Heidelberg 2022 – scientific programme
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T: Fachverband Teilchenphysik
T 31: Beyond the Standard Model (Theory) 1
T 31.3: Talk
Tuesday, March 22, 2022, 16:45–17:00, T-H16
Precision predictions for scalar leptoquark pair production at the LHC — •Christoph Borschensky1, Benjamin Fuks2, Adil Jueid3, Anna Kulesza4, and Daniel Schwartländer4 — 1KIT, Karlsruhe, Germany — 2LPTHE/Sorbonne Université, Paris, France — 3KIAS, Seoul, South Korea — 4WWU Münster, Germany
Leptoquarks are particles that simultaneously carry lepton and baryon number, and appear in many extensions of the Standard Model. The appearance of so-called flavour anomalies has led to increased interest in leptoquark models which are known to mitigate the tensions between theoretical expectations and experimental measurements.
In my talk, I will present precision predictions for the production of scalar leptoquarks at the LHC, evaluated at next-to-leading order in QCD and improved by threshold resummation corrections at next-to-next-to-leading-logarithmic accuracy. Apart from QCD contributions, included are the lepton t-channel exchange diagrams relevant in the light of the recent B-flavour anomalies. The results exhibit an interesting interplay between the different contributions, affected considerably by the choice of parton distribution functions. Additionally, I discuss the impact of NLO-QCD corrections on the so-called off-diagonal production channels, i.e. the production of a pair of different components of a given leptoquark multiplet. These predictions consist of the most precise leptoquark cross section calculations available to date and are necessary for the best exploitation of leptoquark LHC searches.