Union of chiral and heavy quark symmetries
Gustavo Burdman,John F. Donoghue +1 more
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TLDR
In this paper, the chiral symmetric couplings of pions to heavy mesons (B or D) are described in the portion of phase space where the pions have low momentum.About:
This article is published in Physics Letters B.The article was published on 1992-04-30 and is currently open access. It has received 410 citations till now. The article focuses on the topics: Pion & Meson.read more
Citations
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The hidden-charm pentaquark and tetraquark states
TL;DR: Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model as discussed by the authors, and investigated various theoretical interpretations of these candidates of the multiquark states.
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Hadronic molecules
TL;DR: In this article, the authors review experimental evidences of various candidates of hadronic molecules, and methods of identifying such structures Nonrelativistic effective field theories are the suitable framework for studying hadronic molecule, and are discussed in both the continuum and finite volumes.
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Heavy quark symmetry
TL;DR: In this article, the authors review the current status of heavy-quark symmetry and its applications to weak decays of hadrons containing a single heavy quark, including a comprehensive treatment of symmetry breaking corrections.
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Effective field theories for heavy quarkonium
TL;DR: In this paper, a coherent field-theory-derived quantum-mechanical scheme was proposed to calculate the properties of bound states made by two or more heavy quarks.
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Phenomenology of heavy meson chiral lagrangians
Roberto Casalbuoni,Aldo Deandrea,N. Di Bartolomeo,Raoul Gatto,Ferruccio Feruglio,Giuseppe Nardulli +5 more
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.
References
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Chiral perturbation theory to one loop
J. Gasser,Heinrich Leutwyler +1 more
TL;DR: In this article, the low energy representation of several Green's functions and form factors and of the na scattering amplitude are calculated in terms of a few constants, which may be identified with the coupling constants of a unique effective low energy Lagrangian.
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Chiral Perturbation Theory: Expansions in the Mass of the Strange Quark
Jürg Gasser,Heinrich Leutwyler +1 more
TL;DR: In this paper, the authors construct the generating functional of U(3)×U(3), which allows them to calculate the Green functions up to and including terms of order p4 (at fixed radio m quark p 2 ) in terms of a few coupling constants which chiral symmetry leaves undetermined.
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Structure of phenomenological Lagrangians. 1.
TL;DR: In this article, the general structure of phenomenological Lagrangian theories is investigated, and the possible transformation laws of the phenomenological fields under a group are discussed, which is equivalent to finding all (nonlinear) realizations of a (compact, connected, semisimpleasure) Lie group which become linear when restricted to a given subgroup.
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Weak decays of heavy mesons in the static quark approximation
Nathan Isgur,Mark B. Wise +1 more
TL;DR: In this paper, the authors exploit these static quark symmetries to derive model-independent normalizations of some weak hadronic matrix elements involving heavy quarks, as well as many relationships between such matrix elements.
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Structure of phenomenological lagrangians. ii.
TL;DR: In this paper, the general method for constructing invariant phenomenological Lagrangians is described, where the fields are assumed to transform according to (nonlinear) realizations of an internal symmetry group, given in standard form.