The Standard Model prediction of the muon g-2 Massimo Passera Università and INFN Padova International Workshop “e + e - collisions from φ to ψ” Budker.

Slides:

Advertisements

Similar presentations

Il g-2 del Muone nel Modello Standard Massimo Passera Università and INFN Padova Road-Map INFN: Fisica e + e - a LNF Riunione 1: Milano, 4 Novembre 2005.

Advertisements

Il g-2 del muone nel Modello Standard Massimo Passera Università and INFN Padova Incontri di Fisica delle Alte Energie Pavia, Aprile 2006.

Peter Schleper, Hamburg University SUSY07 Non-SUSY Searches at HERA 1 Non-SUSY Searches at HERA Peter Schleper Hamburg University SUSY07 July 27, 2007.

Dipion Spectrum : e + e - annihilations and τ decays M. Benayoun LPNHE Paris 6/7 1M. Benayoun, e+ e- versus tau.

1 Tau Workshop, Nara, Sept 14-17, 2004M. Davier – Hadronic Contribution to (g – 2)     hadrons The Hadronic Contribution to (g – 2)  Michel Davier.

Spectroscopy of Heavy Quarkonia Holger Stöck University of Florida Representing the CLEO Collaboration 6 th International Conference on Hyperons, Charm.

B. Lee Roberts, NuFact WG4: 24 June p. 1/36 Muon (g-2) Past, Present and Future B. Lee Roberts Department of Physics Boston University

Muon g-2 experimental results & theoretical developments

1 V cb : experimental and theoretical highlights Marina Artuso Syracuse University.

Glasgow, October 25, 2007 Results on e+e- annihilation from CMD2 and SND G.V.Fedotovich and S.I.Eidelman Budker Institute of Nuclear Physics Novosibirsk.

Muon Magnetic Moment Workshop Glasgow 25 th October 2007 Eduardo de Rafael CPT, CNRS-Luminy Standard Model Prediction of the Muon Anomaly Electroweak and.

1    hadrons Revisiting the Tau/ee Discrepancy: Consequences for the Muon Anomaly Michel Davier Laboratoire de l’Accélérateur Linéaire, Orsay with.

1 Tau Workshop, Nara, Sept 14-17, 2004 M. Davier – ALEPH  Results ALEPH Results on  Branching Ratios and Spectral Functions Michel Davier Laboratoire.

Measurement of R at CLEO - Jim Libby1 Measurement of R at CLEO Jim Libby University of Oxford.

B. Lee Roberts, PANIC05, Santa Fe, 27 October, p. 1/35 Muon (g-2) Status and Plans for the Future B. Lee Roberts Department of Physics Boston University.

Debora Leone Institut für Experimetelle Kernphysik Universität Karlsruhe on behalf of KLOE collaboration Measurement of the hadronic cross section at KLOE.

1 Yurii Maravin, SMU/CLEO Snowmass 2001 Experimental Aspects of  physics at CLEO-c measurements of fundamental quantities, tests of weak couplings and.

Study of e + e  collisions with a hard initial state photon at BaBar Michel Davier (LAL-Orsay) for the BaBar collaboration TM.

The Hadronic Cross Section Measurement at KLOE Marco Incagli - INFN Pisa on behalf of the KLOE collaboration EPS (July 17th-23rd 2003) in Aachen, Germany.

R measurement at DAFNE-2 LNF-19-Jan-06 G. Venanzoni LNF.

Jan/15/04 Su DongLow Energy R Measurements with ISR1 Su Dong Stanford Linear Accelerator Center CLEO-c/BES c/  /QCD workshop, Beijing, Jan/15/2004.

CMD-2 and SND results on the  and  International Workshop «e+e- Collisions from  to  » February 27 – March 2, 2006, BINP, Novosibirsk, Russia.

ICHEP04 Beijing Global Electroweak fits and constraints on the Higgs mass Pete Renton Aug 2004 GLOBAL ELECTROWEAK FITS AND CONSTRAINTS ON THE HIGGS MASS.

