Predictions for $$\Xi _b^- \rightarrow \pi ^- (D_s^- ) \ \Xi _c^0 (2790) \left( \Xi _c^0 (2815) \right) $$ Ξ b - → π - ( D s - ) Ξ c 0 ( 2790 ) Ξ c 0 ( 2815 ) and $$\Xi _b^- \rightarrow \bar{\nu }_l l \ \Xi _c^0 (2790) \left( \Xi _c^0 (2815) \right) $$ Ξ b - → ν ¯ l l Ξ c 0 ( 2790 ) Ξ c 0 ( 2815 )

European Physical Journal C: Particles and Fields

E. Oset¹  Wei-Hong Liang²  J. Nieves³  R. P. Pavao³ 

[1]Departamento de Física Teórica and IFIC, Institutos de Investigación de Paterna, Centro Mixto Universidad de Valencia-CSIC

[2]Department of Physics, Guangxi Normal University

[3]Instituto de Física Corpuscular (IFIC), Institutos de Investigación de Paterna, Centro Mixto CSIC-Universidad de Valencia

关键词: Vector Meson;    Rest Frame;    Weak Decay;    Semileptonic Decay;    Radial Wave Function;   

DOI  :  10.1140/epjc/s10052-017-4836-3

来源: DOAJ

【 摘 要 】

Abstract We have performed calculations for the nonleptonic $$\Xi _b^- \rightarrow \pi ^- \ \Xi _c^0 (2790) \left( J=\frac{1}{2}\right) $$ Ξ b - → π - Ξ c 0 ( 2790 ) J = 1 2 and $$\Xi _b^- \rightarrow \pi ^- \ \Xi _c^0 (2815) \left( J=\frac{3}{2}\right) $$ Ξ b - → π - Ξ c 0 ( 2815 ) J = 3 2 decays and the same reactions replacing the $$\pi ^-$$ π - by a $$D_s^-$$ D s - . At the same time we have also evaluated the semileptonic rates for $$\Xi _b^- \rightarrow \bar{\nu }_l l \ \Xi _c^0 (2790)$$ Ξ b - → ν ¯ l l Ξ c 0 ( 2790 ) and $$\Xi _b^- \rightarrow \bar{\nu }_l l \ \Xi _c^0 (2815)$$ Ξ b - → ν ¯ l l Ξ c 0 ( 2815 ) . We look at the reactions from the perspective that the $$\Xi _c^0 (2790)$$ Ξ c 0 ( 2790 ) and $$\Xi _c^0 (2815)$$ Ξ c 0 ( 2815 ) resonances are dynamically generated from the pseudoscalar–baryon and vector–baryon interactions. We evaluate ratios of the rates of these reactions and make predictions that can be tested in future experiments. We also find that the results are rather sensitive to the coupling of the $$\Xi _c^*$$ Ξ c ∗ resonances to the $$D^* \Sigma $$ D ∗ Σ and $$D^* \Lambda $$ D ∗ Λ components.

【 授权许可】

Unknown