Addressing the R-D(*) anomalies with an S-1 leptoquark from SO(10) grand unification

Creative Commons License

AYDEMİR U., Mandal T., Mitra S.

PHYSICAL REVIEW D, cilt.101, sa.1, 2020 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 101 Sayı: 1
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1103/physrevd.101.015011
  • Dergi Adı: PHYSICAL REVIEW D
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, INSPEC, zbMATH
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

Motivated by the R-D(*) anomalies, we investigate an SO(10) grand unification scenario where a charge -1/3 scalar leptoquark (S-1) remains as the only new physics candidate at the TeV scale. This leptoquark along with the Standard Model (SM) Higgs doublet originates from the same ten-dimensional real scalar multiplet in the SO(10) grand unification framework taking its mass close to the electroweak scale. We explicitly show how the gauge coupling unification is achieved with only one intermediate symmetrybreaking scale at which the Pati-Salam gauge group is broken into the SM group. We investigate the phenomenological implications of our scenario and show that an S-1 with a specific Yukawa texture can explain the R-D(*) anomalies. We perform a multiparameter scan considering the relevant flavor constraints on R-D(*), F-L(D*), P-tau(D*) and R-K(*)(vv) as well as the constraint coming from the Z -> tau tau decay and the latest Dr resonance search data at the LHC. Our analysis shows that a single leptoquark solution to the observed R-D(*) anomalies with S-1 is still a viable solution.