L = 1 mesons and the four-quark condensate in QCD sum rules

Govaerts, Jan; Reinders, L. J.; Viron, Françoise de; Weyers, J.

doi:10.1016/0550-3213(87)90294-x

Cited by 43 publications

(68 citation statements)

References 15 publications

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“…[20]. Note that phenomenological studies [112,113] and instanton liquid models [106] suggest strong deviations from the factorized results in some cases.…”

Section: Calculating Wilson Coefficientsmentioning

confidence: 99%

QCD sum rules and applications to nuclear physics

Cohen

Furnstahl

Griegel

et al. 1995

Progress in Particle and Nuclear Physics

174

299

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Applications of QCD sum-rule methods to the physics of nuclei are reviewed, with an emphasis on calculations of baryon self-energies in infinite nuclear matter. The sum-rule approach relates spectral properties of hadrons propagating in the finite-density medium, such as optical potentials for quasinucleons, to matrix elements of QCD composite operators (condensates). The vacuum formalism for QCD sum rules is generalized to finite density, and the strategy and implementation of the approach is discussed. Predictions for baryon self-energies are compared to those suggested by relativistic nuclear physics phenomenology. Sum rules for vector mesons in dense nuclear matter are also considered.

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“…[20]. Note that phenomenological studies [112,113] and instanton liquid models [106] suggest strong deviations from the factorized results in some cases.…”

Section: Calculating Wilson Coefficientsmentioning

confidence: 99%

QCD sum rules and applications to nuclear physics

Cohen

Furnstahl

Griegel

et al. 1995

Progress in Particle and Nuclear Physics

174

299

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“…(A2) to improve the convergence of the OPE series and suppress the contributions from higher resonances. Consequently, the sum rule with OPE series up to dimension 6 and O(α s ) corrections reads [53] …”

Section: Appendix A: Determination Of the Scalar Coupling Of Fmentioning

confidence: 99%

B→f0(980)Kdecays and subleading corrections

Cheng

Yang

2005

Phys. Rev. D

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The decay B → f 0 (980)K is studied within the framework of QCD factorization and the twoquark scenario for f 0 (980). There are two distinct penguin contributions and their interference depends on the unknown mixing angle θ of strange and nonstrange quark contents of f 0 (980): destructive for 0 < θ < π/2 and constructive for π/2 < θ < π. The QCD sum rule method is applied to evaluate the leading-twist light-cone distribution amplitudes and the scalar decay constant of f 0 . We conclude that the short-distance approach is not adequate to explain the observed large rates of f 0 K − and f 0 K 0 . Among many possible subleading corrections, we study and estimate the contributions from the three-parton Fock states of the f 0 and from the intrinsic gluon inside the B meson. It is found that the spectator gluon of the B meson may play an eminent role for the enhancement of f 0 (980)K. We point out that if f 0 (980) is a four-quark state as widely perceived, there will exist extra diagrams contributing to B → f 0 (980)K. However, in practice it is difficult to make quantitative predictions based on the four-quark picture for f 0 (980) as it involves additional nonfactorizable contributions that are difficult to estimate and the calculations of the decay constant and form factors of f 0 (980) are beyond the conventional quark model.

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“…In particular, we focus on h 1 (1380)K * modes, where h 1 (1380) is a 1 1 P 1 meson 2 and its properties are not well-established experimentally [19]. The quark content of h 1 (1380) was suggested asss in the QCD sum rule calculation [20]. Due to the G-parity, the distribution amplitudes of a 1 1 P 1 meson defined by the nonlocal vector and axial-vector current are antisymmetric under the exchange of quark and anti-quark momentum fractions in the SU(3) limit.…”

Section: Introductionmentioning

confidence: 99%

Publisher’s Note: Annihilation in factorization-suppressedBdecays involving a1P11meson and search for new-physics signals [Phys. Rev. D72, 034009 (2005)]

Yang¹

2005

Phys. Rev. D

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The recent measurements of large transverse fractions in B → φK * decays represent a challenge for theory. It was shown that the QCD penguin annihilation could contribute to the transverse amplitudes such that the observation could be accounted for in the Standard Model. However, if one resorts to new physics for resolutions, then the relevant 4-quark operators should be tensor-like or scalar-like. We show that the same annihilation effects could remarkably enhance the longitudinal rates of factorization-suppressed B 0 → h 1 (1380)K * 0 , b 1 (1235)K * 0 modes to be (12.0 +4.1 −3.0 ) × 10 −6 and (7.0 ± 3.5) × 10 −6 , respectively, but attend to be cancelled in the transverse components. Nevertheless, the transverse fractions of B → h 1 (1380)K * can become sizable due to new-physics contributions. The measurements of these decays can thus help us to realize the role of annihilation topologies in charmless B decays and offer a theoretically clean window to search for the evidence of new physics.

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L = 1 mesons and the four-quark condensate in QCD sum rules

Cited by 43 publications

References 15 publications

QCD sum rules and applications to nuclear physics

QCD sum rules and applications to nuclear physics

B→f0(980)Kdecays and subleading corrections

Publisher’s Note: Annihilation in factorization-suppressedBdecays involving a1P11meson and search for new-physics signals [Phys. Rev. D72, 034009 (2005)]

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