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13 results on '"J.C. Dousse"'

1. Level scheme of 194Ir

Author

Jolie Cizewski, A.V. Murzin, T. von Egidy, W. Schwitz, I.A. Kondurov, N. Krāmere, P. A. Sushkov, T. Krasta, S. A. Kerr, Vladimir Paar, F. Hoyler, P. Prokofjevs, L. I. Simonova, H. Lindner, M.K. Balodis, J. Bērzinš, J.C. Dousse, J. Kern, U. Mayerhofer, K. Schreckenbach, A. Walter, J. Klora, H.G. Boerner, Vjera Lopac, Yu. E. Loginov, P. Geltenbort, Robert Georgii, Slobodan Brant, G.G. Colvin, A. Raemy, and V.A. Libman

Subjects
Physics, Nuclear reaction, Nuclear and High Energy Physics, Neutron capture, Spectrometer, Excited state, Resonance, Neutron, Atomic physics, Nuclear Experiment, Quantum number, Spectroscopy
Abstract

Levels of 194 Ir were studied using neutron capture and ( d , p ) reaction spectroscopy. A pair spectrometer was used to measure the high-energy γ-ray spectrum from thermal-neutron capture in an enriched 193 Ir target over the energy range 4640–6100 keV. From the same reaction, low-energy γ-radiation was studied using curved-crystal spectrometers, and conversion electrons were observed with magnetic spectrometers. Prompt and delayed γγ-coincidences were measured using semiconductor and scintillation detectors. Averaged resonance capture measurements were performed with 2 keV and 24 keV neutrons for primary transitions leading to excitation energies from 0 to 580 keV. Using 22 MeV deuterons, the 193 Ir( d , p ) high resolution spectra were observed with a magnetic spectrograph. The deduced nuclear level scheme of 194 Ir includes 38 levels connected by 184 transitions. Unambiguous spins and parities were determined for 25 levels. The rotor-plus-particle model was used for the interpretation of the level scheme assuming a strong mixing for Nilsson configurations having identical parities and K quantum numbers. IBFFM model calculations were performed and the obtained results were compared with the experimental level scheme.

Published
1998

2. Inclusive measurement of $$\bar p$$ annihilation at rest in gaseous hydrogen to final states containingρ andf 2

Author

R. Le Gac, E. Aslanides, J. R. Fry, P. Bloch, G. S. Varner, P. Sanders, J.C. Dousse, T. Alhalel, Christopher Bee, Mats Danielsson, R. Adler, A. Haselden, Ioannis Evangelou, O. Wigger, R.W. Hollander, M. Chardalas, M.B. Chertok, K. Jon-And, P. Gumplinger, L. Sakeliou, A.J.P.L. Policarpo, L. Faravel, H.-J. Gerber, Jeffrey Boone Miller, Stef. Charalambous, Per Carlson, T. Nakada, W. Fetscher, J. K. Bienlein, K. Sarigiannis, E. Gabathuler, L. Sacks, R. Richkenbach, D.A. Troster, W.G. Heyes, C.W.E. van Eijk, G. Polivka, A. Go, H. Postma, Christer Fuglesang, R. Gamet, Nikolaos Manthos, P. Fassnacht, Sp. Dedoussis, Ch. Bula, M. Schafer, A. Liolios, Lukas A. Schaller, P. Pavlopoulos, F. Henry-Couannier, A. Soares, C. Touramanis, Marcin Wladyslaw Wolter, C. Witzig, P. Weber, J. Bennet, J. Derre, M. Fidecaro, P. F. Harrisch, F. Pelucchi, Frixos A Triantis, B. Eckart, A. Angelopoulos, J. Pinto da Cunha, D. Zimmerman, C. Thibault, O. Behnke, C. Kochowski, T. Lawry, M. Mikuž, D. Francis, T. Geralis, B. L. Roberts, Danilo Zavrtanik, B. Pagels, C. Eleftheriadis, A. Schopper, R. Ferreira-Marques, P. Maley, Andras Kerek, P.J. Hayman, Igor Mandić, Francois Touchard, A. Onofre, Panagiotis Kokkas, C. Felder, C. Yeche, V. Bertin, P.R. Kettle, L. Tauscher, G. Chardin, Jean-Louis Faure, E. Machado, D. Garreta, J. Kern, G. Backenstoss, R. Kreuger, A. Apostolakis, Andrej Filipcic, H.U. Johner, Claude Guyot, A. Cody, S. Vlachos, G. Marel, E. Cawley, J. Duclos, T. Ruf, K. Jansson, E. van Beveren, Marc Dejardin, E. Rozaki, M. Dodgson, Claudio Santoni, João Carvalho, F. Montanet, Ph. Schune, and A. Ealet

