. Mikuž, M. Miller, J. Montanet, F. Muller, A. Nakada, T. Pagels, B. Papadopoulos, I. Pavlopoulos, P. Policarpio, A. Polivka, G. Rickenbach, R. Roberts, B.L. Ruf, T. Sakeliou, L. 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. Yèche, C. Zavrtanik, D. Zimmerman, D.
Abstract: LEAR offered unique opportunities to study the symmetries which exist between matter and antimatter. At variance with other approaches at this facility, CPLEAR was an experiment devoted to the study of CP, T and CPT symmetries in the neutral-kaon system. A variety of measurements allowed us to determine with high precision the parameters which describe the time evolution of the neutral kaons and their antiparticles, including decay amplitudes, and the related symmetry properties. Limits concerning quantum-mechanical predictions (EPR, coherence of the wave function) or the equivalence principle of general relativity have been obtained. An account of the main features of the experiment and its performances is given here, together with the results achieved. © 2002 Elsevier Science B.V. All rights reserved.
Published: 2003

9. $T$-violation and $CPT$-invariance measurements in the CPLEAR experiment: a detailed description of the analysis of neutral-kaon decays to $e\pi\nu$

Author: Angelopoulos, Angelos, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eleftheriadis, C, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Gerber, H J, Go, A, Haselden, A, Hayman, P J, Henry-Coüannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Müller, A, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Sakelliou, L, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Zavrtanik, D, and Zimmerman, D
Subjects: High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: A detailed description of the analysis of neutral kaons decaying to \pen\ is given, based on the complete set of data collected with the CPLEAR experiment. Using a novel approach involving initially strangeness-tagged \kn\ and \knb , time-dependent decay-rate asymmetries were measured. These asymmetries enabled \Tz - and \CPTz -violation parameters to be measured in the context of a systematic study. The highlights of this study are the first direct observation of \Tz\ violation and the direct determination of the \CPTz\ parameter \red\ with an accuracy improved by two orders of magnitude with respect to the current value.
Published: 2001

10. $K^{0} \leftrightarrow \overline{K}^{0}$ transitions monitored by strong interactions : a new determination of the $K_{L}-K_{S}$ mass difference

Author: Angelopoulos, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B L., Ruf, T., Sakelliou, L., Schafer, 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., Lorgeril, Jocelyne, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CPLEAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 2001

11. T-violation and CPT-invariance measurements in the CPLEAR experiment: a detailed description of the analysis of neutral-kaon decays to e pi nu

Author: Angelopoulos, A Aslanides, E Backenstoss, G Bargassa, P and Behnke, O Benelli, A Bertin, V Blanc, F Bloch, P and Carlson, P Carroll, M Cawley, E Chertok, MB Danielsson, M Dejardin, M Derre, J Ealet, A Eleftheriadis, C and Fetscher, W Fidecaro, M Filipcic, A Francis, D Fry, J and Gabathuler, E Gamet, R Gerber, HJ Go, A Haselden, A and Hayman, PJ Henry-Couannier, F Hollander, RW Jon-And, K and Kettle, PR Kokkas, P Kreuger, R Le Gac, R and Leimgruber, F Mandic, I Manthos, N Marel, G Mikuz, M and Miller, J Montanet, F Muller, A Nakada, T Pagels, B and Papadopoulos, I Pavlopoulos, P Polivka, G Rickenbach, R and Roberts, BL Ruf, T Sakeliou, L Schafer, M Schaller, LA and Schietinger, T Schopper, A Tauscher, L Thibault, C and Touchard, F Touramanis, C Van Eijk, CWE Vlachos, S and Weber, P Wigger, O Wolter, M Zavrtanik, D Zimmerman, D and CPLEAR Collaboration
Subjects: High Energy Physics::Experiment
Abstract: A detailed description of the analysis of neutral kaons decaying to e pi nu is given, based on the complete set of data collected with the CPLEAR experiment, Using a novel approach involving initially strangeness-tagged K-0 and (K) over bar (0), time-dependent decay-rate asymmetries were measured, These asymmetries enabled T- and CPT-violation parameters to be measured in the context of a systematic study. The highlights of this study arc the first direct observation of T violation and the direct determination of the CPT parameter Re(delta) with an accuracy improved by two orders of magnitude with respect to the current value.
Published: 2001

12. $K^{0} \leftrightharpoons \overline{K}^0$ transitions monitored by strong interactions: a new determination of the $K_{L} - K_{S}$ mass difference

Author: Angelopoulos, Angelos, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eleftheriadis, C, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Gerber, H J, Go, A, Haselden, A, Haymen, P J, Henry-Coüannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Müller, A, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Sakelliou, L, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Zavrtanik, D, and Zimmerman, D
Subjects: High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract: The CPLEAR set-up (modified) has been used to determine the K/sub L/- K/sub S/ mass difference by a method where neutral-kaon strangeness oscillations are monitored through kaon strong interactions, rather than semileptonic decays, thus requiring no assumptions on CPT invariance for the decay amplitudes. The result, Delta m= (0.5343+or-0.0063/sub stat/+or-0.0025/sub syst/)*10/sup 10/ h(cross) /s, provides a valuable input for CPT tests. (22 refs).
Published: 2001

