Chiral Multiplets of Heavy-Light Mesons

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dc.creatorBardeen, William A.
dc.creatorEichten, Estia J.
dc.creatorHill, Christopher T.
dc.date2003-05-05
dc.date2003-05-09
dc.date.accessioned2026-07-07T10:28:48Z
dc.date.available2026-07-07T10:28:48Z
dc.descriptionThe recent discovery of a narrow resonance in D_s+pi^0 by the BABAR collaboration is consistent with the interpretation of a heavy J^P(0+,1+) spin multiplet. This system is the parity partner of the groundstate (0-,1-) multiplet, which we argue is required in the implementation of SU(3)_L x SU(3)_R chiral symmetry in heavy-light meson systems. The (0+,1+)->(0-,1-)+pi transition couplings satisfy a Goldberger-Treiman relation, g_pi = Delta(M)/f_pi, where Delta(M) is the mass gap. The BABAR resonance fits the 0+ state, with a kinematically blocked principal decay mode to D+K. The allowed D_s+pi, D_s+2pi and electromagnetic transitions are computed from the full chiral theory and found to be suppressed, consistent with the narrowness of the state. This state establishes the chiral mass difference for all such heavy-quark chiral multiplets, and precise predictions exist for the analogous B_s and strange doubly-heavy baryon states.
dc.description10 pages; minor editorial revisions; recomputed M1 transition
dc.identifierhttps://arxiv.org/abs/hep-ph/0305049
dc.identifierhttp://arxiv.org/abs/hep-ph/0305049
dc.identifierPhys.Rev.D68:054024,2003
dc.identifierdoi:10.1103/PhysRevD.68.054024
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177575
dc.subjectHigh Energy Physics - Phenomenology
dc.titleChiral Multiplets of Heavy-Light Mesons
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