TY - JOUR

T1 - Observation of D→a0(980)π in the decays D0→π+π−η and D+→π+π0η

AU - BESIII Collaboration

AU - Achasov, M. n.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

PY - 2024/12/26

Y1 - 2024/12/26

N2 - We report the first amplitude analyses of the decays D0→π+π-η and D+→π+π0η using a data sample taken with the BESIII detector at the center-of-mass energy of 3773 MeV, corresponding to an integrated luminosity of 7.9 fb-1. The contribution from the process D0(+)→a0(980)+π-(0) is significantly larger than the D0(+)→a0(980)-(0)π+ contribution. The ratios B(D0→a0(980)+π-)/B(D0→a0(980)-π+) and B(D+→a0(980)+π0)/B(D+→a0(980)0π+) are measured to be 7.5-0.8stat+2.5±1.7syst and 2.6±0.6stat±0.3syst, respectively. The measured D0 ratio disagrees with the theoretical predictions by orders of magnitudes, thus implying a substantial contribution from final-state interactions.

AB - We report the first amplitude analyses of the decays D0→π+π-η and D+→π+π0η using a data sample taken with the BESIII detector at the center-of-mass energy of 3773 MeV, corresponding to an integrated luminosity of 7.9 fb-1. The contribution from the process D0(+)→a0(980)+π-(0) is significantly larger than the D0(+)→a0(980)-(0)π+ contribution. The ratios B(D0→a0(980)+π-)/B(D0→a0(980)-π+) and B(D+→a0(980)+π0)/B(D+→a0(980)0π+) are measured to be 7.5-0.8stat+2.5±1.7syst and 2.6±0.6stat±0.3syst, respectively. The measured D0 ratio disagrees with the theoretical predictions by orders of magnitudes, thus implying a substantial contribution from final-state interactions.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85214566509&origin=inward&txGid=cd183fb1615a257323223830a85cad21

U2 - 10.1103/PhysRevD.110.L111102

DO - 10.1103/PhysRevD.110.L111102

M3 - Article

VL - 110

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 11

M1 - L111102

ER -