Next-to-leading order QCD corrections to the lifetime difference of Bs mesons

M. Beneke; G. Buchalla; C. Greub; A. Lenz; U. Nierste

doi:10.1016/S0370-2693(99)00684-X

Next-to-leading order QCD corrections to the lifetime difference of B_s mesons

M. Beneke, G. Buchalla, C. Greub, A. Lenz, U. Nierste

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243 Scopus citations

Abstract

We compute the QCD corrections to the decay rate difference in the B_s-B̄_s system, ΔΓ_Bs, in the next-to-leading logarithmic approximation using the heavy quark expansion approach. Going beyond leading order in QCD is essential to obtain a proper matching of the Wilson coefficients to the matrix elements of local operators from lattice gauge theory. The lifetime difference is reduced considerably at next-to-leading order. We find (ΔΓ/Γ)_B2 = (f_Bs/210MeV)²[0.006B(m_b) + 0.150B_S(m_b) - 0.063] in terms of the bag parameters B, B_s in the NDR scheme. As a further application of our analysis we also derive the next-to-leading order result for the mixing-induced CP asymmetry in inclusive b → uūd decays, which measures sin2α.

Original language	English
Pages (from-to)	631-640
Number of pages	10
Journal	Physics Letters B
Volume	459
Issue number	4
DOIs	https://doi.org/10.1016/S0370-2693(99)00684-X
State	Published - 1999
Externally published	Yes

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title = "Next-to-leading order QCD corrections to the lifetime difference of Bs mesons",

abstract = "We compute the QCD corrections to the decay rate difference in the Bs-{\=B}s system, ΔΓBs, in the next-to-leading logarithmic approximation using the heavy quark expansion approach. Going beyond leading order in QCD is essential to obtain a proper matching of the Wilson coefficients to the matrix elements of local operators from lattice gauge theory. The lifetime difference is reduced considerably at next-to-leading order. We find (ΔΓ/Γ)B2 = (fBs/210MeV)2[0.006B(mb) + 0.150BS(mb) - 0.063] in terms of the bag parameters B, Bs in the NDR scheme. As a further application of our analysis we also derive the next-to-leading order result for the mixing-induced CP asymmetry in inclusive b → uūd decays, which measures sin2α.",

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T1 - Next-to-leading order QCD corrections to the lifetime difference of Bs mesons

AU - Beneke, M.

AU - Buchalla, G.

AU - Greub, C.

AU - Lenz, A.

AU - Nierste, U.

PY - 1999

Y1 - 1999

N2 - We compute the QCD corrections to the decay rate difference in the Bs-B̄s system, ΔΓBs, in the next-to-leading logarithmic approximation using the heavy quark expansion approach. Going beyond leading order in QCD is essential to obtain a proper matching of the Wilson coefficients to the matrix elements of local operators from lattice gauge theory. The lifetime difference is reduced considerably at next-to-leading order. We find (ΔΓ/Γ)B2 = (fBs/210MeV)2[0.006B(mb) + 0.150BS(mb) - 0.063] in terms of the bag parameters B, Bs in the NDR scheme. As a further application of our analysis we also derive the next-to-leading order result for the mixing-induced CP asymmetry in inclusive b → uūd decays, which measures sin2α.

AB - We compute the QCD corrections to the decay rate difference in the Bs-B̄s system, ΔΓBs, in the next-to-leading logarithmic approximation using the heavy quark expansion approach. Going beyond leading order in QCD is essential to obtain a proper matching of the Wilson coefficients to the matrix elements of local operators from lattice gauge theory. The lifetime difference is reduced considerably at next-to-leading order. We find (ΔΓ/Γ)B2 = (fBs/210MeV)2[0.006B(mb) + 0.150BS(mb) - 0.063] in terms of the bag parameters B, Bs in the NDR scheme. As a further application of our analysis we also derive the next-to-leading order result for the mixing-induced CP asymmetry in inclusive b → uūd decays, which measures sin2α.

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DO - 10.1016/S0370-2693(99)00684-X

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VL - 459

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EP - 640

JO - Physics Letters B

JF - Physics Letters B

IS - 4

ER -

Next-to-leading order QCD corrections to the lifetime difference of B_s mesons

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