Subjects
Physics, Annihilation, Physics and Astronomy (miscellaneous), Hydrogen, Meson, Gaseous hydrogen, chemistry.chemical_element, Elementary particle, Nuclear physics, chemistry, Antiproton, Quantum field theory, Atomic physics, Engineering (miscellaneous)
Abstract

Antiproton annihilation at rest in gaseous hydrogen (16 bar pressure) to the final states ρ(770)X andf2(1270)X, whereX stands for one or more neutral mesons, has been studied at LEAR using the CPLEAR detector. Relative branching ratios are given forX =π0,2π0, 3π0 ω in the ρ case, and forX =π0, η in thef2 case. The annihilation channel\(\bar pp \to \rho 3\pi ^0 \) has not been measured before. The fraction of P-wave annihilation is deduced from the ratiof2π0/ρπ0 to be 0.38±0.07, in good agreement with the result previously obtained by CPLEAR from the ratioK+K-/π+π-.

Published
1995

3. Bose-Einstein correlations in $$\bar p$$ p annihilations at rest

Author

P. Fassnacht, P. Sanders, A.J.P.L. Policarpo, Claudio Santoni, O. Behnke, K. Jon-And, A. Schopper, A. Haselden, P.J. Hayman, Jeffrey Boone Miller, M. Mikuž, D. Francis, L. Faravel, K. Sarigiannis, João Carvalho, F. Montanet, D. Zimmerman, C. Touramanis, E. van Beveren, R.W. Hollander, E. Rozaki, Christopher Bee, P. Weber, R. Gamet, B. Eckart, Frixos A Triantis, L. Tauscher, R. Le Gac, F. Touchard, Andras Kerek, E. Machado, L.A. Schaller, E. Aslanides, T. Nakada, L. Sacks, H. Postma, C. Fuglesang, T. Geralis, A. Apostolakis, J. Bennet, R. Kreuger, J. Duclos, T. Ruf, Igor Mandić, M. Dodgson, J. R. Fry, G. S. Varner, Danilo Zavrtanik, K. Jansson, A. Cody, Philippe Bloch, Ioannis Evangelou, P. Carlson, W. Fetscher, P. Gumplinger, L. Sakeliou, P. Maley, Sp. Dedoussis, S. Vlachos, C. Felder, D.A. Troster, C. Witzig, C. Yeche, M. Chardalas, G. Marel, F. Henry-Couannier, M.B. Chertok, M. Schafer, E. Cawley, C.W.E. van Eijk, P. Pavlopoulos, Marc Dejardin, V. Bertin, R. Ferreira-Marques, Mats Danielsson, R. Adler, P.F. Harrison, Ph. Schune, A. Ealet, C. Kochowski, B. Pagels, A. Go, Andrej Filipcic, H.U. Johner, Claude Guyot, A. Soares, C. Thibault, C. Eleftheriadis, G. Chardin, Jean-Louis Faure, D. Garreta, J. Kern, G. Backenstoss, Ch. Bula, M. Fidecaro, Panagiotis Kokkas, Stef. Charalambous, G. Polivka, P.-R. Kettle, Nikolaos Manthos, A. Liolios, Marcin Wladyslaw Wolter, J. Derre, F. Pelucchi, A. Angelopoulos, T. Lawry, E. Gabathuler, R. Rickenbach, J.C. Dousse, T. Alhalel, J. Pinto da Cunha, H.-J. Gerber, A. Onofre, W.G. Heyes, O. Wigger, J. K. Bienlein, and B.L. Roberts

Subjects
Physics, Nuclear physics, Correlation function (statistical mechanics), Particle physics, Pion, Physics and Astronomy (miscellaneous), Antiproton, Symmetrization, Elementary particle, Bose–Einstein correlations, Wave function, Engineering (miscellaneous), Exponential function
Abstract

Two-charged-pion correlations were studied in\(\bar p\)p(→2π*2π−nπ0,n≥0) annihilations at rest with the CPLEAR detector at the Low-Energy Antiproton Ring (LEAR). A strong enhancement was found in the production of pairs of like-sign pions with a small value of the relative fourmomentumQ, with respect to pairs of unlike-sign pions. The observed enhancement was interpreted as a consequence of the Bose-Einstein symmetrization of the two-pion wave function. The data are well represented by a correlation function parametrized as a double-Gaussian; an exponential parametrization is also statistically acceptable. The value of the correlation strength is found to be >1. The high-quality large data samples together with the ability for K± identification and final-state separation allowed the study of systematic effects impacting on theQ dependence of the correlation function and on the extracted space parameters of the pion sources.

