Topological Effects in the Standard Model: Instantons, Sphalerons and Beyond at LHC

16 Dec 2020, 08:30 → 18 Dec 2020, 18:15 Europe/Zurich

Zoom Only (CERN)

Chiara Caprini (APC Paris), Matthew Philip Mccullough (CERN), Matthias Schott (CERN / University of Mainz), Tancredi Carli (CERN)

This workshop will explore possibilities to probe rare topological effects within the Standard Model, such as QCD instantons or Electroweak Sphaleron signatures at the LHC. While signatures of QCD instanton processes have been sought already at the HERA collider and significant theoretical work was done in the 1990s, electroweak sphalerons received recently some more attention, also in the view of possible future high energy colliders. The work-shop will also cover the experimental challenges in searches for instantons and sphalerons as well as the discovery potential at the LHC. 

It will be an entirely virtual workshop over three afternoons to review the current theoretical status and also the potential pitfalls in the underlying theoretical calculations. The workshop will be discussion-oriented with only two talks and one discussion session per day. 

Conference Picture: Taken from https://arxiv.org/abs/2003.02070 (Thanks to Yu Hamada)

Organizers: Chiara Caprini (APC-Paris), Tancredi Carli (CERN), Matthias Schott (Gutenberg University Mainz), Matthew McCullough (CERN).

Application deadline : December 11, 2020 h23:59

 

Wednesday 16 December

1 Theory Colloquium: Instantons and sphalerons of electroweak theory and QCD

Connection Details and the actual talk can be found on the Theory Colloquium Page.

Speaker: Edward Shuryak

Theory Colloquium

2 Introduction and Goals of the Workshop

Speaker: Matthias Schott (CERN / University of Mainz)

TopologyIntroduction.pdf

15:10 Virtual Workshop Photo - Part I

QCD Instantons: Overview Talks

Convener: Tancredi Carli (CERN)

3 Calculations of QCD Instanton Processes at Hera (30+10)

Speaker: Andreas Ringwald (Deutsches Elektronen-Synchrotron DESY)

TopEffSM_HERA.pdf

4 New Calculations of QCD Instanton Processes at LHC (30+15)

Speaker: Valentin V Khoze (Durham University)

Khoze_QCD_instantons.pdf

16:35 Virtual Coffee Break

QCD Instantons: Round Table Discussion

Conveners: Michelangelo Mangano (CERN), S. Moch (UHH)

5 Introduction to the discussion

6 Submitted Discussion Material

Speakers: Michelangelo Mangano (CERN), S. Moch (UHH)

Thursday 17 December

EW Sphalerons: Overview Talks

Convener: Matthew Philip Mccullough (CERN)

7 Electroweak Instanton Induced processes (30+5)

Speaker: Kazuki Sakurai (University of Warsaw)

EWInstanton_2020_12_17.pdf

8 Classicalization (30+5)

Speaker: Georgi Dvali

Gia_Dvali_Talk_Instanton_CERN.pdf

16:10 Virtual Coffee Break

EW Sphalerons: Overview Talks

9 Gravitational Waves (25+5)

Speaker: Pedro Klaus Schwaller (Mainz University)

Sphaleron-GW.pdf

EW Sphalerons: Round Table Discussion

Conveners: Felix Yu (Johannes Gutenberg University Mainz), Germano Nardini (University of Stavanger)

10 Introduction to the discussion

11 Submitted Discussion Material

Speakers: Felix Yu (Johannes Gutenberg University Mainz), Germano Nardini (University of Stavanger)

EW_Sphalerons_Discussion.pdf

Friday 18 December

Collider Signatures: Overview Talks

Convener: Matthias Schott (CERN / University of Mainz)

12 Simulation and phenomenlogy of Instanton- and sphaleron-induced processes (20+5))

Speakers: Simon Plaetzer (ITP, Universitaet Karlsruhe), Simon Platzer (University of Vienna (AT))

slides.pdf

13 Searches for QCD Instantons at Hera and EW Sphalerons limits at LHC (20+5)

Speaker: Achim Geiser (Deutsches Elektronen-Synchrotron (DE))

Instantons2020a.pdf

Instantons2020b.pdf

14 Signatures of QCD and Electroweak Instantons at LHC (20+5)

Speaker: Simone Amoroso (Deutsches Elektronen-Synchrotron (DE))

Instantons@LHC.pdf

Collider Signatures: Round Table Discussion

Conveners: Andreas Papaefstathiou (The University of Edinburgh (GB)), Stefan Gieseke (Karlsruhe Institute of Technology)

15 Introduction to the discussion

Speakers: Andreas Papaefstathiou (The University of Edinburgh (GB)), Stefan Gieseke (Karlsruhe Institute of Technology)

16 Submitted Discussion Material

Speakers: Andreas Papaefstathiou (The University of Edinburgh (GB)), Stefan Gieseke (Karlsruhe Institute of Technology)

TopologicalColliderSignatures.pdf

17:00 Virtual Workshop Photo - Part II

17:05 Virtual Coffee Break

General Discussion

Conveners: Edward Shuryak, Jonathan R. Ellis (University of London (GB))

cern_discussion_shuryak.pdf

Sphalerons.key

Sphalerons.pdf

17 Introduction to the discussion