Threshold Resummation Effects in the Associated Production of Chargino and Neutralino at Hadron Colliders

Abstract

We investigate the QCD effects in the associated production of the chargino and the neutralino, ${\tilde{\chi }}_1^{\pm }$ and ${\tilde{\chi }}_2^0$, in the Minimal Supersymmetric Standard Model (MSSM) at both the Fermilab Tevatron and the CERN Large Hadron Collider (LHC). We include the next-to-leading order (NLO) QCD corrections (including supersymmetric QCD) and the threshold resummation effects. Our results show that, compared to the NLO predictions, the threshold resummation effects can increase the total cross sections by 3.6% and 3.9% for the associated production of ${\tilde{\chi }}_1^{+}{\tilde{\chi }}_2^0$ and ${\tilde{\chi }}_1^{-}{\tilde{\chi }}_2^0$ at the LHC, respectively, and by 4.7% for those of ${\tilde{\chi }}_1^{\pm }{\tilde{\chi }}_2^0$ at the Tevatron. In the invariant mass distributions the resummation effects are significant for large invariant mass. The threshold resummation reduces the dependence of the total cross sections at the LHC (Tevatron) on the renormalization/factorization scales to 5% (4%) from up to 7% (11%) at NLO.

arXiv commentrevised version with midifications, several references added

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Cited by in corpus (11)

• Supersymmetry production cross sections in pp collisions at sqrt{s} = 7 TeV
• Threshold resummation for gaugino pair production at hadron colliders
• Slepton pair production at the LHC in NLO+NLL with resummation-improved parton densities
• Joint Resummation for Gaugino Pair Production at Hadron Colliders
• Neutralino/chargino pair production at NLO+NLL with resummation-improved PDFs for LHC Run II
• Transverse-momentum resummation for gaugino-pair production at hadron colliders
• Probing $R$-parity violation in $B$-meson decays to a baryon and a light neutralino
• Electroweakino pair production at the LHC: NLO SUSY-QCD corrections and parton-shower effects
• Higgsino and gaugino pair production at the LHC with aNNLO+NNLL precision
• Implications of different supersymmetry breaking patterns for the spectrum and decay of neutralinos and charginos
• Precise predictions for electroweakino-pair production in association with a jet at the LHC