Confronting Naturalness: from LHC to Future Colliders

25 Apr 2018, 09:00 → 27 Apr 2018, 17:00 Europe/Berlin

SemRm4a (DESY HH build 1b)

With a Higgs boson discovered at LHC, but no other unambiguous sign of physics beyond the standard model seen so far, the question of naturalness of the electroweak sector and its suitability as guidance of future experiments becomes a more and more pressing issue. During this 3-day workshop, we will discuss status of naturalness in the context of all kinds of extensions of the Standard Model. In particular, we will confront different measures of naturalness and discuss the interplay of UV- and IR-based definitions. Each session will have ~2 presentations and ample room for discussion. Everybody is welcome to participate and people interested in giving a presentation should contact the organizers. A limited number of rooms in the DESY hostel has been reserved. Please tick the corresponding box during registration if you'd like to book one of them - we will assign them on a first-come-first-serve basis. We have the possibility to support postdocs working on naturalness-relevant questions to come to Hamburg for 2-3 weeks around the workshop - please contact Christophe.Grojean@desy.de or Jenny.List@desy.de in case you are interested!

Wednesday, 25 April

Registration

Composite models & Clockwork

1 Welcome

Speaker: Dr Jenny List (DESY Hamburg)

Slides natws18_jlist.pdf

2 Naturalness measures: UV vs IR

Speaker: Howard Baer (University of Oklahoma)

Slides DESY2018_1.pdf

3 SUSY naturalness

Speakers: Kai Schmidt-Hoberg (DESY-T), Kai Schmidt-Hoberg (DESY)

Slides Naturalness18.pdf

15:30 Coffee break

Composite models & Clockwork

4 Phenomenology of the clockwork solution to the hierarchy problem

Speaker: Yevgeny Kats (Ben-Gurion University)

Slides clockwork-pheno-2018-04-25-DESY.pdf

5 Composite Higgs phenomenology

Speaker: Oleksii Matsedonskyi (DESY)

Slides matsedonskyi.pdf

Thursday, 26 April

09:00 Coffee introduction

Naturalness in Supersymmetry

6 Naturalness and weak scale supersymmetry

Speaker: Howard Baer (University of Oklahoma)

Slides DESY2018_2.pdf

7 Minimising fine-tuning for SUSY models: LHC, Future Colliders and Dark Matter experiments

Speaker: Sascha Caron (Radboud University Nijmegen and Nikhef)

Slides Caron_FineTuning_Hamburg2018.pdf

8 Singlet scalar top partners from accidental SUSY

Speaker: Ennio Salvioni (TUM)

Slides Talk_DESY_Salvioni.pdf

12:25 Lunch break

Naturalness in other models

9 Universal Imprints of a pNGB Higgs Boson

Speaker: Ian Low (Northwestern University and Argonne National Lab.)

Slides Low_Desy.pdf

10 About relaxion cosmology

Speaker: Nayara Fonseca (DESY-T)

11 Baryogenesis and composite Higgs

Speaker: Mr Sebastian Bruggisser (DESY-T)

Slides Bruggisser_Baryogenesis.pdf

15:40 Coffee break

Expert Discussion on Finetuning Measures in SUSY

12 Discussion material

Speakers: All, Andreas Weiler (DESY-T)

Slides Weiler.pdf

Dinner

slides natws18_dinner_jlist.pdf

Friday, 27 April

09:30 Coffee introduction

Cosmological connections

13 Cosmological Dynamics of Higgs Fine-Tuning

Speaker: Matthew reece (Harvard)

Slides DESY2018_Reece.pdf

14 Challenges and progress in Relaxion models

Speaker: Camila Machado (Mainz)

Slides Machado.pdf

15 Large N, Disorder and Mimesis at the LHC

Speaker: Raffaele Tito D'Agnolo (SLAC)

Slides Hamburg_Apr2018.pdf

16 Relevant SM connected to vanishing dimension

Speaker: Hyung Do Kim (Seoul National University)

Slides 2018DESY_naturalness.pdf

13:00 Lunch break

Wrap-up/Conclusions

17 Naturalness motivations for future colliders

Speaker: All

16:00 Coffee break