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High-pT dilepton tails and flavor physics

Greljo, Admir ; Marzocca, David

The European physical journal. C, Particles and fields, 2017-08, Vol.77 (8) [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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  • Título:
    High-pT dilepton tails and flavor physics
  • Autor: Greljo, Admir ; Marzocca, David
  • Assuntos: Astronomy ; Astrophysics and Cosmology ; Elementary Particles ; Hadrons ; Heavy Ions ; Measurement Science and Instrumentation ; Nuclear Energy ; Nuclear Physics ; Physics ; Physics and Astronomy ; Quantum Field Theories ; Quantum Field Theory ; Regular Article - Theoretical Physics ; String Theory
  • É parte de: The European physical journal. C, Particles and fields, 2017-08, Vol.77 (8)
  • Descrição: We investigate the impact of flavor-conserving, non-universal quark-lepton contact interactions on the dilepton invariant mass distribution in p p → ℓ + ℓ - processes at the LHC. After recasting the recent ATLAS search performed at 13 TeV with 36.1 fb - 1 of data, we derive the best up-to-date limits on the full set of 36 chirality-conserving four-fermion operators contributing to the processes and estimate the sensitivity achievable at the HL-LHC. We discuss how these high- p T measurements can provide complementary information to the low- p T rare meson decays. In particular, we find that the recent hints on lepton-flavor universality violation in b → s μ + μ - transitions are already in mild tension with the dimuon spectrum at high- p T if the flavor structure follows minimal flavor violation. Even if the mass scale of new physics is well beyond the kinematical reach for on-shell production, the signal in the high- p T dilepton tail might still be observed, a fact that has been often overlooked in the present literature. In scenarios where new physics couples predominantly to third generation quarks, instead, the HL-LHC phase is necessary in order to provide valuable information.
  • Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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