13. K0 ⇋ K̄0 transitions monitored by strong interactions: A new determination of the KL-KS mass difference

Author: Angelopoulos, A. Aslanides, E. Backenstoss, G. Bargassa, P. Behnke, O. Benelli, A. Bertin, V. Blanc, F. Bloch, P. Carlson, P. Carroll, M. Cawley, E. Chertok, M.B. Danielsson, M. Dejardin, M. Derre, J. Ealet, A. Eleftheriadis, C. Fetscher, W. Fidecaro, M. Filipčič, 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. Mandi, I. Manthos, N. Marel, G. Mikuž, M. Miller, J. Montanet, F. Muller, A. Nakada, T. Pagels, B. Papadopoulos, I. Pavlopoulos, P. Polivka, G. Rickenbach, R. Roberts, B.L. Ruf, T. Sakeliou, L. 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.
Abstract: The CPLEAR set-up (modified) has been used to determine the KL-KS mass difference by a method where neutral-kaon strangeness oscillations are monitored through kaon strong interactions, rather than semileptonic decays, thus requiring no assumptions on CPT invariance for the decay amplitudes. The result, Δm = (0.5343 ± 0.0063stat ± 0.0025syst) × 1010h/s, provides a valuable input for CPT tests. © 2001 Published by Elsevier Science B.V.
Published: 2001

14. CP, T and CPT at CPLEAR

Author: Filipcic, Andrej, 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, Chertok, M B, Danielsson, M, Dejardin, M, Derre, J, Ealet, A, Eleftheriadis, C, 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, Marsel, G, Mikuz, M, Miller, J, Montanet, F, Muller, A, Nakada, T, Pagels, B, Papadopoulos, I, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Schafer, 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, and Zimmerman, D
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: Using strangeness tagging at production time, CPLEAR measures time-dependent decay rate asymmetries between $K^0$ and $\bar{K}^0$, for picnic and semileptonic decays. Parameters describing CP, T, and CPT violation can be obtained with high precision. In the semileptonic channels neutral kaons are strangeness tagged also at the decay time, by the lepton charge, thus allowing the difference between the transition rates of $\bar{K}^0 \to K^0$ and $K^0 \to \bar{K}^0$ to be measured. In this way CPLEAR obtains the first direct measurement of T violation. By fitting the semileptonic rates under the constraint of the unitarity relation, we prove that in the reported measurement T violation is not mocked by CPT-violation effects in the decay amplitudes. Other CPLEAR measurements, only in part reported here, contribute to the experimental accuracy of the unitarity relation.
Published: 2001

15. T-violation and CPT-invariance measurements in the CPLEAR experiment: a detailed description of the analysis of neutral-kaon decays to e pi nu

Author: Angelopoulos, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Schafer, 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., and CPLEAR Collaboration
Subjects: s mass difference, semileptonic decays, tests, particle physics, system, parameter eta(+-)
Abstract: A detailed description of the analysis of neutral kaons decaying to e pi nu is given, based on the complete set of data collected with the CPLEAR experiment, Using a novel approach involving initially strangeness-tagged K-0 and (K) over bar (0), time-dependent decay-rate asymmetries were measured, These asymmetries enabled T- and CPT-violation parameters to be measured in the context of a systematic study. The highlights of this study arc the first direct observation of T violation and the direct determination of the CPT parameter Re(delta) with an accuracy improved by two orders of magnitude with respect to the current value. European Physical Journal C
Published: 2001

16. K-0 reversible arrow (K)over-bar(0) transitions monitored by strong interactions: a new determination of the K-L-K-S mass difference

Author: Angelopoulos, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Schafer, 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., and CPLEAR Collaboration
Abstract: The CPLEAR set-up (modified) has been used to determine the K-L-K-S mass difference by a method where neutral-kaon strangeness oscillations are monitored through kaon strong interactions, rather than semileptonic decays, thus requiring no assumptions on CPT invariance for the decay amplitudes. The result, Deltam = (0.5343 +/- 0.0063(stat) +/- 0.0025(syst)) x 10(10)h/s, provides a valuable input for CPT tests. (C) 2001 Published by Elsevier Science B.V. Physics Letters B
Published: 2001

17. A review of the latest CPLEAR results on T violation and CPT invariance in the neutral-kaon system

Author: 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., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Schafer, 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., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CPLEAR, Lorgeril, Jocelyne, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 2000

18. Experimental tests of CPT invariance

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Schafer, 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., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), J.F. Nieves, CPLEAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 2000

19. Time violation and CPT tests at CPLEAR

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Schafer, 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., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Guo H.X., Thomas A.W., Williams A.G., CPLEAR, Lorgeril, Jocelyne, Guo H.X., Thomas A.W., Williams A.G., and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 2000

20. Measurement of the energy dependence of the form factor f(+) in K-e3(0) decay

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Schafer, 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., and CPLEAR Collaboration
Abstract: Neutral-kaon decays to pi e nu were analysed to determine the q(2) dependence of the K-e3(0), electroweak form factor f(+). Based on 365612 events, this form factor was found to have a linear dependence on q(2) with a slope lambda(+) = 0.0245 +/- 0.0012(stat) +/- 0.0022(syst). (C) 2000 Published by Elsevier Science B.V. All rights reserved. Physics Letters B
Published: 2000

