Determination of the absolute branching fractions of D 0 → K − e + ν e and D + → K ¯ 0 e + ν e

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doi:10.1103/PhysRevD.104.052008

Title: Determination of the absolute branching fractions of $D^{0} \to K^{-} e^{+} ν_{e}$ and $D^{+} \to {\bar{K}}^{0} e^{+} ν_{e}$

Journal Article · Wed Sep 15 00:00:00 EDT 2021 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.104.052008· OSTI ID:1820476

Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, X. H.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Balossino, I.; Ban, Y.; Begzsuren, K.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F. more »

Using 2.93 fb^–1 of e⁺e^– collision data collected with the BESIII detector at a center-of-mass energy of 3.773 GeV, we measure the absolute branching fractions of the decays D⁰ → K^–e⁺ν_e and D⁺ → $$\bar{K}^{0}e^{+}ν_{e}$$ to be (3.567 ± 0.031_stat ± 0.025_syst)% and (8.68 ± 0.14_stat ± 0.16_syst)%, respectively. Starting with the process e⁺e^– → $$D\bar{D}$$, a new reconstruction method is employed to select events that contain candidates for both D → $$\bar{K}e^{+}ν_{e}$$ and $$\bar{D} → Ke^{–}\bar{ν}_{e}$$ decays. The branching fractions reported in this work are consistent within uncertainties with previous BESIII measurements that selected events containing D → $$\bar{K}e^{+}ν_{e}$$ and hadronic $$\bar{D}$$ decays. Combining our results with the lifetimes of the D⁰ and D⁺ mesons and the previous BESIII measurements leads to a ratio of the two decay partial widths of $$\frac{\bar{Γ}_{D^{0} → K^{–}e^{+}ν_{e}}}{\bar{Γ}_{D^{+} → \bar{K}^{0}e^{+}ν_{e}}}$$ = 1.039 ± 0.021. This ratio supports isospin symmetry in the D⁰ → K^–e⁺ν_e and D⁺ → $$\bar{K}^{0}e^{+}ν_{e}$$ decays within 1.9σ.

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Research Organization:: Indiana Univ., Bloomington, IN (United States); Univ. of Minnesota, Minneapolis, MN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: BESIII Collaboration

