A unified leptoquark model confronted with lepton non-universality in B-meson decays

The anomalies in the B-meson sector, in particular RK(⁎) and RD(⁎), are often interpreted as hints for physics beyond the Standard Model. To this end, leptoquarks or a heavy Z′ represent the most popular SM extensions which can explain the observations. However, adding these fields by hand is not very satisfactory as it does not address the big questions like a possible embedding into a unified gauge theory. On the other hand, light leptoquarks within a unified framework are challenging due to additional constraints such as lepton flavor violation. The existing accounts typically deal with this issue by providing estimates on the relevant couplings. In this letter we consider a complete model based on the SU(4)C⊗SU(2)L⊗U(1)R gauge symmetry, a subgroup of SO(10), featuring both scalar and vector leptoquarks. We demonstrate that this setup has, in principle, all the potential to accommodate RK(⁎) and RD(⁎) while respecting bounds from other sectors usually checked in this context. However, it turns out that KL→e±μ∓ severely constraints not only the vector but also the scalar leptoquarks and, consequently, also the room for any sizeable deviations of RK(⁎) from 1. We briefly comment on the options for extending the model in order to conform this constraint. Moreover, we present a simple criterion for all-orders proton stability within this class of models

16. Fachtagung: Norddeutsche Tagung fuer Abwasserwirtschaft und Gewaesserschutz Beitraege

The volume contains 20 contributions of the meeting for water management and water protection. Themes were: sustainable rain water treatment, small scale water treatment plants, waste waters in urban areas, ground water remediation in industrial sites, optimization of municipal sewage plants through integrated modelling, membrane bioreactors, sewage sludge treatment, pollution control. (uke)SIGLEAvailable from TIB Hannover: RO 849(45) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report

This report presents a short summary of the activities of the "Standard Model" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 12-30 June, 2023)

Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report

International audienceThis report presents a short summary of the activities of the "Standard Model" working group for the "Physics at TeV Colliders" workshop (Les Houches, France, 12-30 June, 2023)