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Measurement of eta meson decays into lepton-antilepton pairs
- Berlowski, M. (author)
- Bargholtz, Chr. (author)
- Bashkanov, M. (author)
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- Bogoslawsky, D. (author)
- Bondar, A. (author)
- Clement, H. (author)
- Demiroers, L. (author)
- Ivanov, G. (author)
- Jiganov, E. (author)
- Kuzmin, A. (author)
- Kuznetsov, A. (author)
- Laukhin, I. V. (author)
- Meier, R. (author)
- Morosov, B. (author)
- Oelert, W. (author)
- Pauly, C. (author)
- Petukhov, Y. (author)
- Povtorejko, A. (author)
- Scobel, W. (author)
- Shafigullin, R. (author)
- Shwartz, B. (author)
- Skorodko, T. (author)
- Sopov, V. (author)
- Stepaniak, J. (author)
- Tikhomirov, V. (author)
- Turowiecki, A. (author)
- Wagner, G. J. (author)
- Wolke, M. (author)
- Yamamoto, A. (author)
- Zabierowski, J. (author)
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- (creator_code:org_t)
- American Physical Society, 2008
- 2008
- English.
- In: Physical Review D. Particles and fields. - : American Physical Society. - 0556-2821 .- 1089-4918. ; 77:3, s. 032004-
- Journal article (peer-reviewed)
Abstract
Subject headings
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- A search for rare lepton decays of the eta meson was performed using the WASA detector at CELSIUS. Two candidates for double Dalitz decay eta -> e(+)e(-)e(+)e(-) events are reported with a background of 1.3 +/- 0.2 events. This allows to set an upper limit to the branching ratio of 9.7x10(-5) (90% CL). The branching ratio for the decay eta -> e(+)e(-)gamma is determined to (7.8 +/- 0.5(stat)+/- 0.8(syst))x10(-3) in agreement with world average value. An upper limit (90% CL) for the branching ratio for the eta -> e(+)e(-) decay is 2.7x10(-5) and a limit for the sum of the eta ->mu(+)mu(-)mu(+)mu(-) and eta ->pi(+)pi(-)mu(+)mu(-) decays is 3.6x10(-4).
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- Physics
- Fysik
- Nuclear physics
- Nuclear Physics
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- ref (subject category)
- art (subject category)
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- Berlowski, M.
- Bargholtz, Chr.
- Bashkanov, M.
- Bogoslawsky, D.
- Bondar, A.
- Calén, Hans
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- Cappellaro, Fili ...
- Clement, H.
- Demiroers, L.
- Ekström, Curt
- Fransson, Kjell
- Geren, L.
- Gustafsson, Leif
- Höistad, Bo
- Ivanov, G.
- Ruber, Roger J. ...
- Jiganov, E.
- Johansson, Tord
- Keleta, Samson
- Koch, Inken
- Kullander, Sven
- Kupsc, Andrzej
- Kuzmin, A.
- Kuznetsov, A.
- Laukhin, I. V.
- Lindberg, K.
- Marciniewski, Pa ...
- Meier, R.
- Morosov, B.
- Oelert, W.
- Pauly, C.
- Pettersson, Henr ...
- Petukhov, Y.
- Povtorejko, A.
- Schönning, Karin
- Scobel, W.
- Shafigullin, R.
- Shwartz, B.
- Skorodko, T.
- Sopov, V.
- Stepaniak, J.
- Tegnér, Per-Erik
- Thörngren Engblo ...
- Tikhomirov, V.
- Turowiecki, A.
- Wagner, G. J.
- Wolke, M.
- Yamamoto, A.
- Zabierowski, J.
- Zartova, Irina
- Zlomanczuk, Joze ...
- Bargholtz, Chris ...
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