Grant/Contract Number:: FG02-05ER41374; SC-0012069; SC0012069

OSTI ID:: 1820476

Alternate ID(s):: OSTI ID: 1849642

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 104 Journal Issue: 5; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Direct measurements of the branching fractions for <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>D</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mi>e</mml:mi></mml:msub></mml:math> and <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>D</mml:mi><mml:mn>0</mml:mn></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>π</mml:mi><mml:mo>−</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msub><mml:mi>ν</mml:mi><mml:mi>e</mml:mi></mml:msub></mml:math> and determinations of the form factors <mml:math altimg="si3.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msubsup><mml:mi>f</mml:mi><mml:mo>+</mml:mo><mml:mi>K</mml:mi></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>0</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> and <mml:math altimg="si4.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msubsup><mml:mi>f</mml:mi><mml:mo>+</mml:mo><mml:mi>π</mml:mi></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>0</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> Ablikim, M.; Bai, J. Z.; Ban, Y. Physics Letters B, Vol. 597, Issue 1 https://doi.org/10.1016/j.physletb.2004.07.004	journal	September 2004
Measurements of exclusive semileptonic decays of D mesons Bean, A.; Gronberg, J.; Kutschke, R. Physics Letters B, Vol. 317, Issue 4 https://doi.org/10.1016/0370-2693(93)91385-Z	journal	November 1993
Event generators at BESIII Rong-Gang, Ping Chinese Physics C, Vol. 32, Issue 8 https://doi.org/10.1088/1674-1137/32/8/001	journal	August 2008
Comment on the heavy→light form factors Becirevic, Damir; Kaidalov, Alexei B. Physics Letters B, Vol. 478, Issue 4 https://doi.org/10.1016/S0370-2693(00)00290-2	journal	April 2000
Measurement of e ⁺ e ⁻ → DD̄ cross sections at the ψ(3770) resonance Ablikim, M.; Achasov, M. N.; Ahmed, S. Chinese Physics C, Vol. 42, Issue 8 https://doi.org/10.1088/1674-1137/42/8/083001	journal	July 2018
Observation of the Doubly Cabibbo-Suppressed Decay $D^{+} \to K^{+} π^{+} π^{-} π^{0}$ and Evidence for $D^{+} \to K^{+} ω$ Ablikim, M.; Achasov, M. N.; Adlarson, P. Physical Review Letters, Vol. 125, Issue 14 https://doi.org/10.1103/PhysRevLett.125.141802	journal	October 2020
Observation of the Semileptonic $D^{+}$ Decay into the ${\bar{K}}_{1} (1270)^{0}$ Axial-Vector Meson Ablikim, M.; Achasov, M. N.; Adlarson, P. Physical Review Letters, Vol. 123, Issue 23 https://doi.org/10.1103/PhysRevLett.123.231801	journal	December 2019
First Observation of $D^{+} \to η μ^{+} ν_{μ}$ and Measurement of Its Decay Dynamics Ablikim, M.; Achasov, M. N.; Adlarson, P. Physical Review Letters, Vol. 124, Issue 23 https://doi.org/10.1103/PhysRevLett.124.231801	journal	June 2020
Improved measurements of $D$ meson semileptonic decays to $π$ and $K$ mesons Besson, D.; Pedlar, T. K.; Xavier, J. Physical Review D, Vol. 80, Issue 3 https://doi.org/10.1103/PhysRevD.80.032005	journal	August 2009
Study of decay dynamics and $C P$ asymmetry in $D^{+} \to K_{L}^{0} e^{+} ν_{e}$ decay Ablikim, M.; Achasov, M. N.; Ai, X. C. Physical Review D, Vol. 92, Issue 11 https://doi.org/10.1103/PhysRevD.92.112008	journal	December 2015
Geant4—a simulation toolkit Agostinelli, S.; Allison, J.; Amako, K. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3 https://doi.org/10.1016/S0168-9002(03)01368-8	journal	July 2003
Study of the semileptonic decay mode $D^{0}$ → $K^{-}$ $e^{+}$ $ν_{e}$ Anjos, J. C.; Appel, J. A.; Bean, A. Physical Review Letters, Vol. 62, Issue 14 https://doi.org/10.1103/PhysRevLett.62.1587	journal	April 1989
Observation of $D^{+} \to η η π^{+}$ and improved measurement of $D^{0 (+)} \to η π^{+} π^{- (0)}$ Ablikim, M.; Achasov, M. N.; Adlarson, P. Physical Review D, Vol. 101, Issue 5 https://doi.org/10.1103/PhysRevD.101.052009	journal	March 2020
Measurement of the hadronic form factor in $D^{0} \to K^{-} e^{+} ν_{e}$ decays Aubert, B.; Bona, M.; Boutigny, D. Physical Review D, Vol. 76, Issue 5 https://doi.org/10.1103/PhysRevD.76.052005	journal	September 2007
Study of the decay $D^{0} \to {\bar{K}}^{0} π^{-} e^{+} ν_{e}$ Ablikim, M.; Achasov, M. N.; Ahmed, S. Physical Review D, Vol. 99, Issue 1 https://doi.org/10.1103/PhysRevD.99.011103	journal	January 2019
Coherent exclusive exponentiation for precision Monte Carlo calculations Jadach, S.; Ward, B. F. L.; Wa̧s, Z. Physical Review D, Vol. 63, Issue 11 https://doi.org/10.1103/PhysRevD.63.113009	journal	May 2001
QED bremsstrahlung in semileptonic B and leptonic τ decays Richter-Wa̧s, E. Physics Letters B, Vol. 303, Issue 1-2 https://doi.org/10.1016/0370-2693(93)90062-M	journal	April 1993
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
Measurements of the absolute branching fractions of $D^{0 (+)} \to K \bar{K} π π$ decays Ablikim, M.; Achasov, M. N.; Adlarson, P. Physical Review D, Vol. 102, Issue 5 https://doi.org/10.1103/PhysRevD.102.052006	journal	September 2020
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

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Astronomy & Astrophysics
Physics
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Leptonic
semileptonic and radiative decays
Charmed mesons
Hadrons
Mesons
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Lepton colliders
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Title: Determination of the absolute branching fractions of D 0 → K − e + ν e and D + → K ¯ 0 e + ν e

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Title: Determination of the absolute branching fractions of $D^{0} \to K^{-} e^{+} ν_{e}$ and $D^{+} \to {\bar{K}}^{0} e^{+} ν_{e}$