Report
Type II Dirac Seesaw with Observable $\Delta N_{\rm eff}$ in the light of W-mass Anomaly
| العنوان: | Type II Dirac Seesaw with Observable $\Delta N_{\rm eff}$ in the light of W-mass Anomaly |
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| المؤلفون: | Borah, Debasish, Mahapatra, Satyabrata, Nanda, Dibyendu, Sahu, Narendra |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment |
| الوصف: | We propose a type II seesaw model for light Dirac neutrinos to provide an explanation for the recently reported anomaly in W boson mass by the CDF collaboration with $7\sigma$ statistical significance. In the minimal model, the required enhancement in W boson mass is obtained at tree level due to the vacuum expectation value of a real scalar triplet, which also plays a role in generating light Dirac neutrino mass. Depending upon the couplings and masses of newly introduced particles, we can have thermally or non-thermally generated relativistic degrees of freedom $\Delta N_{\rm eff}$ in the form of right handed neutrinos which can be observed at future cosmology experiments. Extending the model to a radiative Dirac seesaw scenario can also accommodate dark matter and lepton anomalous magnetic moment. Comment: 10 pages, 9 figures, version accepted for publication in Phys. Lett. B |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physletb.2022.137297 |
| URL الوصول: | http://arxiv.org/abs/2204.08266 |
| رقم الانضمام: | edsarx.2204.08266 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physletb.2022.137297 |
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