Status and accuracy of the Monte Carlo generators for luminosity measurements
The status and accuracy of the precision Monte Carlo generators used for luminosity measurements at flavour factories is reviewed.It is shown that,thanks to a considerable,long-term effort in tuned comparisons between the predictions of independent programs,as well as in the validation of the generators against the presently available calculations of the next-to-next-to-leading order QED corrections to Bhabha scattering,the theoretical accuracy reached by the most precise tools is of about one per mille.This error estimate is valid for realistic experimental cuts,appears to be quite robust and is already sufficient for very accurate luminosity measurements.However,recent progress and possible advances to further improve it are also discussed.
Luminosity QED Bhabha scattering radiative corrections Monte Carlo NNLO calculations
G.Montagna G.Balossini C.Bignamini C.M.Carloni Calame O.Nicrosini F.Piccinini
Dipartimento di Fisica Nucleate e Teorica,Università di Pavia,Pavia,27100,Italy;Istituto Nazionale d School of Physics & Astronomy,University of Southampton,Southampton SO17 1BJ,U.K. Istituto Nazionale di Fisica Nucleate,Sezione di Pavia,Pavia,27100,Italy
国际会议
北京
英文
883-888
2009-10-13（万方平台首次上网日期，不代表论文的发表时间）