تقرير
Flavour constraints on light spin-1 bosons within a chiral Lagrangian approach
| العنوان: | Flavour constraints on light spin-1 bosons within a chiral Lagrangian approach |
|---|---|
| المؤلفون: | Di Luzio, Luca, Levati, Gabriele, Paradisi, Paride, Díaz, Xavier Ponce |
| سنة النشر: | 2023 |
| المجموعة: | High Energy Physics - Experiment High Energy Physics - Phenomenology |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, High Energy Physics - Experiment |
| الوصف: | We discuss the construction of the chiral Lagrangian for a light spin-1 boson, here denoted as $X$, featuring both vector and axial-vector couplings to light $u,d,s$ quarks. Focusing on $\Delta S = 1$ transitions, we show that there are model-independent tree-level contributions to $K^\pm \to \pi^\pm X$, sourced by Standard Model charged currents, which receive an $m^2_K / m_X^2$ enhancement from the emission of a longitudinally polarized $X$. This flavour observable sets the strongest to date model-independent bound on the diagonal axial-vector couplings of $X$ to $u,d,s$ quarks for $m_X < m_K - m_\pi$, superseding the bounds arising from beam-dump and collider searches. Comment: 15 pages, 5 figures, 1 table |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2308.05215 |
| رقم الأكسشن: | edsarx.2308.05215 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |