WG3 Report Matthias Jamin WG3 Report Tau-Charm and Quarkonia Nora Brambilla, MJ Top Hoang Scimemi Stahlhofen Reißer Farrell Charm Ananthanarayan Tau Jamin Roig Matthias Jamin ICREA & IFAE Universitat Autònoma de Barcelona 1
WG3 Report Matthias Jamin �������������������������� Top Hoang ������������������������� Scimemi Stahlhofen Reißer Farrell Charm Ananthanarayan �������������� Tau Jamin Roig �������������������������������� ������ ��������� ����� �!���"���������#"�$�%�����&���"����"��'��(�')*+*,-*+ ���������������������������������������$�%�����&���"����"����.�/�*+*0�,120���������������������� ����� �!���"���������#"�$�%�����&���"����"����.�/�*+*0�-*+0 �������������������������������������� 2
WG3 Report Matthias Jamin Top Hoang Scimemi Stahlhofen Reißer Farrell Charm Ananthanarayan Tau Jamin Roig 3
WG3 Report Matthias Jamin Ultrasoft Renormalization of the Top Hoang potentials in NRQCD Scimemi Stahlhofen Reißer Farrell Maximilian Stahlhofen Charm Ananthanarayan Tau Jamin in collaboration with Andr´ e Hoang Roig Max-Planck-Institut f¨ ur Physik, M¨ unchen Maximilian Stahlhofen – EuroFlavour07 – p. 1 4
WG3 Report � Ultrasoft NLL running of the potentials V V V Matthias Jamin k , r , 2 is essential for a precise + � Status of Calculations / Summary � � ( e e ! t t ) at threshold. tot � usoft NNLL mixing contributions to V V 1 from r , 2 already compensate a prediction of Æ = ( � 1 : 9 % ; � 0 : 5 %) for � = 0 : 1 ; 0 : 2 1 Top Hoang � What about V � ! k (dominant at NLL)? Scimemi bit for the large usoft NNLL nonmixing contribution: Stahlhofen 2 Reißer � Current status of the calculation: � = � s ( mv ) , � = � s ( mv ) ] S U Farrell Charm order / � w.i.p. V V V V S k r 2 s Ananthanarayan n , n ( � ln v ) ( � ln v ) X X X X Tau S U Jamin [ n n n � ( � ln v ) X X X f f U U Roig n Contribution � ( � ln v ) X X U U n soft + usoft LL � ( � ln v ) X S S usoft NLL 0 full usoft NLL 0 w.i.p. soft NLL – – – Maximilian Stahlhofen – EuroFlavour07 – p. 14 5
WG3 Report Matthias Jamin Top Finite lifetime effects in nonrelativistic Hoang Scimemi top pair production Stahlhofen Reißer Farrell Christoph Reißer Charm Ananthanarayan Tau Max-Planck-Institut für Physik, Munich Jamin Roig in collaboration with André H. Hoang and Pedro Ruiz-Femenía EuroFlavour 07 · Orsay · 14 - 16 Nov 2007 C. J. Reißer – p.1 6
WG3 Report Matthias Jamin Summary • Threshold scan allows for precise m t , y t , Γ t , α s determination Top • Effective theory approach crucial to sum up threshold contributions Hoang Scimemi Stahlhofen Unstable top leads to Reißer Farrell • Complex matching conditions Charm • UV phase space divergencies Ananthanarayan • Matching conditions for the t¯ t phase space that depend on definition Tau Jamin of “threshold top pair event” Roig • Cutoff involves mild power counting breaking • Phase space corrections are large (NLO) EuroFlavour 07 · Orsay · 14 - 16 Nov 2007 C. J. Reißer – p.17 7
WG3 Report Matthias Jamin The Top Yukawa Top Coupling at The Top Yukawa Coupling at 500 GeV � 500 GeV e t Hoang � ; Z Scimemi H Stahlhofen Reißer + � e t Farrell Cailin Farrell Charm Ananthanarayan Measurement Tau Motivation Jamin ILC at 500 GeV Roig NLL QCD Cailin Farrell Polarization in collaboration with André Hoang NLL EW Conclusion Max-Planck-Institut für Physik, Munich [hep-ph/0604166], [hep-ph/0504220] Orsay, 14.11.2007 8
WG3 Report Matthias Jamin Conclusion The Top Yukawa Top Coupling at 500 GeV Top Yukawa coupling for test of EWSB Hoang Scimemi Stahlhofen ILC at 500 GeV: Phase space is non-relativistic Reißer ⇒ vNRQCD Farrell Cailin Farrell Charm Completed: Ananthanarayan Strong and electroweak matching conditions at O ( NLL ) Measurement Tau Effects of e + e − polarization Motivation Jamin ILC at 500 GeV Roig Formula for the total cross section NLL QCD Increase of total cross section of up to 400% Polarization NLL EW δ Y t / Y t ≈ 10 − 15 % might be possible Conclusion Work in progress: Electroweak NLL decay effects Phase space matching 9
WG3 Report Matthias Jamin Top Puzzles of excited charm Hoang meson masses Scimemi Stahlhofen Reißer Farrell #�"OBOUIBOBSBZBO Charm Ananthanarayan $FOUFS�GPS�)JHI�&OFSHZ�1IZTJDT�� *OEJBO�*OTUJUVUF�PG�4DJFODF� Tau Jamin #BOHBMPSF� Roig In collaboration with Sunanda Banerjee, K. Shivaraj, A. Upadhyay, Physics Letters B 651,124-128, 2007 10
WG3 Report Matthias Jamin 1 α s and the Top Hoang Scimemi τ hadronic width Stahlhofen Reißer Farrell Charm Ananthanarayan Tau Jamin Work in process (progress?) with: Roig Martin Beneke All results are preliminary! α s and τ hadronic width EuroFlavour’07, Orsay Matthias Jamin 11
WG3 Report Matthias Jamin Hadronic Decays of the TAU Lepton within RESONANCE CHIRAL Top Hoang Scimemi THEORY (R F7 ): Stahlhofen Reißer Farrell W � o ��.�S� � Q W Charm Ananthanarayan Tau Jamin EuroFlavour '07 Roig Pablo Roig Garcés 14-16 November 2007 Univ. Paris-Sud 11, Orsay Pablo.Roig@ific.uv.es Instituto de Física Corpuscular CSIC-UVEG València (Spain) 12
WG3 Report Matthias Jamin SUMMARY: Top Hoang • Hadronic decays of the W lepton Scimemi Stahlhofen • Tools : F PT, R F T, Large N c (inspired) Reißer Farrell • Previous work: W � o �S�S�S� � Q W (Gómez Dumm, Pich, Charm Portolés ’04) Ananthanarayan • W � o ��.�S� � Q W Tau (Gómez Dumm, Pich, Portolés, R. ’07 to appear) Jamin Roig W � o (h 1 h 2 h 3 ) � Q W h 1 h 2 h 3 =3K, 2 S�.�� 2 S�K��.SK • Outlook : W � o ��.�S� � Q W in R F T EuroFlavour '07 Pablo Roig Garcés FlaviAnet Instituto de Física Corpuscular 13
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