Abstract.
Muon pair production through the radiative return is of importance for a measurement of the hadronic production cross section in two ways: it provides an independent calibration and it may give rise to an important background for the measurement of the pion form factor. With this motivation the Monte Carlo event generator PHOKHARA is extended to include next-to-leading order radiative corrections to the reaction \(e^ + e^-\to \mu^ + \mu^-\gamma\). Furthermore, virtual ISR corrections to FSR from pions are introduced, which extends the applicability of the generator into a new kinematical regime. Finally, the effect of photon vacuum polarization is introduced into this new version of the generator.
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Received: 8 April 2004, Revised: 3 December 2004, Published online: 25 January 2005
Work supported in part by BMBF under grant number 05HT9VKB0, EC 5th Framework Programme under contract HPRN-CT-2002-00311 (EURIDICE network), TARI project HPRI-CT-1999-00088, Polish State Committee for Scientific Research (KBN) under contract 2 P03B 017 24, BFM2002-00568, Generalitat Valenciana under grant GRUPOS03/013, and MCyT under grant FPA-2001-3031.
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Czyż, H., Grzelińska, A., Kühn, J.H. et al. Radiative return at \(\Phi\)- and B-factories: FSR for muon pair production at next-to-leading order. Eur. Phys. J. C 39, 411–420 (2005). https://doi.org/10.1140/epjc/s2004-02103-1
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DOI: https://doi.org/10.1140/epjc/s2004-02103-1