21. A detailed description of the analysis of the decay of neutral kaons to $\pi^+ \pi^-$ in the CPLEAR experiment

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B L., Ruf, T., Sakelliou, L., Schafer, 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., Yeche, C., Zavrtanik, D., Zimmerman, D., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CPLEAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, media_common.quotation_subject, 01 natural sciences, Asymmetry, Amplitude, 0103 physical sciences, Pi, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], CP violation, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment, media_common
Abstract: A detailed description is given of the analysis of neutral kaons decaying to ${\mathrm{\pi^+\pi^-}}$, based on the complete set of data collected with the CPLEAR experiment. Using a novel approach involving initially strangeness-tagged ${\mathrm{K^0}}$ and ${\mathrm{\overline{K}^0}}$, the time-dependent decay-rate asymmetry has been measured. This asymmetry, resulting from the interference between the ${\mathrm{K_S}}$ and ${\mathrm{K_L}}$ decay amplitudes, has enabled both the magnitude and phase of the CP-violation parameter, $\eta_{+-}$, to be measured, with a precision comparable to that of the current world-average values.
Published: 2000

22. Measurement of the energy dependence of the form factor f(+) in K-e3(0) decay

Author: Apostolakis, A Aslanides, E Backenstoss, G Bargassa, P and Behnke, O Benelli, A Bertin, V Blanc, F Bloch, P and Carlson, P Carroll, M Cawley, E Chertok, MB Danielsson, M Dejardin, M Derre, J Ealet, A Eleftheriadis, C and Fetscher, W Fidecaro, M Filipcic, A Francis, D Fry, J and Gabathuler, E Gamet, R Gerber, HJ Go, A Haselden, A and Hayman, PJ Henry-Couannier, F Hollander, RW Jon-And, K and Kettle, PR Kokkas, P Kreuger, R Le Gac, R and Leimgruber, F Mandic, I Manthos, N Marel, G Mikuz, M and Miller, J Montanet, F Muller, A Nakada, T Pagels, B and Papadopoulos, I Pavlopoulos, P Polivka, G Rickenbach, R and Roberts, BL Ruf, T Schafer, M Schaller, LA Schietinger, T Schopper, A Tauscher, L Thibault, C Touchard, F and Touramanis, C Van Eijk, CWE Vlachos, S Weber, P Wigger, O Wolter, M Zavrtanik, D Zimmerman, D CPLEAR Collaboration
Abstract: Neutral-kaon decays to pi e nu were analysed to determine the q(2) dependence of the K-e3(0), electroweak form factor f(+). Based on 365612 events, this form factor was found to have a linear dependence on q(2) with a slope lambda(+) = 0.0245 +/- 0.0012(stat) +/- 0.0022(syst). (C) 2000 Published by Elsevier Science B.V. All rights reserved.
Published: 2000

23. A detailed description of the analysis of the decay of neutral kaons to pi(+)pi(-) in the CPLEAR experiment

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Schafer, 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., Yeche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration
Subjects: s mass difference, semileptonic decays, tests, system, violation parameter eta(+-)
Abstract: A detailed description is given of the analysis of neutral kaons decaying to pi (+)pi (-), based on the complete set of data collected with the CPLEAR experiment. Using a novel approach involving initially strangeness-tagged K-0 and (K) over bar (0), the time-dependent decay-rate asymmetry has been measured. This asymmetry, resulting from the interference between the K-S and K-L decay amplitudes, has enabled both the magnitude and phase of the CP-violation parameter, eta (+-), to be measured, with a precision comparable to that of the current world-average values. European Physical Journal C
Published: 2000

24. A detailed description of the analysis of the decay of neutral kaons to π+π- in the CPLEAR experiment

Author: Apostolakis, A. Aslanides, E. Backenstoss, G. Bargassa, P. Behnke, O. Benelli, A. Bertin, V. Blanc, F. Bloch, P. Carlson, P. Carroll, M. Cawley, E. Chertok, M.B. Danielsson, M. Dejardin, M. Derre, J. Ealet, A. Eleftheriadis, C. Fetscher, W. Fidecaro, M. Filipčič, 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. Mandić, I. Manthos, N. Marel, G. Mikuž, M. Miller, J. Montanet, F. Muller, A. Nakada, T. Pagels, B. Papadopoulos, I. Pavlopoulos, P. Polivka, G. Rickenbach, R. Roberts, B.L. Ruf, T. Sakeliou, L. 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. Yeche, C. Zavrtanik, D. Zimmerman, D.
Subjects: High Energy Physics::Experiment
Abstract: A detailed description is given of the analysis of neutral kaons decaying to π+π-, based on the complete set of data collected with the CPLEAR experiment. Using a novel approach involving initially strangeness-tagged K0 and K̄0, the time-dependent decay-rate asymmetry has been measured. This asymmetry, resulting from the interference between the KS and KL decay amplitudes, has enabled both the magnitude and phase of the CP-violation parameter, η+-, to be measured, with a precision comparable to that of the current world-average values.
Published: 2000

25. $K^{0}-\overline{K}^{0}$ mass and decay-width differences: CPLEAR evaluation

Author: Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eleftheriadis, C, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Gerber, H J, Go, A, Haselden, A, Hayman, P J, Henry-Coüannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Müller, A, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Zavrtanik, D, and Zimmerman, D
Subjects: High Energy Physics::Experiment, Particle Physics - Experiment
Abstract: The CPT-violation parameters \redd\ and \imd\ determined recently by CPLEAR are used to evaluate the \kn --\knb\ mass and decay-width differences, as given by the difference between the diagonal elements of the neutral-kaon mixing matrix $({\mathrm M}-\i\Gamma/2)$. The results --- $({\mathrm M}_{\kn\kn}-{\mathrm M}_{\knb\knb}) = ( -1.5 \pm 2.0 )\times10^{-18}$ \gev\ and $(\Gamma_{\kn\kn}-\Gamma_{\knb\knb}) = ( 3.9 \pm 4.2 )\times 10^{-18}$ \gev\ --- are consistent with CPT invariance. The CPT invariance is also shown to hold within a few times $10^{-3}-10^{-4}$ for many of the amplitudes describing neutral-kaon decays to different final states.
Published: 1999

