Gravitational form-factors of the $ ��$ and $ K $ mesons in QCD sum rules
| Autor: | Aliev, T. M., ��im��ek, K. |
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| Rok vydání: | 2020 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2009.07926 |
| Popis: | Taking into account only the quark part of the energy-momentum tensor, the gravitational form-factors of the $ ��$ and $ K $ mesons are calculated within the light-cone sum rules method using the distribution amplitudes of these pseudoscalar mesons. The $ Q^2 $-dependence of the relevant form-factors are obtained. Moreover, the mean square mass radii of $ ��$ and $ K $ mesons are calculated and we find that $ \sqrt{\langle r_��^2 \rangle} = 0.31 {\rm\ fm} $ and $ \sqrt{\langle r_{K}^2 \rangle} = 0.24 {\rm\ fm} $, respectively. We compare our results for gravitational form-factors with the existing literature results. We obtain that our results on $ \sqrt{\langle r_��^2 \rangle} $ are in good agreement with the predictions of NJL model, AdS/QCD model, and other models as well as with the existing experimental data. 11 pages, 4 figures |
| Databáze: | OpenAIRE |
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