LHC HWG for BSM Higgs (WG3)

LHCHWG3 is responsible to provide support and recommendations for BSM Higgs related issues.

Group organization

Group conveners:

The WG has appointed contacts for several topics which are of interest to the group:

Extended Higgs Sector (neutral + charged Higgs bosons):

• ATLAS: Lidija Zivkovic (2019), Nikos Rompotis (02/2021)
• CMS: Mariarosaria d'Alfonso (2021)
• Theory: Tania Robens, Rui Santos, Shufang Su.
• Twiki containing BRs numbers for H+->cb in the 3HDM: Hplus3HDM.
• Twiki containing cross section and BRs numbers for 2HDM: LHCHWG2HDM.
• Twiki containing cross section and BRs numbers for flavorful 2HDM: LHCHWG3Flavorful2HDM.
• Twiki for LFV Higgs decay in BGL.
• Twiki for 2HDM benchmarks.
• Twiki for the Georgi-Machacek model.
• Twiki for benchmarks other than 2HDM
• Twiki for the width and interference treatment recommended for a common treatment for ATLAS and CMS analyses.
• Twiki for MSSM charged Higgs (heavy, light, intermediate masses).
• Check physics case for 3HDM, LRS, CPV, SM+Triplet models, in case provide cross sections and BRs: Santos to write short summary of which code is good for which
• Interface theory constraints for an additional singlet into ScannerS: done. Santos to add more info.
• Cross sections and BRs for 2HDM+singlet models (real & complex): Nikos Rompotis.
• Inclusion of 2HDM electroweak baryogenesis information in electroweak phase transition properties by using the BSMPT code by Maggie: Maggie, Nikos Rompotis.
• Theoretical predictions for interference effects for large width charged Higgs decays: done. Santos to write a short description of regions of parameter space that have large interference effects.
• Expand 2HDM/MSSM H+ cross sections from 2 two 3 TeV: .
• Provide benchmark scenarios for searches for H5 states in GM for masses below 200GeV: Heather Logan
• Provide simulation tool for loop-induced H+->W+ gamma with fermiophobic H+ in GM: Heather Logan
• Email all the contacts Lidija.Zivkovic@SPAMNOTcernNOSPAMPLEASE.ch,nikolaos.rompotis@SPAMNOTcern.ch,dalfonso@SPAMNOTcern.ch,Jan.Steggemann@SPAMNOTcern.ch,Tania.Natalie.Robens@SPAMNOTirb.hr,rasantos@SPAMNOTfc.ul.pt,shufang@SPAMNOTphysics.arizona.edu,lhc-higgs-bsm-convener@cern.ch.
• Dedicated Twiki page with detailed information.
• Tasks discussed in the group and timelines:

MSSM Higgs

• ATLAS: Tim Barklow (2019)
• CMS: Artur Gottmann (2020)
• Theory: Michael Spira, Pietro Slavich, Emanuele Bagnaschi
• contact all the conveners here
• Dedicated twiki with all the latest information is here.
• Tasks discussed in the group and timelines:

Task	Involved persons	Status	Timescale
Keep an eye on potentially missing signatures		In progress	Continuous
WG support to the release of experimental likelihoods		In progress	Continuous
Prioritize channels according to importance for end of LHC run2/3 or HL-LHC		In progress	End Continuous
A/H decay to SUSY states and corresponding ROOT files		In progress	2021
Higgs pT public note		In progress (link)	2021
Provide description and common tool for BSM Higgs pT calculation @ NLO+PS precision for gluon fusion		In progress (link)	2021
ROOT files public note		In progress	2021
Release ROOT files with proper HDECAY/FH matching		In progress	End 2020
Release ROOT files for mh125 variants with negative mu		Complete	Nov 2020
Update of the ROOT files (SM BRs, HDECAY modification of SUSY-QCD corrections to h/H/A -> bb for proper Delta_b terms, FH proper version)		Complete	Nov 2020
Provide updated ROOT files for end RunII analyses		Complete	End 2018
Provide benchmark scenario for low tanb using EFT approach		Complete	End 2018
Provide new MSSM benchmark scenarios		Complete	Sept 2018
Update SM parameters for MSSM calculations to be consistent with YR recommendations for SM calculations		Complete	Sept 2018

NMSSM Higgs

• ATLAS: Nikos Rompotis (2018)
• CMS: Janek Bechtel (2020)
• Theory: Ulrich Ellwanger, Margarete Mühlleitner, Nausheen Shah
• Email all the conveners: here
• Twiki with all group information: LHCHWGNMSSM
• Tasks and timelines:

Exotic Higgs Decays

• ATLAS: Verena Martinez (02/2021)
• CMS: Georgia Karapostoli (2020)
• LHCb: Lorenzo Sestini
• Theory: Brian Shuve, Matthias Konig
• Dedicated twiki with all the latest information is here
• email all the conveners here
• Tasks discussed in the group and timelines:

