期刊
PHYSICAL REVIEW D
卷 98, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.98.094018
关键词
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资金
- National Natural Science Foundation of China (NSFC) [11621131001]
- Deutsche Forschungsgemeinschaft (DFG) [TRR110]
- NSFC [11747601]
- Thousand Talents Plan for Young Professionals
- CAS Key Research Program of Frontier Sciences [QYZDB-SSW-SYS013]
- CAS Key Research Program [XDPB09]
- CAS President's International Fellowship Initiative (PIFI) [2018DM0034]
- CAS Center for Excellence in Particle Physics (CCEPP)
- Spanish Ministerio de Economa y Competitividad
- European Regional Development Fund [FIS2014-51948-C2-1-P, FPA2016-77313-P, FIS2017-84038-C2-1-P, SEV-2014-0398]
- Generalitat Valenciana [PROMETEOII/2014/0068]
- Ayudas para contratos predoctorales para la formacin de doctores program from the Spanish MINECO [BES-2015-072049]
- ESF
Since 2003 many new hadrons, including the lowest-lying positive-parity charm-strange mesons D*(s0) (2317) and D-s1 (2460), have been observed that do not conform with quark-model expectations. It was recently demonstrated that various puzzles in the charm-meson spectrum find a natural resolution if the SU(3) multiplets for the lightest scalar and axial-vector states, among them the D*(s0) (2317) and the D-s1 (2460), owe their existence to the nonperturbative dynamics of Goldstone-boson scattering off D-(s) and D*((s)) mesons. Most importantly the ordering of the lightest strange and nonstrange scalars becomes natural. We demonstrate for the first time that this mechanism is strongly supported by the recent high quality data on the B- -> D+ pi(-)pi(-) provided by the LHCb experiment. This implies that the lowest quark-model positive-parity charm mesons, together with their bottom counterparts, if realized in nature, do not form the ground-state multiplet. This is similar to the pattern that has been established for the scalar mesons made from light up, down, and strange quarks, where the lowest multiplet is considered to be made of states not described by the quark model. In a broader view, the hadron spectrum must be viewed as more than a collection of quark-model states.
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