DBL (Dibosons, Multileptons and Extra Dimensions) Subgroup

• Conveners : Dominik Duda and Ines Ochoa
• DBL mailing list : atlas-phys-hdbs-dbl (old list: hn-atlas-exotics-dbx ( archive))
• Meetings : Weekly on Wednesdays 15:30 CERN time. Diboson/Multilepton Subgroup Meetings
• DBL Contacts : atlas-phys-hdbs-dbl-contacts

The DBL group searches for new physics with two or more electroweak bosons or multileptons. Main topics of interest include new heavy gauge bosons decaying to diboson, heavy neutrinos, technicolor, Randall-Sundrum Gravitons, inclusive same-sign dilepton, tri-/four-lepton inclusive searches, together with interpretations for relevant new physics models. We also provide a forum for discussing models of extra dimensions, e.g. RS models predicting TeV-scale gravitons.

Ideas for New Searches

• %NEW% Looking for a topic? See list of uncovered analyses or consider contributing to one of the active analyses.

Active analyses

Analysis	Person-Power	Meetings	Contacts	eGroup	Wiki	Derivation	Analysis Framework	Statistical Framework	Glance
Fully hadronic Final States
VV → JJ		Tue 12h	A. Giannini, S. Schramm	atlas-phys-hdbs-VVres-JJ	VVJJFullRun2	EXOT3		ResonanceFinder	Phase0
Vh → qqbb		Fri 17h	Z. Meadows	atlas-phys-hdbs-VHres-qqbb	VhqqbbFullRun2	EXOT3	CxAOD	ResonanceFinder	HDBS-2018-11
Y → Xh → qqbb		Fri 15h	J. Gonski	atlas-phys-hdbs-XHres-JJ	VhqqbbFullRun2	EXOT3	CxAOD	ResonanceFinder	HDBS-2019-23
Hγ /Vγ		Thur 14h	Hγ: Bo Liu, Boping Chen, Vγ: Bo Liu, Shu Li	atlas-phys-hdbs-BosonGamma-hadronic	VgammaFullRun2	EXOT3	CxAOD		Hγ: HDBS-2018-17 Vγ: HDBS-2019-10
Dark Jet Resonances		Wedn 11h	E. Hansen,D. Portillo	atlas-phys-hdbs-DarkJetResonances	DarkJetResFullRun2	EXOT3			HDBS-2018-45
Semi-leptonic Final States
Vh semi-leptonic / A → Zh (125 GeV)		Frid 14.30h	D, Duda, W. Fisher	atlas-phys-hdbs-VHres-semileptonic	VhSemileptonicFullRun2	HIGG5D1 HIGG5D2 HIGG2D4	CxAOD	ResonanceFinder	HDBS-2018-12
A → ZH (not 125 GeV)		Tues 15h	X. Sun	atlas-phys-hdbs-A-Zh-hHeavy	AZHFullRun2	HIGG2D4	CxAOD/MIA	WSMaker	HDBS-2018-13
VH for Generic Heavy Higgs			Yue Xu, Ke Li	atlas-phys-hdbs-VH-GenericHeavyHiggs	VHGenericHeavyHiggs				HDBS-2019-16
VHH		Mon 17h	Matthew Klein, Lianliang Ma	atlas-phys-hdbs-VHH-Vlep4b					HDBS-2019-31
Other Analyses
WZ → lvll		Wed 13h	J. Manjarres, M. Lu	atlas-phys-hdbs-WZres-lvll	WZlvllFullRun2	HIGG2D1	WZlvllFrame	ResonanceFinder	HDBS-2018-19
Y → ZX (Z → ll)			K. Han, D. Zhang	atlas-phys-hdbs-ZXresonances-semilep	ZXresFullRun2				HDBS-2019-12
Combination			DBL-specific: R. Les, Overall: K. Terashi, D. Hayden	atlas-phys-exotics-hbinterpretations	DBLcomboFinalRun2	-	-		EXOT-2018-53

