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hadron (version 3.1.2)

fs.a0: Finite Size Corrections to \(q\cot\delta\) for I=2 \(\pi\pi\) near threshold

Description

fs.qcotdelta computes the finite size corrections to \(q\cot\delta\) while fs.mpia0 computes the corresponding finite size corrections to \(M_\pi a_0\) directly using the Gasser Leutwyler result from \(M_\pi\).

Usage

fs.a0(a0, mps, L)

Arguments

a0

scattering length at finite L

mps

pion mass as a scalar variable (must not be a vector)

L

spatial lattice extent as a scalar variable (must not be a vector)

Value

returns a numeric value representing the finite size correction or in case of fs.a0 the corrected value for a0.

References

For the original formula see Eq. (31) from hep-lat/0601033

Examples

Run this code
# NOT RUN {
fs.a0(a0=1., mps=0.123, L=24)
# }

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