[PDF] Top 20 Search for direct slepton and gaugino production in final states with two leptons and missing transverse momentum with the ATLAS detector in pp collisions at √s=7 TeV

... The ATLAS experiment [33] is a multi-purpose particle physics detector with a forward–backward symmetric cylindrical geometry and nearly 4 π coverage in solid ...tracking detector (ID), and barrel ... See full document

... first search for supersymmetry in final states containing one isolated electron or muon, jets, and missing transverse momentum from p ffiffiffi s ¼ 7 TeV ... See full document

... in pp colli- sions, if the masses of the gluinos and squarks are large, the direct production of charginos, neutralinos and sleptons through electroweak interactions may dominate the ... See full document

... the production of W or Z bosons in association with heavy-flavour jets (referred to as W +hf and Z+hf) and the production of ...+hf production followed by Z → ν ν ¯ decay have the same signature as ... See full document

... the production cross section times acceptance times effi- ciency σ × A × ϵ , are extracted using the CL s modified frequentist approach [92] and considering the systematic uncertainties in the SM ... See full document

... Simulated signal samples were generated using Mad- Graph5 _aMC@NLO 2.2.3 interfaced to Pythia 8.186 with the A14 tune for the PS modelling, hadronisation, and under- lying event. The ME calculation is performed at tree ... See full document

... S. L. Barnes 85 , B. M. Barnett 131 , R. M. Barnett 16 , Z. Barnovska-Blenessy 5 , A. Baroncelli 134a , G. Barone 25 , A. J. Barr 120 , L. Barranco Navarro 166 , F. Barreiro 83 , J. Barreiro Guimarães da Costa 35a ... See full document

... E. Yu. Soldatov 98 , U. Soldevila 167 , A. A. Solodkov 130 , A. Soloshenko 65 , O. V. Solovyanov 130 , V. Solovyev 123 , P. Sommer 48 , H. Y. Song 33b , N. Soni 1 , A. Sood 15 , A. Sopczak 128 , B. Sopko 128 , V. Sopko ... See full document

... jet transverse momentum and on m c T are tightened, and more stringent thresholds on the second and third jets’ transverse momenta are ...leading two jets are usually the c-jets from the decay ... See full document

... Simulated signal samples were generated using Mad- Graph5 _aMC@NLO 2.2.3 interfaced to Pythia 8.186 with the A14 tune for the PS modelling, hadronisation, and under- lying event. The ME calculation is performed at tree ... See full document

... A search for direct top squark pair production resulting in events with either a same-flavour opposite-sign dilepton pair with invariant mass compatible with a Z boson or a pair of jets compatible ... See full document

... the production of t ¯ t pairs in asso- ciation with W/Z/h bosons and possibly additional jets, and production of t tt ¯ ¯ t, W/Z+jets and W W /W Z/ZZ (diboson) ...the production of three top quarks ... See full document

... specifically pp → χ χ ¯ þ X at the Large Hadron Collider (LHC) via some unknown intermediate state, are an important facet of the experimental program and provide sensitivity over a broad range of values of the ... See full document

... both direct decays and decays through an intermediate stage are kinematically allowed), the final state of bottom or top squark pair production depends on the branching ratios of the competing decay ... See full document

... Wγγ production, they also are expected to select appreciable backgrounds from t¯ tγ, Zγ and Zγγ events, and thus additional requirements are ...than two selected ...√ s = 8 TeV analysis [3], ... See full document

... pixel detector, a silicon microstrip detector, and, for |η| < ...and two overlapping photons originating from a π 0 ...A two-level trigger system is used to select events for offline ... See full document

... , direct ~ t ~ t is produced primarily through gluon fusion at the Large Hadron Collider ...The production cross section depends mostly on the mass of the top partner and has minimal dependence on other ... See full document

... and gaugino mass parameters m 0 and m 1=2 , a universal trilinear coupling parameter A 0 , the ratio of the vacuum expectation values of the two Higgs doublets tan, and the sign of the Higgsino mass ... See full document

... We acknowledge the support of ANPCyT, Argentina; YerPhI, Ar- menia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and ... See full document

... consists of a silicon pixel detector, a semiconductor microstrip detector, and a transition radiation tracker. The ID is surrounded by a thin superconducting solenoid providing a 2 T axial magnetic field. A ... See full document