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Disentangling longitudinal and transverse modes of the $\phi$ meson through dilepton and kaon decays
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abstract
Angular distributions of $\phi$ meson decay amplitudes of $e^+e^-$ and $K^+K^-$ channels are computed using both specific interaction Lagrangians and simple arguments relying on angular momentum conservation. Based on the obtained results, we assess methods to experimentally disentangle the longitudinal and transverse polarization modes of the $\phi$ meson and discuss advantages and disadvantages of employing either the leptonic or hadronic decay modes for this task.
Forward citations
Cited by 3 Pith papers
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Polarization-dependent mass modifications of $\phi$ meson with finite momentum in nuclear matter
In nuclear matter, the phi meson's longitudinal polarization mass decreases quadratically with momentum; the transverse polarization mass stays constant.
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Transverse and longitudinal spin alignment from color fields in heavy ion collisions
Spin alignment of phi mesons along the beam direction is predicted to exceed 1/3 for glasma fields and to show a sign-changing rapidity pattern for isotropic QGP color fields, offering a discriminating observable.
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Polarization of the $\phi$ meson in the hadronic phase with nucleon scatterings and a viscous hydrodynamic background
Kaon and nucleon rescattering plus viscous corrections in a Fluidum hydrodynamic background yield phi spin alignment consistent with zero, in disagreement with STAR data.
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