[PDF] Top 20 Search for pair production of first and second generation leptoquarks in proton-proton collisions at $\sqrt{s}$ = 8  TeV

... that of an electromagnetic ...hit in at most one pixel layer, and must be within ...cm of the matched primary vertex in the barrel ...set of criteria optimized for ... See full document

... sets of variables retained as input to the BDT are reported in Table ...assessment of the discriminating power of each variable, these rep- resent the most reduced, while effective, sets ... See full document

... Uncertainties in the modelling of the top-quark pair and single-top-quark (Wt) backgrounds are sub- dominant in SRA and dominant in ...samples and those of ... See full document

... discovery of a Higgs boson by the ATLAS and CMS experiments in 2012 [1–3] opened a new field for exploration in particle ...Z) and its indirect coupling to photons, which in the ... See full document

... squark production and coloron production are simulated using the MADGRAPH ...[29], and their decays are simulated using the PYTHIA ...partons, and each top squark decays into two jets ... See full document

... colleagues in the CERN accelerator departments for the excellent performance of the LHC ...technical and administrative staffs at CERN and other CMS institutes, and acknowledge ... See full document

... efficient at high top-quark boosts yet reduces multijet ...distance in ðη; ϕÞ between the lepton and the nearest jet, and p T;rel ðl; jetÞ is the transverse momentum of the lepton with ... See full document

... quark and neutralino), or (ii) through flavor-changing (FC) interactions mediated by an invisi- ble bosonic state (for instance, ug → u → tυ, where u, g, t, and υ are an up quark, gluon, top quark, ... See full document

... migration of events between neighbouring bins in p T jet is expected because of the energy resolution, mainly between the first and second bins ( < 30%), while migrations ... See full document

... features of SUSY can survive with a modest amount of fine tuning if sparticles are not much heavier than their SM ...particles in particular, the mass difference between a particle and its ... See full document

... gramme and the European Research Council and EPLANET (Euro- pean Union); the Leventis Foundation; the Alfred ...Ministry of Education, Youth and Sports (MEYS) of the Czech Republic; the ... See full document

... simulation and they include t¯t þ jets, W → q 0 ¯q þ jets, Z → q ¯q þ jets, and diboson (WW, ZZ, WZ) ...normalization of t¯t þ jets, the largest resonant back- ground, is assessed in a control ... See full document

... combination of several searches for the electroweak production of charginos and neutralinos is ...use proton-proton collision data at √ s = 13 TeV, recorded ... See full document

... A search has been performed for vector-like quarks coupled to light quarks, produced in either single-production or pair-production processes, in proton-proton ... See full document

... The first search for CP-violating effects in top quark-antiquark events has been ...The search is performed in the electron + jets and muon + jets final states, with one top ... See full document

... modelling of the backgrounds is validated by comparing the expected event distributions to the data in two control re- ...efficiency of 80%, while requiring at least one of them to fail ... See full document

... t production, which is simulated at NLO using powheg v2 [17–20] ...jets and W boson + jets production are modeled using MadGraph [12] , with the MLM matching scheme [21] , and up to ... See full document

... leptons, and their kinematic properties, are similar between the CRs and SR, and thus that the scale factors SF BG CR1 ( central ) are ...variety of generators (M AD G RAPH , PYTHIA , ... See full document

... discovery of a Higgs boson [1–3], the standard model (SM) may be ...mass, and dark matter, questions of naturalness, and hierarchy problems for which the SM offers no ...variety of ... See full document

... The first level of the trigger system, com- posed of custom hardware processors, uses information from the calorimeters and muon de- tectors to select events that pass the trigger requirements ... See full document