Hadronic production of squark-squark pairs: The electroweak contributions

Details Hadronic production of squark-squark pairs: The electroweak contributions Hadronic production of squark-squark pairs: The electroweak contributions

2010-04-15

arxiv.org/abs/1004.2621v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

36 pages, 18 figures

Scientific paper

We compute the electroweak (EW) contributions to squark--squark pair production processes at the LHC within the framework of the Minimal Supersymmetric Standard Model (MSSM). Both tree-level EW contributions, of O(alpha_s alpha + alpha^2), and next-to-leading order (NLO) EW corrections, of O(alpha_s^2 alpha), are calculated. Depending on the flavor and chirality of the produced quarks, many interferences between EW-mediated and QCD-mediated diagrams give non-zero contributions at tree-level and NLO. We discuss the computational techniques and present an extensive numerical analysis for inclusive squark--squark production as well as for subsets and single processes. While the tree-level EW contributions to the integrated cross sections can reach the 20% level, the NLO EW corrections typically lower the LO prediction by a few percent.

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