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Virtual meetings on Standard Model Phenomenology [14-18 June]

Despite the cancellation, we decided to cover, in a reduced format through a few virtual meetings, some of the subjects related to SM phenomenology at the LHC that are traditionally discussed in Les Houches, during the "first" session. If you are interested, please have a look here

Cancellation of the 2021 PhysTeV edition

Due to the recent evolution of the Covid-19 pandemic situation, we have come to the conclusion that we will not be able to organise the event as initially hoped, especially in view of the various restrictions and contraints imposed. We therefore regret to announce the cancellation of the 2021 PhysTeV edition.
We hope that you understand this difficult decision.
The next edition of the PhysTeV Les Houches workshop is planned for June 2023.


Aim and Format

This series of workshops, started more than 20 years ago, aims at pushing the frontier of fundamental Physics by bringing together theorists and experimentalists working on several aspects of phenomenology at TeV colliders and other experiments.

World experts are brought together to address fundamental problems raised notably by the Higgs boson discovery, dark matter and the disappearance of antimatter in the Universe, and to develop new techniques and original strategies to discover signals of new Physics at TeV-scale particle colliders and other experiments, as, for instance, precision low-energy experiments.

The main theme of the 2021 edition will be "Intensify the search for new Physics". The Workshop will cover aspects related to:

a) modern techniques to perform precise computations of strong and electroweak corrections in the Standard Model and beyond
b) the phenomenological impact of the above predictions at present and future TeV colliders
c) the phenomenology of New Physics models at TeV colliders and the interplay with non-collider signatures
d) new ideas to look for Physics Beyond the Standard Model in low-energy experiments 

Another theme of this edition will be related to Machine Learning (ML) techniques, in particular the interplay between ML-inspired techniques and (B)SM phenomenology at colliders.

As per tradition, the workshop will also foster discussions between theorists and experimentalists on current shortcomings and future developments of theory tools that are used by the experimental collaborations.

The Workshop runs over one year, including two meetings in Les Houches in the month of June, and exchanges and collaborations before and after the meetings. The meetings in Les Houches will consist of two sessions:


Session I: 7-16 June 2021

with emphasis on SM-related issues

Session II: 16-25 June 2021

with emphasis on New-Physics searches

WG Topics

For the 2021 edition, we have set up the working groups described below. In the spirit of the Les Houches PhysTev series, we expect a strong interplay and collaboration between the different groups and their subgroups. The projects are to start in March/April 2021 and should be completed by the end of the year 2021.

Session 1 

  • Higgs Physics (SM aspects): The main goal of this WG is to address the currently open theoretical and experimental issues relevant for the ultimate measurements of the Higgs  boson properties at the LHC, and the prospects at future colliders. The WG will focus on the precise calculations of signal and background cross sections relevant for state-of-the-art measurements of the Higgs-boson properties. Improvements and new ideas in search strategies will also be discussed.

  • Techniques and calculations for SM phenomenology: The topics to be discussed in this WG are related to theoretical predictions for SM processes and their phenomenology. The status and future prospects for state-of-the-art predictions at fixed-order ((N)NLO QCD, NLO EW, mixed QCD-QED effects) will be the main focus to be discussed. Aspects related to  resummation at all-orders of large logarithmic contributions for specific observables, as well as modern developements in the extraction of PDFs and their interplay with computations at higher-order will also be covered in this WG.

  • Jet-substructure techniques: The topics to be discussed in this WG are the theoretical developments of jet-substructure techniques and their phenomenological applications. Particularly from this edition, we foresee extensive discussions on the connection between these developments and Machine-Learning techniques.

  • Monte Carlo generators, Tools, Machine-Learning: Topics to be covered in this WG have a large overlap with the other WGs: new approaches to implement higher-order corrections into Monte Carlo event generators will be discussed, as well as recently proposed ideas to improve the formal accuracy of Parton-Shower algorithms. From this edition, another topic on which emphasis will also be put are the opportunities opened up by the application of ML techniques to different aspects of Standard Model physics at the LHC.

 Session 2

  • Higgs Physics (BSM aspects): This WG will cover aspects of Higgs-physics related to new physics. Constraints on new physics models will be addresses, either directly through the information the SM-like Higgs bosons provides for particle searches, or indirectly by its role in, e.g., flavour and low-energy physics, or its connection with Dark Matter. 

  • BSM phenomenology at colliders: In this WG, collider signatures of new physics models will be discussed together with other phenomenological aspects, e.g., from Higgs, Dark Matter, or flavour physics. Particular attention will be given to potential signals at the forthcoming runs of the LHC.

  • High-precision low-energy probes:  This WG covers searches for new physics using novel probes based on high precision measurements in atoms and molecules.

  • Monte Carlo generators, Tools, Machine-Learning: Topics to be covered in this WG have a large overlap with the other WGs. The emphasis will be on the implementation of new techniques to extract and implement new physics or set limits on generic models. Special focus will also be given to topics related to Machine-Learning techniques. 

The meeting in Les Houches, between June 7th and June 25th, 2021, will be the central point of the Workshop. Here, in addition to the Working Group activities, a few lectures and review talks are planned. Participation to the Workshop is open to all. However, due to space limitation in Les Houches, attendance to the meeting is limited to 70 participants at any given point. Due to the overwhelming response of the past sessions, PhysTeV Les Houches 2021 is over a period of almost 3 weeks. Though we expect a few participants to be able to attend the meeting in its full duration, plans will be made so that a roughly equal number of participants cover the first or the second half of the meeting.

In 2021 it is likely that there will be restrictions on the number of participants attending the Workshop in Les Houches.

Coordination with other Workshops

Coordination with other Workshops may be taking place. In particular, for 2021, we foresee some overlap with the Snowmass activities.