python.samplers.PtRapMPhiSampler Class Reference

Inheritance diagram for python.samplers.PtRapMPhiSampler:

Collaboration diagram for python.samplers.PtRapMPhiSampler:

Public Member Functions
def	__init__ (self, pt, rap, mass=0.0, phi=[0, TWOPI])
def	pt (self)
def	pt (self, x)
def	rap (self)
def	rap (self, x)
def	mass (self)
def	mass (self, x)
def	phi (self)
def	phi (self, x)
def	shoot (self)
def	__call__ (self)

Public Attributes
	pt
	rap
	mass
	phi

Private Attributes
	_pt
	_rap
	_m
	_phi

Detailed Description

Definition at line 684 of file samplers.py.

Constructor & Destructor Documentation

__init__()

def python.samplers.PtRapMPhiSampler.__init__	(		self,
			pt,
			rap,
			mass = 0.0,
			phi = [0, TWOPI]
	)

Definition at line 687 of file samplers.py.

    def __init__(self, pt, rap, mass=0.0, phi=[0, TWOPI]):
        self.pt = pt
        self.rap = rap
        self.mass = mass
        self.phi = phi
 

Member Function Documentation

__call__()

def python.samplers.Sampler.__call__ (   self )

inherited

This is the call method that will actually be used (so that normal
functions can also be passed in as samplers).

Definition at line 17 of file samplers.py.

    def __call__(self):
        """This is the call method that will actually be used (so that normal
        functions can also be passed in as samplers)."""
        return self.shoot()
 

mass() [1/2]

def python.samplers.PtRapMPhiSampler.mass

(

self

)

Definition at line 710 of file samplers.py.

    def mass(self):
        "Mass sampler"
        return self._m

mass() [2/2]

def python.samplers.PtRapMPhiSampler.mass	(		self,
			x
	)

Definition at line 714 of file samplers.py.

    def mass(self, x):
        self._m = mksampler(x)
 

phi() [1/2]

def python.samplers.PtRapMPhiSampler.phi

(

self

)

Definition at line 718 of file samplers.py.

    def phi(self):
        "Azimuthal angle sampler"
        return self._phi

phi() [2/2]

def python.samplers.PtRapMPhiSampler.phi	(		self,
			x
	)

Definition at line 722 of file samplers.py.

    def phi(self, x):
        self._phi = mksampler(x)
 

pt() [1/2]

def python.samplers.PtRapMPhiSampler.pt

(

self

)

Definition at line 694 of file samplers.py.

    def pt(self):
        "Transverse momentum sampler"
        return self._pt

pt() [2/2]

def python.samplers.PtRapMPhiSampler.pt	(		self,
			x
	)

Definition at line 698 of file samplers.py.

    def pt(self, x):
        self._pt = mksampler(x)
 

rap() [1/2]

def python.samplers.PtRapMPhiSampler.rap

(

self

)

Definition at line 702 of file samplers.py.

    def rap(self):
        "Rapidity sampler"
        return self._rap

rap() [2/2]

def python.samplers.PtRapMPhiSampler.rap	(		self,
			x
	)

Definition at line 706 of file samplers.py.

    def rap(self, x):
        self._rap = mksampler(x)
 

shoot()

def python.samplers.PtRapMPhiSampler.shoot

(

self

)

y = 0.5 * ln((E+pz)/(E-pz))
-> (E^2 - pz^2) exp(2y) = (E+pz)^2
 & (E^2 - pz^2) exp(-2y) = (E-pz)^2
-> E = sqrt(pt^2 + m^2) cosh(y)
-> pz = sqrt(pt^2 + m^2) sinh(y)
-> sqrt(pt^2 + m^2) = E / cosh(y)

Reimplemented from python.samplers.Sampler.

Definition at line 725 of file samplers.py.

    def shoot(self):
        """
        y = 0.5 * ln((E+pz)/(E-pz))
        -> (E^2 - pz^2) exp(2y) = (E+pz)^2
         & (E^2 - pz^2) exp(-2y) = (E-pz)^2
        -> E = sqrt(pt^2 + m^2) cosh(y)
        -> pz = sqrt(pt^2 + m^2) sinh(y)
        -> sqrt(pt^2 + m^2) = E / cosh(y)
        """
        pt = self.pt()
        assert pt >= 0
        m = self.mass()
        assert m >= 0
        sqrt_pt2_m2 = math.sqrt( pt**2 + m**2 )
        y = self.rap()
        e = sqrt_pt2_m2 * math.cosh(y)
        pz = sqrt_pt2_m2 * math.sinh(y)
        phi = self.phi()
        px = pt * math.cos(phi)
        py = pt * math.sin(phi)
        v4 = ROOT.TLorentzVector(px, py, pz, e)
        return v4
 
 

Member Data Documentation

_m

python.samplers.PtRapMPhiSampler._m

private

Definition at line 715 of file samplers.py.

_phi

python.samplers.PtRapMPhiSampler._phi

private

Definition at line 723 of file samplers.py.

_pt

python.samplers.PtRapMPhiSampler._pt

private

Definition at line 699 of file samplers.py.

_rap

python.samplers.PtRapMPhiSampler._rap

private

Definition at line 707 of file samplers.py.

mass

python.samplers.PtRapMPhiSampler.mass

Definition at line 690 of file samplers.py.

phi

python.samplers.PtRapMPhiSampler.phi

Definition at line 691 of file samplers.py.

pt

python.samplers.PtRapMPhiSampler.pt

Definition at line 688 of file samplers.py.

rap

python.samplers.PtRapMPhiSampler.rap

Definition at line 689 of file samplers.py.

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The documentation for this class was generated from the following file:

• samplers.py