Multiphoton Monte Carlo event generator for Bhabha scattering at small angles

Journal Article · Thu Nov 30 23:00:00 EST 1989 · Physical Review (Section) D: Particles and Fields; (USA)

DOI:https://doi.org/10.1103/PhysRevD.40.3582· OSTI ID:7273822

Jadach, S ^[1]; Ward, B F.L. ^[2]

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1. Institute of Physics, Jagellonian University, Cracow, Poland (PL) CERN, CH-1211, Geneva 23, (Switzerland) SLAC, P.O. Box 4349, Stanford, California 94309 (USA)
2. Department of Physics and Astronomy The University of Tennessee, Knoxville, Tennessee 37996-1200 SLAC, P.O. Box 4349, Stanford, California 94309 (USA)

We describe in this paper the application of the theory of Yennie, Frautschi, and Suura (YFS) to construct a Monte Carlo (MC) event generator with multiple-photon production for Bhabha scattering at low angles. The respective generator provides the four-momenta of the electron and positron and of all soft and hard photons with a proper treatment of the phase space and conservation of the total four-momentum. The final-state electron and positron are assumed to be visible above some minimum angle with respect to the beams (double tag). The QED matrix element in the algorithm is taken according to the YFS exponentiation scheme. The Monte Carlo program will be helpful in luminosity determination at experiments at the SLAC Linear Collider and the CERN collider LEP; it takes into account QED {ital O}({alpha}) and the leading higher-order corrections. The important difference with the existing MC procedures is that the minimum energy above which photons are generated may be set arbitrarily low. Sample Monte Carlo data are illustrated in our discussion.

• OSTI ID: 7273822
• Journal Information: Physical Review (Section) D: Particles and Fields; (USA), Journal Name: Physical Review (Section) D: Particles and Fields; (USA) Vol. 40:11; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

645202* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATOR FACILITIES
ACCELERATORS
ANGULAR DISTRIBUTION
BHABHA SCATTERING
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ELECTRODYNAMICS
ELEMENTARY PARTICLES
FIELD THEORIES
LEP STORAGE RINGS
LINEAR ACCELERATORS
MASSLESS PARTICLES
MATHEMATICAL SPACE
MATRIX ELEMENTS
MONTE CARLO METHOD
MULTIPLE PRODUCTION
PARTICLE PRODUCTION
PHASE SPACE
PHOTONS
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
SCATTERING
SPACE
STANFORD LINEAR COLLIDER
STORAGE RINGS
TOTAL CROSS SECTIONS