Search for tb resonances in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector

Abstract

This Letter presents a search for tb resonances in 1.04/fb of LHC proton-proton collision data collected by the ATLAS detector at a center-of-mass energy of 7 TeV. Events with a lepton, missing transverse momentum, and two jets are selected and the invariant mass of the corresponding final state is reconstructed. The search exploits the shape of the tb invariant mass distribution compared to the expected Standard Model backgrounds. The model of a right-handed W'_R with Standard Model-like couplings is chosen as the benchmark model for this search. No statistically significant excess of events is observed in data, and upper limits on the cross section times the branching ratio of W'_R resonances at 95% CL lie in the range 6.1-1.0 pb for W'_R masses ranging from 0.5 to 2.0 TeV. These limits are translated into a lower bound on the allowed right-handed W'_R mass, giving m_{W'_R} > 1.13 TeV at 95% CL.

6 pages plus author list (20 pages total), 2 figures, 3 tables, revised author list, matches published PRL version

References in corpus (12)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Implications of CTEQ global analysis for collider observables
• Vector boson pair production at the LHC
• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production
• NNLL resummation for s-channel single top quark production
• Parton Distributions for LO Generators
• A practical Seedless Infrared-Safe Cone jet algorithm
• Search for the Production of Narrow tb Resonances in 1.9 fb-1 of ppbar Collisions at sqrt(s) = 1.96 TeV

Cited by in corpus (16)

• Implications of lepton flavor universality violations in B decays
• Search for heavy neutrinos and W bosons with right-handed couplings in proton-proton collisions at sqrt(s) = 8 TeV
• Signal of Right-Handed Charged Gauge Bosons at the LHC?
• Double Beta Decay, Lepton Flavour Violation and Collider Signatures of Left-Right Symmetric Models with Spontaneous D Parity Breaking
• Search for new resonances decaying via WZ to leptons in proton-proton collisions at sqrt(s) = 8 TeV
• Thermal Dark Matter from a Confining Sector
• Search for heavy neutrinos and W[R] bosons with right-handed couplings in a left-right symmetric model in pp collisions at sqrt(s) = 7 TeV
• Search for $W^{\prime }\to t\bar{b}$ in the lepton plus jets final state in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for exotic resonances decaying into WZ/ZZ in pp collisions at sqrt(s) = 7 TeV
• NLO+NLL limits on W' and Z' gauge boson masses in general extensions of the Standard Model
• Low-energy phenomenology of trinification: an effective left-right-symmetric model
• The Single Top Quark Physics
• Deconstructed Transverse Mass Variables
• Search for $W^{\prime }$ signal via $t{W}^{\prime }$ associated production at LHC
• Heavy Flavour Working Group Summary
• New Physics and Single Top Production