Overview of magnetic and electric dipole moments and the Standard Model values of a e and a μ Thomas Teubner Introduction & motivation, overview EDMs and.

Measurements of R Value and Hadronic Form Factors at BES Haiming Hu Institute of High Energy Physics, CAS, Beijing Novosibirsk, Russian Feb. 27 – Mar.

Novosibirsk Standard Model and alpha 1 Tests of the Standard Model and  (m Z ) Bolek Pietrzyk LAPP, Annecy, IN2P3, CNRS International Workshop.

Measurement of the Hadronic Cross Section at DA F NE with KLOE Achim G. Denig for the KLOE Collaboration La Thuile, Vallée d’Aoste XXXIX th.

Low energy e + e –  hadrons in Novosibirsk I.Logashenko On behalf of the CMD-2 and SND Collaborations Budker Institure of Nuclear Physics (Novosibirsk,

Peter Kammel First Results from the New Muon Lifetime Experiments at PSI GFGF gPgP L 1A MuCap “MuSun” project MuLan.

BaBar physics, recent highlights and future prospects Owen Long, BaBar physics analysis coordinator U. C. Riverside & SLAC December 5, 2008.

M.Davier BaBar pi pi Tau /9/ Precision Measurement of the e + e   +   (  ) Cross Section with the ISR Method Michel Davier ( LAL – Orsay)

1    hadrons e  e  annihilation and  physics Michel Davier, Yuan Changzheng LAL-Orsay and IHEP-Beijing First France-China FCPPL Workshop January.

Energy determination at BEPC-II  Satellite Meeting «On the Need for a super-tau-charm factory» September 26 – 27, 2008, BINP, Novosibirsk, Russia M.N.

1 MIT Colloquium, Boston, Dec 1, 2005A. Höcker – The Muon g –2 Challenge    hadrons Precision Probes of New Physics: The Muon (g – 2) Challenge Andreas.

Precise α s from  Decays(*) M. Davier, S. Descotes-Genon, A. Hoecker, B. Malaescu, and Z. Zhang Tau08 Workshop Novosibirsk, Sept (*) arxiv: ;

Initial State Radiation and Inclusive Hadron Production at B A B AR Fabio Anulli University of Perugia, INFN – Laboratori Nazionali di Frascati On behalf.

Measurement of Vus. Recent NA48 results on semileptonic and rare Kaon decays Leandar Litov, CERN On behalf of the NA48 Collaboration.

K.K. Gan The Ohio State University New Results on  Lepton July 17, 2003.

Review of τ -mass measurements at e + e - - colliders Yury Tikhonov (Budker INP) Contents  Introduction  Current status of τ-mass measurements and μτ.

Progress on F  with the KLOE experiment (untagged) Federico Nguyen Università Roma TRE February 27 th 2006.

Experimental setup Data taking Vus CPT a  had f 0 KLOE - May 20, The KLOE experiment at the Frascati  -factory.

Yannis K. Semertzidis Brookhaven National Laboratory Fundamental Interactions Trento/Italy, June 2004 Theoretical and Experimental Considerations.

Brian Plimley Physics 129 November Outline  What is the anomalous magnetic moment?  Why does it matter?  Measurements of a µ  : CERN.

Muon g-2, Rare Decays P → l + l - and Transition Form Factors P →   Introduction Lepton anomalous magnetic moments (status) Rare  0 →e + e – Decay.

Study of e+e- annihilation at low energies Vladimir Druzhinin Budker Institute of Nuclear Physics (Novosibirsk, Russia) SND - BaBar Lepton-Photon, August,

Priscilla Cushman University of Minnesota ICHEP Aug 16-22, 2004 Beijjing, China The g-2 Collaboration Boston University, Brookhaven National Laboratory,

Febr.28-March 2, 2006N Nbar project at VEPP The project to measure the nucleon form factors at VEPP-2000 Workshop - e+e- collisions from phi to psi,

Achim Denig Radiative DA F NE MENU 2004 Measurement of the Hadronic Cross Section via Radiative Return at DA  NE Achim Denig for the KLOE Collaboration.

