TY - JOUR

T1 - Study of the decay D0 →ρ (770)-e+νe

AU - BESIII Collaboration

AU - Achasov, M. N.

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

PY - 2024/12/30

Y1 - 2024/12/30

N2 - We present a study of the semileptonic decay D0→π-π0e+νe using an e+e- annihilation data sample of 7.93 fb-1 collected at the center-of-mass energy of 3.773 GeV with the BESIII detector. The branching fraction of D0→ρ(770)-e+νe is measured to be (1.439±0.033(stat)±0.027(syst))×10-3, which is a factor 1.6 more precise than previous measurements. By performing an amplitude analysis, we measure the hadronic form-factor ratios of D0→ρ(770)-e+νe at q2=0 assuming the single-pole-dominance parametrization: rV=V(0)/A1(0)=1.548±0.079(stat)±0.041(syst) and r2=A2(0)/A1(0)=0.823±0.056(stat)±0.026(syst).

AB - We present a study of the semileptonic decay D0→π-π0e+νe using an e+e- annihilation data sample of 7.93 fb-1 collected at the center-of-mass energy of 3.773 GeV with the BESIII detector. The branching fraction of D0→ρ(770)-e+νe is measured to be (1.439±0.033(stat)±0.027(syst))×10-3, which is a factor 1.6 more precise than previous measurements. By performing an amplitude analysis, we measure the hadronic form-factor ratios of D0→ρ(770)-e+νe at q2=0 assuming the single-pole-dominance parametrization: rV=V(0)/A1(0)=1.548±0.079(stat)±0.041(syst) and r2=A2(0)/A1(0)=0.823±0.056(stat)±0.026(syst).

UR - https://www.mendeley.com/catalogue/b4b1bd10-aada-37ee-9e63-82bf13acb5cd/

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85213987055&origin=inward&txGid=f16022137b5003e54b91e9606a67f39f

U2 - 10.1103/PhysRevD.110.112018

DO - 10.1103/PhysRevD.110.112018

M3 - Article

VL - 110

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 11

M1 - 112018

ER -