Published
1994

4. Two pion Bose-Einstein correlations in p annihilations at rest

Author

G. Chardin, Jean-Louis Faure, D. Garreta, J. Kern, G. Backenstoss, C. Thibault, C. Eleftheriadis, Ch Yèche, Francois Touchard, B. Eckart, Stef. Charalambous, Christer Fuglesang, G. Polivka, J. Pinto da Cunha, H. Postma, K. Sarigiannis, Sp. Dedoussis, R. Le Gac, J. R. Fry, P. Gumplinger, Andras Kerek, J. Duclos, M. Dejardin, A. Go, Ph. Schune, M. Schafer, T. Ruf, M. Chardalas, A. Onofre, A. Soares, R. Kreuger, A. Ealet, Kerstin Jon-And, Christopher Bee, K. Jansson, Nikolaos Manthos, P. Pavlopoulos, Ioannis Evangelou, G. S. Varner, A. Liolios, A. Schopper, B.L. Roberts, P.J. Hayman, J.P. Miller, E. van Beveren, T. Nakada, R. Garnet, Ch. Bula, P.R. Kettle, L. Tauscher, C. Witzig, V. Bertin, W. Fetscher, E. Machado, O. Wigger, Elie Aslanides, J. K. Bienlein, M. Fidecaro, M. Van den Putte, A. Alhalel, J.C. Dousse, P. Fassnacht, S. Vlachos, O. Wolter, G. Marel, J. Bennet, E. Cawley, Marko Mikuz, A. Apostolakis, Mats Danielsson, D.A. Troester, H.-J. Gerber, R. Adler, Igor Mandić, Danilo Zavrtanik, E. Gabathuler, R. Rickenbach, D. Zimmerman, E. Rozaki, W.G. Heyes, C. Kochowski, P. Carlson, R. Ferreira-Marques, B. Pagels, David Francis, C.W.E. van Eijk, P. Sanders, S. Szilagyi, Theodoros Geralis, A. Angelopoulos, P.F. Harrison, A.J.P.L. Policarpo, P. Bloch, J. Derre, Panagiotis Kokkas, F. Pelucchi, P. Weber, C. Touramanis, R.W. Hollander, Frixos A Triantis, T. Lawry, L.A. Schaller, Claudio Santoni, Andrej Filipcic, H.U. Johner, João Carvalho, F. Montanet, Claude Guyot, C. Felder, M. Dodgson, P. Maley, L. Sakeliou, L. Faravel, and L. Sacks

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pion, Large Hadron Collider, Nuclear Theory, Detector, High Energy Physics::Experiment, Bose–Einstein correlations, Multiplicity (chemistry), Nuclear Experiment
Abstract

Bose-Einstein (BE) correlations between like-sign charged pions were studied in pp annihilations at rest into four-prong events, using data taken with the CPLEAR detector at LEAR (CERN). A strong enhancement was found in the production of pairs of like-sign pions of similar momenta, with respect to the pairs of unlike-sign pions. The observed BE- enhancement was used to extract the values for the strength λ of the effect and the radius r of the pion emitting source. The extracted value of λ >l is of relevant importance and clearly does not depend on the assumed parametrization of the correlation function. The influence of the normalization and fitting procedure, the detector resolution, the resonances production and decay and the neutral-pion multiplicity cuts, on the size of the pion source and the strength of the effect was investigated.

Published
1993

5. Determination of the relative branching ratios for

Author

Philippe Bloch, Andrej Filipcic, Ch. Bula, Stef. Charalambous, D. Warner, J. Derre, A. Go, C. Felder, H.U. Johner, Claude Guyot, L. Sakeliou, T. Geralis, D.A. Troester, G. Backenstoss, H. Postma, E. van Beveren, T. Lawry, C.W.E. van Eijk, J.C. Dousse, David Francis, L. Tauscher, P. Fassnacht, L. Faravel, M. Fidecaro, E. Aslanides, J. Duclos, H.-J. Gerber, R. Kreuger, João Carvalho, G. Marel, C. Touramanis, Christer Fuglesang, W.G. Heyes, E. Kossionides, A. Apostolakis, L. Sacks, T. Paradelis, Frixos A Triantis, R. Le Gac, G. S. Varner, E. Machado, P. Weber, K. Jansson, K. Sarigiannis, L.A. Schaller, A. Onofre, J. R. Fry, J. Bennet, B.L. Roberts, T. Nakada, P. Marotte, Sp. Dedoussis, F. Montanet, A. Schopper, Christopher Bee, P.J. Hayman, P. Pavlopoulos, R. Gamet, Jean-Louis Faure, R. Ferreira-Marques, M. Dodgson, Panagiotis Kokkas, S. Szilagyi, P.F. Harrison, S. Vlachos, D. Garreta, J. Kern, T. Ruf, C. Burgun, M. Van den Putte, W. Fetscher, C. Thibault, E. Gabathuler, R. Rickenbach, Francois Touchard, M. Mikuž, P. Maley, A. Ealet, Danilo Zavrtanik, R.W. Hollander, Ch Yèche, B. Eckart, R. Adler, P. Sanders, M. Chardalas, C. Santoni, A.J.P.L. Policarpo, F. Pelucchi, C. Witzig, C. Kochowski, B. Pagels, Jeffrey Boone Miller, D. Zimmerman, J. Pinto da Cunha, P. Gumplinger, Per Carlson, Marc Dejardin, Andras Kerek, E. Rozaki, P.-R. Kettle, H. Cobbaert, A. Angelopoulos, Kerstin Jon-And, Nikolaos Manthos, Ph. Schune, and U. Seljak

Subjects
Physics, Nuclear and High Energy Physics, Pair production, Annihilation, Pion, Meson, Branching fraction, Antiproton, Protonium, Hadron, Analytical chemistry, Atomic physics
Abstract

The ratio of the branching fractions for p p →K+K− and p p →π+π− was determined with the CPLEAR detector, by stopping antiprotons in a gaseous hydrogen target at 15 bar pressure. It was found to be BR(K+K−)/BR(π+π−)=0.205± 0.016. The fraction of P-wave annihilation at rest at this target density was deduced to be (38±9)%.

Published
1991

6. A study of T violation via the semileptonic decays of neutral kaons in CPLEAR

Author

E. Gabathuler, Stef. Charalambous, R. Rickenbach, L. Tauscher, M. Mikuž, G. Polivka, P. Sanders, E. Machado, A.J.P.L. Policarpo, I. Evangelou, R. Ferreira-Marques, Panagiotis Kokkas, B. Eckart, S. Szilagyi, P.F. Harrison, E. Rozaki, Ph. Schune, P. Fassnacht, J. Bennet, C. Witzig, A. Ealet, A. Schopper, K. Sarigiannis, H. J. Johner, H. Postma, M. Van den Putte, Sp. Dedoussis, Andrej Filipcic, C. Thibault, A. Go, P. Bloch, T. Geralis, Danilo Zavrtanik, R. Gamet, C. Eleftheriadis, Elie Aslanides, A. Apostolakis, P.J. Hayman, Igor Mandić, R. Kreuger, L.A. Schaller, J. Duclos, B.L. Roberts, D. Zimmerman, Christopher Bee, P.-R. Kettle, Jeffrey Boone Miller, P. Carlson, Claude Guyot, Francois Touchard, V. Bertin, D.A. Troster, C. Felder, A. Soares, Mats Danielsson, R. Adler, Ch. Bula, T. Ruf, O. Wigger, C.W.E. van Eijk, Andras Kerek, M. Schafer, C. Yeche, J. Pinto da Cunha, G. Chardin, Jean-Louis Faure, W. Fetscher, K. Jansson, D. Garreta, J. Kern, C. Kochowski, J. K. Bienlein, G. Backenstoss, M. Fidecaro, J.C. Dousse, T. Alhalel, B. Pagels, C. Touramanis, M. Dejardin, Christer Fuglesang, Frixos A Triantis, E. van Beveren, R.W. Hollander, Kerstin Jon-And, P. Gumplinger, M. Chardalas, Nikolaos Manthos, R. Le Gac, H.-J. Gerber, A. Onofre, P. Pavlopoulos, A. Liolios, P. Maley, W.G. Heyes, A. Angelopoulos, Marcin Wladyslaw Wolter, J. Derre, F. Pelucchi, T. Lawry, S. Vlachos, G. Marel, E. Cawley, J. R. Fry, G. S. Varner, L. Sakeliou, L. Faravel, L. Sacks, P. Weber, Claudio Santoni, João Carvalho, F. Montanet, M. Dodgson, T. Nakada, David Francis, 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
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], CP violation, 010306 general physics, 01 natural sciences
Abstract

