Automated third generation squark production to next-to-leading order

Gonçalves, Dorival;Plehn, Tilman;Mawatari, Kentarou;Lopez Val, David
(2014) Physical Review. D, Particles, Fields, Gravitation and Cosmology — Vol. 90, n° 7 (2014)

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Authors
  • Gonçalves, DorivalDepartment of Physics, Institute for Particle Physics Phenomenology, Durham University, DH1 3LE Durham, United Kingdom
    Author
  • Plehn, TilmanInstitut für Theoretische Physik, Universität Heidelberg, D-69120 Heidelberg, Germany
    Author
  • Mawatari, KentarouTheoretische Natuurkunde and IIHE/ELEM, Vrije Universiteit Brussel, Belgium and International Solvay Institutes, B-1050 Brussels, Belgium
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  • Lopez Val, DavidUCLouvain
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Abstract
If light-flavor squarks and gluinos are indeed heavy and chargino pair production is plagued with overwhelming backgrounds, pair production and associated production of stops and charginos will become the key signatures in the upcoming LHC runs. We present fully automated next-to-leading order predictions for heavy flavor squark production at the LHC, including stop-chargino associated production, based on MadGolem. We compute the total and differential next-to-leading order rates for a variety of minimal supersymmetric standard model scenarios with a light third generation. We focus on theoretical uncertainties on differential rates, including a comparison to multijet merging and the impact of bottom parton densities for stop-chargino associated production. We find that for the associated production channel the rates can reach tens of femtobarns, but the scale dependence does not provide a conservative estimate of the theoretical uncertainties.
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Gonçalves, D., Plehn, T., Mawatari, K., & Lopez Val, D. (2014). Automated third generation squark production to next-to-leading order. Physical Review. D, Particles, Fields, Gravitation and Cosmology, 90(7). https://doi.org/10.1103/PhysRevD.90.075007 (Original work published 2014)