KIT-NEP '19 - Theory Challenges in Higher-Order NEw Physics Calculations

Oct 7, 2019, 9:00 AM → Oct 9, 2019, 1:15 PM Europe/Berlin

30.35 Hochspannungstechnik-Hörsaal (HSI) (Karlsruhe Institute of Technology (KIT))

Milada Margarete Muhlleitner (KIT), Seraina Glaus, Marcel Krause (Karlsruhe Institute of Technology (KIT)), Stefan Liebler (KIT), Shruti Patel (ITP/IKP)

KIT-NEP '19 - Theory Challenges in Higher-Order NEw Physics Calculations

We thank all participants for making the workshop a success.

In view of the role change of the Higgs boson from the long-desired discovery object of our HEP dreams to a precision dissecting tool in our burning search for New Physics, the need for precision predictions of Higgs observables at the LHC has become a common lore and sine-qua-non by now.

Therefore higher-order corrections, both QCD and electroweak, have become indispensable. The computation of the higher-order corrections in beyond-the-Standard-Model extensions, in particular in the electroweak sector, faces challenges that are special compared to usual Standard Model calculations.

Such challenges are - to name only a few of them -
- gauge dependences of higher-order corrections
- the search for suitable renormalization schemes
- higher-order corrections blowing up in specific corners of the parameter space
- parametrically enhanced higher-order corrections
- symmetries of the models and their relation wrt higher-order corrections
- proper decoupling of heavy resonances
- …

We organize this workshop to discuss these challenges, to pin down the problems to the correct questions to be asked and to aim for their solution. The workshop is aimed to set the scene by a few keynote talks in combination with a selection of registered talks and to provide - importantly - enough room for in-depth discussions of the various challenges that we face.

Confirmed speakers include:

• Emanuele Bagnaschi
• Johannes Braathen
• Stefania de Curtis
• Stefan Dittmaier
• Florian Domingo
• Pedro Ferreira
• Lukas Fritz
• Margherita Ghezzi
• Raquel Gomez Ambrosio
• Mark Goodsell
• Christophe Grojean
• Gudrun Heinrich
• Wolfgang G. Hollik
• Shinya Kanemura
• Maximilian Löschner
• Heather Logan
• Sebastian Paßehr
• Heidi Rzehak
• Rui Santos
• Veronica Sanz
• Michael Spira
• Dominik Stöckinger
• Eleni Vryonidou

The local organizing committee is looking forward to your participation:

Margarete Mühlleitner, Seraina Glaus, Marcel Krause, Stefan Liebler, Shruti Patel

This workshop is supported by KCETA and the CRC TRR 257:

hotels-kitnep19.pdf

poster-kitnep19.pdf

privacy_policy_kitnep19.pdf

restaurants-kitnep19.pdf

Monday, October 7

9:00 AM → 10:00 AM Coffee break: Welcome coffee

10:00 AM → 12:00 PM Workshop session: Renormalization of Extended Higgs Sectors

Convener: Heidi Rzehak

10:00 AM Welcome

WelcomeKITNEPenlarged.pdf

10:10 AM Renormalization of mixing angles in extended Higgs sectors

Speaker: Stefan Dittmaier

dittmaier-kitnep19.pdf

10:40 AM Renormalization of the 2HDM and the N2HDM

Speaker: Rui Santos

Santos.pdf

11:10 AM Renormalization of Extended Higgs Sectors

Speaker: Maximilian Löschner

Loeschner-KIT-NEP-presentation-2019.pdf

11:40 AM Discussion time

12:00 PM → 1:30 PM Lunch break

1:30 PM → 3:40 PM Workshop session: Symmetries and Higher-Order Corrections

Convener: Mark Goodsell

1:30 PM Custodial Symmetry Violation in the Georgi-Machacek Model

Speaker: Heather Logan

GM-cust-viol-KITNEP.pdf

2:00 PM MSSM Higgs Boson Production via Gluon Fusion: The Large Gluino Mass Limit

Speaker: Heidi Rzehak

KITNEP19-Rzehak.pdf

2:30 PM Revisiting the hMSSM

Speaker: Stefan Liebler (KIT)

KITNEP19_Liebler.pdf

2:50 PM Parametrically enhanced corrections in supersymmetry, i.e. Delta_b corrections

Speaker: Michael Spira

spira.pdf

3:20 PM Discussion time

3:40 PM → 4:10 PM Coffee break

4:10 PM → 6:00 PM Workshop session: Renormalization and Gauge Dependences in Higher-Order Corrections

Convener: Dominik Stöckinger

4:10 PM On-Shell Renormalization of Higgs Boson Masses

Speaker: Sebastian Paßehr

HiggsMassMixing.pdf

4:40 PM Gauge Dependences of NMSSM Higgs Boson Decays including Higher-Order Corrections

Speaker: Florian Domingo

fdomingo_talk.pdf

5:10 PM Gauge Dependences in Higher-Order Corrected NMSSM Higgs Boson Decays and Masses

