PHOKHARA
    radiative return at flavour factories

Physics

Electron--positron annihilation into hadrons plus an energetic photon from initial state radiation (ISR) allows the hadronic cross-section to be measured over a wide range of energies at high luminosity flavour factories [DAPHNE, CESR, PEP-II, KEK-B].

Content

PHOKHARA is a Monte Carlo event generator which simulates this process at the next-to-leading order (NLO) accuracy. This includes virtual and soft photon corrections to one photon emission events and the emission of two real hard photons.

Downloads

VERSION 6.1 (January 2009): Includes KLOE parametrization for f0+sigma+double vector resonance contributions to FSR for two pions as described in
O. Shekhovtsova, G. Venanzoni, G. Pancheri, arXiv:0901.4440 [hep-ph]

  • source [.tar.gz]

    • VERSION 6.0 (December 2006): Lambda pair production added as new hadronic channel : e+e- → Λ (→ π- p) &Lambda (→ π+ p ) γ.

  • manual [Postscript, PDF], source [.tar.gz]

    6 Oct 2009: Warning, the program compiled with gfortran, the new GNU Fortran compiler which replaces g77 from version 4 of GCC, does not run correctly even if no errors/warnings are given during compilation and linking. We strongly recommend to use ifort from Intel.

    3 Dec 2007: bug on the two pion channel at line 994 corrected (LO FSR was switched off when vacuum polarization corrections are off). Do not affect previous versions.

    •  

    Forthcoming features
  • Full one-loop radiative corrections for muon production
  • Simulation of narrow resonances (J/ψ and ψ(2S))
  • Simulation of other exclusive hadronic channels
  • FSR for three pion production
    •  

    Previous versions

    VERSION 5.1 (July 2006): New parameters and functional form of the three-pion form factor.

  • manual [Postscript, PDF], source [.tar.gz]

    VERSION 5.0 (December 2005): Includes three-pion and kaon-pair production as new channels, and radiative phi decay contributions to the reaction e+e- → π+ π- γ, as well as a new pion form factor.

  • manual [Postscript, PDF], source [.tar.gz]

    VERSION 4.0 (April 2004): Incorporates nucleon pair production (proton-antiproton and neutron-antineutron) as new channels. FSR at NLO for muon pair production added, with some improvements in the pion pair channel. Effect of vacuum polarization implemented.

  • manual [Postscript, PDF], source [uuencoded]

    VERSION 3.0 (August 2003): simulates ISR at NLO for two charged pions or muons, and four-pion channels, and FSR at leading order for two charged pions or muons. FSR at NLO for two charged pions added.

  • manual [Postscript, PDF], source [uuencoded]

    VERSION 2.0 (December 2002): includes small angle photon generation, four-pion channels and FSR at leading order for two charged pions or muons.

  • manual [Postscript, PDF], source [uuencoded]

    VERSION 1.0 (December 2001): includes ISR only and is limited to two charged pions or muons together with one or two hard photons as final states.

  • manual [Postscript, PDF], source [uuencoded]

    EVA: simulates two pion events and includes ISR, FSR, and their interference at the leading order (LO), and the dominant radiative corrections from additional collinear radiation through structure function techniques.

  • manual [Postscript, PDF], source [uuencoded]

    • References
  • PHOKHARA 6.0:
    H. Czyż, A. Grzelińska, J.H. Kühn,
    Phys.Rev.D75(2007)074026 [hep-ph/0702122].
  • PHOKHARA 5.0:
    H. Czyż, A. Grzelińska, J.H. Kühn, G. Rodrigo,
    Eur.Phys.J.C47(2006)617 [hep-ph/0512180].
    H. Czyż, A. Grzelińska, J.H. Kühn,
    Phys.Lett.B611(2005)116 [hep-ph/0412239].
  • PHOKHARA 4.0:
    H. Czyż, A. Grzelińska, J.H. Kühn, G. Rodrigo,
    Eur.Phys.J.C39(2005)411 [hep-ph/0404078].
    H. Czyż, J.H. Kühn, E. Nowak, G. Rodrigo,
    Eur.Phys.J.C35(2004)527 [hep-ph/0403062].
  • PHOKHARA 3.0:
    H. Czyż, A. Grzelińska, J.H. Kühn, G. Rodrigo,
    Eur.Phys.J.C33(2004)333 [hep-ph/0308312].
  • PHOKHARA 2.0:
    H. Czyż, A. Grzelińska, J.H. Kühn, G. Rodrigo,
    Eur.Phys.J.C27(2003)563 [hep-ph/0212225].
    J.H. Kühn, G. Rodrigo,
    Eur.Phys.J.C25(2002)215 [hep-ph/0204283].
  • PHOKHARA 1.0:
    G. Rodrigo, H. Czyż, J.H. Kühn, M. Szopa,
    Eur.Phys.J.C24(2002)71 [hep-ph/0112184].
    G. Rodrigo, A. Gehrmann-De Ridder, M. Guilleaume, J.H. Kühn, Eur.Phys.J.C22(2001)81 [hep-ph/0106132].
  • EVA:
    S. Binner, J.H. Kühn and K. Melnikov,
    Phys.Lett.B459(1999)279 [hep-ph/9902399].
  • EVA-4pi:
    H. Czyż and J.H. Kühn,
    Eur.Phys.J.C18(2001)497 [hep-ph/0008262].
  • Further reading:
    H. Czyż, Nucl.Phys.Proc.Suppl.162(2006)76 [ hep-ph/0606227].
    [hep-ph/0412239].
    H. Czyż, A. Grzelińska, E. Nowak-Kubat,
    Acta Phys.Polon.B36(2005)3403 [hep-ph/0510208];
    H. Czyż and E. Nowak-Kubat,
    Acta Phys.Polon.B36(2005)3425 [hep-ph/0510287];
    Acta Phys.Polon.B34(2003)5231 [hep-ph/0310335].
    H. Czyż, A. Grzelińska,
    eConf C0309101(2003)FRWP007 [hep-ph/0402030];
    Acta Phys.Polon.B34(2003)5219 [hep-ph/0310341].
    H. Czyż, A. Grzelińska, J.H. Kühn, G. Rodrigo, Nucl.Phys.Proc.Suppl.131(2004)39 [hep-ph/0312217].
    G. Rodrigo, H. Czyż, J.H. Kühn, hep-ph/0205097;
    Nucl.Phys.Proc.Suppl.123(2003)167     [hep-ph/0210287];
    Nucl.Phys.Proc.Suppl.116(2003)249     [hep-ph/0211186].
    G. Rodrigo, hep-ph/0311158;
    Acta Phys.Polon.B32(2001)3833 [hep-ph/0111151].
    J.H. Kühn, Nucl.Phys.Proc.Suppl.144(2005)214
    Nucl.Phys.Proc.Suppl.98(2001)289 [hep-ph/0101100].
    • © Last updated 16 April 2009
    http://ific.uv.es/~rodrigo/phokhara     		German.Rodrigo@cern.ch