STEALTH physics at LHCb: unleashing the full power of LHCb to probe new physics

17 Feb 2020, 14:00 → 19 Feb 2020, 18:30 Europe/Zurich

Adrian Casais Vidal (Instituto Galego de Física de Altas Enerxías (ES)), Alexandre Brea Rodriguez (Universidade de Santiago de Compostela (USC), IGFAE), Carlos Vazquez Sierra (Nikhef National institute for subatomic physics (NL)), José Francisco Zurita (KIT), Martino Borsato (Ruprecht Karls Universitaet Heidelberg (DE)), Xabier Cid Vidal (Instituto Galego de Física de Altas Enerxías), Yuhsin Tsai (University of Maryland)

This is a joint theory and experimental LHCb workshop hold in Santiago de Compostela (Spain), to trigger a fruitful discussion and look for new opportunities at LHCb concerning STEALTH physics.

With STEALTH, we refer to signatures involving either small couplings, soft objects, or decays from new light resonances, all of these cases where the special features of LHCb can be particularly relevant, always bearing in mind that a BSM signal can easily carry more than one of these features. This includes, but is not limited to, dark sectors, ALPs, dark photons, Hidden Valley, light Higgses, light DM and in general BSM models with interesting signatures for LHCb not directly related to flavor physics. Provided that the current LHCb upgrade will be completed by the end of 2020, first months of the next year turn out to be the right time to organise such a workshop where all well-motivated models would be collected, and to plan the different search strategies before data is delivered again.

Santiago is a small and historic town in the northwest of Spain, being a UNESCO world-heritage site. Santiago has an airport providing relatively good connections within Europe, including several weekly flights to Geneva. Other close-by airports include Porto or Coruña. We plan to meet for three days, in a friendly atmosphere, trying to promote lively discussion.

We have now (27/05/2021) submitted an arxiv paper that encompasses the main conclusions from the workshop. You can find it here!

Doodle (workshop dinner): https://doodle.com/poll/k6ruxip9zi89b9ge

Wi-Fi login: stealth_wifi

Wi-Fi password: cpdVsAjWXG6t

Monday 17 February

14:30 → 15:00 Registration

15:00 → 15:30 Welcome and introduction

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

stealth_intro.pdf

15:30 → 16:00 LHCb reconstruction and PID

Speaker: Murilo Santana Rangel (Federal University of of Rio de Janeiro (BR))

2020_02_17_rangel_Reconstruction_PID_STEALTH.pdf

16:00 → 16:30 LHCb trigger in Run 3

Speaker: Miguel Ramos Pernas (Universidade de Santiago de Compostela (ES))

Miguel_Ramos_Pernas_LHCb_Run3_Trigger.pdf

16:30 → 17:00 Coffee break

17:00 → 17:30 LHCb results in Stealth Physics

Speaker: Philip Ilten (University of Birmingham (GB))

ilten.pdf

17:30 → 18:00 Simulation tools

Speaker: Diego Martinez Santos (Universidade de Santiago de Compostela (ES))

fastsims2020.pdf

fastsims2020.pptx

18:00 → 18:30 Discussion (ask an experimentalist)

Speakers: Carlos Vazquez Sierra (Nikhef National institute for subatomic physics (NL)), José Francisco Zurita (KIT)

Ask_an_experimentalist.pdf

Tuesday 18 February

10:00 → 10:30 The future of LHCb

Speaker: Federico Leo Redi (EPFL - Ecole Polytechnique Federale Lausanne (CH))

Redi-Santiago2020.pdf

10:30 → 11:00 Codex-b experiment status

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

CODEXb_Stealth.pdf

11:30 → 12:00 Coffee break

12:00 → 12:30 Searching for Confining Hidden Valleys at LHCb

Speaker: Yuhsin Tsai (University of Maryland)

HV_stealth_LHCb.pdf

12:30 → 13:00 Z portal to a confining hidden sector

Speaker: Ennio Salvioni (CERN)

Talk_Santiago_Feb2020.pdf

13:00 → 15:00 Lunch

15:00 → 15:30 Long Lived Particles Searches in Heavy Ion Collisions at the LHC

Speaker: Dr Jan Hajer (Université catholique de Louvain)

Long Lived Particles Searches in Heavy Ion Collisions at the LHC

15:30 → 16:00 Dark photons theory

Speaker: Patrick Foldenauer

hidden_photons_stealth2020.pdf

16:00 → 16:30 LHC probes of co-scattering dark matter

Speaker: Susanne Westhoff (Heidelberg University)

santiago-westhoff.pdf

16:30 → 17:00 Coffee break

17:00 → 17:30 Baryogenesis and Dark Matter from Mesons

Speaker: Gilly Elor

ElorLHCbStealth.pdf

17:30 → 18:00 Collider Implications of Baryogenesis and Dark Matter from B Mesons

Speaker: Miguel Escudero (King's College London)

Escudero_Baryogenesis_Stealth_LHCb.pdf

18:00 → 18:30 Discussion (ask a theorist)

Speakers: Martino Borsato (Ruprecht Karls Universitaet Heidelberg (DE)), Yuhsin Tsai (University of Maryland)

21:00 → 23:00 Workshop dinner

Wednesday 19 February

10:00 → 10:30 Who are LHCb's main rivals?

Speaker: Albert De Roeck (CERN)

deroeck_LHCb_2020_v2.pdf

deroeck_LHCb_2020_v2.pdf

deroeck_LHCb_2020_v2.pptx

10:30 → 11:00 Probing dark sectors with long-lived particles at BELLE II

Speaker: Ruth Schäfer (Universität Heidelberg)

Santiago_Schaefer.pdf

11:00 → 11:30 Novel 𝐵-decay signatures of light scalars at high energy facilities

Speaker: Maria Ramos (LIP)

STEALTH.pdf

11:30 → 12:00 Coffee break

12:00 → 12:30 ALPs from composite Higgs models

Speaker: Diogo Buarque Franzosi (Chalmers University of Technology)

PCFranzosi.pdf

12:30 → 13:00 Identifying Exclusive Displaced Hadronic Signatures at LHCb

Speaker: José Francisco Zurita (KIT)

Zurita_Santiago_H2S4K.pdf

13:00 → 15:00 Lunch

15:00 → 18:00 Discussion and work in common