Physics Beyond Colliders meets theory: informal discussions about PBC selected topics

8 Jun 2020, 16:00 → 11 Jun 2020, 18:30 Europe/Zurich

Virtual only (CERN)

Simon Knapen (CERN), Diego Redigolo (CERN-INFN Florence), Gaia Lanfranchi (INFN e Laboratori Nazionali di Frascati (IT))

With FIPS 2020 being postponed to the Fall of 2020, this virtual workshop aims to host a few talks and informal discussions related to searches for feebly interacting light particles. The scope is primarily on accelerator-based probes of hidden sectors, with a mix of theory and experiment.

The workshop will be fully virtual and consist out of 3 sessions of each 2 hours, taking place from 4pm to 6pm CERN time on the 3 days of the workshop. The timing is chosen to maximize the workshop's accessibility to as many time zones as possible. Talks are by invitation only.

If the status of the COVID crisis permits this, a conference room will be provided for CERN-based physicists to attend the talks. No in-person visits to CERN for the purpose of this workshop can be accommodated.

We will be using zoom, log in information has been sent by e-mail to all registered participants.

In solidarity with the academic strike for black lives [1], the Wednesday (June 10th) session is postponed to Thursday (June 11th), with minor modifications to the schedule to accommodate other commitments of the various speakers. Please refer to the updated timetable for details.

[1] https://www.particlesforjustice.org/

Monday 8 June

16:00 → 18:05 session 1

16:00 introduction

PBC_meets_theory.pdf

16:05 Searches for heavy neutral lepton and dark scalar production in kaon decays at NA62

Speaker: Evgueni Goudzovski (University of Birmingham)

goudzovski_080620.pdf

16:35 Photoproduction of axion-like particles at NA64

Speaker: Dmitrii Kirpichnikov (Russian Academy of Sciences (RU))

Kirpichnikov_PBC_2020.pdf

17:05 Accelerator probes for milicharged particles

Speaker: Dr Yu-Dai Tsai (Fermilab)

Tsai_MCP_FerMINI.pdf

17:35 discussion 1

Tuesday 9 June

15:30 → 18:00 session 2

15:59 announcements

Speaker: Gaia Lanfranchi (INFN e Laboratori Nazionali di Frascati (IT))

PBC_meets_Theory_proceedings.pdf

16:00 Probing the Relaxed Relaxion with Luminosity & Precision

Speaker: Gilad Perez (Weizmann)

Gilad_Perez_PBC_CERN20.pdf

16:30 MEG II and mu3e

Speaker: Angela Papa

Papa_PhysicsBeyondColliders_MEGII_Mu3e.pdf

17:00 Searches for feebly-interacting particles at LHCb

Speaker: Xabier Cid Vidal (Instituto Galego de Física de Altas Enerxías)

Searches_FIPs_LHCb_XCidVidal.pdf

17:30 discussion 2

Wednesday 10 June

16:00 → 17:00 session 3: No talks due to academic strike for black lives

Thursday 11 June

16:00 → 18:00 session 4

16:00 collider probes of axion-like particles

Speaker: Yotam Soreq (Technion- Israel Institute of Technology (IL))

2020_06_PCB_selected_topics.pdf

16:30 Theory perspective on KOTO

Speaker: Kohsaku Tobioka

tobioka_talk2020@PBC_CERN.pdf

17:00 The Majoron in rare decays

As the Goldstone boson associated with lepton number the Majoron is intimately connected and coupled to Majorana neutrinos. At loop level it receives couplings to all other Standard Model particles, including flavor-changing lepton and quark couplings. This makes rare decays a prime hunting ground for these axion-like particles that could ultimately help us to understand the seesaw mechanism.

Speaker: Julian Heeck

heeck-CERN2020.pdf

17:30 discussion 3