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<p>We calculate the so-called radiative tail for the three-particle light-cone distribution amplitudes (LCDAs) of the Λ<sub><i>b</i></sub> baryon, following from the short-distance expansion of the defining light-ray operators in heavy-quark effective theory (HQET). To illustrate the effect of the radiative tail, we introduce a simple (model-dependent) extrapolation to large distances (respectively small momenta), which preserves the analytic properties of the LCDAs in HQET. We observe a similar qualitative behaviour as has been discussed for the <i>B</i>-meson case.</p>

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Radiative tail of the three-particle light-cone distribution amplitudes for the Λb baryon in HQET

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  • 发表日期：

    2025年7月8日

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  • Thorsten Feldmann,
  • Daniel Vladimirov

摘要

We calculate the so-called radiative tail for the three-particle light-cone distribution amplitudes (LCDAs) of the Λb baryon, following from the short-distance expansion of the defining light-ray operators in heavy-quark effective theory (HQET). To illustrate the effect of the radiative tail, we introduce a simple (model-dependent) extrapolation to large distances (respectively small momenta), which preserves the analytic properties of the LCDAs in HQET. We observe a similar qualitative behaviour as has been discussed for the B-meson case.