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Measurement of the D0→π-e+ν branching fraction, form factor and implications for Vub

  • Institute for Nuclear Physics, Mainz University, Mainz 55128, Germany

Funds:  Supported by DOE and NSF (USA), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MICIIN (Spain), STFC (United Kingdom). Individuals have received support from the DFG (Germany).
Cite this:
https://doi.org/10.3969/j.issn.0253-2778.2016.05.003
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  • Author Bio:

    GRIESSINGER K., male, born in 1984, diploma. Research field: particle physics. E-mail: griess@slac.stanford.edu

  • Received Date: 14 November 2015
  • Accepted Date: 20 April 2016
  • Rev Recd Date: 20 April 2016
  • Publish Date: 31 May 2016
    Abstract

  • Abstract

    The decay D0→π-e+ν is studied at the BaBar experiment using a sample of 500 million c events recorded near the CM energy 106 GeV. Using this data, the branching fraction of the process D0→π-e+ν is extracted, as well as the hadronic form factor fπ+,D and the CKM matrix element Vcd. Applying a relation between the decays D0→π-e+ν and B0→π-e+ν, the matrix element Vub is calculated and its precision will become competitive once new theoretical calculations appear.

    Abstract

    The decay D0→π-e+ν is studied at the BaBar experiment using a sample of 500 million c events recorded near the CM energy 106 GeV. Using this data, the branching fraction of the process D0→π-e+ν is extracted, as well as the hadronic form factor fπ+,D and the CKM matrix element Vcd. Applying a relation between the decays D0→π-e+ν and B0→π-e+ν, the matrix element Vub is calculated and its precision will become competitive once new theoretical calculations appear.
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    • References(16)
  • [1]
    LEES J P, POIREAU V, TISSERAND V, et al. Measurement of the D0→π-e+ve differential decay branching fraction as a function of q2 and study of form factor parameterizations[J]. Phys Rev D, 2015, 91(5): 052022.
    [2]
    AUBERT B, BONA M, BOUTIGNY D, et al (BaBar Collaboration). Measurement of the hadronic form factor in D0→K-e+ve decays[J]. Phys Rev D, 2007, 76:052005.
    [3]
    FOX G C, WOLFRAM S. Observables for the analysis of event shapes in e+e- annihilation and other processes[J]. Phys Rev Lett, 1978, 41:1 581-1 585.
    [4]
    FOX G C, WOLFRAM S. Event shapes in e+e- annihilation[J]. Nucl Phys B, 1979, 149:413-496 (Erratum: Nucl Phys B, 1979, 157: 543).
    [5]
    AMHIS Y, BANERJEE SW, BERNHARD R, et al (Heavy Flavor Averaging Group). Averages of b-hadron, c-hadron, and tau-lepton properties as of early 2012[DB/OL]. arXiv:1207.1158 [hep-ex].
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    DEL AMO SANCHEZ P, LEES J P, POIREAU V, et al (BaBar Collaboration). Observation of new resonances decaying to Dπ and D*π in inclusive e+e- collisions near s =1058 GeV[J]. Phys Rev D, 2010, 82: 111101(R).
    [11]
    LEES J P, POIREAU V, TISSERAND V, et al. Measurement of the D*(2010)+ natural line width and the D*(2010)+-D0 mass difference[J]. Phys Rev D, 2013, 88(5):052003 (Erratum: Phys Rev D 2013, 88(7): 079902).
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    GODFREY S, ISGUR N. Mesons in a relativized quark model with chromodynamics[J]. Phys Rev D, 1985, 32:189-231.
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    OYANGUREN A. Measurement of the D0→π-e+v branching fraction, form factor and implications for Vub[C]// 7th International Workshop on Charm Physics (Charm 2015). Detroit, MI, USA, May 18-22, 2015.
