2007
DOI: 10.1103/physrevd.76.072006
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Search for new particles leading toZ+jetsfinal states inpp¯collisions ats

Abstract: We present the results of a search for new particles that lead to a Z boson plus jets in p p collisions at s p 1:96 TeV using the Collider Detector at Fermilab (CDF II). A data sample with a luminosity of 1:06 fb ÿ1 collected using Z boson decays to ee and is used. We describe a completely data-based method to predict the dominant background from standard model Z jet events. This method can be similarly applied to other analyses requiring background predictions in multijet environments, as shown when validatin… Show more

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Cited by 38 publications
(19 citation statements)
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“…An additional fourth family of quarks is permitted in speculative unification models with masses around 220-280 GeV/c 2 [3]; however, attempts to find a fourth family of heavier quarks have set a lower limit of 250 GeV/c 2 on the masses of additional bottom-like [4] or top-like [5] quarks.…”
Section: Quarksmentioning
confidence: 99%
“…An additional fourth family of quarks is permitted in speculative unification models with masses around 220-280 GeV/c 2 [3]; however, attempts to find a fourth family of heavier quarks have set a lower limit of 250 GeV/c 2 on the masses of additional bottom-like [4] or top-like [5] quarks.…”
Section: Quarksmentioning
confidence: 99%
“…On the experimental front, the Tevatron (CDF) bound is presented in Ref. [16] and is also discussed in Ref. [17].…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, since theb 1 will be reconstructed as a b quark, the signature of second sbottomb 2 will be very similar to that of a heavy B quark which decays via B → Zb, b 2 → h 0 b. Searches for B → Zb have been carried out by ATLAS [72,73], CMS [74][75][76], and CDF [77]. While the CDF [77] search does not constrain the second sbottom, the ATLAS 7 TeV search [73] explicitly covers masses heavier than 200 GeV, and the quoted upper limit on the cross section appears to rule out the second sbottom in the mass range of 200-230 GeV. Furthermore, the ATLAS 8 TeV search [72] explicitly covers masses heavier than 350 GeV, and rules out sbottoms in the mass range 450-450 GeV.…”
Section: Stealth Regimementioning
confidence: 99%