26. T and CPT violation in the neutral-kaon system

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Schafer, 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., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CPLEAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1999

27. CPLEAR results on CP, T and CPT violation parameters

Author: Mikuz, M., Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P.J., Carroll, M., Cawley, E., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Fetscher, W., Fidecaro, M., Filipcic, A., Francis, D., Fry, J.R., 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., Marotte, P., Miller, J., Montanet, F., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I.M., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Sakelliou, L., Schafer, M., 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., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), G.V. Fedotovich, S.I. Redin, and CPLEAR
Subjects: [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published: 1999

28. Results from CPLEAR on tests of CP, T and CPT using $K^0$ and $\bar K^0$

Author: 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., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C.A., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Schafer, 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., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), C.A. Dominguez, R.D. Viollier, CPLEAR, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Lorgeril, Jocelyne
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1999

29. Dispersion relation analysis of the neutral kaon regeneration amplitude in carbon

Author: Angelopoulos, A Apostolakis, A Aslanides, E Backenstoss, G and Bargassa, P Behnke, O Benelli, A Bertin, V Blanc, F and Bloch, P Carlson, P Carroll, M Cawley, E Chertok, MB and Danielsson, M Dejardin, M Derre, J Ealet, A and Eleftheriadis, C Faravel, L Fetscher, W Fidecaro, M and Filipcic, A Francis, D Fry, J Gabathuler, E Gamet, R and Gerber, HJ Go, A Haselden, A Hayman, PJ Henry-Couannier, F Hollander, RW Jon-And, K Kettle, PR Kokkas, P and Kreuger, R Le Gac, R Leimgruber, F Mandic, I Manthos, N and Marel, G Mikuz, M Miller, J Montanet, F Muller, A and Nakada, T Pagels, B Papadopoulos, I Pavlopoulos, P and Polivka, G Rickenbach, R Roberts, BL Ruf, T Schafer, M and Schaller, LA Schietinger, T Schopper, A Tauscher, L and Thibault, C Touchard, F Touramanis, C Van Eijk, CWE and Vlachos, S Weber, P Wigger, O Wolter, M Zavrtanik, D and Zimmerman, D Locher, MP Markushin, VE CPLEAR Collaboration
Abstract: We apply a forward dispersion relation to the regeneration amplitude for kaon scattering on C-12 using all available data. The CPLEAR data at low energies allow the determination of the net contribution from the subthreshold region which turns out to be much smaller than earlier evaluations, solving a long standing puzzle.
Published: 1999

30. Contribution of CPLEAR to the physics of the neutral-kaon system

Author: Weber, P Angelopoulos, A Apostolakis, A Aslanides, E and Backenstoss, G Bargassa, P Behnke, O Benelli, A Bertin, V Blanc, F Bloch, P Carlson, P Carroll, M Cawley, E and Chertok, MB Danielsson, M Dejardin, M Derre, J and Ealet, A Eleftheriadis, CA Faravel, L Fetscher, W and Fidecaro, M Filipcic, A Francis, D Fry, J Gabathuler, E and Gamet, R Gerber, HJ Go, A Haselden, A Hayman, PJ and Henry-Couannier, F Hollander, RW Jon-And, K Kettle, PR and Kokkas, P Kreuger, R Le Gac, R Leimgruber, F Mandic, I and Manthos, N Marel, G Mikuz, M Miller, J Montanet, F and Muller, A Nakada, T Pagels, B Papadopoulos, I and Pavlopoulos, P Polivka, G Rickenbach, R Roberts, BL Ruf, T Schafer, M Schaller, LA Schietinger, T Schopper, A and Tauscher, L Thibault, C Touchard, F Touramanis, C Van Eijk, CWE Vlachos, S Weber, P Wigger, O Wolter, M and Zavrtanik, D Zimmerman, D CPLEAR Collaboration
Subjects: High Energy Physics::Phenomenology, High Energy Physics::Experiment
Abstract: We report the results of the CPLEAR experiment on CP-, T-, and CPT-symmetries in the neutral kaon system. CP-violation parameters are given for the K-0, (K) over bar(0) –> 2 pi, 3 pi decay channels. For the first time, T-violation is measured by a direct method using semileptonic decays. The CPT symmetry is tested through the parameters Im(delta) with a precision of 10(-5) and Re(delta) with a precision of a few 10(-4). With these two measurements, the difference in mass and width of K-0 and (K) over bar(0) are bound to within 10(-18) GeV. In the limit of CPT invariance in the neutral kaon decays, the K-0 and (K) over bar(0) masses are equal within 10(-19) GeV.
Published: 1999