Public Results

Publications with full Run 2 dataset

Analysis	Contacts	eGroup	Wiki	Derivation	Analysis Framework	Statistical Framework	Glance	Public Result
Fully hadronic Final States
VV → JJ	DBL Conveners	atlas-phys-hdbs-VVres-JJ	VVJJFullRun2	EXOT3		ResonanceFinder	Phase0, HDBS-2018-31	arXiv:1906.08589 JHEP09(2019)091
VBF HH → 4b	Yu Nakahama, M. Swiatlowski	atlas-phys-hdbs-DiBoson-4b	hh4bFullRun2	EXOT8			Phase0 HDBS-2018-18 Conf-Conversion	ATLAS-CONF-2019-030
CWoLa Hunting	A. Cukierman, B. Nachman	atlas-phys-hdbs-CWoLaHunting-hadronic	XYZ_CWoLa_FullRun2				HDBS-2018-59
Semi-leptonic Final States
VV semi-leptonic	T. Nobe, L. Xu	atlas-phys-hdbs-VVres-semileptonic	VVSemileptonicFullRun2	HIGG5D1 HIGG5D2 HIGG2D4	CxAOD	ResonanceFinder	HDBS-2018-10

Publications based on 2015+2016 dataset

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Analysis	Meeting	Contact(s)	eGroup	Wiki	Analysis Note, Paper, CONF Note	GLANCE	Derivation
Inclusive Analyses
General search	Fri 11h00	(2015) S. Amoroso, M. Rotaru	atlas-phys-susy-generalsearch	GeneralSearch	arXiv:1807.07447	EXOT-2016-38	SUSY1
WW/WZ/ZZ/VH resonances
VBF/VBS WW→ lνlν		(2015) J. Zhu	atlas-phys-exotics-diboson-vbf atlas-phys-higgs-hww-highmass	VbfVbs2015	ATLAS-CONF-2016-053 (2015)
WZ → lνll	Mon 15h30	J. Manjarres,S. Hassani	atlas-phys-exotics-vvres-run2-lvll	WZlvllSearchRun2	arXiv:1806.01532	EXOT-2016-11	HIGG2D1
ZV → llqq/vvqq	Thurs 14h00	F. Dias F. Lo Sterzo L. Xu	atlas-phys-higgs-exotics-VV-llqqvvqq	DibosonResonancesllqqvvqq2016	arXiv:1708.09638	EXOT-2016-29	EXOT12 HIGG5D1
WV → lνqq	Tues 17h00	T. Nobe	atlas-phys-exotics-vvres-run2-lvqq-llqq	DibosonResonanceslvqq2015 DibosonResonanceslvqq2016	arXiv:1710.07235	EXOT-2016-28	EXOT11 HIGG5D2
VV→ JJ	Thurs 14h30	Y. Gao	atlas-phys-exotics-vvres-run2-JJ	DibosonResonancesJJ2015, DibosonResonancesJJ2016	arXiv:1708.04445	EXOT-2016-19	EXOT3
VH semileptonic	Tues 15h00	G. Halladjian, S. Argyropoulos	atlas-phys-higgs-exotics-VHreso-lepbb	VhResonances2015, VhResonancesLepbb2016	arxiv:1712.06518	EXOT-2016-10	HIGG5D1 HIGG5D2 HIGG2D4
VH → qqbb	Thurs 16h00	I. Ochoa	atlas-phys-exotics-VHreso-run2-qqbb	VhqqbbResonances2015 VhqqbbResonances2016	arXiv:1707.06958	EXOT-2016-12	EXOT3
Vγ /Hγ	Wed 13h30	Z. Liang, S. Li	atlas-phys-exotics-Xgamma-run2	VgammaResonanceSearches2015 VgammaResonanceSearches2016	arXiv:1805.01908	EXOT-2016-30	EXOT3
Combination	Wed 17h00	V. Cavaliere, R. Camacho	atlas-phys-exotics-vv-vh-res-run2-comb	2015: DBCombRun2 , 2016: VVVHCombRun2	arXiv:1808.02380	EXOT-2017-31
Other
W' → Xh → JJ		K. Iordanidou			arXiv:1709.06783	EXOT-2017-04	EXOT3
A → ZH (not 125)	Fri 14h00	X. Sun	atlas-phys-higgs-AZH-analysis	AZH_run_2	arXiv:1804.01126	EXOT-2016-34	HIGG2D4
HH → 4b	Fri 14h30	M. Kagan D. Wardrope, Jana Schaarschmidt	atlas-phys-exotics-diboson4b	XhhCommon	arXiv:1804.06174	EXOT-2016-31	EXOT8

