Chiral multiplets of heavy - light mesons

By W. Bardeen, E. Eichten, C. Hill. 2003

302 citations recorded by the source corpus.

The recent discovery of a narrow resonance in ${D}_{s}{\ensuremath{\pi}}^{0}$ 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 ground state ${(0}^{\ensuremath{-}}{,1}^{\ensuremath{-}})$ multiplet, which we argue is required in the implementation of ${\mathrm{SU}(3)}_{L}\ifmmode\times\else\texttimes\fi{}{\mathrm{SU}(3)}_{R}$ chiral symmetry in heavy-light meson systems. The ${(0}^{+}{,1}^{+})\ensuremath{\rightarrow}{(0}^{\ensuremath{-}}{,1}^{\ensuremath{-}})+\ensuremath{\pi}$ transition couplings satisfy a Goldberger-Treiman relation, ${g}_{\ensuremath{\pi}}=\ensuremath{\Delta}{M/f}_{\ensuremath{\pi}},$ where $\ensuremath{\Delta}M$ is the mass gap. The BaBar resonance fits the ${0}^{+}$ state, with a kinematically blocked principal decay mode to $D+K.$ The allowed ${D}_{s}+\ensuremath{\pi},$ ${D}_{s}+2\ensuremath{\pi},$ 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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2c92ccc650971ea54d9b8c8ed3c67c08546fc575

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In Nuclear and High Energy Physics

Citations in the corpus

Multiquark States (2017, background): “Bottom analogues of D∗ s0(2317) and Ds1(2460): These BsJ states are the yet-to-be-discovered b-quark analogues of the very narrow DsJ states seen by BaBar, CLEO and Belle [58, 59, 60, 61] Ds0(2317) with J P = 0 and m[Ds1(2460)] with J P = 1, conjectured to be the chiral partners of Ds, J P = 0− and ”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “A good channel to search for both of them is B∗ sγ [503, 526].”
Herwig++ physics and manual (2008, unknown): “[102] and Ref.”
Glueballs, Hybrids, Multiquarks. Experimental facts versus QCD inspired concepts (2007, background): “[869] interpreted the two new resonances Ds0(2317) and Ds1(2460) as cs̄ (0+, 1+) spin parity partners of the (0−, 1−) doublet, and demonstrated that symmetry relation between their partial decay widths derived from chiral symmetry are fulfilled.”