Task	Involved persons	Status	Timescale
Provide a benchmark for interpretations of h->aa->4y/2g2y searches	Andrea Thamm	DONE	ALP benchmark
Reinterpret prompt decays results for LLP signatures	Experimentalists	In progress within collaborations	Full Run 2 papers
List uncovered, but well motivated, Higgs decays searches involving one or more displaced vertices.	Brian Shuve	Note In progress	June 2021
Add feasibility studies for h-&gt	All	planned	lower priority
Provide final recommendations for h->W/Z+meson: link	Zhen Liu, Stefan Alte	superseded, see below
Parameter calculations for Higgs rare decays beyond gamma+J/Psi, gamma+phi, gamma+Upsilon	Matthias Koenig	DONE	Parameter_calculations
List of high priority channels for inclusion into BSM H fits and for which experimentalists are highly encouraged to publish likelihood scans ( see p7-9). In the form of slides or a short document.	Theorists	In progress	Spring 2021
Update predictions h->W/Z+meson, publish as note	Matthias Koenig	In Progress	Summer 2021
Determine model benchmarks giving h->2f+MET	Brian Shuve	In Progress	Summer 2021
Determine future meeting structure and organization in subgroup	All	In Progress	Summer 2021
What is the best way to present Higgs searches with displaced vertices to allow a simple recast by theorists?	Theorists	In progress	winter 2021

bbH/bH Associated Production

• ATLAS: Tim Barklow (02/2021)
• CMS: Abdollah Mohammadi (07/2019)
• Theory: marius.wiesemann@SPAMNOTcernNOSPAMPLEASE.ch
• michael.spira@SPAMNOTpsiNOSPAMPLEASE.ch, marius.wiesemann@SPAMNOTcern.ch, lhc-higgs-bsm-convener@cern.ch
• Dedicated twiki with all the latest information is here.
• Tasks discussed in the group and timelines:

Other groups

Other useful information for LHC HWG task forces/sub-groups that are relevant to WG3 activities:

• Branching ratio sub-group: twiki is here, contact them by clicking here
• Di-Higgs sub-group: twiki is here, contact them by clicking here.

gitlab repository and tools

There is a gitlab repository in which various WG3 items are stored. For the time being the following folders are

• 2HDM
• MSSM for neutral and charged Higgs

If you need to put something on gitlab or you have some question please contact the WG3 conveners.

The list of the notes (public, interim recommendations and internal) is here.

Meetings

Indico page of the WG3

Mailing lists

How to subscribe to mailing lists

The mail address for the WG3 is lhc-higgs-bsm@cernNOSPAMPLEASE.ch. All messages are archived here.

We highly recomment to also be subscribed to the general HWG mailing list: lhc-higgs@cernNOSPAMPLEASE.ch.

The conveners can be reached at lhc-higgs-bsm-convener@cernNOSPAMPLEASE.ch, but only if you already subscribed to either the WG3 mailing list or the generic lhc-higgs HWG mailing list.

WG3 related documentation

All the documents, public and internal can be found in the LHC HWG Library.

• arXiv:1607.05291: Intermediate mass region for charged Higgs production, Celine Degrande, Rikkert Frederix, Valentin Hirschi, Maria Ubiali, Marius Wiesemann, Marco Zaro.
• LHCHXSWG-2015-002: public note on low tanbeta MSSM scenarios.
• The 10th workshop of the LHC HXSWG has a good overview of the topics studied in WG3 up to July 2015.
• Low tanbeta scenarios note LHCHXSWG-INT-2015-004 , to become public soon.
• Georgi-Machacek VBF H+ -> WZ Public LHC HXSWG note LHCHXSWG-2015-001.
• Heavy charged Higgs cross sections update: Martin Flechl, Richard Klees, Michael Kr\"amer, Michael Spira, Maria Ubiali, Improved cross-section predictions for heavy charged Higgs boson production at the LHC. arXiv:1409.5615, Phys.Rev. D91 (2015) 7, 075015.
• Interim recommendations for the evaluation of Higgs production cross sections and branching ratios at the LHC in the Two-Higgs-Doublet Model, LHCHXSWG-2013-001.

General documentation

A great deal of information can be found in the three CERN Reports: Handbook of LHC Higgs Cross Sections:

1. Inclusive Observables ( CERN-2011-002, arXiv:1101.0593).
2. Differential Distributions ( CERN-2012-002, arXiv:1201.3084).
3. Higgs Properties ( CERN-2013-004, arXiv:1307.1347).
   • BibTeX and LaTeX citation format for CERN-2011-002 (arXiv:1101.0593), CERN-2012-002 (arXiv:1201.3084) and CERN-2013-004 (arXiv:1307.1347).

-- MarioPelliccioni - 16 Jul 2014