Top Quark Properties Group

Convenors: Cécile Deterre and Simon Head

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Introduction

The aim of this subgroup is to study the properties of the top quark except for its mass (for which there is a dedicated subgroup). Most of the analyses use top quark pair events which decay through the single lepton or di-lepton modes. Additional final states are considered for the searches for Flavour Changing Neutral Currents (FCNC) and other rare processes. The top properties group also follows searches for new physics in top pair production and similar final states, these are usually formally hosted in our sister subgroup from Exotics, the HQT group, with occasional shared meetings and joint Top/Exotics approval.

Organization

• Mailing list: hn-atlas-top-properties-group@cernSPAMNOTch
• Meetings: Thursday, 14:00 - 16:00 (link to Indico)

Analyses

Ongoing

Analysis	Channel	Int. Luminosity [fb-1]	Time scale	Note/paper	More information	Comments	Status
Search for FCNC	t -> Hq (H->bb, q=u,c), combination with H->gamma gamma and H->WW	20 (8TeV)		ATLAS-TOPQ-2014-14	Glance entry twiki INT note paper draft	Editor: Aurelio Juste Rozas	Outline presentation: 7/08/2014 Last status: 22/05/2015 Approval: 27/05/2015 Approval, multilepton and combination: 31/07/2015
Search for FCNC	t -> qgamma	20 (8TeV)					Last status: 30/04/2015
Search for FCNC t -> Zq	trilepton	20 (8TeV)		ATLAS-TOPQ-2014-08	Glance Entry INT note Paper Draft	Editors: Filipe Almeida Veloso, Bruno Galhardo	Pre-approval: 31/07/2014 Last status: 30/10/2014 Approval: 18/12/2014
Search for FCNC t -> Zq	dilepton	20 (8TeV)			INT note	Editors: Archil Durglishvili, Tamar Djobava, Maia Mosidze	Last Status Presentation: 16/07/2015
Charge asymmetry	dilepton	20 (8 TeV)	top 2015	ATLAS-TOPQ-2015-08	Glance Entry INT note paper draft	Editors: Roger Naranjo, Yvonne Peters, James Howarth, Cécile Deterre	Outline presentation: 24/4/2014 Pre-approval: 9/07/2015 Approval: 31/07/2015
Charge asymmetry	single lepton	20 (8 TeV)		ATLAS-TOPQ-2014-16	Glance Entry INT note	Editors: Allison McCarn, Tom Schwarz, Francesco Rubbo	Pre-approval: 27/11/2014 Approval: 17/12/2014
Charge asymmetry	boosted ljets	20 (8 TeV)	top 2015	ATLAS-TOPQ-2015-10	Glance Entry INT note	Editors: Allison McCarn, Marcel Vos	Pre-approval: 23/07/2015 Approval: 5/08/2015
Spin correlation (differential)	dilepton	~5 (7 TeV)		ATLAS-TOPQ-2013-10 - paper	Glance Entry INT note	Editors: Chengguang Zhu, Emmanuel Monnier, Simon Head	Pre-approval: 12/6/2014 Approval: 15/10/2014
Spin correlation (unfolded)	dilepton	20 (8 TeV)					Last update: 4/06/2015
top polarization	single and dilepton	20 (8 TeV)			INT note (dilepton)		Last status (ljets): 16/07/2015 Outline (dil): 05/03/2015
tt+gamma	single lepton	20 (8 TeV)			twiki		Last status: 2/07/2015
ttZ/W	trilepton	20 (8 TeV)		ATLAS-TOPQ-2013-05	twiki INT note Glance Entry		Last status: 18/09/2014
ttZ/W	OS dilepton	20 (8 TeV)		ATLAS-TOPQ-2013-05	twiki INT note Glance Entry		Last status: 18/09/2014
ttZ/W	SS dilepton	20 (8 TeV)		ATLAS-TOPQ-2013-05	INT note twiki Glance Entry		Unblinding approval: 12/2/2015
ttZ/W	4 leptons	20 (8 TeV)		ATLAS-TOPQ-2013-05	twiki INT note Glance Entry		Unblinding approval: 05/02/2015 Top approval: 12/02/2015 Last status: 05/02/2015
ttZ/W	combination	20 (8 TeV)		ATLAS-TOPQ-2013-05	twiki INT note Glance Entry paper draft		Approval: 10/06/2015
W polarization in top decays	single lepton	~5 (7 TeV)			twiki INT note	Editors: Miguel Fiolhais, Andrea Knue	Last Status Presentation: 28/08/2014
CP violation in top	single lepton	20 (8 TeV)					Last Status Presentation: 6/08/2015

Approved

• List of ATLAS public/conference notes on top properties.
• List of ATLAS publications on top properties.

Combinations

• Wtb vertex structure (joint with single top): twiki, kick-off meeting (24/06/2013)

Dedicated workshops

• Spin correlation analyses: twiki agenda

Further information

• Link to analyses aimed at Winter 2011/12.
• Link to analyses aimed at Summer 2011.
• Link to analyses aimed at Winter 2010/11.
• Link to analyses with longer time scales.
• Link to uncovered analyses.
• Link to analyses related to top quark properties performed outside the top properties group.
• Link to plans and time scales for analyses in the top properties group.

Tools and Information

• Conference schedules and deadlines can be found here.
• A recommendation how to evaluate statistical and systematic uncertainties can be found here.
• A list of common systematic uncertainties can be found here.
• the top properties group supports the commonly produced top D3PDs. More information can be found here.
• An example of settings used for plots can be found here. The proposed color code follows that of the cross-section. We propose to keep the order of contributions, but to remove those which do not appear in your analysis.

%RESPONSIBLE% Frederic Deliot and James Ferrando
%REVIEW% Deliot/Ferrando - 26 Apr 2014