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    National Tsing Hua University Institutional Repository > 理學院 > 物理系 > 期刊論文 >  Z decay into a bottom quark, a light sbottom, and a light gluino


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/55643


    Title: Z decay into a bottom quark, a light sbottom, and a light gluino
    Authors: Cheung K;Keung WY
    教師: 張敬民
    Date: 2003
    Publisher: American Physical Society
    Relation: PHYSICAL REVIEW D, American Physical Society, Volume 67, Issue 1, JAN 1 2003
    Keywords: PRODUCTION CROSS-SECTION
    1.8 TEV
    POVER-BAR COLLISIONS
    ROOT-S=1.8 TEV
    Abstract: The discrepancy between the measured and theoretical production cross section of b quarks at the Fermilab Tevatron can probably be explained by the recently proposed scenario of light gluinos of mass 12-16 GeV and light sbottoms of mass 2-5.5 GeV. In this scenario, we study a related process at the Z pole, Z-->b (b) over tilde (*)(1)(g) over tilde+(b) over tilde(b) over tilde (1)(g) over tilde followed by (g) over tilde -->b (b) over tilde (*)(1)/(b) over tilde(b) over tilde (1). The hadronic branching ratio for this channel is (1-3)x10(-3), which is of the order of the size of the uncertainty in R-b. We find that a typical event consists of an energetic prompt bottom jet back to back with a "fat" bottom jet, which consists of a bottom quark and two bottom squarks. Such events with a 10(-3) branching ratio may affect the measurement of R-b; they are even more interesting if the fat bottom jet can be identified.
    URI: http://www.aps.org/
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/55643
    Appears in Collections:[物理系] 期刊論文

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