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Study of decay dynamics and CP asymmetry in D+ -> K(L)(0)e(+)nu(e) decay
Inst High Energy Phys, Beijing 100049, Peoples R China..
GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
Inst High Energy Phys, Beijing 100049, Peoples R China..
Carnegie Mellon Univ, Pittsburgh, PA 15213 USA..
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2015 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 92, no 11, 112008Article in journal (Refereed) Published
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Abstract [en]

Using 2.92 fb(-1) of electron-positron annihilation data collected at root s = 3.773 GeV with the BESIII detector, we obtain the first measurements of the absolute branching fraction B(D+ -> K(L)(0)e(+)nu(e)) = (4.481 +/- 0.027(stat) +/- 0.103(sys))% and the CP asymmetry A(CP)(D+-> KL0e+nu e) = (-0.59 +/- 0.60(stat) +/- 1.48(sys))%. From the D+ -> K(L)(0)e(+)nu(e) differential decay rate distribution, the product of the hadronic form factor and the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element, f(+)(K)(0)vertical bar V-cs vertical bar, is determined to be 0.728 +/- 0.006(stat) +/- 0.011(sys). Using vertical bar V-cs vertical bar from the SM constrained fit with the measured f(+)(K)(0)vertical bar V-cs vertical bar, f(+)(K)(0) = 0.748 +/- 0.007(stat) +/- 0.012(sys) is obtained, and utilizing the unquenched Lattice QCD (LQCD) calculation for f(+)(K)(0), vertical bar V-cs vertical bar = 0.975 +/- 0.008(stat) +/- 0.015(sys) +/- 0.025(LQCD).

Place, publisher, year, edition, pages
2015. Vol. 92, no 11, 112008
National Category
Atom and Molecular Physics and Optics
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URN: urn:nbn:se:uu:diva-274932DOI: 10.1103/PhysRevD.92.112008ISI: 000367380800001OAI: oai:DiVA.org:uu-274932DiVA: diva2:898108
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Swedish Research Council
Available from: 2016-01-27 Created: 2016-01-26 Last updated: 2017-11-30Bibliographically approved

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