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Rare Decays of Mesons into Vector Light Mesons.

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Title: Rare Decays of Mesons into Vector Light Mesons.
Authors: Galkin, V. O.1 (AUTHOR) galkin@ccas.ru, Sukhanov, I. S.1,2 (AUTHOR) sukhanov.is17@physics.msu.ru
Source: Physics of Atomic Nuclei. 2025 Suppl 4, Vol. 88, pS423-S430. 8p.
Subjects: Meson decay, Vector mesons, Quark models, Overlap integral, Quantum chromodynamics
Abstract: Rare decays of the mesons into vector light mesons are studied in detail within the framework of the relativistic quark model based on the quasipotential approach and quantum chromodynamics. The hadronic matrix elements of the weak current between meson states are calculated with the consistent account of relativistic effects. The invariant form factors that parameterize these matrix elements are obtained as the overlap integrals of the initial and final meson wave functions. Their dependence on the square of the transferred momentum is explicitly determined within the whole accessible kinematic range. A convenient analytical approximation for numerical values of form factors is given. Effects of electroweak physics at short distances and contributions of the intermediate resonances at long distances are taken into account using effective Wilson coefficients. Helicity formalism is employed for the calculation of the differential decay rates and branching fractions of the charm meson into vector light mesons. Reasonable agreement with experimental upper bounds on the rare decay branching fractions is obtained. [ABSTRACT FROM AUTHOR]
Copyright of Physics of Atomic Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Rare decays of the mesons into vector light mesons are studied in detail within the framework of the relativistic quark model based on the quasipotential approach and quantum chromodynamics. The hadronic matrix elements of the weak current between meson states are calculated with the consistent account of relativistic effects. The invariant form factors that parameterize these matrix elements are obtained as the overlap integrals of the initial and final meson wave functions. Their dependence on the square of the transferred momentum is explicitly determined within the whole accessible kinematic range. A convenient analytical approximation for numerical values of form factors is given. Effects of electroweak physics at short distances and contributions of the intermediate resonances at long distances are taken into account using effective Wilson coefficients. Helicity formalism is employed for the calculation of the differential decay rates and branching fractions of the charm meson into vector light mesons. Reasonable agreement with experimental upper bounds on the rare decay branching fractions is obtained. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Physics of Atomic Nuclei is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1134/S1063778825602458
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      – SubjectFull: Vector mesons
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      – SubjectFull: Quark models
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      – SubjectFull: Overlap integral
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