31. Tests of the Equivalence Principle with neutral kaons

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chardin, G., 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Schafer, 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., Ellis, J., Mavromatos, N. E., Nanopoules, D. V., and CPLEAR Collaboration
Subjects: antigravity, cplear, special relativity, quantum-mechanics, antiproton, system, cp violation, k-physics, symmetry, gravity
Abstract: We test the Principle of Equivalence for particles and antiparticles, using CPLEAR data on tagged K-0 and (K) over bar(0) decays into pi(+) pi(-). For the first time, we search for possible annual, monthly and diurnal modulations of the observables \eta(+-)\ and phi(+-), that could be correlated with variations in astrophysical potentials. Within the accuracy of CPLEAR, the measured values of \eta(+-)\ and phi(+-) are found not to be correlated with changes of the gravitational potential. We analyze data assuming effective scalar, vector and tensor interactions, and we conclude that the Principle of Equivalence between particles and antiparticles holds to a level of 6.5, 4.3 and 1.8 X 10(-9), respectively, for scalar, vector and tensor potentials originating from the Sun with a range much greater than the distance Earth-Sun. We also study energy-dependent effects that might arise from vector or tensor interactions. Finally, we compile upper limits on the gravitational coupling difference between K-0 and (K) over bar(0) as a function of the scalar, vector and tensor interaction range. (C) 1999 Elsevier Science B.V. All rights reserved. Physics Letters B
Published: 1999

32. Dispersion relation analysis of the neutral kaon regeneration amplitude in carbon

Author: 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., 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Schafer, 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., Locher, M. P., Markushin, V. E., and Cplear Collaboration
Abstract: We apply a forward dispersion relation to the regeneration amplitude for kaon scattering on C-12 using all available data. The CPLEAR data at low energies allow the determination of the net contribution from the subthreshold region which turns out to be much smaller than earlier evaluations, solving a long standing puzzle. European Physical Journal C
Published: 1999

33. Pion correlations and resonance effects in (p)over-bar-p annihilation at rest to 2 pi(+)2 pi(-)pi(0)

Author: Apostolakis, A Aslanides, E Backenstoss, G Bargassa, P and Behnke, O Benelli, A Bertin, V Blanc, F Bloch, P and Carlson, P Carroll, M Cawley, E Chertok, MB Danielsson, M Dejardin, M Derre, J Ealet, A Eleftheriadis, C and Faravel, L Fetscher, W Fidecaro, M Filipcic, A Francis, D Fry, J Gabathuler, E Gamet, R Gerber, HJ Go, A and Haselden, A Hayman, PJ Henry-Couannier, F Hollander, RW and Jonand, K Kettle, PR Kokkas, P Kreuger, R Le Gac, R and Leimgruber, F Mandic, I Manthos, N Marel, G Mikuz, M and Miller, J Montanet, F Muller, A Nakada, T Pagels, B and Papadopoulos, I Pavlopoulos, P Polivka, G Rickenbach, R and Roberts, BL Ruf, T Sakeliou, L Schafer, M Schaller, LA and Schietinger, T Schopper, A Tauscher, L Thibault, C and Touchard, F Touramanis, C Van Eijk, CWE Vlachos, S and Weber, P Wigger, O Wolter, M Zavrtanik, D Zimmerman, D and Locher, MP Markushin, VE
Abstract: We study pi pi correlations in the exclusive reaction (p) over bar p –> 2 pi(+)2 pi(-)pi(0) at rest with complete reconstruction of the kinematics for each event. Inclusive and differential distributions properly normalized show an enhancement for small invariant masses M++,M– of like-pion pairs. An even stronger enhancement is seen for the double differential distributions for low pion-pair masses. The signal is strongest when the pi(0) energy is large and much weaker when this energy is small. Dynamical models with resonances in the final state are confronted with the data. For the kinematic situation where the rho 3 pi channel is important the simulation predicts a large pion correlation for the double differential density, qualitatively explaining the observed bahaviour. The stochastic HBT mechanism is not supported by these findings for the exclusive annihilation reaction studied.
Published: 1999

34. A determination of the CP violation parameter eta(+-) from the decay of strangeness-tagged neutral kaons

Author: Apostolakis, A Aslanides, E Backenstoss, G Bargassa, P and Behnke, O Benelli, A Bertin, V Blanc, F Bloch, P and Carlson, P Carroll, M Cawley, E Chertok, MB Danielsson, M Dejardin, M Derre, J Ealet, A Eleftheriadis, C and Fetscher, W Fidecaro, M Filipcic, A Francis, D and Gabathuler, E Gamet, R Gerber, HJ Go, A Haselden, A and Hayman, PJ Henry-Couannier, F Hollander, RW Jon-And, K and Kettle, PR Kokkas, P Kreuger, R Le Gac, R Leimgruber, F and Mandic, I Manthos, N Marel, G Mikuz, M Miller, J and Montanet, F Muller, A Nakada, T Pagels, B Papadopoulos, I Pavlopoulos, P Polivka, G Rickenbach, R Roberts, BL and Ruf, T Sakeliou, L Schafer, M Schaller, LA and Schietinger, T Schopper, A Tauscher, L Thibault, C and Touchard, F Touramanis, C Van Eijk, CWE Vlachos, S and Weber, P Wigger, O Wolter, M Yeche, C Zavrtanik, D and Zimmerman, D CPLEAR Collaboration
Abstract: {We report a measurement of the CP violation parameter eta(+-) from the time-dependent asymmetry between the decay rates of initially tagged K-0 and (K) over bar(0). The results are based on the complete data sample collected by the CPLEAR collaboration. With Delta m = (530.1 +/- 1.4) X 10(7)(h) over bar s(-1) and tau(S) = (89.34 +/- 0.08) ps, the values obtained are \textbackslash{}eta(+-)\textbackslash{} = (2.264 +/- 0.023(stat) +/- 0.026(syst) +/- 0.007 tau(s)) x 10(-3) and phi(+-) = 43.19 degrees +/- 0.53(stat)degrees +/- 0.28(syst)degrees + 0.42(Delta m)degrees. (C) 1999 Published by Elsevier Science B.V. All rights reserved.}
Published: 1999

