group f : loop calculations lcws05 2005.03.22 stanford univ. k.kato (kogakuin) highlights
Post on 20-Dec-2015
217 views
TRANSCRIPT
![Page 1: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/1.jpg)
group F : Loop Calculations
LCWS052005.03.22 Stanfo
rd Univ.K.Kato (Kogakuin)
Highlights
![Page 2: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/2.jpg)
Kato Electroweak Correction for the Study of Higgs Potential in LC
jointly withGroup A:Higgs and EWSB
Heinemeyer Recent higher-order corrections in the r/cMSSM Higgs sector
Kniehl Dominant two-loop electroweak correction to H->2gamma
Hahn New Developments in FormCalc
Kuehn Sudakov Logarithms in N^3LL Approximation
Martin Precision corrections to sfermion masses
Dixon Practical spinoffs from twistor space
Mitov Heavy Quark Fragmentation Function at NNLO
Dittmaier Electroweak corrections to four-fermion production
Freitas Precise predictions for the effective weak mixing angle
jointly withGroup C:Precision EW
Stoeckinger Two-Loop Contributions to Delta(Rho) and the W-mass prediction in the MSSM
Penaranda Electroweak precision observables in the NMFV MSSM
![Page 3: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/3.jpg)
e+e- 4f
• The great job is accomplished by Denner, Dittmaier, Roth, Wieders hep-ph/0502063
• Theoretical uncertainty at threshold2% a few 0.1%
• RacoonWW Racoon4f
![Page 4: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/4.jpg)
![Page 5: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/5.jpg)
Higgs@ILC
Now, RC for important 3,4 body channels are available
![Page 6: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/6.jpg)
Full 1-loop RC available
Httee
ZHHee
Hee GRACE, PLB559(2003)252Denner et al., NPB660(2003)289
GRACE, PLB571(2003)163You et al., PLB571(2003)85Denner et al., PLB575(2003)290
GRACE, PLB576(2003)152Zhang et al., PLB578(2004)349
Heeee
ee e ,
Chen Hui etal., NPB683 (2004) 196
GRACE, PLB600(2004)65
GRACE, NIM A534(2004)334
HHee GRACE, Talk by Y.Yasui at Durham(Sep.2004)
Htt
LCWS05
![Page 7: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/7.jpg)
Hγγ
By B.Kniehl
![Page 8: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/8.jpg)
Method
Conclusion
![Page 9: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/9.jpg)
r/cMSSM Higgs
MSSM Higgs is connected to other sectors through loops. Require theoretical understanding in high precision.
by S.Heinemeyer
![Page 10: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/10.jpg)
![Page 11: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/11.jpg)
Δρ
by D.Stoeckinger
![Page 12: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/12.jpg)
weak mixing angle
by A.Freitas
![Page 13: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/13.jpg)
sfermion masses
TSIL=Two-Loop Self-energy Integral Library
by S.Martin
![Page 14: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/14.jpg)
Non Minimal Flavor Violation in MSSM
by S.Penaranda
![Page 15: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/15.jpg)
massive form factor
by J.Kuehn
![Page 16: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/16.jpg)
![Page 17: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/17.jpg)
Heavy Quark Fragmentation function
by A. Mitov
![Page 18: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/18.jpg)
New FormCalc
by T.Hahn
![Page 19: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/19.jpg)
![Page 20: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/20.jpg)
New method from twister space
• Much progress in computational techniques gauge theories in last year or so is attributable (directly or indirectly) to development of twistor string theory
• So far, practical spinoffs mostly for trees, and for loops in supersymmetric theories
• However, loop-level versions of BCF recursion relations look promising
• Try to determine polynomial terms in non-SUSY (QCD) loop amplitudes this way (unitarity for branch-cut terms)
• Expect much more progress along these lines in futureby L.Dixon
![Page 21: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/21.jpg)
A 6-gluon example
220 Feynman diagrams for gggggg
Helicity + color + MHV (--++++) results + symmetries
3 BCF diagrams
related by symmetry
![Page 22: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/22.jpg)
The one diagram
![Page 23: Group F : Loop Calculations LCWS05 2005.03.22 Stanford Univ. K.Kato (Kogakuin) Highlights](https://reader030.vdocuments.us/reader030/viewer/2022032801/56649d535503460f94a2fd95/html5/thumbnails/23.jpg)
Last comments
• Higher order calculation required for ILC is steadily in progress including the full EW one-loop
• Higgs at ILC : O ( α ) calculation is ready for most of processes.
• Two-loop in EW/MSSM/QCD/QCD-EW available for a class of physical observables.
• High-precision sometimes requires large scale computation Importance of the development of tools for HEP.
csduduee ,,