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Search: (WFRF:(Strandberg A.)) srt2:(2005-2009) > (2005)

  • Result 11-13 of 13
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11.
  • Abazov, V. M., et al. (author)
  • Search for the flavour-changing neutral current B-s(0)->mu+mu- in p(p)over-bar collisions at root s=1.96 TeV with the D0 dectector
  • 2005
  • In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 94:7, s. 071802-
  • Journal article (peer-reviewed)abstract
    • We present the results of a search for the flavor-changing neutral current decay B-s(0)-->mu(+)mu(-) using a data set with integrated luminosity of 240 pb(-1) of p (p) over bar collisions at roots=1.96 TeV collected with the D0 detector in run II of the Fermilab Tevatron collider. We find the upper limit on the branching fraction to be B(B-s(0)-->mu(+)mu(-))less than or equal to5.0x10(-7) at the 95% C.L. assuming no contributions from the decay B-d(0)-->mu(+)mu(-) in the signal region. This limit is the most stringent upper bound on the branching fraction B-s(0)-->mu(+)mu(-) to date.
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12.
  • Abazov, V. M., et al. (author)
  • Search for Wbb(-) and WH production in pp(-) collisions at root s=1.96 TeV
  • 2005
  • In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 94:9, s. 091802-
  • Journal article (peer-reviewed)abstract
    • We present a search for Wb (b) over bar production in p (p) over bar collisions at root s=1.96 TeV in events containing one electron, an imbalance in transverse momentum, and two b-tagged jets. Using 174 pb(-1) of integrated luminosity accumulated by the D0 experiment at the Fermilab Tevatron collider, and the standard-model description of such events, we set a 95% C.L. upper limit on Wb (b) over bar production of 6.6 pb for b quarks with transverse momenta p(T)(b)> 20 GeV and b (b) over bar separation in pseudorapidity-azimuth space Delta R-bb> 0.75. Restricting the search to optimized b (b) over bar mass intervals provides upper limits on WH production of 9.0-12.2 pb for Higgs-boson masses of 105-135 GeV.
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  • Result 11-13 of 13

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