Scattering, absorption and emission of highly excited strings
Abstract We study tree-level scattering processes of arbitrary string states using the DDF formalism and suitable coherent vertex operators. We obtain new exact compact formulae for heavy-heavy-light-light scattering amplitudes in open or closed bosonic string theories, and derive explicit exact exp...
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| Format: | Article |
| Language: | English |
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2025-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2025)051 |
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| author | M. Firrotta E. Kiritsis V. Niarchos |
| author_facet | M. Firrotta E. Kiritsis V. Niarchos |
| author_sort | M. Firrotta |
| collection | DOAJ |
| description | Abstract We study tree-level scattering processes of arbitrary string states using the DDF formalism and suitable coherent vertex operators. We obtain new exact compact formulae for heavy-heavy-light-light scattering amplitudes in open or closed bosonic string theories, and derive explicit exact expressions for the absorption cross-sections, and corresponding emission rates, of highly excited string states using the optical theorem and time reversal symmetry. We show that these expressions are independent of the microscopic structure of the excited string states without averaging. For the absorption of massless modes in open string theory, in particular, we find a constant, frequency-independent cross-section. In contrast, the corresponding cross-section for the absorption of massless modes by excited closed strings depends linearly on the frequency, implying a non-trivial grey-body factor. In both cases, at energies below the scale set by the mass of the highly excited strings, we find emission rates with a Boltzmann factor at Hagedorn temperature. |
| format | Article |
| id | doaj-art-4b8f39db16db4ee79b34066cc934e1d8 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-4b8f39db16db4ee79b34066cc934e1d82025-01-19T12:07:09ZengSpringerOpenJournal of High Energy Physics1029-84792025-01-012025115010.1007/JHEP01(2025)051Scattering, absorption and emission of highly excited stringsM. Firrotta0E. Kiritsis1V. Niarchos2Crete Center for Theoretical Physics, Institute for Theoretical and Computational Physics, Department of PhysicsCrete Center for Theoretical Physics, Institute for Theoretical and Computational Physics, Department of PhysicsCrete Center for Theoretical Physics, Institute for Theoretical and Computational Physics, Department of PhysicsAbstract We study tree-level scattering processes of arbitrary string states using the DDF formalism and suitable coherent vertex operators. We obtain new exact compact formulae for heavy-heavy-light-light scattering amplitudes in open or closed bosonic string theories, and derive explicit exact expressions for the absorption cross-sections, and corresponding emission rates, of highly excited string states using the optical theorem and time reversal symmetry. We show that these expressions are independent of the microscopic structure of the excited string states without averaging. For the absorption of massless modes in open string theory, in particular, we find a constant, frequency-independent cross-section. In contrast, the corresponding cross-section for the absorption of massless modes by excited closed strings depends linearly on the frequency, implying a non-trivial grey-body factor. In both cases, at energies below the scale set by the mass of the highly excited strings, we find emission rates with a Boltzmann factor at Hagedorn temperature.https://doi.org/10.1007/JHEP01(2025)051Bosonic StringsModels of Quantum GravityScattering Amplitudes |
| spellingShingle | M. Firrotta E. Kiritsis V. Niarchos Scattering, absorption and emission of highly excited strings Journal of High Energy Physics Bosonic Strings Models of Quantum Gravity Scattering Amplitudes |
| title | Scattering, absorption and emission of highly excited strings |
| title_full | Scattering, absorption and emission of highly excited strings |
| title_fullStr | Scattering, absorption and emission of highly excited strings |
| title_full_unstemmed | Scattering, absorption and emission of highly excited strings |
| title_short | Scattering, absorption and emission of highly excited strings |
| title_sort | scattering absorption and emission of highly excited strings |
| topic | Bosonic Strings Models of Quantum Gravity Scattering Amplitudes |
| url | https://doi.org/10.1007/JHEP01(2025)051 |
| work_keys_str_mv | AT mfirrotta scatteringabsorptionandemissionofhighlyexcitedstrings AT ekiritsis scatteringabsorptionandemissionofhighlyexcitedstrings AT vniarchos scatteringabsorptionandemissionofhighlyexcitedstrings |