Determination of the branching ratios $Γ(K_L \to 3 π^0) / Γ (K_L \to π^+ π^- π^0)$ and $Γ(K_L \to 3 π^0) / Γ(K_L \to πe ν)$

Autor: A. KreutzFachbereich Physik, Universität Gesamthochschule Siegen, Germany, M. Holder(Fachbereich Physik, Universität Gesamthochschule Siegen, Germany), M. Rost(Fachbereich Physik, Universität Gesamthochschule Siegen, Germany), R. Werthenbach(Fachbereich Physik, Universität Gesamthochschule Siegen, Germany), K. J. Peach(Edinburgh, UK), H. Blümer(Universität Mainz, Germany), R. Heinz(Universität Mainz, Germany), K. Kleinknecht(Universität Mainz, Germany), P. Mayer(Universität Mainz, Germany), B. Panzer(Universität Mainz, Germany), B. Renk(Universität Mainz, Germany), H. Rohrer(Universität Mainz, Germany), A. Wagner(Universität Mainz, Germany), E. Augé(Université de Paris-Sud, France), D. Fournier(Université de Paris-Sud, France), L. Iconomidou-Fayard(Université de Paris-Sud, France), O. Perdereau(Université de Paris-Sud, France), A. C. Schaffer(Université de Paris-Sud, France), L. Serin(Université de Paris-Sud, France), L. Bertanza(INFN, Pisa, Italy), A. Bigi(INFN, Pisa, Italy), P. Calafiura(INFN, Pisa, Italy), M. Calvetti(INFN, Pisa, Italy), R. Carosi(INFN, Pisa, Italy), R. Casali(INFN, Pisa, Italy), C. Cerri(INFN, Pisa, Italy), I. Mannelli(INFN, Pisa, Italy), V. Marzulli(INFN, Pisa, Italy), A. Nappi(INFN, Pisa, Italy), G. M. Pierazzini(INFN, Pisa, Italy)

Improved branching ratios were measured for the $K_L \to 3 \pi^0 $ decay in a neutral beam at the CERN SPS with the NA31 detector: $\Gamma (K_L \to 3 \pi^0) / \Gamma (K_L \to \pi^+ \pi^- \pi^0) = 1.611 \pm 0.037$ and $\Gamma (K_L \to 3 \pi^0) / \Gamm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______3061::1cadbd55f7516f168ee302f95f029b54
http://www.openaccessrepository.it/record/17205

Search for the decay KL→π0e+e−

Autor: Ken Peach, G.D. Barr, Lydia Iconomidou-Fayard, H.N. Nelson, G. Kesseler, Ian Shipsey, H. Burkhardt, B. Pijlgroms, Daniel Fournier, W. Weihs, H. Rohrer, Konrad Kleinknecht, H. Blümer, H. D. Wahl, B. Panzer, W. Stephenson, Arthur Schaffer, M. Kasemann, P. Mayer, N. Doble, A. M. Lutz, A. Bigi, I. Mannelli, R. Hagelberg, L. Bertanza, M. Holder, Ph. Heusse, V. Gibson, H. G. Sander, Peter Clarke, C. Cerri, J. van der Lans, G. Zech, J. Steinberger, B. Renk, J. Muir, E. Augé, D. J. Candlin, G. M. Pierazzini, R.L. Chase, H. Taureg, T. Miczaika, R. Casali, C. Youngman, G. Quast, M. Corti, D. Coward, A. Nappi, R. Heinz, R. Carosi, D.C. Cundy, P. Calafiura, M. Calvetti, M. Rost, R. Black, L. Gatignon, I. Harrus

Publikováno v: Physics Letters B. 214:303-306

A search for the decay KL→π0e+e− has been performed at the CERN SPS. One candidate event has been found, compatible with an expected background of 1.5 events. The corresponding upper limit for the branching ration is Γ(KL→π0e+e−)Γ(KL →

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e31eb9547ec09b7c70ad956cfca1923d
https://doi.org/10.1016/0370-2693(88)91486-4

First evidence for direct CP violation

Autor: W. Weihs, H. G. Sander, Ken Peach, R.L. Chase, H. Burkhardt, W. Stephenson, G. Dietrich, B. Pijlgroms, Daniel Fournier, M. Corti, R. Carosi, D.C. Cundy, D. Coward, E. Massa, Clemens Becker, J. Muir, Ian Shipsey, D. J. Candlin, J. Steinberger, B. Panzer, Konrad Kleinknecht, G. M. Pierazzini, D. Heyland, A. M. Lutz, G. Kesseler, N. Doble, H. Blümer, A. Bigi, I. Mannelli, Lydia Iconomidou-Fayard, R. Casali, C. Cerri, W. Heinen, Arthur Schaffer, M. Holder, Ph. Heusse, Peter Clarke, M. Kasemann, C. Youngman, G. Gargani, R. Hagelberg, G. Quast, E. Augé, J. van der Lans, G. Zech, A. Nappi, H. Taureg, M. Calvetti, M. Rost, H. D. Wahl, L. Gatignon, R. Black, T. Miczaika, B. Renk, V. Gibson

Publikováno v: INSPIRE-HEP
Physics Letters B
Physics Letters B, Elsevier, 1988, 206, pp.169-176
XXIV International Conference on High Energy Physics ISBN: 9783642741388

Since CP violation was first observed in the decay of the long-lived neutral kaon into two pions [1], it remains one of the enigmas in particle physics. Whilst CP violation is manifest in neutral kaon decays, the search for CP-violating effects has e

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd6980b180e32dd3a193daa22920b020

The beam and detector for a high-precision measurement of cp violation in neutral-kaon decays

Autor: E. Massa, H. Taureg, E. Auge, M. Calvetti, C. Youngman, M. Rost, B. Panzer, G. Kesseler, A. M. Lutz, A. Nappi, S. Galeotti, R. Carosi, D.C. Cundy, M. Kasemann, W. Heinen, Ian Shipsey, R. Hagelberg, D. Heyland, A. Bigi, I. Mannelli, Gunter Quast, R. Black, R. Chase, J. Steinberger, H. Blümer, F. Eisele, G. M. Pierazzini, L. Gatignon, M. Holder, Ph Heusse, H. D. Wahl, J. Muir, G. Dietrich, D. J. Candlin, T. Miczaika, R. Casali, W. Stephenson, W. Weihs, M. Corti, H. G. Sander, G. Zech, P. Steffen, J. van der Lans, B. Renk, C. Cerri, R. Fantechi, H. Burkhardt, Peter Clarke, N. Doble, Ken Peach, B. Pijlgroms, Daniel Fournier, Konrad Kleinknecht, Arthur Schaffer, Clemens Becker, D. Passuello

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 1988, 268, pp.116-143

The K0 beam and detector used for a high-precision measurement of the CP-violation parameter ϵ′ at the CERN Super Proton Synchrotron (SPS) are described. The beam provides KL and KS alternately through a common decay region. The detection of the d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66c00fce60a543b1c396eae7fadb8a2b
http://hal.in2p3.fr/in2p3-00021133