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    高師機構典藏 NKNUIR > 理學院 > 物理學系 > 期刊論文 >  Item 987654321/10635
    Please use this identifier to cite or link to this item: http://ir.nknu.edu.tw/ir/handle/987654321/10635


    題名: Measurement Of The Helicity Of W Bosons In Top Quark Decays
    Authors: 郭榮升
    T. Affolder;Rurng-Sheng Kuo
    貢獻者: 物理系
    Date: 2000-01-10
    Issue Date: 2010-11-11 09:06:31 (UTC+8)
    Abstract: We use the transverse momentum spectrum of leptons in the decay chain t→bW with W→lν to measure the helicity of the W bosons in the top quark rest frame. Our measurement uses a tt¯ sample isolated in 106±4pb−1 of data collected in pp¯ collisions at s√=1.8TeV with the CDF detector at the Fermilab Tevatron. Assuming a standard V−A weak decay, we find that the fraction of W's with zero helicity in the top rest frame is F0=0.91±0.37(stat)±0.13(syst), consistent with the standard model prediction of F0=0.70 for a top mass of 175GeV/c2.
    關聯: Phys. Rev. Lett. / Vol. 84, Iss. 2, 216
    Appears in Collections:[物理學系] 期刊論文
    [物理系] 郭榮升

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