Implication of neutron star observations to the origin of nucleon mass
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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866909715765657600 |
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| author | Gao, Bikai Liu, Xiang Harada, Masayasu Ma, Yong-Liang |
| author_facet | Gao, Bikai Liu, Xiang Harada, Masayasu Ma, Yong-Liang |
| contents | We investigate the implications of neutron star observations for understanding the origin of nucleon mass using a framework that combines three complementary approaches: the equation of state based on parity doublet structure for hadronic matter below $2n_0$, the Nambu-Jona-Lasinio (NJL) model for quark matter above $5n_0$, and a model-independent analysis of the intermediate density region based on fundamental physical principles. By systematically exploring parameter spaces and comparing theoretical predictions with recent observational constraints, we establish constraints on the chiral invariant mass. Our results suggest that more than a half of the nucleon mass originates from sources beyond spontaneous chiral symmetry breaking, challenging conventional understanding of nucleon mass generation. These constraints arise solely from fundamental physical principles and observational data, independent of specific assumptions about the nature of the quark-hadron transition, providing robust insights into the microscopic origin of hadron masses. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_00243 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Implication of neutron star observations to the origin of nucleon mass Gao, Bikai Liu, Xiang Harada, Masayasu Ma, Yong-Liang Nuclear Theory High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory We investigate the implications of neutron star observations for understanding the origin of nucleon mass using a framework that combines three complementary approaches: the equation of state based on parity doublet structure for hadronic matter below $2n_0$, the Nambu-Jona-Lasinio (NJL) model for quark matter above $5n_0$, and a model-independent analysis of the intermediate density region based on fundamental physical principles. By systematically exploring parameter spaces and comparing theoretical predictions with recent observational constraints, we establish constraints on the chiral invariant mass. Our results suggest that more than a half of the nucleon mass originates from sources beyond spontaneous chiral symmetry breaking, challenging conventional understanding of nucleon mass generation. These constraints arise solely from fundamental physical principles and observational data, independent of specific assumptions about the nature of the quark-hadron transition, providing robust insights into the microscopic origin of hadron masses. |
| title | Implication of neutron star observations to the origin of nucleon mass |
| topic | Nuclear Theory High Energy Astrophysical Phenomena Solar and Stellar Astrophysics High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2508.00243 |