Regular Article - Theoretical Physics
form factors from QCD light-cone sum rules
School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, China
2 College of Physics and Optoelectronic engineering, Ocean University of China, 266100, Qingdao, China
3 Frontiers Science Center for Rare Isotopes, and Lanzhou Center for Theoretical Physics, and Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, 730000, Lanzhou, China
4 Center for High Energy Physics, Peking University, 100871, Beijing, China
Accepted: 20 February 2023
Published online: 3 April 2023
In this work, we calculate the transition form factors of decaying into proton and ( and respectively) within the framework of light-cone sum rules with the distribution amplitudes (DAs) of -baryon. In the hadronic representation of the correlation function, we have isolated both the proton and the states so that the form factors can be evaluated simultaneously. Due to the less known properties of the baryons, we investigate three interpolating currents of the light baryons and five parametrization models for DAs of . Numerically, our predictions on the form factors and the branching fractions of from the Ioffe or the tensor currents are consistent with the Lattice simulation and the results from the light-baryon sum rules, as well as the experimental data of . The predictions on the form factors of are very sensitive to the choice of the interpolating currents so that the relevant measurement could be helpful to clarify the properties of baryons.
© The Author(s) 2023
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3. SCOAP3 supports the goals of the International Year of Basic Sciences for Sustainable Development.