The method for studying semileptonic neutral kaon decays at CPLEAR is presented together with a preliminary data analysis. For the first time a direct determination of T violation is shown to be possible and low statistics results are given. From the same data the K(L)-K(S) mass difference, DELTAm, the CP violation parameter of K(S), epsilon(S), and the parameter x testing the DELTAS = DELTAQ rule are also obtained. Nuclear Physics A

Published
1992

7. Recent results on CP violation from the CPLEAR experiment

Author

E. Rozaki, E. Aslanides, L. Faravel, Marc Dejardin, P. Weber, Christer Fuglesang, J. Derre, Nikolaos Manthos, P Harrison, R. Le Gac, E. Machado, Ch Yèche, B. Eckart, J. Pinto da Cunha, M. Chardalas, A. Liolios, H. Postma, T. Nakada, J. Duclos, D. Zimmerman, L. Sacks, C. Bula, G. Burgun, T. Ruf, R. Ferreira-Marques, J. Bennet, E. Gabathuler, P. Maley, C. Guyot, A. Apostolakis, V. Bertin, P.-R. Kettle, G. Backenstoss, F. Pelucchi, K. Jansson, F. Montanet, H.U. Johner, P. Fassnacht, A. Schopper, P. Gumplinger, Andras Kerek, S. Szilagyi, T. Lawry, A. Onofre, P.J. Hayman, Ludwig Tauscher, C. Felder, D.A. Troester, Mats Danielsson, R. Adler, C. Witzig, W. Fetscher, J.C. Dousse, T. Alhalel, O. Wigger, Ioannis Evangelou, C.W.E. van Eijk, M. W. Wolter, Theodoros Geralis, L. Sakeliou, A. Go, H.-J. Gerber, J. K. Bienlein, F. Touchard, Per Carlson, C. Touramanis, E. Cawley, C. Kochowski, Philippe Bloch, Frixos A Triantis, W.G. Heyes, A. Ealet, B. Pagels, J. Kern, R.W. Hollander, S. Dedoussis, David Francis, Ph. Schune, K. Jon-And, M. Mikuz, I. Mandić, Jeffrey Boone Miller, Sotirios Vlachos, M. Schafer, R. Gamet, A. Angelopoulos, L.A. Schaller, R. Kreuger, Claudio Santoni, G. Marel, A. Filipčič, João Carvalho, Danilo Zavrtanik, P. Sanders, S. Charalambous, A.J.P.L. Policarpo, G. Varner, M. Dodgson, C. Thibault, C. Eleftheriadis, Jean-Louis Faure, D. Garreta, G. Polivka, R.L. Roberts, K. Sarigiannis, J. R. Fry, P. Pavlopoulos, M. Van den Putte, Christopher Bee, R. Rickenbach, M. Fidecaro, Panagiotis Kokkas, 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), Morales A., 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, Nuclear and High Energy Physics, Particle physics, Antiparticle, Meson, 010308 nuclear & particles physics, Strangeness, 7. Clean energy, 01 natural sciences, Atomic and Molecular Physics, and Optics, Nuclear physics, Particle decay, Pair production, Pion, Antimatter, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], CP violation, High Energy Physics::Experiment, 010306 general physics
Abstract

The CPLEAR experiment is aiming at precise CP violation tests using initially pure K0- and K0BAR beams from the intense source provided by the annihilation of the LEAR pBAR-beam in hydrogen. The strangeness tagging efficiency and the systematic errors have been studied and found to be in agreement with the design specifications. The measurement of the differential time asymmetry of the pi+pi- decays allowed the direct observation of differences in the decay rates of particles and antiparticles.The CP violating parameters were determined as \eta+/-\ = (2.32 +/- 0.14) . 10(-3) and phi+/- = 42.3-degrees +/- 4.4-degrees. First results in the reconstruction and analysis of the neutral kaon decays into two neutral pions and the K(e)3 decay are presented. Nuclear Physics B

