http://hdl.handle.net/20.500.12128/9037
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. |
URI: | http://hdl.handle.net/20.500.12128/9037 |
DOI: | 10.1007/JHEP07(2011)126 |
ISSN: | 1029-8479 |
Appears in Collections: | Artykuły (WNŚiT) |
File | Description | Size | Format | |
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Calame_NNLO_leptonic_and_hadronic_corrections_to_Bhabha_scattering.pdf | 1,43 MB | Adobe PDF | View/Open |
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