Light sea-quark flavor asymmetry and angular momentum of the nucleon in a scalar-vector spectator model
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911630883815424 |
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| author | Thakuria, Parashmani Lalung, Madhurjya Sarma, Jayanta Kumar |
| author_facet | Thakuria, Parashmani Lalung, Madhurjya Sarma, Jayanta Kumar |
| contents | We present a light-front spectator model that describes the proton as an active sea antiquark paired with a composite scalar-vector spectator. Using a spatial profile based on soft-wall AdS/QCD, we fit our initial parameters to CT18NNLO data and Bacchetta-Radici extractions at an initial scale of $μ_0^2=1.0~\text{GeV}^2$. By allowing these parameters to evolve dynamically, we extend our distributions up to $μ^2=100~\text{GeV}^2$. We specifically calculate the sea-quark asymmetry at the SeaQuest scale, predicting a sustained $\bar{d}$ enhancement at high $x$ that is in excellent agreement with recent E906 measurements. Additionally, we calculate the leading chiral-even generalized parton distributions (GPDs) and evaluate the total angular momentum carried by the sea quarks, comparing our findings with established results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_26306 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Light sea-quark flavor asymmetry and angular momentum of the nucleon in a scalar-vector spectator model Thakuria, Parashmani Lalung, Madhurjya Sarma, Jayanta Kumar High Energy Physics - Phenomenology We present a light-front spectator model that describes the proton as an active sea antiquark paired with a composite scalar-vector spectator. Using a spatial profile based on soft-wall AdS/QCD, we fit our initial parameters to CT18NNLO data and Bacchetta-Radici extractions at an initial scale of $μ_0^2=1.0~\text{GeV}^2$. By allowing these parameters to evolve dynamically, we extend our distributions up to $μ^2=100~\text{GeV}^2$. We specifically calculate the sea-quark asymmetry at the SeaQuest scale, predicting a sustained $\bar{d}$ enhancement at high $x$ that is in excellent agreement with recent E906 measurements. Additionally, we calculate the leading chiral-even generalized parton distributions (GPDs) and evaluate the total angular momentum carried by the sea quarks, comparing our findings with established results. |
| title | Light sea-quark flavor asymmetry and angular momentum of the nucleon in a scalar-vector spectator model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.26306 |