Heavy meson hyperfine splitting: A Complete 1/m(Q) calculation
TL;DR: In this article, the hyperfine splittings of an effective lagrangian with chiral, heavy flavour and spin symmetries are analyzed in the framework of a complete set of first order terms.
About: This article is published in Physics Letters B.The article was published on 1995-03-23 and is currently open access. It has received 11 citations till now. The article focuses on the topics: QCD sum rules.
Citations
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TL;DR: In this article, an effective chiral lagrangian for heavy and light mesons describing strong interactions among effective meson fields as well as their couplings to electromagnetic and weak currents, including the relevant symmetry-breaking terms is presented.
517 citations
TL;DR: In this paper , an extensive review of the progress on the heavy hadronic molecular states within the framework of the chiral perturbation theory is presented, in which the same chiral dynamics not only govern the nuclei and forms the deuteron, but also dictates the shallow bound states or resonances composed of two heavy hadrons.
26 citations
KEK1
TL;DR: In this paper, the authors discuss the lattice determination of the B-B mixing amplitude and how to put a strong constraint on the poorly known CKM element |Vtd| and other important quantities such as form factors of semi-leptonic decays.
Abstract: Precise knowledge onB meson decay properties plays an essential role in testing the unitarity of the CKM matrix [1,2]. The experimental status relevant to the unitarity test is now promising because experimental uncertainties are already very small or expected to be reduced well in the near future [3]. On the other hand, theoretical calculations relevant to the test are still not sufficiently accurate due to the non-perturbative effect of QCD. Lattice QCD is an ideal tool to deal with this effect and should be able to reduce the current theoretical uncertainties [4]. Apart from the asymmetric ee colliders, there are two important upcoming experiments for the unitarity test. The Tevatron Run II will produce a large number of and variety of b and chadrons, and their basic properties such as mass and lifetime will be precisely measured [5]. What is important for us is that once B s -B 0 s mixing is observed the mass difference ∆MBs will be measured with a few percent accuracy. The width difference in the Bs meson system is also expected to be measured precisely. Another exciting experiment is the CLEO-c project [6]. There, charmed quarkonia, hybrid states and glueballs will be observed. In particular the leptonic and the semileptonic decays of D mesons are expected to be measured with a few percent level. Advancing lattice QCD calculations with a view to combining them with these precise experimental results is an urgent task in front of us. In this review, I will focus on new and updated calculations of hadron matrix elements. The current status and progress made in spectrum calculations and formulations are not covered, although they are very important and interesting. In particular, I will mainly discuss the lattice determination of the B-B mixing amplitude and how to put a strong constraint on the poorly known CKM element |Vtd|. The other important quantities such as form factors of semi-leptonic decays will be mentioned briefly. Recently several suggestions to improve the limits on accuracy of present lattice calculations have been made in methodology. I will briefly introduce some of them before summarizing my point of view on the current status.
19 citations
TL;DR: In this paper, the strong interactions of the negative-parity heavy mesons with ρ meson were described consistently in the context of an effective Lagrangian, which is invariant under isospin SU ( 2 ) transformation.
11 citations
TL;DR: In this paper, the decay constants of the D (D ∗ ) and B (B ∗) mesons using a covariant formulation of chiral perturbati on theory were derived.
7 citations
References
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TL;DR: In this paper, an effective lagrangian including negative and positive parity heavy mesons containing a heavy quark, light pseudoscalars, and light vector resonances, with their allowed interactions, was introduced.
Abstract: We introduce an effective lagrangian including negative and positive parity heavy mesons containing a heavy quark, light pseudoscalars, and light vector resonances, with their allowed interactions, using heavy quark spin-flavour symmetry, chiral symmetry, and the hidden symmetry approach for light vector resonances. On the basis of such a lagrangian, by considering the allowed weak currents and by including the contributions from the nearest unitarity poles we calculate the form factors for semileptonic decays of $B$ and $D$ mesons into light pseudoscalars and light vector resonances. The available data, together with some additional assumptions, allow for a set of predictions in the different semileptonic channels, which can be compared with those following {}from different approaches. A discussion of non-dominant terms in our approach, which attempts at including a rather complete dynamics, will however have to wait till more abundant data become available.
105 citations
TL;DR: The renormalization-group improvement of these low-energy parameters is discussed in detail and the spin-symmetry-violating effects responsible for the vector-pseudoscalar mass difference and for the ratio of the corresponding decay constants, {ital f}{sub {ital V}}/{ital f}, sub {ital P}}, are calculated.
Abstract: Spin- and flavor-symmetry-breaking corrections to decay constants of heavy mesons are analyzed in next-to-leading order in the 1/{ital m}{sub {ital Q}} expansion. The general structure of these corrections is derived in an effective-field-theory approach. The subleading universal form factors, which parametrize the matrix elements of higher-dimensional operators in the effective theory, are estimated using QCD sum rules. The renormalization-group improvement of these low-energy parameters is discussed in detail. As an application, the spin-symmetry-violating effects responsible for the vector-pseudoscalar mass difference and for the ratio of the corresponding decay constants, {ital f}{sub {ital V}}/{ital f}{sub {ital P}}, are calculated.
100 citations
TL;DR: In this article, the effects of the heavy hadrons with light octet Goldstone bosons are studied in a framework which represents a synthesis of chiral perturbation theory and the heavy quark effective theory.
81 citations
TL;DR: In this paper, the strong coupling constant gP∗Pπ with pseudoscalar and vector heavy mesons was computed using the QCD sum rules approach, based on the evaluation of the time ordered product of currents between the vacuum and the soft pion state.
59 citations
CERN1
TL;DR: In this paper, the SU(3) and hyperfine mass splittings of mesons containing a single heavy quark are computed to one-loop order in chiral perturbation theory with heavy quarks spin symmetry.
34 citations