Effects of subleading operators in the heavy quark effective theory

Luke, Michael

doi:10.1016/0370-2693(90)90568-q

Cited by 496 publications

(498 citation statements)

References 10 publications

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“…In the following section we describe the one loop calculation and present our results as corrections to hadronic form factors. We verify in section 4 that these results are consistent with Luke's theorem [4], then discuss physical implications in section 5. We find surprisingly large symmetry violations for a particular ratio of form factors, casting doubt on the convergence of the heavy quark-chiral expansion for these processes.…”

Section: Introductionsupporting

confidence: 56%

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SU(3) corrections to B → Dl form factors at O()

Boyd

Grinstein

1995

Nuclear Physics B

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We compute the O( 1 M , m s ) heavy quark and SU(3) corrections to B s → D s eν form factors. In the limit of vanishing light quark mass, B s → D s eν form factors are given in terms of the the B → Deν form factors, the leading order chiral parameter g, and two O( 1 M ) chiral parameters g 1 and g 2 . All the chiral parameters can be extracted, in principle, from other heavy meson decays. Analytic counterterms proportional to the strange quark mass are presented for completeness, but no predictive power remains when they are included. Anomalously large loop corrections warn of poor convergence of the heavy quark chiral symmetry expansion for these processes. This suggests that naive extrapolations of B → D form factors relying on heavy quark and chiral symmetries, as often used in monte carlo simulations of lattice QCD, may incur large errors.

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Section: Introductionsupporting

confidence: 56%

“…The simplest way to find these relations is to match onto the heavy quark effective theory [7], giving [4],…”

Section: Lagrangian and Currentmentioning

confidence: 99%

SU(3) corrections to B → Dl form factors at O()

Boyd

Grinstein

1995

Nuclear Physics B

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“…The vanishing of the 1/N c corrections to the axial couplings is similar to the AdemolloGatto theorem [5], and to the vanishing of 1/m Q corrections in the heavy quark theory at zero recoil [6]. There are two sources of 1/N c corrections, 1/N c corrections to the states, and 1/N c corrections to the axial current operator.…”

supporting

confidence: 52%

corrections to the baryon axial currents in QCD

1993

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“…We stress once again that we have chosen to work at the leading order in 1/M Q , which is why we have not introduced the non leading form factors discussed e.g. in [27] [28].…”

Section: Numerical Resultsmentioning

confidence: 99%

Two body non-leptonic decays of B and Bs mesons

et al. 1993

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We perform an analysis of two-body non-leptonic decays of B and Bs mesons in the factorization approximation. We make use of the semileptonic decay amplitudes previously calculated on the basis of an effective lagrangian satisfying chiral and heavy quark symmetries and including spin 1 resonances. Exclusive semileptonic D-decay data are used as experimental input. Our results compare favorably with data, whenever they are available, and indicate a positive value for the ratio of non-leptonic coefficients a2a1, similarly to previous studies

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Effects of subleading operators in the heavy quark effective theory

Cited by 496 publications

References 10 publications

SU(3) corrections to B → Dl form factors at O()

SU(3) corrections to B → Dl form factors at O()

corrections to the baryon axial currents in QCD

Two body non-leptonic decays of B and Bs mesons

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