4 research outputs found

    Search for B-s(0)-\u3emu(+)mu(-) and B-s(0)-\u3emu(+)mu(-) decays in p(p)over-bar collisions with CDF II

    Get PDF
    We report on a search for B-s(0)-\u3emu(+)mu(-) and B-d(0)-\u3emu(+)mu(-) decays in p (p) over bar collisions at root s=1.96 TeV using 364 pb(-1) of data collected by the CDF II detector at the Fermilab Tevatron Collider. After applying all selection requirements, we observe no candidates inside the B-s(0) or B-d(0) mass windows. The resulting upper limits on the branching fractions are B(B-s(0)-\u3emu(+)mu(-))\u3c 1.5x10(-7) and B(B-d(0)-\u3emu(+)mu(-))\u3c 3.9x10(-8) at 90% confidence level

    Update of the search for charginos nearly mass-degenerate with the lightest neutralino

    No full text
    The data collected by DELPHI in 1998 at the centre-of-mass energy of 189 GeV have been used to update the search for charginos nearly mass-degenerate with the lightest supersymmetric particle, which is assumed to be the lightest neutralino. Mass differences below Delta M = 3 GeV/c(2) are considered. No excess of events with respect to the Standard Model expectation has been observed, and exclusions in the plane of Delta M versus chargino mass are given. The new Delta M independent lower limit on the mass of the chargino is 62.4 GeV/c(2) in the higgsino scenario (which includes the gaugino mass unification scenario), if all sfermions are heavier than the lightest chargino. In the approximation of large sfermion masses the limit is 59.8 GeV/c(2), independently of the field content. (C) 2000 Published by Elsevier Science B.V

    Search for [corrected] B0(s) --> mu+ mu- and B0(d) [corrected] --> mu + mu- decays in pp collisions with CDF II.

    No full text
    We report on a search for B0(s) --> mu+ mu- and B0(d) --> mu + mu- decays in pp collisions at square root(s) = 1.96 TeV using 364 pb(-1) of data collected by the CDF II detector at the Fermilab Tevatron Collider. After applying all selection requirements, we observe no candidates inside the B0(s) or B0(d) mass windows. The resulting upper limits on the branching fractions are B(B0(s) --> mu+ mu-) < 1.5 x 10(-7) and B(B0(d) --> mu+ mu-) < 3.9 x 10(-8) at 90% confidence level

    Search for B-s(0)->mu(+)mu(-) and B-s(0)->mu(+)mu(-) decays in p(p)over-bar collisions with CDF II

    Get PDF
    We report on a search for Bs0 → μ+μ- and Bd0 → μ+μ- decays in pp̄ collisions at √s = 1.96 TeV using 364pb-1 of data collected by the CDFÂ II detector at the Fermilab Tevatron Collider. After applying all selection requirements, we observe no candidates inside the Bs0 or Bd0 mass windows. The resulting upper limits on the branching fractions are B(Bs0 → μ+μ) <1.5 X 10-7 and B(Bd0 → μ+μ-) < 3.9 X 10-8 at 90% confidence level. © 2005 The American Physical Society.0F.I. 7,2180American Physical Societyinfo:eu-repo/semantics/publishe
    corecore