Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Observation of D+ →f0 (500)e+νe and Improved Measurements of D →ρe+νe. / The BESIII Collaboration.
в: Physical Review Letters, Том 122, № 6, 062001, 13.02.2019.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Observation of D+ →f0 (500)e+νe and Improved Measurements of D →ρe+νe
AU - BESIII Collaboration
AU - Ablikim, M.
AU - Achasov, M. N.
AU - Ahmed, S.
AU - Albrecht, M.
AU - Alekseev, M.
AU - Amoroso, A.
AU - An, F. F.
AU - An, Q.
AU - Bai, Y.
AU - Bakina, O.
AU - Baldini Ferroli, R.
AU - Ban, Y.
AU - Begzsuren, K.
AU - Bennett, D. W.
AU - Bennett, J. V.
AU - Berger, N.
AU - Bertani, M.
AU - Bettoni, D.
AU - Bianchi, F.
AU - Boger, E.
AU - Boyko, I.
AU - Briere, R. A.
AU - Cai, H.
AU - Cai, X.
AU - Calcaterra, A.
AU - Cao, G. F.
AU - Cetin, S. A.
AU - Chai, J.
AU - Chang, J. F.
AU - Chang, W. L.
AU - Chelkov, G.
AU - Chen, G.
AU - Chen, H. S.
AU - Chen, J. C.
AU - Chen, M. L.
AU - Chen, P. L.
AU - Chen, S. J.
AU - Chen, X. R.
AU - Chen, Y. B.
AU - Cheng, W.
AU - Chu, X. K.
AU - Cibinetto, G.
AU - Cossio, F.
AU - Dai, H. L.
AU - Dai, J. P.
AU - Dbeyssi, A.
AU - Dedovich, D.
AU - Deng, Z. Y.
AU - Muchnoi, N. Yu
AU - Nikolaev, I. B.
N1 - Publisher Copyright: © 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/" Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP .
PY - 2019/2/13
Y1 - 2019/2/13
N2 - Using a data sample corresponding to an integrated luminosity of 2.93 fb-1 recorded by the BESIII detector at a center-of-mass energy of 3.773 GeV, we present an analysis of the decays D0→π-π0e+νe and D+→π-π+e+νe. By performing a partial wave analysis, the π+π-S-wave contribution to D+→π-π+e+νe is observed to be (25.7±1.6±1.1)% with a statistical significance greater than 10σ, besides the dominant P-wave contribution. This is the first observation of the S-wave contribution. We measure the branching fractions B(D0→ρ-e+νe)=(1.445±0.058±0.039)×10-3, B(D+→ρ0e+νe)=(1.860±0.070±0.061)×10-3, and B(D+→f0(500)e+νe,f0(500)→π+π-)=(6.30±0.43±0.32)×10-4. An upper limit of B(D+→f0(980)e+νe,f0(980)→π+π-)<2.8×10-5 is set at the 90% confidence level. We also obtain the hadronic form factor ratios of D→ρe+νe at q2=0 assuming the single-pole dominance parametrization: rV={[V(0)]/[A1(0)]}=1.695±0.083±0.051, r2={[A2(0)]/[A1(0)]}=0.845±0.056±0.039.
AB - Using a data sample corresponding to an integrated luminosity of 2.93 fb-1 recorded by the BESIII detector at a center-of-mass energy of 3.773 GeV, we present an analysis of the decays D0→π-π0e+νe and D+→π-π+e+νe. By performing a partial wave analysis, the π+π-S-wave contribution to D+→π-π+e+νe is observed to be (25.7±1.6±1.1)% with a statistical significance greater than 10σ, besides the dominant P-wave contribution. This is the first observation of the S-wave contribution. We measure the branching fractions B(D0→ρ-e+νe)=(1.445±0.058±0.039)×10-3, B(D+→ρ0e+νe)=(1.860±0.070±0.061)×10-3, and B(D+→f0(500)e+νe,f0(500)→π+π-)=(6.30±0.43±0.32)×10-4. An upper limit of B(D+→f0(980)e+νe,f0(980)→π+π-)<2.8×10-5 is set at the 90% confidence level. We also obtain the hadronic form factor ratios of D→ρe+νe at q2=0 assuming the single-pole dominance parametrization: rV={[V(0)]/[A1(0)]}=1.695±0.083±0.051, r2={[A2(0)]/[A1(0)]}=0.845±0.056±0.039.
KW - CROSS-SECTION
KW - SIGMA
KW - E(+)E(-)
KW - DECAYS
UR - http://www.scopus.com/inward/record.url?scp=85061554568&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.122.062001
DO - 10.1103/PhysRevLett.122.062001
M3 - Article
C2 - 30822062
AN - SCOPUS:85061554568
VL - 122
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 6
M1 - 062001
ER -
ID: 18539674