Workshop on Precision Measurements of alpha_S

9 Feb 2011, 08:00 → 11 Feb 2011, 19:00 Europe/Berlin

Main auditorium (Max Planck Institut für Physik)

Andre Hoang (MPI Munich), Iain Stewart (MIT), Jochen Schieck (Ludwig Maximilians University), Siggi Bethke (MPI), Stefan Kluth (MPI für Physik)

The idea of this workshop at MPI für Physik is to explore and discuss in depth the determinations of alpha_S(m_Z) in the MSbar scheme from all the key categories where high precision measurements are currently being made. Since alpha_S is important for certain LHC measurements and since there are discrepancies in some determinations, such a workshop certainly seems in order. The main topic categories to be discussed in this 3-day workshop will be 1) Lattice QCD & Quarkonia 2) Tau Decays 3) e+e- Event Shape Distributions 4) R_had in Z-decays and EW Precision Observables 5) DIS and Global Fits 6) Future of alpha_S For each of the first 5 categories there will be a review talk by a person not involved in recent analyses and then a series of shorter invited talks by various groups who have been involved in recent analyses.  The goal is to initiate and facilitate a lot of discussion between groups and to have opportunities to explain details that one would normally not be able to present at a conference, but which may have an important impact on the analyses. It is the aim to provide a detailed exposition on the differences in the results and error analyses for alpha_S(m_Z)  within each method and between the different methods.  Each talk will be followed by time for questions to the speaker and each of the main categories will include an additional designated 30min time for free discussion involving the audience, speakers and conveners. All attendees are encouraged to participate in the discussions and point at issues they think are important.

more information putyourname.tex

pictures alpha_S.png alphasws-photo.jpg

Poster

• Alphas2a-tabloid-94345.png
• Alphas2a-tabloid.png
• Poster_v1.jpg

Wednesday, 9 February

08:00 Registration

Alpha_S World Average

1 Welcome

Speaker: Siggi Bethke (MPI)

Slides alphas-ws-2011-welcome.pdf

2 alpha_S World Average Overview Talk

Speaker: Siggi Bethke (Max Planck Institute für Physik)

Paper http://arXiv.org/abs/0908.1135

Slides alphas-ws-2011-intro.pdf

DIS and Global Fits I

Convener: Voica Radescu (Phys. Inst. Heidelberg)

3 alpha_S from DIS Review

Speaker: Claudia Glasman (UAM)

Slides glasmann_alphas_workshop.pdf

4 alpha_S from DIS Structure Functions

Speaker: Johannes Blümlein (DESY)

Slides ALPH.pdf

5 alpha_S in CTEQ Fits

Speaker: CP Yuan (MSU)

Slides alphas_cpy.pdf

10:50 Coffee Break

DIS and Global Fits II

Convener: Voica Radescu (Phys. Inst. Heidelberg)

6 alpha_S in MSTW Fits

Speaker: Robert Thorne (UCL)

Slides AlanMartin.pdf

7 alpha_S in NN PDF Fits

Speaker: Stefano Forte (INFN Milano)

Slides alphas.pdf

8 alpha_S in HERA PDF Fits

Speaker: Dr Burkard Reisert (Max-Planck-Institut für Physik)

Slides 2010_alphas_reisert.pdf

9 Discussion

12:40 Lunch

Measurement of Alpha_S with Tau Decays I

Convener: Andreas Hoecker (CERN)

10 Tau Review

Speaker: Antonio Pich (IFIC)

Paper http://arxiv.org/PS_cache/arxiv/pdf/1101/1101.2107v1.pdf

Slides Alphas2011-Pich.pdf

11 CIPT Analysis

Speaker: Sebastian Descotes-Genon (PSUD)

Paper http://arXiv.org/abs/1002.2968 http://arXiv.org/abs/arXiv:0803.0979

Slides asCIPT_descotes.pdf

12 FOPT Analysis

Speaker: Martin Beneke (RWTH)

Paper 0806.3156.pdf 1101.0681.pdf

Slides beneke.pdf

13 Relations between CIPT and FOPT Analyses

Speaker: Sven Menke (MPP)

Paper http://arxiv.org/pdf/0904.1796

Slides alphasws09022011.pdf

15:40 Coffee Break

Measurement of Alpha_S with Tau Decays II

Convener: Andreas Hoecker (CERN)

14 Duality Violations Analysis

Speaker: Maarten Golterman (SFSU)

Slides golterman.pdf.pdf

15 Perturbative Inputs to tau Analyses

Speaker: Johann Kuehn (KIT)

Slides tau_2111.pdf

16 Running of alpha_S low scales

Speaker: Matthias Steinhauser (KIT)

Slides steinhauser.pdf

17 Discussion

Thursday, 10 February

R_had in Z-Decay and EW Precision Observables I

Convener: Wolfgang Hollik (MPP)

18 alpha_S and EW Precision Observables Review

Speaker: Johann Kuehn (KIT)

Slides alphas-fromZ.pdf

19 alpha_S with GAPP

Speaker: Jens Erler (UNAM)

Paper

• 0005084.pdf
• 0207114.pdf
• 0211345.pdf
• 0303133.pdf
• 9803453.pdf
• http://pdg.lbl.gov/2010/reviews/rpp2010-rev-standard-model.pdf

Slides Erler.pdf

10:00 Coffee Break

R_had in Z-Decay and EW Precision Observables II

Convener: Wolfgang Hollik (MPP)

