The "tree" CKM parameterizations that is used by wilson uses the Unitarity Triangle (UT) angle $\gamma$ to determine the CKM phase $\delta$. Since $\delta=\gamma$ is a very accurate approximation, so far $\delta$ was set to $\gamma$ everywhere in wilson and the parameter corresponding to the angle $\gamma$ has been called delta. This is changed by the present PR, which now distinguishes $\gamma$ and $\delta$ and uses the name gamma for the UT angle $\gamma$.
This change is motivated by the implementation of the exact relation between $\gamma$ and $\delta$ in the ckmutil package in PR https://github.com/DavidMStraub/ckmutil/pull/4.
Codes that update wilson's default CKM parameters currently update the value of the parameter delta and not gamma. To preserve backward compatibility, this PR introduces a temporary fix that sets the parameter gamma to the value of the parameter delta in case the parameters option is set on the Wilson class.
The "tree" CKM parameterizations that is used by
wilson
uses the Unitarity Triangle (UT) angle $\gamma$ to determine the CKM phase $\delta$. Since $\delta=\gamma$ is a very accurate approximation, so far $\delta$ was set to $\gamma$ everywhere inwilson
and the parameter corresponding to the angle $\gamma$ has been calleddelta
. This is changed by the present PR, which now distinguishes $\gamma$ and $\delta$ and uses the namegamma
for the UT angle $\gamma$. This change is motivated by the implementation of the exact relation between $\gamma$ and $\delta$ in theckmutil
package in PR https://github.com/DavidMStraub/ckmutil/pull/4.Codes that update
wilson
's default CKM parameters currently update the value of the parameterdelta
and notgamma
. To preserve backward compatibility, this PR introduces a temporary fix that sets the parametergamma
to the value of the parameterdelta
in case theparameters
option is set on theWilson
class.