Safe Haskell	Safe-Infered

Data.LHA

Description

This module provides data structures for HEP events, as outlined by the Les Houches Accord (hep-ph/0109068v1). It attempts to be as close as possible to a direct haskell translation of the accord. Other relevant documents include:

L. Garren, I. G. Knowles, T. Sjostrand and T. Trippe, Eur. Phys. J. C 15, 205 (2000).
H. Plothow-Besch, Comput. Phys. Commun. 75, 396 (1993); CERN Program Library Long Writeup W5051 (2000); refer to http://consult.cern.ch/writeup/pdflib/.

Synopsis

Documentation

data Event Source

Describes a generated event.

Constructors

Event
Fields nPart :: Int The number of particles in this event. evProcId :: Int The ID of the subprocess used to generate this event. evWeight :: Double scale :: Double The scale of the event, in GeV. aQED :: Double aQCD :: Double parts :: [Particle]

data Run Source

Describes the properties of an event generation run. Note that this data structure does not contain the generated event information.

Constructors

Run
Fields runBeam :: (Beam, Beam) The properties of the two beams being used in this run. idwt :: Int Switch dictating how the event weights are to be interpreted. nProc :: Int The number of different subprocesses being used. procs :: [Subprocess] List of all subprocesses being used.

data Beam Source

Represents the properties of a single beam particle.

Constructors

Beam
Fields beamPDG :: Int ID of the beam particle according to the Particle Data Group convention. beamE :: Double Energy in GeV of the beam particle. pdfg :: Int Author group for the beam, according to the Cernlib PDFlib specification. pdfs :: Int PDF set ID for the beam, according to the Cernlib PDFlib specification.

data Subprocess Source

Describes the properties of a subprocess.

Constructors

Subprocess
Fields procXSec :: Double The cross-section of this subprocess, in pb. procXErr :: Double The statistical error associated with the value of procXSec. procXMax :: Double procId :: Int

data Particle Source

Describes a single particle component of a generated event.

Constructors

Particle
Fields partPDG :: Int ID of the particle according to the Particle Data Group convention. status :: ParticleStatus Status code of the particle. mothers :: MaybePair Int The mother particles. iColor :: (Int, Int) partPx :: Double partPy :: Double partPz :: Double partE :: Double partM :: Double lifetime :: Double The lifetime of the particle, in mm. spin :: Double

data ParticleStatus Source

Status codes for particles.

Constructors

Incoming	Corresponds to status code -1.
OutgoingFinal	Corresponds to status code +1.
IntermediateSpaceLike	Corresponds to status code -2.
IntermediateResonance	Corresponds to status code +2.
DocumentationOnly	Corresponds to status code +3.
IncomingBeam	Corresponds to status code -9.

statusToInt :: Num a => ParticleStatus -> aSource

statusFromInt :: (Eq a, Num a) => a -> ParticleStatus Source

data MaybePair a Source

Constructors

PZero
POne a
PBoth (a, a)