2004/11/10 by Stéphan Narison, Stephan Narison, Narison, Stephan
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-lat #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0411145
Talk presented at the 11th High-Energy Physics International Conference in Quantum Chromodynamics QCD 04 (5-9th July 2004-Montpellier-France) and partly presented at the 2nd High-Energy Physics International Conference HEP-MAD 04 (27th Sept.- 2nd Oct. 2004-Antananarivo-Madagascar). To appear in the QCD 04 Proceedings - Nucl. Phys. B (Proc. Suppl.) and in the SLAC Econf. on-line Proceedings. Reference and comment added
openalex publication_date 2004/11/10 · arxiv created 2004/12/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This talk summarizes the study of the dynamics of the heavy-light Qq open charm and beauty mesons obtained in [1] using QCD spectral sum rules (QSSR) and motivated by the recent experimental discovery of the DsJ(2317) and DsJ(2457) mesons. The important rôle of the chiral condensate in the mass-splittings between the scalar-pseudoscalar mesons is emphasized. The emerging value of the running charm quark mass for reproducing the well-known D(0-) and Ds(0-) masses is: mc(mc)=1.13+0.08-0.04 GeV, which confirms previous estimates from this channel [2]. Using this value, the sum rules give: MDs(0+)= (2297+- 113) MeV, and a small SU(3) breaking: MDs(0+)-MD(0+)= 25 MeV. Extending the analysis to the B-system, we find MB(0+)- MB(0-)= (422+- 196) MeV = MDs(0+)-MDs(0-). Assuming an approximate (heavy and light) flavour and spin symmetries of the mass-splittings as indicated by the previous results, one also deduces MD*s(1+)= (2440+- 113) MeV. Finally, one also gets: fD(0+)= (217+- 25) MeV much bigger than fπ=130.6 MeV, suggesting a large violation of the 1/sqrtMD scaling, while the size of the SU(3) breaking ratio fDs(0+)/fD(0+)= 0.93+- 0.02 is opposite to the one of the 0- channel of about 1.14.