Study of the decay $D^0\rightarrow \bar{K}^0\pi^-e^+\nu_e$ - INSPIRE

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Study of the decay $D^0\rightarrow \bar{K}^0\pi^-e^+\nu_e$

BESIII

Collaboration

Nov 27, 2018

9 pages

Published in:

Phys.Rev.D 99 (2019) 1, 011103

Published: Jan 26, 2019

e-Print:

1811.11349 [hep-ex]

DOI:

10.1103/PhysRevD.99.011103

PDG:

{{\mathit D}^{0}}

\rightarrow

{{\overline{\mathit K}}^{0}}{{\mathit \pi}^{-}}{{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}

Experiments:

BEPC-BES-III

View in:

ADS Abstract Service

reference search33 citations

Citations per year

Abstract: (APS)

We report a study of the decay D0→K¯0π-e+νe based on a sample of 2.93 fb-1 e+e- annihilation data collected at the center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider. The total branching fraction is determined to be B(D0→K¯0π-e+νe)=(1.434±0.029(stat.)±0.032(syst.))%, which is the most precise to date. According to a detailed analysis of the involved dynamics, we find this decay is dominated with the K*(892)- contribution and present an improved measurement of its branching fraction to be B(D0→K*(892)-e+νe)=(2.033±0.046(stat.)±0.047(syst.))%. We further access their hadronic form-factor ratios for the first time as rV=V(0)/A1(0)=1.46±0.07(stat.)±0.02(syst.) and r2=A2(0)/A1(0)=0.67±0.06(stat.)±0.01(syst.). In addition, we observe a significant K¯0π- S-wave component accounting for (5.51±0.97(stat.)±0.62(syst.))% of the total decay rate.

Note:

8 pages, 2 figures

electron positron: annihilation
electron positron: colliding beams
D0: semileptonic decay
form factor: hadronic
form factor: ratio
D0: branching ratio: measured
mass spectrum: (anti-K0 pi)
K*(892)-
amplitude analysis
Beijing Stor

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