Published
1992

8. Recent results from the CP Lear experiment

Author

Andras Kerek, J. Pinto de Cunha, Christer Fuglesang, R. Gamet, Lukas A. Schaller, Claudio Santoni, W. Fetscher, G. Burgun, P. Weber, David Francis, J. R. Fry, G. S. Varner, J.C. Dousse, T. Alhalel, E. V. Van Beverin, P.R. Kettle, L. Tauscher, E. Gabathuler, R. Rickenbach, T. Nakada, H.-J. Gerber, R. Adler, J. Duclos, G. Chardin, Jean-Louis Faure, H. Cobbaert, João Carvalho, A. Apostolakis, W.G. Heyes, T. Ruf, D. Garreta, J. Kern, G. Backenstoss, A. Schopper, L. Faravel, K. Jansson, D. Zimmerman, Kerstin Jon-And, C. Thibault, P. Carlson, P.J. Hayman, J.P. Miller, Nikolaos Manthos, P. Sanders, B. L. Roberts, U. Seljak, R. Legac, Ph. Schune, Sp. Dedoussis, J. Derre, B. Eckart, R. Ferreira-Marques, A. Go, P. Gumplinger, M. Dodgson, S. Szilagyi, L. Sakeliou, Francois Touchard, Elie Aslanides, T. Lawry, Ch. Bula, Theodoros Geralis, Stef. Charalambous, D. Warner, L. Sacks, T. Paradelis, Sotirios Vlachos, A. Ealet, A. Angelopoulos, C. Touramanis, R.W. Hollander, M. Van den Putte, P. Pavlopoulos, Frixos A Triantis, Patrick Fassnacht, A. Onofre, M. Fidecaro, K. Sargiannis, P. Bloch, J. Bennet, Danilo Zavrtanik, Marko Mikuz, D.A. Troester, C.W.E. van Eijk, Panagiotis Kokkas, E. Machado, Paul Fraser Harrison, Andrej Filipcic, H.U. Johner, Claude Guyot, H. Postma, F. Pelucchi, C. Witzig, P. Maley, C. Kochowski, E. Kossianides, C. Felder, B. Pagels, C. Yeche, Marc Dejardin, E. Rozaki, A.J.P.L. Policarpo, F. Montanet, Christopher Bee, P. Marotte, R. Kreuger, G. Marel, and M. Chardalis

Subjects
Nuclear physics, Physics, Particle physics, Large Hadron Collider, Early results, Parametric analysis, CPT symmetry, media_common.quotation_subject, CP violation, Particle, High Energy Physics::Experiment, Asymmetry, media_common
Abstract

We describe the status of experiment PS195, which is under way on LEAR at CERN to study CP violation starting with pure K0 or K0 states. Early results on backgrounds and systematic effects agree with expectations from the original proposal. An asymmetry in particle‐anti‐particle partial decay rates has been seen for the first time.

Published
1992

9. Status of the CP LEAR experiment and first results

Author

P. Bloch, J. Duclos, P. Gumpliger, J. R. Fry, G. S. Varner, E. Kossionides, K. Jansson, G. Burgun, P. Weber, P. Pavlopoulos, L. Sakeliou, B. Eckart, H. Cobbaert, Lukas A. Schaller, Sp. Dedoussis, Marko Mikuz, A. Onofre, D.A. Troester, Kerstin Jon-And, E. Gabathuler, R. Rickenbach, L. Faravel, Nikolaos Manthos, Claudio Santoni, U. Seljak, R. Gamet, R. Ferreira-Marques, A. Go, P. Sanders, Jean-Louis Faure, C. Witzig, J. Pinto da Cunha, P. Carlson, Theodoros Geralis, G. Marel, Ch. Bula, D. Garreta, C. W. W. Van Eijk, S. Szilagyi, J. Kern, G. Backenstoss, D. Zimmerman, C. Fuglesang, M. Fidecaro, P.R. Kettle, L. Tauscher, A. Schopper, David Francis, F. Montanet, C. Thibault, C. B. Bee, B. L. Roberts, P.J. Hayman, A. Apostolakis, João Carvalho, H. J. Johner, Andras Kerek, R.W. Hollander, L. Sacks, C. Touramanis, W. Fetscher, T. Paradelis, Eef van Beveren, K. Sarigianis, T. Nakada, R. Le Gac, Francois Touchard, J. Derre, Frixos A Triantis, Stef. Charalambous, R. Adler, Panagiotis Kokkas, Sotirios Vlachos, T. Lawry, J.C. Dousse, H.-J. Gerber, W.G. Heyes, A. Angelopoulos, M. Chardalas, Danilo Zavrtanik, T. Ruf, J. Bennet, Patrick Fassnacht, Elie Aslanides, P. F. Harrison, M. Dodgson, E. Machado, C. Kochowski, Andrej Filipcic, B. Pagels, Claude Guyot, C. Felder, M. Van de Putte, H. Postma, F. Pelucchi, P. Maley, J. S. Miller, Marc Dejardin, E. Rozaki, A.J.P.L. Policarpo, P. Marotte, R. Kreuger, A. Ealet, 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, Damoiseaux, Magali, 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, Nuclear and High Energy Physics, Antiparticle, Large Hadron Collider, Meson, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, 01 natural sciences, Atomic and Molecular Physics, and Optics, 3. Good health, Nuclear physics, Moment (mathematics), Pair production, Antiproton, Antimatter, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], High Energy Physics::Experiment, 010306 general physics
Abstract

