Semileptonic D meson decays to the vector, axial vector and scalar mesons in Hard-Wall AdS/QCD correspondence

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2022-05, Vol.82 (5), p.1-15, Article 473
• Main Authors: Momeni, S., Saghebfar, M.
• Format: Article
• Language: English
• Subjects: Analysis; Astronomy; Astrophysics and Cosmology; Asymmetry; Collaboration; Correspondence; Decay rate; Elementary Particles; Flavor (particle physics); Form factors; Hadrons; Heavy Ions; Measurement Science and Instrumentation; Mesons; Nuclear Energy; Nuclear Physics; Particle decay; Physics; Physics and Astronomy; Quantum chromodynamics; Quantum Field Theories; Quantum Field Theory; Quarks; Regular Article - Theoretical Physics; String Theory
• ISSN: 1434-6052; 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-022-10413-x

In this work, a Hard-Wall AdS/QCD model with 4 flavours is utilized to calculate the transition form factors for the semileptonic D → ( V , A , S ) ℓ ν ℓ . These decays occur by c → d ℓ ν ℓ transition at quark level for D 0 → ρ - ( b 1 - , a 1 - , a 0 - ) ℓ ν ℓ , D s + → K 0 ( K 1 A 0 , K 1 B 0 ) ℓ ν ℓ decays while the semileptonic decays D 0 → K ∗ - ( K 1 A - , K 1 B - , K 0 - ) ℓ ν ℓ and D + → K ¯ 0 ( K ¯ 1 A 0 , K ¯ 1 B 0 ) ℓ ν ℓ proceed by c → s ℓ ν ℓ transition. The masses and decay constants of scalar mesons as well as the form factors and the branching ratios of aforementioned decays are calculated in our model, and a comparison is also made between our results and predictions of other theoretical methods and the existing experimental values.