%0 Journal Article
%A Du, Meng-Lin
%A Guo, Feng-Kun
%A Hanhart, Christoph
%A Kubis, Bastian
%A Meißner, Ulf-G.
%T Where Is the Lightest Charmed Scalar Meson?
%J Physical review letters
%V 126
%N 19
%@ 1079-7114
%C College Park, Md.
%I APS
%M FZJ-2021-02197
%P 192001
%D 2021
%X The lightest charmed scalar meson is known as the D∗0(2300), which is one of the earliest new hadron resonances observed at modern B factories. We show here that the parameters assigned to the lightest scalar D meson are in conflict with the precise LHCb data of the decay B−→D+π−π−. On the contrary, these data can be well described by an unitarized chiral amplitude containing a much lighter charmed scalar meson, the D∗0(2100). We also extract the low-energy S-wave Dπ phase of the decay B−→D+π−π− from the data in a model-independent way, and show that its difference from the Dπ scattering phase shift can be traced back to an intermediate ρ− exchange. Our work highlights that an analysis of data consistent with chiral symmetry, unitarity, and analyticity is mandatory in order to extract the properties of the ground-state scalar mesons in the singly heavy sector correctly, in analogy to the light scalar mesons f0(500) and K∗0(700)
%F PUB:(DE-HGF)16
%9 Journal Article
%$ 34047611
%U <Go to ISI:>//WOS:000652838800002
%R 10.1103/PhysRevLett.126.192001
%U https://juser.fz-juelich.de/record/892608