20 Alpha_S from the hadronic decay width of the Z

Speaker: Klaus Moenig (DESY)

Gfitter paper gfitter.pdf

Slides alphas_gfitter_moenig.pdf

Z-pole report z_pole_report.pdf

21 Discussion

Event Shape Measurements I

Convener: Yuri Dokshitzer (LPTHE)

more information WeisseBrauhaus.pdf

22 Review of Event Shape Measurements

Speaker: Gavin Salam (LPTHE)

Slides alphas-evshp-review.pdf

23 NNLO(+NLLA) and ALEPH data

Speaker: Thomas Gehrmann (UZH)

Slides gehrmann_mpi2011.pdf

24 NNLO and "classic" power corrections

Speaker: Bryan Webber (Cambridge)

Paper DavisonWeb.pdf DavWeb_err.pdf

Slides WebberAlphas.pdf

12:40 Lunch

Event Shape Measurements II

Convener: Yuri Dokshitzer (LPTHE)

25 alpha_S from SCET analysis

Speaker: Vicent Mateu (MPI for Physics)

Paper http://arxiv.org/pdf/1005.1644 http://arxiv.org/pdf/1006.3080

Slides mateu-alpha-workshop.pdf

26 alpha_S from 5-jets

Speaker: Giulia Zanderighi (Oxford)

Paper http://arxiv.org/abs/1008.5313

Slides Zanderighi.pdf

27 Jet and event shape observables at LHC

Speaker: Klaus Rabbertz (KIT)

Slides alpha_s-Workshop_022011.pdf

28 MC Tuning with "Professor"

Speaker: Holger Schulz (HU Berlin)

Main paper describing the method http://arxiv.org/pdf/0907.2973

More recent additions, focusses on error estimate http://arxiv.org/pdf/1005.5357v1

Slides hschulz.pdf.pdf

29 Experimental Issues and Combinations of results

Speaker: Stefan Kluth (MPI für Physik)

Slides epxissuestalk.pdf

30 Discussion

16:30 Coffee Break

MPP Colloquium

Institute colloquium as part of the workshop

31 Yuri Dokshitzer Colloquium Talk

Speaker: Yuri Dokshitzer (LPTHE)

Slides YuriDok_Colloq.pdf

19:30 Diner

Social event

http://weisses-brauhaus.de/anfahrt.de.php?node=68&lang=de

Friday, 11 February

Lattice Calculation I

Convener: Christine Davies (Uni Glasgow)

32 Review of Lattice Calculation

Speaker: Andreas Kronfeld (FNAL)

Paper http://arXiv.org/abs/1007.1444

Slides AlphaSK.pdf

33 alpha_S from HPQCD

Speaker: G Peter Lepage (Cornell)

Slides lepage-alphas11.pdf

34 alpha_S from PACS-CS

Speaker: Sinya Aoki (Tsukuba)

Paper alpha_s.PACS-CS.pdf

Slides Aoki_20110211.pdf.pdf

10:30 Coffee Break

Lattice Calculation II

Convener: Christine Davies (Uni Glasgow)

35 alpha_S from JLQCD

Speaker: Shoji Hashimoto (KEK)

Paper http://arXiv.org/abs/1002.0371

Slides JLQCD.pdf

36 alpha_S from ALPHA

Speaker: Rainer Sommer (DESY)

Paper Lattice2010.pdf

Slides alpha11.pdf

37 alpha_S from Analysis of Quarkonia

Speaker: Brambilla Nora (TUM)

Paper PhysRevD.75.074014.pdf

Slides alphasbramb.pdf

38 Discussion

12:30 Lunch

Future of Alpha_S Measurements I

Convener: Siggi Bethke (MPI für Physik)

39 Impact of alpha_S on GUT

Speaker: Yasunori Nomura (UCB)

Paper Higgs unification

Slides alpha_s.pdf

40 alpha_S at the LHC

Speaker: Frank Petriello (UW)

Paper 1101.0593.pdf

Slides Munich2011.pdf

41 alpha_S at the ILC

Speaker: Christoph Pahl (MPP)

Slides AlphasWs011-pahl.pdf

42 alpha_S and scale setting

Speaker: Stan Brodsky (SLAC)

Paper

• BLM.pdf
• http://prd.aps.org/abstract/PRD/v28/i1/p228_1
• http://prd.aps.org/abstract/PRD/v63/i9/e094017
• http://prd.aps.org/abstract/PRD/v74/i5/e054016
• http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVN-3YMWS7R-M&_user=10&_coverDate=10%2F12%2F1995&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=f5248bda4c5c9eb837e27c3173b18269&searchtype=a
• http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TVN-3VTC56Y-S-2&_cdi=5539&_user=145269&_pii=0370269396000573&_origin=search&_coverDate=04%2F04%2F1996&_sk=996279998&view=c&wchp=dGLzVzz-zSkWb&md5=93e0dedddddfa1acbb1ddac4ad92b240&ie=/sdarticle.pdf
• Kramer_Lampe.pdf
• paper

Slides

• Scale_Setting_Talk.pdf
• See_slides_83_and_following.pdf
• slides

15:30 Coffee Break

Future of Alpha_S Measurements II

Convener: Siggi Bethke (MPI für Physik)

43 Round Table Discussion

pictures alphas_summary.pdf alphas-ws-2011-iend.pdf