Scalars in the hadron world: the Higgs sector of the strong interaction
نویسنده
چکیده
Scalar mesons are a key expression of the strong physics regime of QCD and the role condensates, particularly 〈qq〉, play in breaking chiral symmetry. What new insights have been provided by recent experiments on D, Ds and J/ψ decays to light hadrons is discussed. We need to establish whether all the claimed scalars σ, κ, f0(1370), etc., really exist and with what parameters before we can meaningfully speculate further about which is transiently qq, qqqq, multi-meson molecule or largely glue. Invited talk at the International Conference on QCD and Hadronic Physics, Beijing, June 2005.
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