Using the Virasoro conditions to revise the model of a quark-gluon string fragmentation
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912723669876736 |
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| author | Nikolaenko, Roman |
| author_facet | Nikolaenko, Roman |
| contents | Quark-gluon string fragmentation is usually seen as a universal process with its physics remaining unchanged for different colliding systems and center-of-mass energy. However, there is a way to go beyond this assumption by considering the angular momentum of the fragmenting system. An accurate calculation of the spin of the string requires a specific definition of the initial state of the string. In this paper, I present a new method for defining the initial data for the Nambu-Goto relativistic string and derive the basics of its fragmentation process using the so-called Virasoro conditions. It is shown that very non-trivial consequences arise for non-zero mass strings, including the discrete spectrum of string spin, the discreteness of the possible string breaking points, the close-to-Regge behavior of the spin-mass relation for the light string fragments, and the natural stopping mechanism for fragmentation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_08968 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Using the Virasoro conditions to revise the model of a quark-gluon string fragmentation Nikolaenko, Roman High Energy Physics - Phenomenology Quark-gluon string fragmentation is usually seen as a universal process with its physics remaining unchanged for different colliding systems and center-of-mass energy. However, there is a way to go beyond this assumption by considering the angular momentum of the fragmenting system. An accurate calculation of the spin of the string requires a specific definition of the initial state of the string. In this paper, I present a new method for defining the initial data for the Nambu-Goto relativistic string and derive the basics of its fragmentation process using the so-called Virasoro conditions. It is shown that very non-trivial consequences arise for non-zero mass strings, including the discrete spectrum of string spin, the discreteness of the possible string breaking points, the close-to-Regge behavior of the spin-mass relation for the light string fragments, and the natural stopping mechanism for fragmentation. |
| title | Using the Virasoro conditions to revise the model of a quark-gluon string fragmentation |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2504.08968 |