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The $ Q^2 $-dependence of the relevant form-factors are obtained. Moreover, the mean square mass radii of $ \\pi $ and $ K $ mesons are calculated and we find that $ \\sqrt{\\langle r_{\\pi}^2 \\rangle} = 0.31 {\\rm\\ fm} $ and $ \\sqrt{\\langle r_{K}^2 \\rangle} = 0.24 {\\rm\\ fm} $, respectively. 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M. Aliev","submitted_at":"2020-09-16T20:30:36Z","abstract_excerpt":"Taking into account only the quark part of the energy-momentum tensor, the gravitational form-factors of the $ \\pi $ 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 $ \\pi $ and $ K $ mesons are calculated and we find that $ \\sqrt{\\langle r_{\\pi}^2 \\rangle} = 0.31 {\\rm\\ fm} $ and $ \\sqrt{\\langle r_{K}^2 \\rangle} = 0.24 {\\rm\\ fm} $, respectively. 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