python.samplers.ERapMPhiSampler Class Reference

Inheritance diagram for python.samplers.ERapMPhiSampler:

Collaboration diagram for python.samplers.ERapMPhiSampler:

Public Member Functions
def	__init__ (self, energy, rap, mass=0.0, phi=[0, TWOPI])
def	energy (self)
def	energy (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
	energy
	rap
	mass
	phi

Private Attributes
	_e
	_rap
	_m
	_phi

Detailed Description

Definition at line 497 of file samplers.py.

Constructor & Destructor Documentation

__init__()

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

Definition at line 502 of file samplers.py.

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

energy() [1/2]

def python.samplers.ERapMPhiSampler.energy

(

self

)

Definition at line 509 of file samplers.py.

    def energy(self):
        "Energy sampler"
        return self._e

energy() [2/2]

def python.samplers.ERapMPhiSampler.energy	(		self,
			x
	)

Definition at line 513 of file samplers.py.

    def energy(self, x):
        self._e = mksampler(x)
 

mass() [1/2]

def python.samplers.ERapMPhiSampler.mass

(

self

)

Definition at line 525 of file samplers.py.

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

mass() [2/2]

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

Definition at line 529 of file samplers.py.

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

phi() [1/2]

def python.samplers.ERapMPhiSampler.phi

(

self

)

Definition at line 533 of file samplers.py.

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

phi() [2/2]

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

Definition at line 537 of file samplers.py.

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

rap() [1/2]

def python.samplers.ERapMPhiSampler.rap

(

self

)

Definition at line 517 of file samplers.py.

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

rap() [2/2]

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

Definition at line 521 of file samplers.py.

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

shoot()

def python.samplers.ERapMPhiSampler.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 540 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)
        """
        e = max(self.mass(),self.energy())
        y = self.rap()
        sqrt_pt2_m2 = e / math.cosh(y)
        pz = sqrt_pt2_m2 * math.sinh(y)
        m = self.mass()
        pt = math.sqrt( sqrt_pt2_m2**2 - m**2 )
        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

_e

python.samplers.ERapMPhiSampler._e

private

Definition at line 514 of file samplers.py.

_m

python.samplers.ERapMPhiSampler._m

private

Definition at line 530 of file samplers.py.

_phi

python.samplers.ERapMPhiSampler._phi

private

Definition at line 538 of file samplers.py.

_rap

python.samplers.ERapMPhiSampler._rap

private

Definition at line 522 of file samplers.py.

energy

python.samplers.ERapMPhiSampler.energy

Definition at line 503 of file samplers.py.

mass

python.samplers.ERapMPhiSampler.mass

Definition at line 505 of file samplers.py.

phi

python.samplers.ERapMPhiSampler.phi

Definition at line 506 of file samplers.py.

rap

python.samplers.ERapMPhiSampler.rap

Definition at line 504 of file samplers.py.

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

• samplers.py