A High Statistics Study of the Decay M. Fujikawa for the Belle Collaboration Outline 1.Introduction 2.Experiment Belle detector 3.Analysis Event selection.

D. LeoneNovosibirsk, , 2006Pion Form KLOE Debora Leone (IEKP – Universität Karlsruhe) for the KLOE collaboration International Workshop.

E + e - hadronic cross section and muon g-2 Brendan Casey PIC 2014 September 17, 2014 Sept 11, 2014 muon g-2 experimental hall.

Isospin breaking (IB) corrections to  decays Gabriel López Castro Cinvestav, México 10th International Workshop on Tau Lepton Physics Novosibirsk,

First results from CMD-3 detector at VEPP-2000 collider Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, Russia September 2011 E.Solodov (for.

First results from SND at VEPP-2000 S. Serednyakov On behalf of SND group VIII International Workshop on e + e - Collisions from Phi to Psi, PHIPSI11,

1 RECENT RESULTS AND FUTURE PROSPECTS IN TAU PHYSICS: HIGHLIGHTS OF THE 10th WORKSHOP ON TAU PHYSICS AT NOVOSIBIRSK Martin Perl.

Belle General meeting Measurement of spectral function in the decay 1. Motivation 2. Event selection 3. mass spectrum (unfolding) 4. Evaluation.

IV Euridice Collaboration Meeting Marseille, 8-11 February 2006 Hadronic Cross Section measurement at DA  NE with the KLOE detector Hadronic Cross Section.

Yannis K. Semertzidis Brookhaven National Laboratory HEP Seminar SLAC, 27 April 2004 Muon g-2: Powerful Probe of Physics Beyond the SM. Present Status.

“ OUTLOOK” g-2: Theory vs Experiment (For motivation see D. Stoeckinger’s Talk) William J. Marciano Mainz April 5, 2014.

Measurement of the total hadronic cross-section at e+e- machines I. Logashenko Boston University (Boston, USA) Budker Institure of Nuclear Physics (Novosibirsk,

1 Tau 2010 – Manchester Andreas Hoecker – Muon g – 2 : Update and conclusions Andreas Hoecker (CERN) Tau Workshop, Manchester, UK, Sep 13 – 17, 2010 —

MC generator for the process e+e-  with RC pro mille accuracy

Cross section of the process

VMD/HLS Approach to (g-2)μ : A Solution to the (τ - e+e- ) Puzzle

Does g-2 point to new physics?: Current Status and Future Plans

Study of the reaction e+e-  p+p- at KLOE

The Impact of BaBar ISR data on the SM Muon Anomaly Prediction

Barva Maura - Università Roma Tre On behalf of the KLOE Collaboration

Study of e+e collisions with a hard initial state photon at BaBar

Vacuum Polarization and the impact of BaBar data

Presentation transcript:

The Standard Model prediction of the muon g-2 Massimo Passera Università and INFN Padova International Workshop “e + e - collisions from φ to ψ” Budker Institute of Nuclear Physics, Novosibirsk March 1st 2006

M. Passera Mar 1st parts per million !! a  = (63) £ E821 – Final Report: hep-ex/ The current world average value:

M. Passera Mar 1st 063 a  EXP = ( § 54 stat § 33 sys ) £

M. Passera Mar 1st 064 The Anomalous Magnetic Moment: Theory QFT predicts deviations from the Dirac value:  The Dirac theory predicts for the muon:  Study the photon – lepton vertex: 

M. Passera Mar 1st 065 a  QED = (1/2)(  /  ) Schwinger (27) (  /  ) 2 Sommerfield, Petermann, Suura, Wichmann, Elend, MP ’ (43) (  /  ) 3 Barbieri, Laporta, Remiddi, …, Czarnecki, Skrzypek, MP ’ (8) (  /  ) 4 In progress Kinoshita & Lindquist ’81, …, Kinoshita & Nio July ’ (20) (  /  ) 5 In progress Kinoshita et al. ‘90, Yelkhovsky, Milstein, Kataev, Starshenko, Broadhurst, Karshenboim, Laporta, Ellis et al.,…, Kataev ’05, Kinoshita & Nio Dec ’05. a  QED = (0.1) (0.4) x using  = 1/ (46) [3.3 ppb] PDG’04 Adding up, I get: The QED Contribution to a  …

