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The double-spin-polarization observable $\mathbb{E}$ for$\vec{\gamma}\vec{p}\to p\pi^0$ has been measured with the CEBAF LargeAcceptance Spectrometer (CLAS) at photon beam energies $E_\gamma$ from 0.367 to$2.173~\mathrm{GeV}$ (corresponding to center-of-mass energies from 1.240 to$2.200~\mathrm{GeV}$) for pion center-of-mass angles,$\cos\theta_{\pi^0}^{c.m.}$, between -0.86 and 0.82. These new CLASmeasurements cover a broader energy range and have smaller uncertaintiescompared to previous CBELSA data and provide an important independent check onsystematics. These measurements are compared to predictions as well as newglobal fits from The George Washington University, Mainz, and Bonn-Gatchinagroups. Their inclusion in multipole analyses will refine our understanding ofthe single-pion production contribution to the Gerasimov-Drell-Hearn sum ruleand improve the determination of resonance properties.

Measurement of the helicity asymmetry $\mathbb{E}$ for the $\vec{\gamma}\vec{p} \to p \pi^0$ reaction in the resonance region