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arXiv · 1401.3320

Proton polarisabilities from Compton data using Covariant Chiral EFT

Vadim Lensky·Judith A. McGovern
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Abstract

We present a fit of the spin-independent electromagnetic polarisabilities of the proton to low-energy Compton scattering data in the framework of covariant baryon chiral effective field theory. Using the Baldin sum rule to constrain their sum, we obtain $α=[10.6\pm0.25$(stat)$\pm0.2$(Baldin)$\pm0.4$(theory)$]\times10^{-4}$fm$^3$ and $β=[3.2\mp0.25$(stat)$\pm0.2$(Baldin)$\mp0.4$(theory)$]\times10^{-4}$fm$^3$, in excellent agreement with other chiral extractions of the same quantities.

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Vadim Lensky, Judith A. McGovern. 2014-01-14. Proton polarisabilities from Compton data using Covariant Chiral EFT. https://doi.org/10.1103/physrevc.89.032202

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