Speaker: Lukas Fritz

Fritz-kitnep.pdf

5:40 PM Discussion time

7:30 PM → 10:30 PM Reception: in the foyer of building 30.25

Tuesday, October 8

9:00 AM → 10:50 AM Workshop session: Enhanced Higgs-to-Higgs Decays

Convener: Stefan Dittmaier

9:00 AM Probing the Higgs sector using the synergy of future experiments

Speaker: Shinya Kanemura

KIT-NEP19_Kanemura.pdf

9:30 AM On two-loop corrections to the Higgs trilinear coupling in models with extended scalar sectors

Speaker: Johannes Braathen

Braathen_KITNEP19.pdf

10:00 AM Enhanced corrections in Higgs-to-Higgs decays of the 2HDM and N2HDM

Speaker: Marcel Krause (Karlsruhe Institute of Technology (KIT))

Krause - Enhanced Corrections in Higgs-to-Higgs Decays of the 2HDM and N2HDM (PDF-Slideshow).pdf

10:25 AM NLO electroweak corrections to H -> h h decays in the singlet extension

Speaker: Tania Robens

trobens_kitnep.pdf

10:50 AM → 11:20 AM Coffee break

11:20 AM → 1:00 PM Workshop session: Stability of BSM Higgs Potentials

Convener: Ansgar Denner

11:20 AM Impact of Vacuum Stability Constraints on the Phenomenology of Supersymmetric Model

Speaker: Wolfgang G. Hollik (KIT)

VacStabMSSM.pdf

11:50 AM Vacuum stability and supersymmetry at high scales with two Higgs doublets

Speaker: Emanuele Bagnaschi

KIT-NEP19-BAGNASCHI-v1.pdf

12:20 PM Higher-Order Minima in the Inert Doublet Model and Vacuum Instabilities in the N2HDM

Speaker: Pedro Ferreira

Ferreira - KIT-NEP 2019.ppt

12:50 PM Discussion time

1:00 PM → 2:30 PM Lunch break

2:30 PM → 4:15 PM Workshop session: Higher-Order Mass Corrections

Convener: Shinya Kanemura

2:30 PM Recent progress on higher-order corrections to Higgs boson masses in SUSY extensions

Speaker: Dominik Stöckinger

2019OctoberKITNEP.pdf

3:00 PM The Goldstone boson catastrophe arising in higher-order corrections to Higgs boson masses, and its possible solutions

Speaker: Mark Goodsell

GOODSELL.pdf

3:30 PM Pole mass determination in the presence of heavy particles

Speaker: Henning Bahl

4:00 PM Discussion time

4:15 PM → 4:45 PM Coffee break

4:45 PM → 6:30 PM Workshop session: Higgs Pair Production

Convener: Michael Spira

4:45 PM Higgs pair production in BSM models and EFT approaches including QCD corrections

Speaker: Eleni Vryonidou

Vryonidou_NEP.pdf

5:15 PM Higher order corrections in Higgs boson pair production within and beyond the SM

Speaker: Gudrun Heinrich

KITNEP2019.pdf

5:45 PM Higgs Pair Production: top-mass uncertainties in NLO QCD corrections

Speaker: Seraina Glaus

GlausKN.pdf

6:15 PM Discussion time

7:30 PM → 10:30 PM Workshop dinner: at Hoepfner Bräu

Wednesday, October 9

9:00 AM → 10:00 AM Workshop session: Young Scientist Forum

Convener: Eleni Vryonidou

9:00 AM Precise calculations of Higgs decay rates in extended Higgs sectors

Speaker: Kodai Sakurai

KIT_NEP_KS.pdf

9:15 AM Parton-shower Effects in Electroweak WZjj Production at the Next-to-Leading Order of QCD

Speaker: Johannes Scheller (Eberhard Karls Universität Tübingen)

2_Scheller_KITNEP19.pdf

9:30 AM Soft-gluon resummation for leptoquark pair-production at the LHC

Speaker: Christoph Borschensky (Universität Tübingen)

3_Borschensky_KITNEP19.pdf

9:45 AM Dark matter pair production in the MSSM and in simplified dark matter models at the LHC

Speaker: Gabriele Coniglio (Universität Tübingen)

4_Coniglio_KITNEP19.pdf

10:00 AM → 10:30 AM Coffee break

10:30 AM → 1:15 PM Workshop session: Composite Higgs and EFTs

Conveners: Eleni Vryonidou, Gudrun Heinrich (Max Planck Institute for Physics)

10:30 AM EFTs with Two Higgs Doublets

Speaker: Margherita Ghezzi

ghezzi_karlsruhe.pdf

11:00 AM A Concrete Composite 2-Higgs Doublet Model

Speaker: Stefania de Curtis

KIT-NEP19-decurtis.pdf

11:30 AM NLO Higgs effective field theory and Kappa framework

Speaker: Raquel Gomez Ambrosio

raquel_kitnep19.pdf

12:00 PM Outlook

Speaker: Christophe Grojean

Grojean_Karlsruhe_2019_10_09_v2.pdf

12:40 PM Farewell