PtEtaPhiELorentzVector

class coffea.nanoevents.methods.vector.PtEtaPhiELorentzVector[source]

Bases: LorentzVector, SphericalThreeVector

A Lorentz vector using pseudorapidity and energy

This mixin class requires the parent class to provide items pt, eta, phi, and energy. Some additional properties are overridden for performance

Attributes Summary

`E`	Alias for `t`
`energy`	Alias for `t`
`eta`	Pseudorapidity
`phi`	Azimuthal angle relative to X axis in XY plane
`pt`	Alias for `r`
`r`	Distance from origin in XY plane
`rho`	Distance from origin in 3D
`rho2`	Squared `rho`
`t`	Cartesian time component
`theta`	Inclination angle from XY plane
`z`	Cartesian z value

Methods Summary

`multiply`(other)	Multiply this vector by a scalar elementwise using `x`, `y`, `z`, and `t` components
`negative`()	Returns the negative of the vector

Attributes Documentation

E: Alias for t

energy: Alias for t

eta

Pseudorapidity

\(-\ln\tan(\theta/2) = \text{arcsinh}(z/r)\)

phi

Azimuthal angle relative to X axis in XY plane

\(\text{arctan2}(y, x)\)

pt: Alias for r

Distance from origin in XY plane

\(\sqrt{x^2+y^2} = \rho \sin(\theta)\)

rho

Distance from origin in 3D

\(\sqrt{x^2+y^2+z^2} = \sqrt{r^2+z^2}\)

rho2: Squared rho

Cartesian time component

\(\sqrt{\rho^2+m^2}\)

theta

Inclination angle from XY plane

\(\text{arctan2}(r, z) = 2\text{arctan}(e^{-\eta})\)

Cartesian z value

\(r \sinh(\eta)\)

Methods Documentation

multiply(other)[source]

Multiply this vector by a scalar elementwise using x, y, z, and t components

In reality, this directly adjusts pt, eta, phi and energy for performance

negative()[source]: Returns the negative of the vector