Correlating neutrino millicharge and muon $(g-2)$ in an abelian $L_μ-L_τ$ model
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arXiv
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| Format: | Preprint |
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2023
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| _version_ | 1866911782394658816 |
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| author | Alok, Ashutosh Kumar Chundawat, Neetu Raj Singh Mandal, Arindam |
| author_facet | Alok, Ashutosh Kumar Chundawat, Neetu Raj Singh Mandal, Arindam |
| contents | The inclusion of an additional $U(1)$ gauge symmetry is a common feature in many extensions of the Standard Model, revealing the intricate connections between particle physics and cosmology. The $L_μ - L_τ$ model stands as a prominent member of this distinguished family, characterized by its anomaly-free nature and resilience in the face of collider constraints. This framework provides a unique vantage point for investigating both the intriguing mystery of the muon $(g-2)$ anomaly and the puzzling issue of the Hubble tension. However, due to the presence of kinetic mixing between the photon and $Z'$ in this model, the neutrinos have the potential to acquire minuscule electric charges, often referred to as millicharges ($q_ν$) which is directly related to the strength of the new gauge couplings. A crucial question emerges: how does the model's inclusion of millicharges, while adhering to the stringent constraints imposed by experimental observations, influence its inherent ability to address the muon $(g-2)$ anomaly and the Hubble tension? We find the current upper bounds on $q_ν$ derived from experiments such as the beam dump, XENONnT and LUX-ZEPLIN experiments can impose strong constraints on the $U(1)_{L_μ - L_τ}$ coupling. Consequently, these constraints may limit the ability of the model to fully accommodate the current measurement of $(g-2)_μ$ while having a relatively minor impact on the resolution of the Hubble tension. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_05720 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Correlating neutrino millicharge and muon $(g-2)$ in an abelian $L_μ-L_τ$ model Alok, Ashutosh Kumar Chundawat, Neetu Raj Singh Mandal, Arindam High Energy Physics - Phenomenology The inclusion of an additional $U(1)$ gauge symmetry is a common feature in many extensions of the Standard Model, revealing the intricate connections between particle physics and cosmology. The $L_μ - L_τ$ model stands as a prominent member of this distinguished family, characterized by its anomaly-free nature and resilience in the face of collider constraints. This framework provides a unique vantage point for investigating both the intriguing mystery of the muon $(g-2)$ anomaly and the puzzling issue of the Hubble tension. However, due to the presence of kinetic mixing between the photon and $Z'$ in this model, the neutrinos have the potential to acquire minuscule electric charges, often referred to as millicharges ($q_ν$) which is directly related to the strength of the new gauge couplings. A crucial question emerges: how does the model's inclusion of millicharges, while adhering to the stringent constraints imposed by experimental observations, influence its inherent ability to address the muon $(g-2)$ anomaly and the Hubble tension? We find the current upper bounds on $q_ν$ derived from experiments such as the beam dump, XENONnT and LUX-ZEPLIN experiments can impose strong constraints on the $U(1)_{L_μ - L_τ}$ coupling. Consequently, these constraints may limit the ability of the model to fully accommodate the current measurement of $(g-2)_μ$ while having a relatively minor impact on the resolution of the Hubble tension. |
| title | Correlating neutrino millicharge and muon $(g-2)$ in an abelian $L_μ-L_τ$ model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2308.05720 |