Predictions for and

R. P. Pavao; Wei-Hong Liang; J. Nieves; E. Oset

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

EPJ

a
b
c
d
e
ap
st
h
plus
ds
pv
ti
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am
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2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2017) 77: 265
https://doi.org/10.1140/epjc/s10052-017-4836-3

Regular Article - Theoretical Physics

Predictions for $\Xi _b^- \rightarrow \pi ^- (D_s^- ) \ \Xi _c^0 (2790) \left( \Xi _c^0 (2815) \right)$ and $\Xi _b^- \rightarrow \bar{\nu }_l l \ \Xi _c^0 (2790) \left( \Xi _c^0 (2815) \right)$

R. P. Pavao¹, Wei-Hong Liang²^*, J. Nieves¹ and E. Oset³

¹ Instituto de Física Corpuscular (IFIC), Institutos de Investigación de Paterna, Centro Mixto CSIC-Universidad de Valencia, Apartado 22085, 46071, Valencia, Spain
² Department of Physics, Guangxi Normal University, Guilin, 541004, China
³ Departamento de Física Teórica and IFIC, Institutos de Investigación de Paterna, Centro Mixto Universidad de Valencia-CSIC, Aptdo. 22085, 46071, Valencia, Spain

^* e-mail: liangwh@gxnu.edu.cn

Received: 13 February 2017
Accepted: 13 April 2017
Published online: 26 April 2017

Abstract

We have performed calculations for the nonleptonic $\Xi _b^- \rightarrow \pi ^- \ \Xi _c^0 (2790) \left( J=\frac{1}{2}\right)$ and $\Xi _b^- \rightarrow \pi ^- \ \Xi _c^0 (2815) \left( J=\frac{3}{2}\right)$ decays and the same reactions replacing the $\pi ^-$ by a $$D_s^-$$ . At the same time we have also evaluated the semileptonic rates for $\Xi _b^- \rightarrow \bar{\nu }_l l \ \Xi _c^0 (2790)$ and $\Xi _b^- \rightarrow \bar{\nu }_l l \ \Xi _c^0 (2815)$ . We look at the reactions from the perspective that the $\Xi _c^0 (2790)$ and $\Xi _c^0 (2815)$ 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 $\Xi _c^*$ resonances to the $D^* \Sigma$ and $D^* \Lambda$ components.