# First Measurements of the Double-Polarization Observables $F$, $P$, and $H$ in $\omega$ Photoproduction off Transversely Polarized Protons in the $N^\ast$ Resonance Region

## TL;DR

This paper reports the first measurements of double-polarization observables in omega photoproduction off protons, providing new data that reveal contributions from multiple nucleon resonances and help map the nucleon resonance spectrum.

## Contribution

It presents novel measurements of polarization observables in omega photoproduction using polarized photons and transversely polarized protons, expanding the experimental database.

## Key findings

- Significant contributions from several $N^*$ resonances.
- Observation of new $N^*$ resonances listed in the Review of Particle Properties.
- Results incorporated into partial-wave analyses to improve resonance understanding.

## Abstract

First measurements of double-polarization observables in $\omega$ photoproduction off the proton are presented using transverse target polarization and data from the CEBAF Large Acceptance Spectrometer (CLAS) FROST experiment at Jefferson Lab. The beam-target asymmetry $F$ has been measured using circularly polarized, tagged photons in the energy range 1200 - 2700 MeV, and the beam-target asymmetries $H$ and $P$ have been measured using linearly polarized tagged photons in the energy range 1200 - 2000 MeV. These measurements significantly increase the database on polarization observables. The results are included in two partial-wave analyses and reveal significant contributions from several nucleon ($N^\ast$) resonances. In particular, contributions from new $N^\ast$ resonances listed in the Review of Particle Properties are observed, which aid in reaching the goal of mapping out the nucleon resonance spectrum.