Leptonic top-quark asymmetry predictions at LHCb

Abstract

The forward LHCb acceptance offers the possibility of measuring the top-quark pair asymmetry in a kinematic region that does not receive overwhelming dilution from the symmetric gluon-fusion channel. To investigate this possibility, two leptonic final states are identified, and analysis strategies are proposed for each channel with 14~TeV data. Leading fixed-order predictions are then provided for the relevant leptonic asymmetry variables in each channel. If backgrounds can be experimentally constrained, statistically, a non-zero asymmetry is estimated to be observable beyond 5$\sigma$ confidence level with the full LHCb 14~TeV data.

7 pages, 4 figures, 6 tables. Directors cut: matches PRD version with updated references and comments

References in corpus (34)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• A Brief Introduction to PYTHIA 8.1
• FastJet user manual
• New parton distributions for collider physics
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• MCFM for the Tevatron and the LHC
• NLO single-top production matched with shower in POWHEG: s- and t-channel contributions
• Impact of Heavy Quark Masses on Parton Distributions and LHC Phenomenology
• W+W-, WZ and ZZ production in the POWHEG BOX
• Single-top t-channel hadroproduction in the four-flavour scheme with POWHEG and aMC@NLO
• Charge asymmetry of heavy quarks at hadron colliders
• Charge asymmetry in hadroproduction of heavy quarks
• Charge asymmetries of top quarks at hadron colliders revisited
• Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties
• The electroweak contribution to the top quark forward-backward asymmetry at the Tevatron
• Top quark and leptonic charge asymmetries for the Tevatron and LHC
• Vector boson plus one jet production in POWHEG
• Measurement of the forward-backward asymmetry in top quark-antiquark production in ppbar collisions using the lepton+jets channel
• Top-quark charge asymmetry and polarization in $t\bar{t}{W}^{\pm }$ production at the LHC
• Identification of beauty and charm quark jets at LHCb
• First observation of top quark production in the forward region
• Measurement of the asymmetry in angular distributions of leptons produced in dilepton ttbar final states in ppbar collisions at sqrt(s)=1.96 TeV
• Measurement of the leptonic asymmetry in ttbar events produced in ppbar collisions at sqrt(s)=1.96 TeV
• W b bbar production in POWHEG
• Measurements of the t t-bar charge asymmetry using the dilepton decay channel in pp collisions at sqrt(s) = 7 TeV
• Shedding light on the $t\bar{t}$ asymmetry: the photon handle
• Measurement of the forward-backward asymmetry in the distribution of leptons in $t\bar{t}$ events in the lepton+jets channel
• Top-Quark Charge Asymmetry Goes Forward: Two New Observables for Hadron Colliders
• Top LHCb Physics
• First measurement of the charge asymmetry in beauty-quark pair production at a hadron collider
• Feasibility of top quark measurements at LHCb and constraints on the large-$x$ gluon PDF
• Bottom-Quark Forward-Backward and Charge Asymmetries at Hadron Colliders
• Beauty-quark and charm-quark pair production asymmetries at LHCb

Cited by in corpus (8)

• Identification of beauty and charm quark jets at LHCb
• First observation of top quark production in the forward region
• Measurement of forward top pair production in the dilepton channel in $pp$ collisions at $\sqrt{s}=13$ TeV
• Bottom-Quark Forward-Backward and Charge Asymmetries at Hadron Colliders
• Beauty-quark and charm-quark pair production asymmetries at LHCb
• The leptonic $W^{\pm }$ boson asymmetry in association with jets at LHCb, and PDF constraints at large-$x$
• Asymmetric heavy-quark hadroproduction at LHCb: Predictions and applications
• Measurement of the top-quark production cross-section and charge asymmetry at LHCb