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Wits ICPP-iThemba LABS Seminars in Particle Physics

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Bruce Mellado (University of the Witwatersrand and iThemba LABS) , Mukesh Kumar (University of the Witwatersrand)
Description

The field of Particle Physics is going through very exciting times with the presence of a number of growing anomalies that the Standard Model cannot explain. 
The Wits Institute for Collider Particle Physics and iThemba Labs will be hosting a series of Seminars under the theme:

Previous "Wits ICPP / iThemba LABS Webinars in Particle Physics”

11 August 2021: Which way beyond the Standard Model is the muon magnetic moment pointing? 
Speaker: Prof. John Ellis, CBE FRS King’s College London
Watch on YouTube
View Slides 

30 Jun 2021: New results from the Muon g-2 experiment at Fermilab
Speaker: Prof Graziano Venanzoni, INFN (co-spokesperson Muon g-2 experiment)
Watch on YouTube
View Slides 

21 July 2021: Muon g-2 in the standard model and a lattice QCD calculation of the leading hadronic contribution
Speaker: Prof. Laurent Lellouch, CRNS & Marseilles University 
Watch on YouTube
View Slides
 

21 October 2022:  13:15 – 14:30 SAST (CET)
The Heavyweight W-boson - an Upset to the Standard Model of Particle Physics
Speaker:  Prof. Ashutosh V. Kotwal, Fritz London Distinguished Professor, Duke University 
View Poster
Watch on YouTube

ellis_slides.pdf
fermilab_muon2_venanzoni.jpg
kotwal_poster.pdf
lellouch_slides.pdf
venanzoni_slides.pdf
Wits-ICPP iTL poster_lellouch.pdf
Wits ICPP iTL poster_venanzoni.pdf
Wits ICPP poster_ellis.pdf
For more info Contact:
  • Wednesday, 30 June
    • 14:30 → 15:30
      New results from the Muon g-2 experiment at Fermilab 1h

      At the beginning of 2000's the E821 experiment at Brookhaven (USA) has measured the anomalous magnetic moment of the muon (known also as muon g-2) with a precision of 0.54 parts per million, finding a discrepancy of about three standard deviations with the theoretical prediction of the Standard
      Model. This longstanding discrepancy is one of the most intriguing hints of new physics in particle physics. In order to understand this discrepancy a new Muon g-2 experiment has been approved at Fermilab (USA) and started taking data in 2018. We will report the first results of the new Muon g-2
      Experiment at Fermilab which measured the muon g-2 with a precision slightly better than the BNL one

      Speaker: Prof. Graziano Venanzoni
      New results from the Muon g-2 experiment at Fermilab: Prof Graziano Venanzoni
      Wits ICPP iTL poster.pdf
  • Wednesday, 21 July
    • 14:30 → 15:30
      Muon g-2 in the standard model and a lattice QCD calculation of the leading hadronic contribution 1h

      Twenty years ago in an experiment at Brookhaven National Laboratory, physicists measured the muon's
      anomalous magnetic moment, , with a remarkable precision of 0.54 parts per million.
      Since then, the standard model prediction for has exhibited a discrepancy with experiment of over 3
      standard deviations, raising the tantalising possibility of physical particles or forces as yet undiscovered.
      On April 7 a new experiment at Fermilab presented its first results, brilliantly confirming Brookhaven's
      measurement and bringing the discrepancy with the standard model to a near discovery level of 4.2 . To
      fully leverage this and future measurements, and possibly claim the presence of new fundamental
      physics, it is imperative to check the standard model prediction with independent methods, and to reduce
      its uncertainties. After an introduction and a discussion of the current experimental and theoretical status
      of , I will present a precise lattice QCD calculation, by the BMW collaboration, of the contribution to
      this quantity that most limits the precision of the standard model prediction. The result of this
      calculation significantly reduces the gap between the standard model and experiment, and suggests that
      new physics may not be needed to explain the current, experimental, world-average value of

      Speaker: Prof. Laurent Lellouch (CNRS & Aix-Marseille U)
  • Wednesday, 11 August
    • 14:30 → 15:30
      Which way beyond the Standard Model is the muon magnetic moment pointing? 1h

      The Fermilab muon g-2 experiment has recently confirmed the previous Brookhaven measurement, and both are in apparent tension with calculations within the Standard Model. After reviewing the history of theoretical calculations and experimental measurements of the muon g-2, I will discuss possible interpretations of this tension, including alternative Standard Model calculations as well as scenarios for physics beyond the Standard Model, including leptoquarks, a Z’ boson and supersymmetry.

      Speaker: Prof. John Ellis (CBE FRS King’s College London)
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