35. K$^0$-$\bar K^0$ mass and decay-width differences: CPLEAR evaluation

Author: 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., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C.A., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Schafer, 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., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CPLEAR, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1999

36. Determination of the T- and CPT-violation parameters in the neutral-kaon system using the Bell-Steinberger relation and data from CPLEAR

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Polivka, G., Rickenbach, R., Roberts, B. L., Sakeliou, L., Ruf, T., Schafer, 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., and CPLEAR Collaboration
Subjects: search, decay
Abstract: Data from the CPLEAR experiment, together with the most recent world averages for some of the neutral-kaon parameters, were constrained with the Bell-Steinberger (or unitarity) relation, allowing the T-violation parameter Re(epsilon) and the CPT-violation parameter Im(delta) of the neutral-kaon mixing matrix to be determined with an increased accuracy: Re(epsilon)=(164.9 +/- 2.5) x 10(-5), Im(delta)=(2.4 +/- 5.0) x 10(-5). Moreover, the constraint allows the CM-violation parameter for the neutral-kaon semileptonic decays, Re(), to be determined for the first time. The Delta S not equal Delta Q parameters Re(x_) and Im(x(+)) are given with an increased accuracy. The quantity Re(y + x_), which enters the T-violation CPLEAR asymmetry previously published, is determined to be (- 0.2 +/- 0.3) x 10(-3). The value obtained for Re(delta) is in agreement with the one resulting from a previous unconstrained fit and has a slightly smaller error. (C) 1999 Elsevier Science B.V, All rights reserved. Physics Letters B
Published: 1999

37. Pion correlations and resonance effects in (p)over-bar-p annihilation at rest to 2 pi(+)2 pi(-)pi(0)

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., 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., Jonand, 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Schafer, 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., Locher, M. P., and Markushin, V. E.
Subjects: intersecting storage-rings, cern, tev, dependence, ppbar interactions, final-states, collisions, interferometry, pp, bose-einstein correlations
Abstract: We study pi pi correlations in the exclusive reaction (p) over bar p --> 2 pi(+)2 pi(-)pi(0) at rest with complete reconstruction of the kinematics for each event. Inclusive and differential distributions properly normalized show an enhancement for small invariant masses M++,M-- of like-pion pairs. An even stronger enhancement is seen for the double differential distributions for low pion-pair masses. The signal is strongest when the pi(0) energy is large and much weaker when this energy is small. Dynamical models with resonances in the final state are confronted with the data. For the kinematic situation where the rho 3 pi channel is important the simulation predicts a large pion correlation for the double differential density, qualitatively explaining the observed bahaviour. The stochastic HBT mechanism is not supported by these findings for the exclusive annihilation reaction studied. European Physical Journal C
Published: 1999

38. A determination of the CP violation parameter $\eta_{\pm}$ from the decay of strangeness-tagged neutral kaons

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Sakeliou, L., Schafer, 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., Yeche, C., Zavrtanik, D., Zimmerman, D., Lorgeril, Jocelyne, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CPLEAR, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1999

39. Pion correlations and resonance effects in $\bar pp$ annihilation at rest to $2\pi^+ 2\pi^- \pi^0$

Author: Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Sakeliou, L., Schafer, 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., Locher, M.P., Markushin, V.E., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CPLEAR, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1999

40. Pion correlations and resonance effects in $\bar pp$ annihilation at rest

Author: 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., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C.A., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Schafer, 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., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CPLEAR, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Lorgeril, Jocelyne
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1998

41. Contribution of CPLEAR to the physics of the neutral-kaon system

Author: 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., Chertok, M. B., Mats Danielsson, Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C. A., Faravel, L., Fetscher, W., Fidecaro, M., Filipčič, 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., Mandić, I., Manthos, N., Marel, G., Mikuž, M., Miller, J., Montanet, F., Muller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Schäfer, M., Schaller, L. A., Schietinger, T., Schopper, A., Schune, P., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Eijk, C. W. E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Zavrtanik, D., Zimmerman, D., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CPLEAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1998

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

Author: Miller, J.P., Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Carvalho, J., Cawley, E., Chertok, M.B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftherjadis, 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B.L., Ruf, T., Schafer, M., Schaller, L., 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., Ellis, J., Lopez, J.L., Mavroumatis, N.E., Nanopoulos, D.V., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CPLEAR, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1998

43. Study of CP, T and CPT symmetries in the neutral kaon system at LEAR

Author: Le Gac, R., Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M B., Danielsson, M., Dejardin, M., Derre, J., Duclos, J., Ealet, A., Eleftheriadis, C., Faravel, L., Fassnacht, P., 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., Hubert, E., Jon-And, K., Kettle, P R., Kokkas, P., Kreuger, R., Leimgruber, F., Mandic, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B L., Ruf, T., Schafer, 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., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CPLEAR, and Damoiseaux, Magali
Subjects: [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1998

