Struct VertexView 

pub struct VertexView<'a> { /* private fields */ }

Read-only access to channel expressions evaluated in a vertex rest frame.

Implementations

impl<'a> VertexView<'a>

pub fn vertex(&self) -> &'a Vertex

Return the underlying vertex definition.

Panics

Panics if the vertex associated with this view is missing from the channel.

pub fn p4(&self, edge: &str) -> LadduPhysicsResult<Vec4>

Construct an edge four-momentum boosted into this vertex’s rest frame.

Errors

Returns LadduPhysicsError when the edge, frame path, or required momenta cannot be resolved.

pub fn vec3(&self, edge: &str) -> LadduPhysicsResult<Vec3>

Construct an edge three-momentum in this vertex’s rest frame.

Errors

Returns LadduPhysicsError when the edge’s rest-frame momentum cannot be resolved.

pub fn costheta( &self, edge: &str, z_axis: Vec3, _y_hint: Vec3, ) -> LadduPhysicsResult<Expr>

Construct the cosine of an edge’s polar angle about the supplied axis.

Errors

Returns LadduPhysicsError when the edge’s rest-frame momentum cannot be resolved.

pub fn theta( &self, edge: &str, z_axis: Vec3, y_hint: Vec3, ) -> LadduPhysicsResult<Expr>

Construct an edge’s polar angle about the supplied axis.

Errors

Returns LadduPhysicsError when the edge’s rest-frame momentum cannot be resolved.

pub fn phi( &self, edge: &str, z_axis: Vec3, y_hint: Vec3, ) -> LadduPhysicsResult<Expr>

Construct an edge’s azimuthal angle in the supplied coordinate frame.

Errors

Returns LadduPhysicsError when the edge’s rest-frame momentum cannot be resolved.

pub fn mandelstam(&self, channel: MandelstamChannel) -> LadduPhysicsResult<Expr>

Construct one of the Mandelstam invariants for a two-to-two vertex.

Errors

Returns LadduPhysicsError when this is not a two-to-two vertex or the required edge momenta cannot be resolved.

pub fn s(&self) -> LadduPhysicsResult<Expr>

Construct the Mandelstam s invariant.

Errors

Returns LadduPhysicsError when this is not a two-to-two vertex or the required edge momenta cannot be resolved.

pub fn t(&self) -> LadduPhysicsResult<Expr>

Construct the Mandelstam t invariant.

Errors

Returns LadduPhysicsError when this is not a two-to-two vertex or the required edge momenta cannot be resolved.

pub fn u(&self) -> LadduPhysicsResult<Expr>

Construct the Mandelstam u invariant.

Errors

Returns LadduPhysicsError when this is not a two-to-two vertex or the required edge momenta cannot be resolved.

Trait Implementations

impl<'a> Clone for VertexView<'a>

fn clone(&self) -> VertexView<'a>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for VertexView<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.