تقرير
Probing Hidden Leptonic Scalar Portals using the NA64 Experiment at CERN
| العنوان: | Probing Hidden Leptonic Scalar Portals using the NA64 Experiment at CERN |
|---|---|
| المؤلفون: | Ponten, A., Sieber, H., Oberhauser, B. Banto, Crivelli, P., Kirpichnikov, D., Gninenko, S. N., Hösgen, M., Bueno, L. Molina, Mongillo, M., Zhevlakov, A. |
| سنة النشر: | 2024 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | In this study, we demonstrate the potential of the NA64 experiment at CERN SPS to search for New Physics processes involving $e\rightarrow\mu$ transitions after the collision of 100 GeV electrons with target nuclei. A new Dark Sector leptonic portal in which a scalar boson $\varphi$ could be produced in the lepton-flavor-changing bremsstrahlung-like reaction, $eN\rightarrow \mu N\varphi$, is used as benchmark process. In this work, we develop a realistic Monte Carlo simulation of the NA64 experimental setup implementing the differential and total production cross-section computed at exact tree-level and applying the Weisz\"{a}cker-Williams phase space approximation. Using this framework, we investigate the main background sources and calculate the expected sensitivity of the experiment. The results indicate that with minor setup optimization, NA64 can probe a large fraction of the available parameter space compatible with the muon $g-2$ anomaly and the Dark Matter relic predictions in the context of a new Dark Sector leptonic portal with $10^{11}$ EOT. This result paves the way to the exploration of lepton-flavour-changing transitions in NA64. Comment: 11 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2404.15931 |
| رقم الأكسشن: | edsarx.2404.15931 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |