Observation of D + → f 0 ( 500 ) e + ν e and Improved Measurements of D → ρ e + ν e

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doi:10.1103/PhysRevLett.122.062001

Title: Observation of $D^{+} \to f_{0} (500) e^{+} ν_{e}$ and Improved Measurements of $D \to ρ e^{+} ν_{e}$

Journal Article · Wed Feb 13 00:00:00 EST 2019 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.122.062001· OSTI ID:1494662

Ablikim, M.; Achasov, M. N.; Ahmed, S.; Albrecht, M.; Alekseev, M.; Amoroso, A.; An, F. F.; An, Q.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Ban, Y.; Begzsuren, K.; Bennett, D. W.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Boger, E. more »

Utilizing 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⁺v_e and D⁺→π^-π⁺e⁺v_e . Using a partial wave analysis, the π⁺π^- S-wave contribution to D⁺→π^-π⁺e⁺v_e is observed for the first time besides the dominant P-wave contribution; the statistical significance is greater than 10σ with its measured fraction (25.7 ± 1.6 ± 1.1)%. We measure the branching fractions $$\mathcal{B(D^0→p^-e^+v_e)}$$ = (1.445 ± 0.058 ± 0.039) × 10^-3, $$\mathcal{B(D^+→p^0e^+v_e)}$$ = (1.860 ± 0.070 ± 0.061) × 10^-3 and $$\mathcal{B(D^+→f_0(500)e^+v_e)}$$, f₀(500)→ π⁺π^-) = (6.30 ± 0.43 ± 0.32) × 10^-4. An upper limit of $$\mathcal{B(D^+→f_0(980)e^+v_e)}$$, 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⁺v_e at q² = 0 assuming the single-pole dominance parameterization: r_v= {[V(0)]/[A₁(0)]} = 1.695 ± 0.083 ± 0.051, r₂ = {[A₂(0)]\[A₁(0)]} = 0.845 ± 0.056 ± 0.039.

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Research Organization:: George Washington Univ. Virginia Science and Technology Campus, Ashburn, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: BESIII Collaboration

Grant/Contract Number:: FG02-05ER41374; SC-0010118; SC-0010504; SC-0012069; SC0016583

OSTI ID:: 1494662

Alternate ID(s):: OSTI ID: 1504152

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Vol. 122 Journal Issue: 6; ISSN 0031-9007

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 19 works

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Investigating the nature of light scalar mesons with semileptonic decays of $D$ mesons Sekihara, Takayasu; Oset, Eulogio Physical Review D, Vol. 92, Issue 5 https://doi.org/10.1103/PhysRevD.92.054038	journal	September 2015
Design and construction of the BESIII detector Ablikim, M.; An, Z. H.; Bai, J. Z. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 614, Issue 3 https://doi.org/10.1016/j.nima.2009.12.050	journal	March 2010
Chiral dynamics, S-wave contributions and angular analysis in $$D\rightarrow \pi \pi \ell \bar{\nu }$$ D → π π ℓ ν ¯ Shi, Yu-Ji; Wang, Wei; Zhao, Shuai The European Physical Journal C, Vol. 77, Issue 7 https://doi.org/10.1140/epjc/s10052-017-5016-1	journal	July 2017
Measurement of the branching fractions for $D^{0}$ → $π^{-}$ $e^{+}$ $ν_{e}$ and $D^{0}$ → $K^{-}$ $e^{+}$ $ν_{e}$ and determination of ‖ $V_{cd}$ / $V_{cs}$ $‖^{2}$ Adler, J.; Becker, J. J.; Blaylock, G. T. Physical Review Letters, Vol. 62, Issue 16 https://doi.org/10.1103/PhysRevLett.62.1821	journal	April 1989

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Exclusive semileptonic decays of D and Ds mesons in the covariant confining quark model Ivanov, M. A.; Körner, J. G.; Pandya, J. N. Frontiers of Physics, Vol. 14, Issue 6 https://doi.org/10.1007/s11467-019-0908-1	journal	July 2019
Open Charm Physics at BESIII Weidenkaﬀ, Peter EPJ Web of Conferences, Vol. 212 https://doi.org/10.1051/epjconf/201921209002	journal	January 2019
Open Charm Physics at BESIII Li, Lei Nuclear Physics B - Proceedings Supplements, Vol. 225-227 https://doi.org/10.1016/j.nuclphysbps.2012.02.024	journal	April 2012
The BESIII physics programme Yuan, Chang-Zheng; Olsen, Stephen Lars Nature Reviews Physics, Vol. 1, Issue 8 https://doi.org/10.1038/s42254-019-0082-y	journal	July 2019

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