1. Study of KS KL Coupled Decays and KL -Be Interactions with the CMD-2 Detector at VEPP-2M Collider
- Author
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V.A. Sidorov, Igor Nesterenko, B.O Baibusinov, A.E Sher, I. A. Koop, N.M. Ryskulov, J. A. Thompson, E.A. Perevedentsev, N.I. Root, G.V. Fedotovich, D.H Brown, M.A Shubin, V.G Zavarzin, V.V Danilov, Yu. M. Shatunov, A.P. Lysenko, S.I. Eidelman, A.A. Ruban, S.I. Redin, V.M. Titov, A.A. Grebeniuk, Yu.V. Yudin, A. Bondar, L.M. Barkov, A.A. Polunin, V.P. Smakhtin, A.I. Sukhanov, E.V Popkov, D.N. Grigoriev, V.M Aulchenko, B.A. Shwartz, E.V Anashkin, A.V Maksimov, B.I. Khazin, Alexander Skrinsky, B.L. Roberts, I.B. Logashenko, V. S. Banzarov, E. P. Solodov, G.A Aksenov, A.S. Kuzmin, V.I Ptitzyn, P.M. Ivanov, D.V. Chernyak, V.S. Okhapkin, I.G. Snopkov, S. K. Dhawan, Yu.I Merzlyakov, S.E Baru, T. A. Purlats, P.A. Lukin, C.M Valine, W. A. Worstell, V. W. Hughes, N. Gabyshev, P. Cushman, R.R. Akhmetshin, and J. P. Miller
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Luminosity (scattering theory) ,Meson ,Detector ,High Energy Physics::Phenomenology ,Charged particle ,law.invention ,High Energy Physics - Experiment ,Nuclear physics ,Angular distribution ,law ,High Energy Physics::Experiment ,Collider ,Beam (structure) - Abstract
The integrated luminosity about 4000 inverse nanobarn of around phi meson mass ( 5 millions of phi mesons) has been collected with the CMD-2 detector at the VEPP-2M collider. A latest analysis of the KS KL coupled decays based on 30 % of available data is presented in this paper. The KS KL pairs from phi meson decays were reconstructed in the drift chamber when both kaons decayed into two charged particles. From a sample of 1423 coupled decays a selection of candidates to the CP violating KL into pi+ pi- decay was performed. CP violating decays were not identified because of the domination of events with a KL regenerating at the Be beam pipe into KS and a background from KL semileptonic decays. The regeneration cross section of 110 MeV/c KL mesons was found to be 53 +- 17 mb in agreement with theoretical expectations. The angular distribution of KS mesons after regeneration and the total cross section of KL for Be have been measured., Comment: 14 pages, 8 figures
- Published
- 1997