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Effective Theories for Quark Flavour Physics

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arxiv 1905.00798 v3 pith:UFQMAD3Q submitted 2019-05-02 hep-ph

Effective Theories for Quark Flavour Physics

classification hep-ph
keywords effectivedeltaquarkflavourphysicsdiscusshamiltonianmodel
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The purpose of these lectures is to provide the reader with an idea of how we can probe New Physics with quark flavour observables using effective theory techniques. After giving a concise review of the quark flavour structure of the Standard Model, we introduce the effective Hamiltonian for quark weak decays. We then consider the effective Hamiltonian for $\Delta F=2$ transitions in the Standard Model and beyond. We discuss how meson-antimeson mixing and CP violation can be described in terms of the $\Delta F=1$ and $\Delta F=2$ effective Hamiltonians. Finally we present the Unitarity Triangle Analysis and discuss how very stringent constraints on New Physics can be obtained from $\Delta F=2$ processes.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. A Dispersive Look at Rare $B$-meson Semileptonic Decays

    hep-ph 2026-07 conditional novelty 6.0

    A global fit of b→s ℓ+ℓ− and b→s νν data finds that hadronic charm-loop effects, not a new short-distance coupling C9, can explain the observed anomalies.

  2. A Dispersive Look at Rare $B$-meson Semileptonic Decays

    hep-ph 2026-07 conditional novelty 5.5

    Lattice-only Dispersive Matrix form factors enlarge large-recoil uncertainties and, with new angular data, favour long-distance hadronic effects over a short-distance C9 New Physics shift.

  3. Lepton sourced baryon asymmetry in the fourth generation model

    hep-ph 2026-01 reject novelty 5.0

    A fourth-generation model is claimed to yield the observed baryon asymmetry η_B ≈ 10^-10, but the derivation sets the matching scale equal to the t' quark mass while also adopting a value about nine times smaller.