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Search for heavy Majorana neutrino in lepton number violating decays of D -> K Π e(+)e(+)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.ORCID iD: 0000-0002-6945-716x
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.ORCID iD: 0000-0003-4937-2270
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Number of Authors: 4602019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 11, article id 112002Article in journal (Refereed) Published
Abstract [en]

Using a data sample with an integrated luminosity of 2.93 fb(-1) taken at the center-of-mass energy of 3.773 GeV, we search for the Majorana neutrino (nu(m)) in the lepton number violating decays D -> K pi e(+)e(+). No significant signal is observed, and the upper limits on the branching fraction at the 90% confidence level are set to be B(D degrees -> K-pi(-)e(+)e(+)) < 2.8 x 10(-6) , B(D+ -> K-S(0)pi(-) e(+)) < 3.3 x 10(-6) and B(D+ -> K-pi(0)e(+)e(+)) < 85 x 10(-6). The Majorana neutrino is searched for with different mass assumptions ranging from 0.25 to 1.0 GeV/c(2) in the decays D-0 -> K(-)e(+)nu(m),nu(m )-> pi(-)e(+) and D+ -> K(S)(0)e(+)nu(m),nu(m )->( )pi(-)e(+),and the upper limits on the branching fraction at the 90% confidence level are at the level of 10(-7) similar to 10(-6), depending on the mass of the Majorana neutrino. The constraints on the mixing matrix element vertical bar V-e nu m vertical bar(2) are also evaluated.

Place, publisher, year, edition, pages
2019. Vol. 99, no 11, article id 112002
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-389602DOI: 10.1103/PhysRevD.99.112002ISI: 000470863000001OAI: oai:DiVA.org:uu-389602DiVA, id: diva2:1338053
Funder
Swedish Research Council
Note

For complete list of authors see http://dx.doi.org/10.1103/PhysRevD.99.112002

Available from: 2019-07-19 Created: 2019-07-19 Last updated: 2019-07-19Bibliographically approved

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Ikegami Andersson, WalterJohansson, TordKupsc, AndrzejLi, CuiPapenbrock, MichaelPettersson, JoachimSchönning, KarinWolke, Magnus

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