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BHWIDE 1.00: O(alpha) YFS Exponentiated Monte Carlo for Bhabha Scattering at Wide Angles for LEP1/SLC and LEP2

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arxiv hep-ph/9608412 v1 pith:ZAWVMZRU submitted 1996-08-22 hep-ph

BHWIDE 1.00: O(alpha) YFS Exponentiated Monte Carlo for Bhabha Scattering at Wide Angles for LEP1/SLC and LEP2

S. Jadach (1 , 2) , W. Placzek (3) , B. F. L. Ward (3 , 4 , 2) ((1) Institute of Nuclear Physics , Cracow , Poland
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(2) CERN Theory Division Geneva Switzerland (3) The University of Tennessee Knoxville Tennessee USA (4) SLAC Stanford University Stanford California USA)
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classification hep-ph
keywords bhwidelep2precisionresultsalphabeenakkerbhabhacarlo
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present O(alpha) YFS exponentiated results for wide angle Bhabha scattering at LEP/SLC energies using a new Monte Carlo event generator BHWIDE 1.xx. Our calculations include two options for the pure weak corrections, as presented in Beenakker et al. and in Bohm et al. From comparison with the results of Beenakker et al., Montagna et al. and Cacciari et al., we conclude that the total precision of our BHWIDE results is 0.3% (0.5%) in the LEP1/SLC regime within +-100 MeV (+2.75/-2.5 GeV) of the Z peak. For LEP2, the corresponding precision is currently estimated at 1.5%; the latter could be improved if the data in LEP2 so require. Both precision tags represent clear improvements over what is currently available in the literature.

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