Light scalars: origin, cosmology, astrophysics, and experimental probes

Europe/Zurich
Centro de Ciencias de Benasque Pedro Pascual

Centro de Ciencias de Benasque Pedro Pascual

Av. Francia 17 Benasque 22440 Spain
Aurelio Juste Rozas (Universitat Autรฒnoma de Barcelona (ES)), Geraldine Servant (Deutsches Elektronen-Synchrotron (DE)), Joerg Jaeckel (ITP Heidelberg), Maxim Pospelov, Michael Spannowsky (University of Durham (GB))
Description

This workshop intends to foster discussion across all fields relevant to the motivation and discovery of light scalar fields. Scalar fields are predicted by many extensions of the Standard Model and can address a variety of open fundamental questions in particle physics and cosmology. The workshop will bring together experts from the theoretical and experimental communities for a joint brainstorming on the status of this research, identify areas for improvements, as well as set new promising directions to further their detection.

The topics that will be covered include:

- Axions and axion-like particles
- Relaxion
- Scalar-tensor theories
- Light dilaton
- Cosmological constant
- Dark matter
- Stringy connections and Swampland
- Inflation
- Searches at collider/beam-dump experiments

The workshop will take place at the Centro de Ciencias de Benasque Pedro Pascual (http://benasque.org/) located in Benasque (Spain), between April 7 and April 13, 2019. Benasque is a beautiful village with a famous ski resort, located in the heart of the Pyrenees, close to the Spanish border with France. In addition to the auditorium, the Center offers desk space, ubiquitous black boards and several meeting areas. To ensure a productive workshop, attendance will be limited to a maximum of 60 participants. The agenda will also be kept light, with two overview talks on specific topics in the morning and open discussions during the rest of the day.

Bulletins
    • 09:00 09:30
      Registration 30m
    • 09:30 10:00
      Coffee Break 30m
    • 10:00 10:15
      Welcome and Introduction
      • 10:00
        Welcome and Introduction 15m
        Speakers: Aurelio Juste Rozas (ICREA and IFAE (ES)), Geraldine Servant (Deutsches Elektronen-Synchrotron (DE)), Joerg Jaeckel (ITP Heidelberg), Maxim Pospelov, Michael Spannowsky (University of Durham (GB))
    • 10:15 13:00
      Overview Talks
    • 13:00 15:00
      Lunch Break 2h
    • 15:00 16:30
      Informal Discussions
    • 16:30 17:00
      Coffee Break 30m
    • 17:00 18:30
      Contributed Talks
      • 17:00
        The axion - dark photon - 21cm connection 15m
        Speaker: Josef Pradler (Austrian Academy of Sciences (AT))
      • 17:30
        Axion properties in GUTs 15m
        Speaker: Carlos Tamarit (Technische Universitรคt Mรผnchen)
      • 18:00
        Axions from strings 15m
        Speaker: Edward Hardy (University of Liverpool)
    • 19:00 21:00
      Welcome Reception 2h
    • 09:30 10:30
      Overview Talks
      • 09:30
        QCD axion updates 30m
        Speaker: Javier Redondo (Universidad de Zaragoza)
    • 10:30 11:00
      Coffee Break 30m
    • 11:00 13:00
      Overview Talks
      • 11:00
        Experimental overview of physics beyond colliders 30m
        Speaker: Gaia Lanfranchi (INFN e Laboratori Nazionali di Frascati (IT))
      • 12:00
        Light dilaton 30m
        Speaker: Alex Pomarol (Universitat Autonoma de Barcelona & IFAE)
    • 13:00 15:00
      Lunch Break
    • 15:00 16:30
      Informal Discussions
    • 16:30 17:00
      Coffee Break 30m
    • 17:00 18:30
      Contributed Talks
      • 17:00
        Non-standard EW phase transition & new light states 15m
        Speaker: Oleksii Matsedonskyi (INFN Padua/Padua University)
      • 17:30
        Higgs-mediated bound states in dark matter models 15m
        Speaker: Julia Harz (DESY Hamburg)
      • 18:00
        Dark energy detection with laboratory experiments 15m
        Speaker: Clare Burrage (University of Nottingham)
    • 09:30 10:30
      Overview Talks
      • 09:30
        ALP-photon-dark photon oscillations and their cosmological or astrophysical implications 30m
        Speaker: Kiwoon Choi (KAIST)
    • 10:30 11:00
      Coffee Break 30m
    • 11:00 12:00
      Overview Talks
      • 11:00
        Where the wild things are 30m
        Speaker: Nemanja Kaloper (UC Davis)
    • 12:00 13:00
      Contributed Talks
      • 12:00
        Gauge field and fermion production via Chern-Simons coupling 15m
        Speaker: Kyohei Mukaida (Kavli IPMU)
    • 13:00 15:00
      Lunch Break
    • 15:00 16:30
      Informal Discussions
    • 16:30 17:00
      Coffee Break 30m
    • 17:00 18:45
      Contributed Talks
      • 17:00
        Relaxion updates 15m
        Speaker: Enrico Morgante (Universite de Geneve (CH))
      • 17:30
        Baryogenesis during relaxation 15m
        Speaker: Rick S. Gupta (IPPP - Durham)
      • 18:00
        Implication of supercooling on DM in composite Higgs 15m
        Speaker: Yann Gouttenoire (DESY)
      • 18:30
        Light scalar dark matter coupled to the trace of the energy-momentum tensor 15m
        Speaker: Anna Tokareva (INR RAS)
    • 09:30 10:30
      Overview Talks
      • 09:30
        Dynamical emergence of a small cosmological constant 30m
        Speaker: Tomer Volansky (Tel Aviv University (IL))
    • 10:30 11:00
      Coffee Break 30m
    • 11:00 13:00
      Overview Talks
      • 11:00
        Ultra-light axions, weak gravity, and Euclidean wormholes 30m
        Speaker: Arthur Hebecker (Heidelberg University)
      • 12:00
        Relaxion stars and their detection via atomic physics 30m
        Speaker: Hyungjin Kim
    • 13:00 15:00
      Lunch Break
    • 15:00 16:30
      Informal Discussions
    • 16:30 17:00
      Coffee Break 30m
    • 17:00 18:00
      Informal Discussions
    • 18:00 19:15
      Contributed Talks
      • 18:00
        Hot axions and the H0 tension 15m
        Speaker: Alessio Notari
      • 18:30
        Probing muonic forces and dark matter at kaon factories 15m
        Speaker: Diego Redigolo (Weizmann Inst. & Tel Aviv University)
      • 19:00
        A Fresh Look at the Calculation of Tunneling Actions 15m
        Speaker: Jose Ramon Espinosa Sedano (ICREA / IFAE Barcelona (ES))
    • 09:30 10:30
      Free time
    • 10:30 11:00
      Coffee Break 30m
    • 11:00 13:00
      Free time
    • 13:00 15:00
      Lunch Break
    • 15:00 16:30
      Informal Discussions
    • 16:30 17:00
      Coffee Break
    • 17:00 18:30
      Contributed Talks
      • 17:00
        Detecting axion-like DM with linearly polarized pulsar light 15m
        Speaker: Tao Liu (The Hong Kong University of Science and Technology)
      • 17:30
        Scalar dark matter: a non-minimal perspective 15m
        Speaker: Gonzalo Alonso Alvarez (Universidad de Zaragoza (ES))
      • 18:00
        New LHC searches for resonances of 1 to 100 GeV 15m
        Speaker: Filippo Sala
    • 19:00 22:00
      Farewell Drink 3h