44. Search for CP violation in the decay of tagged $\overline{K}^0$ and $K^0$ to $\pi^{0}\pi^{0}\pi^{0}$

Author: Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eleftheriadis, C, Faravel, L, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Gerber, H J, Go, A, Haselden, A, Hayman, P J, Henry-Coüannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Müller, A, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, I, Wolter, M, Zavrtanik, D, and Zimmerman, D
Subjects: Particle Physics - Experiment
Abstract: The CPLEAR experiment measured the eigentime-dependent asymmetry in the rates of initially tagged \kzerob\ and \kzero\ decaying to \threepizero\ in order to study the interference between the CP-violating \kshort\ and the CP-conserving \klong\ decay amplitudes. Without assuming CPT invariance, we obtain for the CP-violation parameter \etazero\ the values $\reetazero = 0.18 \pm 0.14_{\mbox{stat.}} \pm 0.06_{\mbox{syst.}} $ and $\imetazero = 0.15 \pm 0.20_{\mbox{stat.}} \pm 0.03_{\mbox{syst.}} .$ Requiring \reetazero\ to be equal to \ree\ we obtain $\imetazero = -0.05 \pm 0.12_{\mbox{stat.}} \pm 0.05_{\mbox{syst.}} .$ The corresponding upper limit for the branching ratio of the $\kshort \ra \threepizero$ decay is deduced to be $B_{\kshort\ra\threepizero} < 1.9 \times 10^{-5}$ at the 90\% confidence level.
Published: 1998

45. The neutral kaon decays to pi(+)pi(-)pi(0): a detailed analysis of the CPLEAR data

Author: Angelopoulos, A Apostolakis, A Aslanides, E Backenstoss, G and Bargassa, P Behnke, O Benelli, A Bertin, V Blanc, F and Bloch, P Carlson, P Carroll, M Cawley, E Chertok, MB and Danielsson, M Dejardin, M Derre, J Ealet, A and Eleftheriadis, C Faravel, L Fassnacht, P Fetscher, W and Fidecaro, M Filipcic, A Francis, D Fry, J Gabathuler, E and Gamet, R Gerber, HJ Go, A Haselden, A Hayman, PJ and Henry-Couannier, F Hollander, RW Jon-And, K Kettle, PR and Kokkas, P Kreuger, R Le Gac, R Leimgruber, F Mandic, I and Manthos, N Marel, G Mikuz, M Miller, J Montanet, F and Nakada, T Pagels, B Papadopoulos, I Pavlopoulos, P and Polivka, G Rickenbach, R Roberts, BL Ruf, T Schafer, M and Schaller, LA Schietinger, T Schopper, A Tauscher, L and Thibault, C Touchard, F Touramanis, C Van Eijk, CWE and Vlachos, S Weber, P Wigger, O Wolter, M Zavrtanik, D and Zimmerman, D
Subjects: High Energy Physics::Experiment
Abstract: A detailed analysis of neutral kaons decaying to pi(+)pi(-)pi(0) is presented based on the complete data set containing half a million events. Time-dependent decay rate asymmetries are measured between initially tagged K-0 and (K) over bar(0) and for different regions of the phase space. These asymmetries, resulting from the interference between the CP-coaserving decay amplitude of K-L and the decay amplitude of K-S - either CP-violating or CP-conserving - allow the determination of the K-S parameters eta(+-0) (CP-violating) and lambda (CP-conserving), and also of the main isospin components of the K-S decay amplitude. The branching ratio of K-S –> pi(+)pi(-)pi(0) (CP-conserving) is deduced directly from lambda. In addition, we extract the slope parameters describing the energy dependence of the K-L –> pi(+)pi(-)pi(0) Dalitz plot. The whole set of out. results fits well within the current phenomenological picture of the neutral-kaon system including CP violation and Chiral Perturbation Theory (ChPT).
Published: 1998

46. A determination of the CPT violation parameter Re($\delta$) from the semileptonic decay of strangeness-tagged neutral kaons

Author: 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., 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., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B L., Ruf, T., Schdfer, M., Schaller, L A., Schietinger, T., Schopper, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Van Eijk, C W E., Vlachos, S., Wigger, O., Wolter, M., Zavrtanik, D., Zimmerman, D., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CPLEAR, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment
Abstract: We have improved by two orders of magnitude the limit currently available for the CPT violation parameter \red . To this purpose we have analyzed the full sample of neutral-kaon decays to \semi\ recorded in the CPLEAR experiment, where the strangeness of the neutral kaons was tagged at production and decay time. An appropriate function of the measured decay rates, including information from the analysis of \pip\pim\ decay channel, gives directly \red . The result $\red = (3.0 \pm 3.3_\mathrm{{stat}} \pm 0.6_\mathrm{{syst}}) \times 10^{-4}$ is compatible with zero. Values for the parameters $\imd$, $\rexm$ and $\imxp$ were also obtained.
Published: 1998

47. Search for CP violation in the decay of tagged $\overline{K}^0$ and $K^0$ to $\pi^{0}\pi^{0}\pi^{0}$

Author: Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Cawley, E., Chertok, M B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Faravel, L., Fetscher, W., Fidecaro, M., Filipcic, A., 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., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B L., Ruf, T., Schafer, 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, I., Wolter, M., Zavrtanik, D., Zimmerman, D., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), CPLEAR, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published: 1998

