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Abstract <p>Rare decays of <i>D</i> mesons into light pseudoscalar mesons governed by the flavor-changing neutral current are studied in detail. Form factors parameterizing the matrix elements of the weak current between meson states are calculated within the relativistic quark model with consistent consideration of relativistic effects. Contributions from the electroweak interaction at small distances and intermediate resonances at large distances are taken into account using effective Wilson coefficients. On the basis of the helicity amplitude formalism, differential branching fractions were calculated. The results are consistent with existing upper experimental bounds and other theoretical predictions.</p>

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Rare Decays of Charmed Mesons into Pseudoscalar Light Mesons

  • 期刊论文

  • 发表日期：

    2025年6月27日

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  • V. O. Galkin,
  • I. S. Sukhanov

摘要

Abstract

Rare decays of D mesons into light pseudoscalar mesons governed by the flavor-changing neutral current are studied in detail. Form factors parameterizing the matrix elements of the weak current between meson states are calculated within the relativistic quark model with consistent consideration of relativistic effects. Contributions from the electroweak interaction at small distances and intermediate resonances at large distances are taken into account using effective Wilson coefficients. On the basis of the helicity amplitude formalism, differential branching fractions were calculated. The results are consistent with existing upper experimental bounds and other theoretical predictions.