M. Passera Mar 1st 066 a e th = + (1/2)(  /  ) (60) (  /  ) 2 Schwinger 1948 Sommerfield, Petermann ’57, Suura, Wichmann ’57, Elend ’66, MP ’ (19) (  /  ) 3 Barbieri, Laporta, Remiddi, …, Czarnecki, Skrzypek, MP ’ (35) (  /  ) 4 In progress Kinoshita & Lindquist ’81, …, Kinoshita & Nio July ’ (3.8) (  /  ) 5 In progress (12672 mass-indep. diagrams!) Mohr & Taylor ’05 (CODATA 2002); Kinoshita & Nio, in progress (19) x Hadronic Mohr & Taylor ’05 (CODATA 2002), Davier & Hoecker ’98, Krause ’97, Knecht ’ (5) x Electroweak Mohr & Taylor ’05 (CODATA 2002) [ The Electron g-2 and (the best determination of) Alpha ] Comparing a e th (  ) with a e exp = (42) one gets: CODATA ’98 based on Van Dyck Schwinberg and Dehmelt 1987    = (50) [3.6 ppb] Kinoshita & Nio ’05 versus    = (110) [7.7 ppb] Wicht et al    = (46) [3.3 ppb] CODATA ’02 & PDG ’04 Check of QED at 4 loop level !

M. Passera Mar 1st 067 Back to a  : The Electroweak Contribution One-Loop Term:  1972: Jackiv, Weinberg; Bars, Yoshimura; Altarelli, Cabibbo, Maiani; Bardeen, Gastmans, Lautrup; Fujikawa Lee, Sanda. One-Loop plus Higher-Order Terms:  a  EW = 154 (2) (1) x Higgs mass, M_top error, three-loop nonleading logs Hadronic loop uncertainties: Kukhto et al. ’92, Czarnecki, Krause, Marciano ’95; Knecht, Peris, Perrottet, de Rafael ’02; Czarnecki, Marciano, Vainshtein ’02; Degrassi, Giudice ’98; Heinemeyer, Stockinger, Weiglein ’04 Gribouk, Czarnecki ’05.

M. Passera Mar 1st 068 Hadronic contributions - I Dec ’01 Aug ’03 Hagiwara et al., PRD 69 (2004) Bouchiat & Michel 1961, Gourdin & de Rafael 1969 S. Eidelman, INFN Roadmap Meeting, LNF, Jan 2006

M. Passera Mar 1st 069 Hadronic contributions - II a  HLO = 6934 (53) exp (35) rad x A. hep-ph/ = 6948 (86) x F. Jegerlehner, Nucl. Phys. Proc. Suppl. 126 (2004) 325 = 6924 (59) exp (24) rad x K. Hagivara et al., PRD69 (2004) = 6944 (48) exp (10) rad x de Troconiz, Yndurain, PRD71 (2005) Radiative Corrections (Luminosity, ISR, Vacuum Polarization, FSR) are a very delicate issue! All under control? CMD2’s new (1998)     data presented at HEP-EPS 2005 and here agree well with their earlier (1995) ones. The SND     data released in June 05 have recently been reanalyzed (RC fixed,  decreased – see Achasov’s talk). There is now good agreement with the CMD2     data.  Data from e + e - (CMD2 after August 2003)

