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  1. Article: Precise measurement of the pi+-->pi0 e+nu branching ratio.

    Pocanić, D / Frlez, E / Baranov, V A / Bertl, W / Brönnimann, Ch / Bychkov, M / Crawford, J F / Daum, M / Khomutov, N V / Korenchenko, A S / Korenchenko, S M / Kozlowski, T / Kravchuk, N P / Kuchinsky, N A / Li, W / Minehart, R C / Mzhavia, D / Ritchie, B G / Ritt, S /
    Rozhdestvensky, A M / Sidorkin, V V / Smith, L C / Supek, I / Tsamalaidze, Z / VanDevender, B A / Wang, Y / Wirtz, H-P / Ziock, K O H

    Physical review letters

    2004  Volume 93, Issue 18, Page(s) 181803

    Abstract: Using a large acceptance calorimeter and a stopped pion beam we have made a precise measurement of the rare pi(+)-->pi(0)e(+)nu (pi(beta)) decay branching ratio. We have evaluated the branching ratio by normalizing the number of observed pi(beta) decays ... ...

    Abstract Using a large acceptance calorimeter and a stopped pion beam we have made a precise measurement of the rare pi(+)-->pi(0)e(+)nu (pi(beta)) decay branching ratio. We have evaluated the branching ratio by normalizing the number of observed pi(beta) decays to the number of observed pi(+)-->e(+)nu (pi(e2)) decays. We find the value of Gamma(pi(+)-->pi(0)e(+)nu)/Gamma(total)=[1.036+/-0.004(stat)+/-0.004(syst)+/-0.003(pi(e2))]x10(-8), where the first uncertainty is statistical, the second systematic, and the third is the pi(e2) branching ratio uncertainty. Our result agrees well with the standard model prediction.
    Language English
    Publishing date 2004-10-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.93.181803
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Precise measurement of the pion axial form factor in the pi+-->e+nugamma decay.

    Frlez, E / Pocanić, D / Baranov, V A / Bertl, W / Bychkov, M / Khomutov, N V / Korenchenko, A S / Korenchenko, S M / Kozlowski, T / Kravchuk, N P / Kuchinsky, N A / Li, W / Minehart, R C / Mzhavia, D / Ritchie, B G / Ritt, S / Rozhdestvensky, A M / Sidorkin, V V / Smith, L C /
    Supek, I / Tsamalaidze, Z / VanDevender, B A / Velicheva, E P / Wang, Y / Wirtz, H-P / Ziock, K O H

    Physical review letters

    2004  Volume 93, Issue 18, Page(s) 181804

    Abstract: We have studied radiative pion decays pi(+)-->e(+)nugamma in three broad kinematic regions using the PIBETA detector and a stopped pion beam. Based on Dalitz distributions of 41 601 events we have evaluated absolute pi-->enugamma branching ratios in the ... ...

    Abstract We have studied radiative pion decays pi(+)-->e(+)nugamma in three broad kinematic regions using the PIBETA detector and a stopped pion beam. Based on Dalitz distributions of 41 601 events we have evaluated absolute pi-->enugamma branching ratios in the three regions. Minimum chi(2) fits to the integral and differential (E(e(+)),E(gamma)) distributions result in the axial-to-vector weak form factor ratio of gamma identical with F(A)/F(V)=0.443(15), or F(A)=0.0115(4) with F(V)=0.0259. However, deviations from standard model predictions in the high-E(gamma)-low-E(e(+)) kinematic region indicate the need for further theoretical and experimental work.
    Language English
    Publishing date 2004-10-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.93.181804
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Bonn / Germany

    Z 4' 58/153: Show issues

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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