# !/usr/bin/env python3
##########################################################################
# basf2 (Belle II Analysis Software Framework) #
# Author: The Belle II Collaboration #
# #
# See git log for contributors and copyright holders. #
# This file is licensed under LGPL-3.0, see LICENSE.md. #
##########################################################################
"""
Functions that work on photon lists.
"""
from basf2 import create_path
import string
import random
import modularAnalysis as ma
def getRandomId(size=6, chars=string.ascii_uppercase + string.digits):
return ''.join(random.choice(chars) for _ in range(size))
[docs]def writeClosestParticleExtraClusterInfo(
particleList,
particleSelection='True',
roe_path=None,
deadend_path=None,
path=None
):
"""
Add various variables to the first particle that are related to their angular separation and kinematics.
@param particleList Particle list with particle candidates that will have the extra information in the end
@param particleSelection Selection for the other particle
@param roe_path a path for the rest of event to be executed
@param deadend_path a path for skipping irrelevant RestOfEvent objects that may exist (if this was called twice, for instance)
@param path modules are added to this path
"""
particleType = particleList.split(":")[0]
if not roe_path:
roe_path = create_path()
if not deadend_path:
deadend_path = create_path()
# build rest of event
ma.buildRestOfEvent(particleList, path=path)
# get random listnames (in case we run this function multiple times)
pListPair = 'vpho:writeClosestParticleExtraClusterInfo' + getRandomId()
pList0 = particleType + ':writeClosestParticleExtraClusterInfo' + getRandomId()
pList1 = particleType + ':writeClosestParticleExtraClusterInfo' + getRandomId()
ma.signalSideParticleFilter(particleList, '', roe_path, deadend_path)
ma.fillSignalSideParticleList(pList0, '^' + particleList, path=roe_path)
ma.fillParticleList(pList1, 'isInRestOfEvent == 1 and ' + particleSelection, path=roe_path)
ma.reconstructDecay(pListPair + ' -> ' + pList0 + ' ' + pList1, '', path=roe_path)
# only keep the one with the smallest opening angle
ma.rankByLowest(pListPair, 'daughterClusterAngleInBetween(0, 1)', 1, path=roe_path)
# add new variables to the signal side particle
# NOTE: if somebody needs these variables in the CMS frame, they need to
# modify this function since it's not possible outside the roe_path
ma.variableToSignalSideExtraInfo(pListPair, {'useLabFrame(daughterClusterAngleInBetween(0, 1))': 'openingAngle'}, path=roe_path)
ma.variableToSignalSideExtraInfo(pListPair, {'useLabFrame(daughterDiffOf(0, 1, clusterTheta))': 'deltaTheta'}, path=roe_path)
ma.variableToSignalSideExtraInfo(pListPair, {'useLabFrame(daughterDiffOfClusterPhi(0, 1))': 'deltaPhi'}, path=roe_path)
path.for_each('RestOfEvent', 'RestOfEvents', roe_path)