48. Measurement of the CP-violation parameter eta(00) using tagged (K)over-bar(0) and K-0

Author: Angelopoulos, A Apostolakis, A Aslanides, E Backenstoss, G and Bargassa, P Behnke, O Benelli, A Bertin, V Blanc, F and Bloch, P Carlson, P Carroll, M Carvalho, J Cawley, E and Charalambous, S Chardin, G Chertok, MB Cody, A and Danielsson, M Dejardin, M Derre, J Ealet, A and Eleftheriadis, C Evangelou, I Faravel, L Ferreira-Marques, R and Fetscher, W Fidecaro, M Filipcic, A Francis, D Fry, J Gabathuler, E Gamet, R Garreta, D Gerber, HJ Go, A and Haselden, A Hayman, PJ Henry-Couannier, F Hollander, RW and Hubert, E Jon-And, K Kettle, PR Kokkas, P Kreuger, R and Le Gac, R Leimgruber, F Liolios, A Machado, E and Mandic, I Manthos, N Marel, G Mikuz, M Miller, J and Montanet, F Muller, A Nakada, T Pagels, B Papadopoulos, I Pavlopoulos, P da Cunha, JP Policarpo, A Polivka, G and Rickenbach, R Roberts, BL Ruf, T Sakeliou, L and Sanders, P Schafer, M Schaller, LA Schietinger, T and Schopper, A Tauscher, L Thibault, C Touchard, F and Touramanis, C Triantis, F Van Beveren, E Van Eijk, CWE and Vlachos, S Weber, P Wigger, O Wolter, M Yeche, C and Zavrtanik, D Zimmerman, D CPLEAR Collaboration
Abstract: {The CP-violation parameter eta(00) is determined through the eigentime-dependent asymmetry in the rates of initially tagged (K) over bar(0) and K-0 decaying to pi(0) pi(0). From the analysis of the complete data set we obtain the values \textbackslash{}eta(00)\textbackslash{} = {[}2.47 +/- 0.31(stat) +/- 0.24(syst.)] x 10(-3) and phi(00) = 42.0(0) +/- 5.6(stat.)(0) +/- 1.9(syst.)(0). (C) 1998 Elsevier Science B.V.}
Published: 1998

49. Search for CP violation in the decay of tagged (K)over-bar(0) and K-0 to pi(0)pi(0)pi(0)

Author: 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., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Faravel, L., Fetscher, W., Fidecaro, M., Filipcic, J., 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., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Schafer, 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., and Cplear Collaboration
Abstract: The CPLEAR experiment measured the eigentime-dependent asymmetry in the rates of initially tagged (K) over bar(o) and K-o decaying to pi(o) pi(o) pi(o) in order to study the interference between the CP-violating K-S and the CP-conserving K-L decay amplitudes. Without assuming CPT invariance, we obtain for the CP-violation parameter eta(ooo) the values Re(eta(ooo))= 0.18 +/- 0.14(stat.) +/- 0.06(syst.) and Im(eta(ooo)) = 0.15 +/- 0.20(stat) +/- 0.03(syst:) Requiring Re(eta(ooo)) to be equal to Re(epsilon) we obtain Im(eta(ooo)) = -0.05 +/- 0.12(stat.) +/- 0.05(syst:) The corresponding upper limit for the branching ratio of the K-S --> pi(o) pi(o) pi(o) decay is deduced to be BKs --> pi o pi o pi o
Published: 1998

50. Direct determination of two-pion correlations for pp -> 2 pi(+)2 pi(-) annihilation at rest

Author: Angelopoulos, A Apostolakis, A Aslanides, E Backenstoss, G and Bargassa, P Behnke, O Benelli, A Bertin, V Blanc, F and Bloch, P Carlson, P Carroll, M Carvalho, J Cawley, E and Charalambous, S Chardin, G Chertok, MB Cody, A and Danielsson, M Dejardin, M Derre, J Ealet, A and Eleftheriadis, C Evangelou, I Faravel, L Ferreira-Marques, R and Fetscher, W Fidecaro, M Filipcic, A Francis, D Fry, J Gabathuler, E Gamet, R Garreta, D Gerber, HJ Go, A and Haselden, A Hayman, PJ Henry-Couannier, F Hollander, RW and Hubert, E Jon-And, K Kettle, PR Kokkas, P Kreuger, R and Le Gac, R Leimgruber, F Liolios, A Locher, MP and Machado, E Mandic, I Manthos, N Marel, G Markushin, VE and Mikuz, M Miller, J Montanet, F Muller, A Nakada, T and Pagels, B Papadopoulos, I Pavlopoulos, P da Cunha, JP and Policarpo, A Polivka, G Rickenbach, R Roberts, BL and Ruf, T Sakeliou, L Sanders, P Schafer, M Schaller, LA and Schietinger, T Schopper, A Soares, A Tauscher, L and Thibault, C Touchard, F Touramanis, C Triantis, F Van Beveren, E Van Eijk, CWE Vlachos, S Weber, P Wigger, O and Wolter, M Yeche, C Zavrtanik, D Zimmerman, D
Subjects: Nuclear Theory, Nuclear Experiment
Abstract: We study pi pi correlations in the exclusive reaction (p) over bar p –> 2 pi(+)2 pi(-) at rest measured by the CPLEAR experiment. Avoiding the introduction of an arbitrary reference sample, we analyse differential distributions for equal charge pion pairs removing the phase-space factor event by event. A peak at small relative momenta is most pronounced for large total momentum of the pair. The physical implications of bosonic symmetrization for the properties of the pion source, in particular its radius, are briefly discussed. The two extremes considered are the chaotic Hanbury-Brown-Twiss mechanism and the coherent Skyrmion model.
Published: 1998

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247 results on '"Polivka, G."'

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