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Effective theory approach to unstable particle production

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arxiv hep-ph/0312331 v1 pith:5EM7AVUR submitted 2003-12-23 hep-ph

classification hep-ph
keywords effectivegammaparticletheoryunstableabelianallowsalpha
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

Using the hierarchy of scales between the mass, $M$, and the width, $\Gamma$, of a heavy, unstable particle we construct an effective theory that allows calculations for resonant processes to be systematically expanded in powers of the coupling $\alpha$ and $\Gamma/M$. We illustrate the method by computing the next-to-leading order line shape of a scalar resonance in an abelian gauge-Yukawa model.

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Cited by 3 Pith papers

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

  1. Towards NNLO QCD predictions for off-shell top-quark pair production and decays

    hep-ph 2025-07 conditional novelty 8.0 of 10

    The first NNLO QCD prediction for off-shell W+W-bbbar production with massive bottom quarks at the LHC, using a double-pole approximation for the two-loop virtual and an on-shell matching for non-factorisable corrections.

  2. Self-Interaction of Super-Resonant Dark Matter

    hep-ph 2025-11 unverdicted novelty 6.0 of 10

    Super-resonant dark matter at O(100) GeV masses amplifies self-scattering and annihilation cross sections via combined resonance and Sommerfeld effects, necessitating coupled Boltzmann equations to match observed reli...

  3. Finite width effects in nonleptonic D-decays

    hep-ph 2024-12 conditional novelty 6.0 of 10

    Including final-state meson widths in the phase space of nonleptonic D decays changes some flavor-SU(3) branching-ratio predictions, most notably boosting D0 to K*0 eta' far above the experimental upper limit.

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