Precise Measurement of pi+ -> e+ nu Branching Ratio

Precise Measurement of pi+ -> e+ nu Branching Ratio

The PEN Collaboration is conducting a new measurement of the pi+ -> e+ nu branching ratio at the Paul Scherrer Institute, with the goal uncertainty of delta B/B(pie2)=5E-4 or lower. At present, the combined accuracy of all published pie2 decay measurements lags behind the theoretical calculation...

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Veröffentlicht in:arXiv.org 2008-12
Hauptverfasser: Frlež, E, Alonzi, L P, Baranov, V A, Bertl, W, Bychkov, M, Bystritsky, Yu M, Khomutov, N V, Korenchenko, A S, Korenchenko, S M, Korolija, M, Kozlowski, T, Kravchuk, N P, Kuchinsky, N A, Mekterović, D, Mzhavia, D, Palladino, A, Počanić, D, Robmann, P, Rozhdestvensky, A M, Sidorkin, V V, Straumann, U, Supek, I, Truöl, P, van der Schaaf, A, Velicheva, E P, Volnykh, V P
Format: Artikel
Sprache:eng
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Configuration management
Physics - High Energy Physics - Experiment
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Zusammenfassung:The PEN Collaboration is conducting a new measurement of the pi+ -> e+ nu branching ratio at the Paul Scherrer Institute, with the goal uncertainty of delta B/B(pie2)=5E-4 or lower. At present, the combined accuracy of all published pie2 decay measurements lags behind the theoretical calculation by a factor of 40. In this contribution we report on the PEN detector configuration and its performance during two development runs done in 2007 and 2008.
ISSN:2331-8422
DOI:10.48550/arxiv.0812.2829