تقرير
Collisions and collective flavor conversion: Integrating out the fast dynamics
| العنوان: | Collisions and collective flavor conversion: Integrating out the fast dynamics |
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| المؤلفون: | Fiorillo, Damiano F. G., Padilla-Gay, Ian, Raffelt, Georg G. |
| المصدر: | Phys.Rev.D 109 (2024) 6, 063021 |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | In dense astrophysical environments, notably core-collapse supernovae and neutron star mergers, neutrino-neutrino forward scattering can spawn flavor conversion on very short scales. Scattering with the background medium can impact collective flavor conversion in various ways, either damping oscillations or possibly setting off novel collisional flavor instabilities (CFIs). A key feature in this process is the slowness of collisions compared to the much faster dynamics of neutrino-neutrino refraction. Assuming spatial homogeneity, we leverage this hierarchy of scales to simplify the description accounting only for the slow dynamics driven by collisions. We illustrate our new approach both in the case of CFIs and in the case of fast instabilities damped by collisions. In both cases, our strategy provides new equations, the slow-dynamics equations, that simplify the description of flavor conversion and allow us to qualitatively understand the final state of the system after the instability, either collisional or fast, has saturated. Comment: Added footnote 2 to correct an algebraic error; version corresponding to Erratum in PRD |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2312.07612 |
| رقم الأكسشن: | edsarx.2312.07612 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |