Gauge-boson production with multiple jets near threshold

Abstract

Signatures of new physics beyond the Standard Model are often characterized by large missing transverse energy ($/E_T$) produced in association with multiple jets. The dominant Standard Model background to such processes comes from gauge-boson production in association with jets. A standard search strategy involves looking for an excess in the $m_{eff}$ distribution, where $m_{eff}=/E_T+{\sum }_J{p}_J^T$ and $p_J^T$ denotes the transverse momentum of the $J$-th jet. The region of large $m_{eff}$ is dominated by jet production near threshold, giving rise to large Sudakov logarithms that can change the magnitude and shape of the $m_{eff}$ distribution. We present an effective theory framework for the resummation of such threshold logarithms. We perform an analysis for exclusive jet production using the N-jettiness global event shape, which allows theoretical control to also be maintained over large logarithms induced by vetoing additional jets. As a first step, we give explicit numerical results with next-to-leading-log (NLL) resummation for $pp\to \gamma +2$ jets in the large $m_{eff}$ region.

27 pages, 6 figures

References in corpus (10)

• Search for squarks and gluinos using final states with jets and missing transverse momentum with the ATLAS detector in sqrt(s) = 7 TeV proton-proton collisions
• Precise Predictions for W + 4 Jet Production at the Large Hadron Collider
• Dynamical Threshold Enhancement and Resummation in Drell-Yan Production
• Toward a NNLO calculation of the B-->X_s+gamma decay rate with a cut on photon energy: II. Two-loop result for the jet function
• The gluon jet function at two-loop order
• Precise Predictions for Z + 4 Jets at Hadron Colliders
• The Soft Function for Exclusive N-Jet Production at Hadron Colliders
• Resummation of Large Endpoint Corrections to Color-Octet J/psi Photoproduction
• Azimuthal decorrelations between QCD jets at all orders
• Resummed Cross Section for Jet Production at Hadron Colliders

Cited by in corpus (6)

• Combining Higher-Order Resummation with Multiple NLO Calculations and Parton Showers in GENEVA
• Resummation of jet-veto logarithms in hadronic processes containing jets
• The 1-Jettiness DIS event shape: NNLL + NLO results
• Probing nuclear dynamics in jet production with a global event shape
• Missing Energy and Jets for Supersymmetry Searches
• The 1-Jettiness event shape for DIS with NNLL resummation