Units

The 4D-TExS code uses megaelectronvolt (\(MeV\)) as the preferred unit. The table below contain the units used for all output quantities (if not specified, the quantity is dimensionless and has thus no unit). These units correspond to the dimension-full output, i.e., when the get_normalized switcher is set to false. When get_normalized is set to true, all thermodynamic quantities (and their associated errors) are normalized by the appropriate power of \(T\) and become dimensionless.

Variable	Unit
Temperature (\(T\))	MeV
Baryon chemical potential (\(\mu_B\))	MeV
Electric charge chemical potential (\(\mu_Q\))	MeV
Strange chemical potential (\(\mu_S\))	MeV
Pressure (\(P\))	MeV \(^4\)
Baryon density (\(n_B\))	MeV \(^3\)
Electric charge density (\(n_Q\))	MeV \(^3\)
Strangeness density (\(n_S\))	MeV \(^3\)
Entropy density (\(s\))	MeV \(^3\)
Energy density (\(\varepsilon\))	MeV \(^4\)
Baryon susceptibility (\(\chi_{BB}\))	MeV \(^2\)
Strangeness susceptibility (\(\chi_{SS}\))	MeV \(^2\)
Charge susceptibility (\(\chi_{QQ}\))	MeV \(^2\)
Baryon-strangeness susceptibility (\(\chi_{BS}\))	MeV \(^2\)
Baryon-charge susceptibility (\(\chi_{BQ}\))	MeV \(^2\)
Charge-strangeness susceptibility (\(\chi_{QS}\))	MeV \(^2\)
T-derivative of baryon density (\(dn_B/dT\))	MeV \(^2\)
T-derivative of strangeness density (\(dn_S/dT\))	MeV \(^2\)
T-derivative of charge density (\(dn_Q/dT\))	MeV \(^2\)
T-derivative of entropy density (\(ds/dT\))	MeV \(^2\)
Squared isentropic speed of sound (\(c_s^2\))	(dimensionless)

All associated errors (e.g. \(P_{err}\), \(n_B{}_{err}\), \(\chi_{BB\,err}\), …) share the same unit as their corresponding central-value quantity listed above.