The aim of the CP LEAR experiment is to study symmetry-violation effects, making use of tagged K0's and K0's. The detector, although missing some electronic components, has been operational for a few weeks at the end of 1989 at the CERN Low-Energy Antiproton Ring (LEAR). At the moment, the analysis of the data is in progress. This paper gives a description of the experimental method and of the detector; the sensitivities of some measurements and some preliminary results are also discussed.

Published
1990

10. Coincident neutron-proton emission from proton bombardment ofSr87andZr91

Author

J.C. Dousse, E.D. Arthur, J. W. Sunier, Nelson Stein, D.M. Drake, J. D. Moses, and J. Gursky

Subjects
Nuclear reaction, Physics, Nuclear and High Energy Physics, Proton, Neutron detection, Neutron, Atomic physics, Proton emission, Inelastic neutron scattering, Spectral line, Charged particle
Abstract

Cross sections were measured for the reactions /sup 87/Sr+p..-->.. /sup 86/Sr+pn and /sup 91/Zr+p..-->.. /sup 90/Zr+pn using two time-of-flight neutron detectors located at 65/sup 0/ and 100/sup 0/, and a charged particle telescope at 135/sup 0/. Results are presented for several incident energies from 14.0 to 17.6 MeV. They are compared with Hauser-Feshbach calculations, with which they substantially agree.

Published
1985

11. Energy of a muonic X-ray transition measured with a crystal spectrometer

Author

W. Schwitz, P. Ebersold, I. Beltrami, Th.v. Ledebur, B. Aas, J.C. Dousse, W. Beer, H.J. Leisi, R. Eichler, W.W. Sapp, and J. Kern

Subjects
Physics, Nuclear and High Energy Physics, Wavelength, X-ray, Gamma ray, Crystal spectrometer, Atomic physics, Energy (signal processing)
Abstract

The wavelength of the 3 d 5 2 −2 p 3 2 muonic X-ray transition in 28Si has been measured relative to the wavelength of the 84 keV gamma ray from a 170Tm source. The result is λSi/λTm = 1.099675 (39). Using the reported value for λTm we find (λexpSi-λthSi)/λthSi = (−9±35) × 10−6.