    [14]
    LEES J P, POIREAU V, TISSERAND V, et al (BaBar Collaboration). Branching fraction and form-factor shape measurements of exclusive charmless semileptonic B decays, and determination of Vub[J]. Phys Rev D, 2012, 86: 092004.
    [15]
    COLANGELO P, DE FAZIO F, GIANNUZZI F, et al. New meson spectroscopy with open charm and beauty[J]. Phys Rev D, 2012, 86: 054024.
    [16]
    BURDMAN G, KAMBOR J. Dispersive approach to semileptonic form-factors in heavy to light meson decays[J]. Phys Rev D, 1997, 55: 2 817-2 826.
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    [1]
    LEES J P, POIREAU V, TISSERAND V, et al. Measurement of the D0→π-e+ve differential decay branching fraction as a function of q2 and study of form factor parameterizations[J]. Phys Rev D, 2015, 91(5): 052022.
    [2]
    AUBERT B, BONA M, BOUTIGNY D, et al (BaBar Collaboration). Measurement of the hadronic form factor in D0→K-e+ve decays[J]. Phys Rev D, 2007, 76:052005.
    [3]
    FOX G C, WOLFRAM S. Observables for the analysis of event shapes in e+e- annihilation and other processes[J]. Phys Rev Lett, 1978, 41:1 581-1 585.
    [4]
    FOX G C, WOLFRAM S. Event shapes in e+e- annihilation[J]. Nucl Phys B, 1979, 149:413-496 (Erratum: Nucl Phys B, 1979, 157: 543).
    [5]
    AMHIS Y, BANERJEE SW, BERNHARD R, et al (Heavy Flavor Averaging Group). Averages of b-hadron, c-hadron, and tau-lepton properties as of early 2012[DB/OL]. arXiv:1207.1158 [hep-ex].
    [6]
    OLIVE K A, AGASHE K, AMSLER C, et al (Particle Data Group). Review of particle physics[J]. Chinese Physics C, 2014, 38: 090001.
    [7]
    BOYD C G, SAVAGE M J. Analyticity, shapes of semileptonic form factors, and B→πl [J]. Phys Rev D, 1997, 56:303-311.
    [8]
    AOKI S, AOKI Y, BERNARD C, et al (FLAG Working Group). Review of lattice results concerning low-energy particle physics[J]. Eur Phys J C, 2014, 74: 2890.
    [9]
    BECIREVIC D, YAOUANC A L, OYANGUREN A, et al. Insight into D/B→πlvl  decay using the pole models[DB/OL]. arXiv:1407.1019 [hep-ph].
    [10]
    DEL AMO SANCHEZ P, LEES J P, POIREAU V, et al (BaBar Collaboration). Observation of new resonances decaying to Dπ and D*π in inclusive e+e- collisions near s =1058 GeV[J]. Phys Rev D, 2010, 82: 111101(R).
    [11]
    LEES J P, POIREAU V, TISSERAND V, et al. Measurement of the D*(2010)+ natural line width and the D*(2010)+-D0 mass difference[J]. Phys Rev D, 2013, 88(5):052003 (Erratum: Phys Rev D 2013, 88(7): 079902).
    [12]
    GODFREY S, ISGUR N. Mesons in a relativized quark model with chromodynamics[J]. Phys Rev D, 1985, 32:189-231.
    [13]
    OYANGUREN A. Measurement of the D0→π-e+v branching fraction, form factor and implications for Vub[C]// 7th International Workshop on Charm Physics (Charm 2015). Detroit, MI, USA, May 18-22, 2015.
    [14]
    LEES J P, POIREAU V, TISSERAND V, et al (BaBar Collaboration). Branching fraction and form-factor shape measurements of exclusive charmless semileptonic B decays, and determination of Vub[J]. Phys Rev D, 2012, 86: 092004.
    [15]
    COLANGELO P, DE FAZIO F, GIANNUZZI F, et al. New meson spectroscopy with open charm and beauty[J]. Phys Rev D, 2012, 86: 054024.
    [16]
    BURDMAN G, KAMBOR J. Dispersive approach to semileptonic form-factors in heavy to light meson decays[J]. Phys Rev D, 1997, 55: 2 817-2 826.
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