The 39th International Symposium on Lattice Field Theory (Lattice 2022)

Calculation of the pion charge radius from an improved model-independent method

12 Aug 2022, 15:30

20m

CP1-HSZ/0.010 (CP1-HSZ) - HS2 (CP1-HSZ)

Oral Presentation Hadron Structure Hadron Structure

Speaker

Kohei Sato (University of Tsukuba)

Description

We investigate an improved analysis method of the recently-proposed model-independent method to obtain the pion charge radius from the electromagnetic pion three-point function. We discuss a systematic error of the original method in small volume, and propose an improvement to reduce it. Using the $N_f=2+1$ lattice QCD data at $m_{\pi }=0.51$ GeV, we compare the result of the pion charge radius from our improved method with the ones from the original method, and also from a traditional model-dependent method.

Presentation materials

Calculation of the pion charge radius from an improved model-independent method.pdf