21-23 May 2025
Mexico/General timezone
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Contribution

Effect of the properties of the vector meson K^* on the process e^+ e^- \to K^+ K^- \pi^0 \pi^0

Speakers

  • Mr. Luis Alberto JIMÉNEZ PÉREZ

Primary authors

Content

Vector mesons possess 2s+1 electromagnetic properties (where s=1 is their spin). Specifically, these are the electric charge, the magnetic dipole moment (MDM), and the electric quadrupole moment (EQM). Among these, only the electric charge is experimentally well-determined due to charge conservation laws; the remaining multipoles are merely estimated using effective QCD models, for which no experimental counterpart currently exists. One approach to determine the K^∗ meson’s MDM is to study the e^+e^− \to 2K 2\pi process, analogous to the method used for the W gauge boson in e^+e^− \to 4 leptons reactions. In this work, we investigate this process in the low-energy regime. We propose to evaluate the sensitivity of the e^+e^− \to K^+K^−\pi^0\pi^0 cross-section to the K^ MDM, incorporating all relevant intermediate channels to describe the cross-section, as measured by BaBar, and explore whether it is possible to obtain, for the first time, a value for the magnetic dipole moment of the K^ meson.