Influence of an inert charged Higgs boson on the muon g2 and radiative neutrino masses in a scotogenic model

Chuan-Hung Chen (Department of Physics, National Cheng-Kung University, Tainan 70101, Taiwan) ; Takaaki Nomura (School of Physics, KIAS, Seoul 02455, Korea)

A simple extension of Ma’s approach in a scotogenic model is studied for the purpose of simultaneously interpreting the neutrino data and the excess of the muon anomalous magnetic moment (muon g2). The feasible minimal extension is to add a Z2-odd vectorlike lepton doublet to the Ma’s model. It is found that in addition to the neutrino data, the strict constraints on the relevant parameters are from the electroweak oblique parameters and the induced lepton-flavor violation processes, such as ijγ and ijjj+. Performing a parameter scan, we numerically demonstrate that when the constraint conditions are satisfied, the muon g2 of O(109) can be achieved, where it can be expected that with a 5σ observation, the Muon g2 experiment at Fermilab can observe aμ13.31×1010 when the current experiment and the SM errors are reduced by a factor of 4 and 2, respectively. Moreover, the branching ratio of the τμγ decay can match the Belle II sensitivity of O(109) with an integrated luminosity of 50 ab1.

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      "title": "Influence of an inert charged Higgs boson on the muon <math><mi>g</mi><mo>\u2212</mo><mn>2</mn></math> and radiative neutrino masses in a scotogenic model"
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  "abstracts": [
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      "source": "APS", 
      "value": "A simple extension of Ma\u2019s approach in a scotogenic model is studied for the purpose of simultaneously interpreting the neutrino data and the excess of the muon anomalous magnetic moment (muon <math><mi>g</mi><mo>\u2212</mo><mn>2</mn></math>). The feasible minimal extension is to add a <math><msub><mi>Z</mi><mn>2</mn></msub></math>-odd vectorlike lepton doublet to the Ma\u2019s model. It is found that in addition to the neutrino data, the strict constraints on the relevant parameters are from the electroweak oblique parameters and the induced lepton-flavor violation processes, such as <math><msub><mo>\u2113</mo><mi>i</mi></msub><mo>\u2192</mo><msub><mo>\u2113</mo><mi>j</mi></msub><mi>\u03b3</mi></math> and <math><msub><mo>\u2113</mo><mi>i</mi></msub><mo>\u2192</mo><msubsup><mo>\u2113</mo><mi>j</mi><mo>\u2212</mo></msubsup><msubsup><mo>\u2113</mo><mi>j</mi><mo>\u2212</mo></msubsup><msubsup><mo>\u2113</mo><mi>j</mi><mo>+</mo></msubsup></math>. Performing a parameter scan, we numerically demonstrate that when the constraint conditions are satisfied, the muon <math><mi>g</mi><mo>\u2212</mo><mn>2</mn></math> of <math><mi>O</mi><mo>(</mo><msup><mn>10</mn><mrow><mo>\u2212</mo><mn>9</mn></mrow></msup><mo>)</mo></math> can be achieved, where it can be expected that with a <math><mn>5</mn><mi>\u03c3</mi></math> observation, the Muon <math><mi>g</mi><mo>\u2212</mo><mn>2</mn></math> experiment at Fermilab can observe <math><msub><mi>a</mi><mi>\u03bc</mi></msub><mo>\u2248</mo><mn>13.31</mn><mo>\u00d7</mo><msup><mn>10</mn><mrow><mo>\u2212</mo><mn>10</mn></mrow></msup></math> when the current experiment and the SM errors are reduced by a factor of 4 and 2, respectively. Moreover, the branching ratio of the <math><mi>\u03c4</mi><mo>\u2192</mo><mi>\u03bc</mi><mi>\u03b3</mi></math> decay can match the Belle II sensitivity of <math><mi>O</mi><mo>(</mo><msup><mn>10</mn><mrow><mo>\u2212</mo><mn>9</mn></mrow></msup><mo>)</mo></math> with an integrated luminosity of <math><mrow><mn>50</mn><mtext> </mtext><mtext> </mtext><msup><mrow><mi>ab</mi></mrow><mrow><mo>\u2212</mo><mn>1</mn></mrow></msup></mrow></math>."
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Published on:
17 July 2019
Publisher:
APS
Published in:
Physical Review D , Volume 100 (2019)
Issue 1
DOI:
https://doi.org/10.1103/PhysRevD.100.015024
arXiv:
1903.03380
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

Fulltext files: