TY  - JOUR
AU  - Du, Meng-Lin
AU  - Guo, Feng-Kun
AU  - Hanhart, Christoph
AU  - Kubis, Bastian
AU  - Meißner, Ulf-G.
TI  - Where Is the Lightest Charmed Scalar Meson?
JO  - Physical review letters
VL  - 126
IS  - 19
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2021-02197
SP  - 192001
PY  - 2021
AB  - 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)
LB  - PUB:(DE-HGF)16
C6  - 34047611
UR  - <Go to ISI:>//WOS:000652838800002
DO  - DOI:10.1103/PhysRevLett.126.192001
UR  - https://juser.fz-juelich.de/record/892608
ER  -