Run 1: Publications with the 8 TeV dataset

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Analysis	Meeting	Contact(s)	eGroup	Wiki	Analysis Note, Paper, CONF Note	EdBoard	Public Plots
Inclusive Analyses
SS dilepton	informal meeting	E. Lytken, K. Hamano	atlas-phys-exotics-2012ssdilepton	PrelimAnal2012	2013-324 ( JHEP draft)	Glance	EXOT-2012-25 (JHEP)
Multi(>=3)-leptons	Informal meeting	P.O. Deviveiros	atlas-phys-exotics-multilepton	MultiLeptons8TeV	2013-651 ( CONF draft) 2014-236 ( JHEP draft)	Glance ( CONF)	EXOT-2012-20 (JHEP) ATLAS-CONF-2013-070
Mono-Z(ll) dark matter	Informal meeting	A. Nelson	atlas-phys-exotics-monoz	ZllDarkMatter	2013-338 ( PRL draft)	Glance	EXOT-2012-26 (PRD)
Heavy Leptons
Heavy neutrino	Informal meeting	J. Klinger	atlas-phys-exotics-majorana	WrHeavyMajoranaNeutrinoAnalysis2012	2013-810 ( Paper draft)	Glance	EXOT-2014-24 (JHEP)
Type-III Seesaw: dilepton	Informal meeting	F. De Lorenzi	atlas-phys-exotics-t3seesaw		2014-273 ( PRL Draft)	Glance	EXOT-2014-07 (PRD)
Type-III Seesaw: 3+ leptons	Informal meeting	L. Wiik-Fuchs, D. Yu	atlas-phys-exotics-t3seesaw		2014-344 ( JHEP draft)	Glance ( CONF)	EXOT-2014-08 (JHEP) ATLAS-CONF-2013-019
WW/WZ/ZZ resonances
WZ→ lνll		H. Wang	atlas-phys-exotics-vvres-lvll	20fb-1 WZResonanceSearchAt8TeVFull2012 13fb-1 WZResonanceSearchAt8TeV	2013-1452 (PLB Draft)	Glance	EXOT-2013-07 (PLB) ATLAS-CONF-2013-015 (13 fb-1)
ZV → llqq	Informal meeting	K. Terashi	atlas-phys-exotics-vvres-2l2j	DibosonResonanceslljjWithllJ2012 DibosonResonancesLLJJ2013	2013-1556	Glance	EXOT-2013-06 (EPJC) ATLAS-CONF-2012-150 (7.2 fb-1)
WV → lνqq	Informal meeting	A. Ruiz Martinez	atlas-phys-exotics-vvres-lvjj	DibosonResonanceslvjj2012	2013-486 ( Paper Draft)	Glance	EXOT-2013-01 (EPJC)
VV→ JJ	Informal meeting	E.Kajomovitz	atlas-phys-exotics-dbres-JJ	DibosonResonancesJJ2012	Search note ( JHEP Draft) Boson tagging note	Glance	EXOT-2013-08 (JHEP)
VV Combination	Informal Meeting	M. Hance	atlas-phys-exotics-dbx-comb		2014-1330 ( Paper Draft)	Glance	EXOT-2014-18 (PLB) ATLAS-CONF-2015-045
VH/Vjj	Informal meeting	V. Cavaliere	atlas-phys-exotics-dbx-Vjj	TechnicolorSearch2012	2013-101 ( CONF draft) 2014-213 ( EPJC Draft)	Glance ( CONF)	EXOT-2013-23 (EPJC) ATLAS-CONF-2013-074
Wgamma/Zgamma	Informal meeting	H. Abreu	atlas-phys-exotics-vgamma	VgammaResonanceSearches	2013-1044, Summited to PLB	Glance	EXOT-2013-09 (PLB)
Exotic Higgs decays
H→ ZZdark		T. Lagouri	atlas-phys-higgs-hzprimezprime4l		2013-1308 ( Paper Draft)	Glance	EXOT-2013-15 (PRD) ATLAS-CONF-2015-003
H→ ZdarkZdark			atlas-phys-higgs-hzprimezprime4l		2014-115 ( Paper Draft)	Glance	EXOT-2013-15 (PRD) ATLAS-CONF-2015-003

