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15 papers
Lifetime difference in B_s mixing: Standard Model and beyond
Andriy Badin, Fabrizio Gabbiani, Alexey A. Petrov
We present a calculation of corrections to the lifetime differences of mesons in the heavy-quark expansion. We find that they are small to significantly affect …
Lifetime Difference in B_s mixing: Standard Model and beyond
Andriy Badin, Fabrizio Gabbiani, Alexey A. Petrov
We present a calculation of 1/m^2_b corrections to the lifetime differences of B_s mesons ΔΓ_s in the heavy-quark expansion. We find that they are small to significantly affect ΔΓ_…
Heavy Meson Molecules in Effective Field Theory
Mohammad T. AlFiky, Fabrizio Gabbiani, Alexey A. Petrov
We consider the implications from the possibility that the recently observed state X(3872) is a meson-antimeson molecule. We write an effective Lagrangian consistent with the heavy…
Spectator effects and lifetimes of heavy hadrons
Fabrizio Gabbiani, Andrei I. Onishchenko, Alexey A. Petrov
We present a calculation of subleading 1/m_b corrections to spectator effects in the ratios of beauty hadron lifetimes in heavy-quark expansion. We find that these effects are siza…
Lambda_b lifetime puzzle in heavy-quark expansion
Fabrizio Gabbiani, Andrei I. Onishchenko, Alexey A. Petrov
Lifetime differences of heavy hadrons can be consistently computed in heavy-quark expansion. The leading effects appear through spectator interactions at order 1/m_b^3. We compute…
Probing Intrinsic Charm with Semileptonic B Decays
F. Gabbiani, Jianwei Qiu, G. Valencia
We discuss semileptonic B decays of the form B -> J/Psi e nu X as possible probes of intrinsic charm. We calculate the leading order perturbative contribution to the process B- ->…