Work

B → X c ℓ ν ¯ decay as a probe of complex conjugate poles

Year: 2025

Type: article

Abstract: In this work, nontrivial analytic structure of the quark propagator is discussed for B -meson inclusive decays. Attributed to invalidity of the standard Källén-Lehman spectral representation, complex conjugate poles alter the evaluation of decay rates, which lead to violation of quark-hadron duality. As phenomenological observables, widths in B → X c ℓ ν ¯ decay as well as the lifetime of the B d 0 meson are discussed. In the presence of the mentioned nonanalytical contributions, the possibility for resolving the | V c b | puzzle is addressed. It is demonstrated that there exists a parameter region, which explains | V c b | and B d 0 -meson lifetime simultaneously within 1 σ via the complex conjugate poles from a charm quark.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/ky9k-mmxd

Authors: Jinglong Zhu, Hiroyuki Umeeda

Institutions: Jilin University, Institute of High Energy Physics, China Center of Advanced Science and Technology

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, Jilin University

Award: G8499685647