Published
1978

12. Recent results of the CPLEAR experiment

Author

H. Postma, J.C. Dousse, T. Alhalel, H.-J. Gerber, W.G. Heyes, J. Duclos, B. Eckart, T. Ruf, K. Jansson, Marcin Wladyslaw Wolter, J. Derre, F. Pelucchi, T. Lawry, B.L. Roberts, Kerstin Jon-And, Nikolaos Manthos, A. Liolios, Jeffrey Boone Miller, P. Weber, R. Ferreira-Marques, S. Szilagyi, L. Sakeliou, P.F. Harrison, M. Chardalas, P. Gumplinger, Lukas A. Schaller, G. Chardin, Jean-Louis Faure, A. Go, J. Pinto da Cunha, Andras Kerek, P. Sanders, M. Van den Putte, D. Garreta, J. Kern, P. Bloch, Marko Mikuz, Ch. Bula, G. Backenstoss, Christopher Bee, P. Fassnacht, M. Dejardin, A. Apostolakis, A. Soares, W. Fetscher, P.J. Hayman, M. Fidecaro, A.J.P.L. Policarpo, David Francis, C.W.E. van Eijk, D. Zimmerman, P. Carlson, O. Wigger, Theodoros Geralis, A. Onofre, E. Gabathuler, E. Rozaki, R. Rickenbach, R. Kreuger, Christer Fuglesang, C. Touramanis, R. Gamet, R. Le Gac, Frixos A Triantis, V. Bertin, D.A. Troster, C. Witzig, J. R. Fry, R.W. Hollander, Panagiotis Kokkas, T. Nakada, G. S. Varner, J.K. Bielein, K. Sarigiannis, G. Marel, E. Cawley, J. Bennet, Elie Aslanides, Igor Mandić, Mats Danielsson, R. Adler, C. Thibault, P. Pavlopoulos, A. Angelopoulos, A. Schopper, C. Kochowski, C. Eleftheriadis, B. Pagels, S. Vlachos, Francois Touchard, E. van Beveren, Stef. Charalambous, Ph. Schune, A. Ealet, G. Polivka, L. Faravel, L. Sacks, M. Schafer, Claudio Santoni, Andrej Filipcic, João Carvalho, F. Montanet, I. Evangelou, H.U. Johner, Claude Guyot, P. Maley, P.R. Kettle, L. Tauscher, Danilo Zavrtanik, E. Machado, Sp. Dedoussis, M. Dodgson, C. Felder, C. Yeche, 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, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, 010308 nuclear & particles physics, 0103 physical sciences, Measure (physics), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, 01 natural sciences
Abstract

The CPLEAR experiment at CERN has been designed to measure CP and T violating effects in the neutral kaon system by observing particle-antiparticle asymmetries. The motivation and the physics program of CPLEAR is presented and first analyses of the K0,K0BAR to pi+pi-, pi0pi0 and pi+pi-pi0 decays are discussed. Special emphasis is given to the recent results of the measurement of the CP violating parameters phi+- and eta+- based on first data taken in 1990/1991. Nuclear Physics A

13. First results from the CP lear experiment

Author

Sp. Dedoussis, H. Cobbaert, L. Faravel, H. Postma, F. Pelucchi, C. Fuglesang, E. Machado, A. Apostolakis, P.R. Kettle, L. Tauscher, C. B. Bee, Nikolaos Manthos, L. Sacks, T. Paradelis, U. Seljak, Andrej Filipcic, G. Burgun, J. Duclos, A. Ealet, G. Marel, P. Weber, P. Carlson, Patrick Fassnacht, K. Jansson, Claudio Santoni, P. Maley, Claude Guyot, P. F. Harrison, K. Sarigianis, T. Nakada, M. Van de Putte, P. Pavlopoulos, João Carvalho, J. R. Fry, E. Rozaki, G. S. Varner, A. Onofre, Lukas A. Schaller, M. Dodgson, A.J.P.L. Policarpo, C. Felder, David Francis, P. Marotte, K. Jon And, R. Kreuger, P. Sanders, J. S. Miller, Marc Dejardin, Danilo Zavrtanik, C. Thibault, B. L. Roberts, B. Eckart, R. Gamet, Francois Touchard, Stef. Charalambous, Jean-Louis Faure, D. Garreta, J. Kern, G. Backenstoss, Theodoros Geralis, A. Schopper, S. Szilagyi, P.J. Hayman, C. Touramanis, Frixos A Triantis, P. Gumpliger, D. Zimmerman, E. Kossionides, Marko Mikuz, D.A. Troester, L. Sakeliou, T. Ruf, Andras Kerek, J.C. Dousse, Elie Aslanides, H.-J. Gerber, W.G. Heyes, C. Witzig, R. Ferreira-Marques, J. Pinto da Cunha, F. Montanet, Ch. Bula, M. Fidecaro, W. Fetscher, M. Chardalas, R. Le Gac, J. Derre, Panagiotis Kokkas, T. Lawry, Sotirios Vlachos, A. Angelopoulos, P. Bloch, R.W. Hollander, J. Bennet, A. Go, C. Kochowski, B. Pagels, R. Adler, C. W. W. Van Eijk, E. Gabathuler, R. Rickenbach, E. van Beveren, and H. J. Johner

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, media_common.quotation_subject, CP violation, High Energy Physics::Experiment, Direct proof, Asymmetry, Atomic and Molecular Physics, and Optics, media_common
Abstract

The observation of the K0, K 0 decay asymmetry is a direct proof of CP violation. In this paper preliminary experimental results obtained by studying the decays into π+π− are reported.

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