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Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data |
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| Authors: | S Actis A Arbuzov G Balossini P Beltrame C Bignamini R Bonciani C M Carloni Calame V Cherepanov M Czakon H Czy? A Denig S Eidelman G V Fedotovich A Ferroglia J Gluza A Grzelińska M Gunia A Hafner F Ignatov S Jadach F Jegerlehner A Kalinowski W Kluge A Korchin J H Kühn E A Kuraev P Lukin P Mastrolia G Montagna S E Müller F Nguyen O Nicrosini D Nomura G Pakhlova G Pancheri M Passera A Penin F Piccinini W P?aczek T Przedzinski E Remiddi T Riemann G Rodrigo P Roig O Shekhovtsova C P Shen A L Sibidanov T Teubner L Trentadue G Venanzoni J J van der Bij P Wang B F L Ward Z Was M Worek C Z Yuan |
| Institution: | 38. Paul Scherrer Institut, Würenlingen and Villigen, 5232, Villigen PSI, Switzerland 9. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980, Dubna, Russia 32. Dipartimento di Fisica Nucleare e Teorica, Università di Pavia, 27100, Pavia, Italy 33. INFN, Sezione di Pavia, 27100, Pavia, Italy 13. Physics Department, CERN, 1211, Genève, Switzerland 15. Laboratoire de Physique Subatomique et de Cosmologie, Université Joseph Fourier/CNRS-IN2P3/INPG, 38026, Grenoble, France 35. School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK 25. Budker Institute of Nuclear Physics, 630090, Novosibirsk, Russia 26. Novosibirsk State University, 630090, Novosibirsk, Russia 1. Institut für Theoretische Physik E, RWTH Aachen Universit?t, 52056, Aachen, Germany 19. Institute of Physics, University of Silesia, 40007, Katowice, Poland 22. Institut für Kernphysik, Johannes Gutenberg-Universit?t Mainz, 55128, Mainz, Germany 23. Institut für Physik (THEP), Johannes Gutenberg-Universit?t, 55099, Mainz, Germany 8. Institute of Nuclear Physics Polish Academy of Sciences, 31342, Cracow, Poland 3. Institut für Physik Humboldt-Universit?t zu Berlin, 12489, Berlin, Germany 41. Deutsches Elektronen-Synchrotron, DESY, 15738, Zeuthen, Germany 29. LLR-Ecole Polytechnique, 91128, Palaiseau, France 17. Institut für Experimentelle Kernphysik, Universit?t Karlsruhe, 76021, Karlsruhe, Germany 20. National Science Center “Kharkov Institute of Physics and Technology”, 61108, Kharkov, Ukraine 18. Institut für Theoretische Teilchenphysik, Universit?t Karlsruhe, 76128, Karlsruhe, Germany 14. Theory Department, CERN, 1211, Genève, Switzerland 34. Dipartimento di Fisica dell’Università “Roma Tre” and INFN Sezione di Roma Tre, 00146, Rome, Italy 36. Theory Center, KEK, Tsukuba, Ibaraki, 305-0801, Japan 24. Institute for Theoretical and Experimental Physics, Moscow, Russia 11. Laboratori Nazionali di Frascati dell’INFN, 00044, Frascati, Italy 28. INFN, Sezione di Padova, 35131, Padova, Italy 10. Department of Physics, University of Alberta, Edmonton, AB, T6G 2J1, Canada 7. Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059, Cracow, Poland 6. The Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Reymonta 4, 30-059, Cracow, Poland 4. Dipartimento di Fisica dell’Università di Bologna, 40126, Bologna, Italy 5. INFN, Sezione di Bologna, 40126, Bologna, Italy 37. Instituto de Fisica Corpuscular (IFIC), Centro mixto UVEG/CSIC, Edificio Institutos de Investigacion, Apartado de Correos 22085, 46071, Valencia, Spain 27. Laboratoire de Physique Théorique (UMR 8627), Université de Paris-Sud XI, Batiment 210, 91405, Orsay Cedex, France 16. University of Hawaii, Honolulu, HI, 96822, USA 21. Department of Mathematical Sciences, University of Liverpool, Liverpool, L69 3BX, UK 30. Dipartimento di Fisica, Università di Parma, 43100, Parma, Italy 31. INFN, Gruppo Collegato di Parma, 43100, Parma, Italy 12. Physikalisches Institut, Albert-Ludwigs-Universit?t Freiburg, 79104, Freiburg, Germany 2. Institue of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China 39. Department of Physics, Baylor University, Waco, TX, 76798-7316, USA 40. Fachbereich C, Bergische Universit?t Wuppertal, 42097, Wuppertal, Germany |
| Abstract: | We present the achievements of the last years of the experimental and theoretical groups working on hadronic cross section measurements at the low-energy e + e ? colliders in Beijing, Frascati, Ithaca, Novosibirsk, Stanford and Tsukuba and on τ decays. We sketch the prospects in these fields for the years to come. We emphasise the status and the precision of the Monte Carlo generators used to analyse the hadronic cross section measurements obtained as well with energy scans as with radiative return, to determine luminosities and τ decays. The radiative corrections fully or approximately implemented in the various codes and the contribution of the vacuum polarisation are discussed. |
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