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Title: NNLO leptonic and hadronic corrections to Bhabha scattering and luminosity monitoring at meson factories
Authors: Calame, C. C.
Czyż, Henryk
Gluza, Janusz
Gunia, Michał
Montagna, G.
Nicrosini, O.
Piccinini, F.
Riemann, T.
Worek, M.
Keywords: NLO Computations; Electromagnetic Processes and Properties
Issue Date: 2011
Citation: Journal of High Energy Physics, No. 7 (2011), art. no. 126
Abstract: Virtual fermionic Nf = 1 and Nf = 2 contributions to Bhabha scattering are combined with realistic real corrections at next-to-next-to-leading order in QED. The virtual corrections are determined by the package bha nnlo hf, and real corrections with the Monte Carlo generators Bhagen-1Ph, Helac-Phegas and Ekhara. Numerical results are discussed at the energies of and with realistic cuts used at the factory DA NE, at the B factories PEP-II and KEK, and at the charm/ factory BEPC II.We compare these complete calculations with the approximate ones realized in the generator BabaYaga@NLO used at meson factories to evaluate their luminosities. For realistic reference event selections we nd agreement for the NNLO leptonic and hadronic corrections within 0.07% or better and conclude that they are well accounted for in the generator by comparison with the present experimental accuracy.
DOI: 10.1007/JHEP07(2011)126
ISSN: 1029-8479
Appears in Collections:Artykuły (WNŚiT)

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