Width difference in the Bs0-Bs0 system from lattice HQET

Gimenez, V. Castillo; Reyes, J.

doi:10.1016/s0920-5632(00)01068-9

Cited by 9 publications

(9 citation statements)

References 14 publications

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“…Besides several 'minor' (albeit important) improvements, we combined the static HQET results of ref. [11] with those of ref. [13], where lattice QCD is employed for three mesons of masses, 1.8 GeV m P 2.4 GeV.…”

Section: Width Difference Of the B 0 S -Systemsupporting

confidence: 56%

Theoretical progress in describing the B-meson lifetimes

Bečirević¹

2001

Proceedings of International Europhysics Conference on High Energy Physics — PoS(hep2001)

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The present status of the theoretical estimates of the difference between the widths of the neutral B s -mesons and of the B-meson lifetime ratios is reviewed. In particular, the lattice results for the matrix elements of the relevant ∆B = 2 operators are updated and the first lattice QCD results for the matrix elements of ∆B = 0 operators are presented. In both cases, the NLO perturbative QCD corrections in the coefficient functions have been included. The theoretically updated results are: (∆Γ/Γ) Bs = 7±4 %, τ (B + )/τ (B d ) = 1.07(3) and τ (B s )/τ (B d ) = 1.00(2). * SV (Shifman-Voloshin limit) is the limit in which ΛQCD ≪ m b − 2mc ≪ m b [5]. † For recent reviews on the computation of (∆Γ/Γ)B s , see also refs. [6,7].

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Section: Width Difference Of the B 0 S -Systemsupporting

confidence: 56%

Theoretical progress in describing the B-meson lifetimes

Bečirević¹

2001

Proceedings of International Europhysics Conference on High Energy Physics — PoS(hep2001)

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“…The computation of the first two operators has been explained in detail in refs. [6,20]. The data-set consists of 600 configurations gathered on the 24 3 × 40 lattice at β = 6.0.…”

Section: Computation In the Static Limit Of Hqetmentioning

confidence: 99%

B-parameters of the complete set of matrix elements of (ΔB = 2) operators from the lattice

Bečirević

Gimenez

Martinelli

et al. 2002

J. High Energy Phys.

175

209

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We compute on the lattice the "bag" parameters of the five ∆B = 2 operators of the supersymmetric basis, by combining their values determined in full QCD and in the static limit of HQET. The extrapolation of the QCD results from the accessible heavy-light meson masses to the B-meson mass is constrained by the static result. The matching of the corresponding results in HQET and in QCD is for the first time made at NLO accuracy in the MS(NDR) renormalization scheme. All results are obtained in the quenched approximation.

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“…Using the values from recent lattice calculations [107,112] (46) and (47), are compatible and progress is needed to reduce uncertainties related to the scale dependence of perturbative QCD and to 1/m b corrections before these theoretical evaluations can be used to set a limit on ∆m s .…”

Section: Combination Methods For ∆M Dmentioning

confidence: 99%

“…The uncertainty on the variation with w of the B 0 d → D * * + ℓ − ν ℓ form factors is taken to be fully correlated between experiments. Published results are using theoretically predicted values for the form factor ratios R 1 (w) and R 2 (w) defined in Equation (112). In the present analysis, experimental results on these quantities, obtained by CLEO [150] have been used and a corresponding systematic uncertainty has been derived.…”

Section: Corrections Applied To the Measurementsmentioning

confidence: 99%