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تسجيل مستخدم جديدSearch for first generation leptoquark pair production in the electron + missing energy + jets final state
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We present a search for the pair production of first generation scalar leptoquarks (LQ) in data corresponding to an integrated luminosity of 5.4 fb$^{-1}$ collected with the D0 detector at the Fermilab Tevatron Collider in ppbar collisions at $sqrt{s}=1.96$ TeV. In the channel $LQ bar{LQ} rightarrow e u_e qq$, where q, q are u or d quarks, no significant excess of data over background is observed, and we set a 95% C.L. lower limit of 326 GeV on the leptoquark mass, assuming equal probabilities of leptoquark decays to eq and $ u_e q$.
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We report the result of a search for the pair production of the lightest supersymmetric partner of the top quark ($tilde{t}_1$) in $pbar{p}$ collisions at a center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider corresponding to an integ
rated luminosity of 5.4 fb$^{-1}$. The scalar top quarks are assumed to decay into a $b$ quark, a charged lepton, and a scalar neutrino ($tilde{ u}$), and the search is performed in the electron plus muon final state. No significant excess of events above the standard model prediction is detected, and improved exclusion limits at the 95% C.L. are set in the the ($M_{tilde{t}_1}$,$M_{tilde{ u}}$) mass plane.
We present a search for the pair production of scalar top quarks ($tilde{t}_{1}$), the lightest supersymmetric partners of the top quarks, in $pbar{p}$ collisions at a center-of-mass energy of 1.96 TeV, using data corresponding to an integrated lumin
osity of {7.3 $fb^{-1}$} collected with the dzero experiment at the Fermilab Tevatron Collider. Each scalar top quark is assumed to decay into a $b$ quark, a charged lepton, and a scalar neutrino ($tilde{ u}$). We investigate final states arising from $tilde{t}_{1} bar{tilde{t}_{1}} rightarrow bbar{b}mutau tilde{ u} tilde{ u}$ and $tilde{t}_{1} bar{tilde{t}_{1}} rightarrow bbar{b}tautau tilde{ u} tilde{ u}$. With no significant excess of events observed above the background expected from the standard model, we set exclusion limits on this production process in the ($m_{tilde{t}_{1}}$,$m_{tilde{ u}}$) plane.
Leptoquarks occur in many new physics scenarios and could be the next big discovery at the LHC. The purpose of this paper is to point out that a model-independent search strategy covering all possible leptoquarks is possible and has not yet been full
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