M. Passera Mar 1st 0610 Hadronic contributions - III Radiative Return (KLOE & BABAR): The collider operates at fixed energy but s  can vary continuously  This is an  important independent method! Some discrepancies between KLOE’s and CMD2’s results, although their contributions to a  HLO are similar. SND’s JETP101 (2005) 1053 data were significantly higher than KLOE’s ones above the  peak, but they now decreased. Comparison in the range (0.37 < s   < 0.93) GeV 2 : a   = (3786 § 27 stat § 23 sys+th ) £ CMD2 (95) PLB578 (2004) 285 a   = (3770 § 22 stat § 15 sys+th ) £ CMD2 (95+98) Eidelman preliminary a   = (3756 § 8 stat § 48 sys+th ) £ KLOE a   = (3767 § 13 stat § 49 sys+th ) £ SND new Eidelman preliminary a   = (3856 § 14 stat § 50 sys+th ) £ SND old JETP 101 (2005)1053

M. Passera Mar 1st 0611 Hadronic contributions - IV Tau Data (ALEPH, CLEO, OPAL and BELLE)  The tau data of ALEPH and CLEO are significantly higher than CMD2 e+e- ones above  » 0.85 GeV. KLOE confirms this discrepancy with the tau data. In the same region, SND [no longer] agrees with ALEPH. The recent tau results of BELLE are in better agreement with e+e- data (see plot). Latest value (Davier, Eidelman, Hoecker & Zhang, EPJC31 (2003) 503): a  HLO = 7110 (58) x Inconsistencies in the e + e - or tau data? Are all possible isospin-breaking effects properly taken into account?? (Marciano & Sirlin 1988; Cirigliano, Ecker, Neufeld , …)

M. Passera Mar 1st 0612 Hadronic contributions - V Davier, Hoecker & Zhang, hep-ph/

M. Passera Mar 1st 0613 Hadronic contributions - VI M  2 (GeV 2 ) G. Venanzoni, INFN Roadmap WG, LNF, Jan-06 BELLE hep-ex/ Interesting developments in Lattice evaluations: See Aubin’s talk.

M. Passera Mar 1st 0614 Higher-order Hadronic contributions Vacuum Polarization  Light-by-Light  a  HHO (vp) = -98 (1) x a  HHO (lbl) = + 80 (40) x Knecht & Nyffeler 2002 a  HHO (lbl) = +136 (25) x Melnikov & Vainshtein 2003 O    contribution of diagrams containing hadronic vacuum polarization insertions: The contribution of the O    hadronic light-by-light diagram had a troubled life. The latest vales are: Krause’96, Alemany et al.’98, Hagivara et al.’03 Hayakawa, Kinoshita 2001; Bijnens, Pallante, Prades 2001; Knecht, Nyffeler 2001, … This may become the ultimate limitation of the SM prediction. See Vainshtein’s talk. Shifts by » -3 £ if tau data are used instead of the e + e - ones. Davier, Marciano 2004

M. Passera Mar 1st 0615 Standard Model vs. Experiment Adding up all the above contribution we get the following SM predictions for a  and comparisons with the measured value: a  HLO (lbl) = 80 (40) x a  HLO (lbl) = 136 (25) x [1] A. hep-ph/ [2] F. Jegerlehner, Nucl. Phys. Proc. Suppl. 126 (2004) 325. [3] Hagivara, Martin, Nomura & Teubner, PRD69 (2004) [4] J.F. de Troconiz & F.J. Yndurain, PRD71 (2005) [5] Davier, Eidelman, Hoecker and Zhang, EPJC31 (2003) 503.

M. Passera Mar 1st 0616 Conclusions The discrepancies  (Exp-SM) range from 2.1 to 3.2  according to the values chosen for the hadronic contributions, if e + e - data are used (recent CMD2 and SND results are not yet included). With  data,  (Exp-SM) » 1  only! The e + e - vs  puzzle is still unsolved. Unaccounted isospin viol. corrections? Problems in the e + e - or  data? News: SND no longer agrees with Aleph. Belle’s  data are in better agreement with e + e -. More work and data needed from KLOE, Babar, Belle... Future: QED and EW sectors ready for the E969 challenge! The Hadronic sector needs more work and future experimental results: VEPP-2000 (DAFNE-2?). An improvement by a factor of 2 is challenging but possible! The effort is certainly worth the opportunity to unveil (or just constrain) “New Physics” effects!   

M. Passera Mar 1st 0617 The future?

M. Passera Mar 1st 0618 The End