Investigating three body charm hadron decays with missing energy within non-minimal SU(5)
European Physical Journal C, cilt.85, sa.11, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 85 Sayı: 11
- Basım Tarihi: 2025
- Doi Numarası: 10.1140/epjc/s10052-025-14881-9
- Dergi Adı: European Physical Journal C
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, Directory of Open Access Journals, Nature Index
- Süleyman Demirel Üniversitesi Adresli: Evet
Özet
In the Standard Model, the c→uνν¯ transition arises only at the one-loop level, leading to extremely suppressed branching ratios for the corresponding three-body decays of charmed hadrons. This suppression motivates the search for possible enhancements from physics beyond the Standard Model. In this work, we study the contributions to the c→uνν¯ transition from the R2a2 scalar leptoquark predicted in the Non-Minimal SU(5) GUT framework. We derive constraints on the model parameters using the recent BESIII results on D0→π0νν¯ and available data on D0–D¯0 mixing. Additional bounds from direct LHC searches for scalar leptoquarks, lepton flavor violation processes, and the LHCb upper limit on B(D0→μ+μ-) are also taken into account. After imposing all constraints, we show that the branching ratios of the three-body charmed hadron decays with missing energy can be enhanced up to O(10-6).