WG3 Report. Tau-Charm and Quarkonia Nora Brambilla, MJ. Matthias Jamin ICREA & IFAE Universitat Autònoma de Barcelona. WG3 Report. Matthias Jamin.

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1 WG3 Report - and Quarkonia Nora Brambilla, MJ ICREA & IFAE Universitat Autònoma de Barcelona 1

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4 Ultrasoft Renormalization of the potentials in NRQCD Maximilian in collaboration with André Max-Planck-Institut für Physik, München Maximilian EuroFlavour07 p. 1 4

5 ½ ½ ± ¼ ±µ for ¼ ½ ¼ ¾ Æ WG3 Report Status of Calculations / Summary Ultrasoft NLL running of the potentials Î Î, Ö Î, ¾ is essential for a precise prediction of Ø Øµ ØÓØ at threshold. usoft NNLL mixing contributions to ½ Î from Ö Î, ¾ already compensate a bit for the large usoft NNLL nonmixing contribution: What about Î (dominant at NLL)? w.i.p. Current status of the calculation: [«Ë «ÑÚµ, «Í «ÑÚ ¾ µ] Contribution order /«Ë Î Î Ö Î ¾ Î soft + usoft LL «Ë ÐÒ Úµ Ò, «Í ÐÒ Úµ Ò usoft NLL Ò Ò «Í «Í ÐÒ Úµ Ò 0 full usoft NLL «Í «Í ÐÒ Úµ Ò w.i.p. 0 soft NLL «Ë «Ë ÐÒ Úµ Ò Maximilian EuroFlavour07 p. 14 5

6 Finite lifetime effects in nonrelativistic top pair production Christoph Max-Planck-Institut für Physik, Munich in collaboration with André H. and Pedro Ruiz-Femenía EuroFlavour 07 Orsay Nov 2007 C. J. p.1 6

7 Summary Threshold scan allows for precise m t, y t, Γ t, α s determination Effective theory approach crucial to sum up threshold contributions Unstable top leads to Complex matching conditions UV phase space divergencies Matching conditions for the t t phase space that depend on definition of threshold top pair event Cutoff involves mild power counting breaking Phase space corrections are large (NLO) EuroFlavour 07 Orsay Nov 2007 C. J. p.17 7

8 The Yukawa Coupling at 500 GeV Cailin Measurement Motivation ILC at 500 GeV NLL QCD Polarization NLL EW Conclusion The Yukawa Coupling at 500 GeV Ø Cailin in collaboration with André Max-Planck-Institut für Physik, Munich ØÀ [hep-ph/ ], [hep-ph/ ] Orsay,

9 Conclusion The Yukawa Coupling at 500 GeV Cailin Measurement Motivation ILC at 500 GeV NLL QCD Polarization NLL EW Conclusion Yukawa coupling for test of EWSB ILC at 500 GeV: Phase space is non-relativistic vnrqcd Completed: Strong and electroweak matching conditions at O(NLL) Effects of e + e polarization Formula for the total cross section Increase of total cross section of up to 400% δy t /Y t 10 15% might be possible Work in progress: Electroweak NLL decay effects Phase space matching 9

10 Puzzles of excited charm meson masses In collaboration with Sunanda Banerjee, K. Shivaraj, A. Upadhyay, Physics Letters B 651, ,

11 1 α s and the τ hadronic width Work in process (progress?) with: Martin Beneke All results are preliminary! α s and τ hadronic width EuroFlavour 07, Orsay 11

12 Hadronic Decays of the TAU Lepton within RESONANCE CHIRAL THEORY (R ): EuroFlavour ' November 2007 Univ. Paris-Sud 11, Orsay Pablo Garcés Instituto de Física Corpuscular CSIC-UVEG València (Spain) 12

13 SUMMARY: Hadronic decays of the lepton Tools : PT, R T, Large N c (inspired) Previous work: Outlook : (h 1 h 2 h 3 ) (Gómez Dumm, Pich, Portolés 04) (Gómez Dumm, Pich, Portolés, R. 07 to appear) h 1 h 2 h 3 =3K, 2 2 EuroFlavour '07 FlaviAnet in R T Pablo Garcés Instituto de Física Corpuscular 13