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Heavy Quark Expansion for Heavy Hadron Lifetimes: Completing the 1/m_b³ Corrections

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arxiv 2004.09485 v3 pith:CGT3U25E submitted 2020-04-20 hep-ph

Heavy Quark Expansion for Heavy Hadron Lifetimes: Completing the 1/m_b³ Corrections

Thomas Mannel , Daniel Moreno , Alexei Pivovarov This is my paper
classification hep-ph
keywords heavyexpansionquarktermcalculationcoefficientscompletecompleting
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We complete the calculation of the contributions from the dimension six operators in the heavy quark expansion for the total lifetime of heavy hadrons. We give the expressions for the Wilson coefficients of the Darwin term $\rho_D$ and the spin-orbit term $\rho_{\rm LS}$ at tree level.

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Cited by 4 Pith papers

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    Lifetimes of Xi_cc++, Xi_cc+, Omega_cc+ are (2.67 ± 0.94, 0.47 ± 0.08, 1.79 ± 0.62) × 10^{-13} s and for Xi_bb0, Xi_bb-, Omega_bb- are (0.75 ± 0.11, 0.92 ± 0.15, 0.93 ± 0.15) × 10^{-12} s, with W-exchange driving larg...

  3. Revisiting lifetimes of doubly charmed baryons

    hep-ph 2023-05 unverdicted novelty 5.0

    Updated predictions within the heavy quark expansion confirm the lifetime hierarchy τ(Ξ_cc^+) < τ(Ω_cc^+) < τ(Ξ_cc^++) with τ(Ξ_cc^++) = 0.32 ± 0.05 +0.08/-0.07 ps matching LHCb data and provide ratios for the other states.

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    hep-ex 2024-11 accept novelty 2.0

    The Heavy Flavour Averaging Group reports updated world averages for b-hadron, c-hadron, and tau-lepton properties including branching fractions, lifetimes, mixing, CP violation, and CKM elements.