Run 1 Archive

Latest HL-LHC Prospect Studies

Channel	Public Lnk	Glance
VV Search and Measurement	ATL-PHYS-PUB-2018-022	PUB-EXOT-2018-24
HH → 4b	ATL-PHYS-PUB-2018-028	PUB-EXOT-2018-42

Signal models and main MC generators

Signal Models Theory Model Contact Ref. VBF Charged Higgs Haleh Hadavand arXiv:1507.02549 Heavy Higgs bosons/Scalar resonances   arXiv:0706.4311 Heavy Vector Triplet Georges Azuelos arXiv:1402.4431 Bulk RS Graviton Stephane Willocq arXiv:0701186

Monte Carlo Generators MC4BSM DEWSB Technicolor: Strawman model in PYTHIA6/ PYTHIA8 Minimal Walking TC: in process of implementation in CalcHEP and SHERPA HVT models in HVT VB Scattering: Helac-PHEGAS, VBFNLO, WHIZARD

Resources

• Git: repository
• On EOS: /eos/atlas/atlascerngroupdisk/phys-hdbs/dbl/
• HDBS approval steps: twiki
• Guidelines for contacts: twiki
• Blinding policy: link
• Guidelines for significant digits: document
• Material from previous publications (e.g. workspaces) can be found on the phys-hdbs/dbl eos space and on tape:
  • 2015 combination: group.phys-exotics.combination_dbx_2015

MC Validation Requirements

• Guidelines for validation of new MC samples (to be presented at a DBL meeting): twiki
• Please check the PMG known-issues page to make sure generator versions and Athena releases are valid: twiki
• There is also a dedicated HDBS area with known issues: twiki

CxAOD framework

• Twiki: CxAOD Framework
• Mailing list: atlas-phys-higgs-hsg5framework
• Volunteers from the DBL group: A, Hoenle, D. Lack, T. Nobe, V. Pascuzzi, I. Siral, M. Yamatani, M. Sousa

Statistical Frameworks and Guidelines

• Twiki: Diboson Resonances Statistical Framework
• Statistical terms introduction: N. Berger talk
• Recommendations on likelihood checks:
  • page
  • N. Morange talk
• Everything you need to know about pulls: link
• Better than zero problem: reading
• Recommendations for global significances: guidelines from the statistics forum

Analysis methods

• How to combine MC16 samples? CombiningMC16
• Methods for jet triggers efficiency evaluation: Steven Schramm's talk
• Asymptotic significance formulae for optimization: link

Theory Uncertainties

• Signal uncertainties (a complete description lives here):
  • Consider only PDF and ISR/FSR impact on the selection acceptance, not on the x-section!
  • For PDFs, follow the recommendations from PMG https://twiki.cern.ch/twiki/bin/view/AtlasProtected/PdfRecommendations#Using_LHAPDF

Relevant hands-on sessions and tutorials

• RECAST by L. Heinrich: link
• Trigger studies by B. Carlson and E. Tolley: agenda
• Functional-form fits (including functional decomposition, gaussian processes): agenda

-- InesOchoa - 2020-05-29