Upgrade Physics and Performance Studies

This page features public results from studies related to the LHC and ATLAS upgrade programmes.

Most contributions are released in the form of short public notes and are listed in the section Filtered Documents. Technical design reports and similarly-relevant notes are listed in a separate section here, as well as being listed from the main ATLAS public page. Preliminary standalone plots, mostly regarding the expected performance of the detector after a given upgrade, are reported in the section Preliminary plots

Filter Documents

Select the desired keywords to filter the results.
Selections within a section row are combined with a logical OR, while selections among different section rows are combined with a logical AND.

Quick links: Papers Confnotes Pubnotes

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TDRs and other notes

This section contains links to TDRs and other similarly-relevant notes on ATLAS phase-I and phase-II upgrade projects. See also the main ATLAS public page.

For convenience, links to preliminary plots that are relevant for any specific upgrade project are also linked here as "Other Plots", as well as in the Preliminary plots section.

For Phase-II documents, each item can be expanded to show the list of physics projections included in the document, as well as any relevant link including more information or updated results, if available.

Phase-I Upgrades
Short title	Date	Links
Letter of Intent	01-DEC-2011	CERN-LHCC-2011-012
Muon New Small Wheel TDR	03-JUN-2013	CERN-LHCC-2013-006, Other Plots
Fast Tracker (FTK) TDR	03-JUN-2013	CERN-LHCC-2013-007, Other Plots
Liquid Argon Calorimeter TDR	01-SEP-2013	CERN-LHCC-2013-017, Other Plots
TDAQ system TDR	20-SEP-2013	CERN-LHCC-2013-018, Other Plots

Phase-II (HL-LHC) Upgrades
Short title	Date	Links
ATLAS Phase-II LoI	29-DEC-2012	CERN-LHCC-2012-022
	Physics projection	Additional links
	Higgs couplings	ATL-PHYS-PUB-2013-014
	H H -> b b gamma gamma	ATL-PHYS-PUB-2017-001
	VBS Zjj
	SUSY (squark, gluino, 3rd gen., ewk)	ATL-PHYS-PUB-2014-010
	Z' -> t tbar (ttbar resonance)	ATL-PHYS-PUB-2017-002
	Z' -> l l	Muon TDR
	FCNC top decays (t -> q Z, t -> q gamma)	ATL-PHYS-PUB-2016-019
ATLAS Scoping Document	25-SEP-2015	CERN-LHCC-2015-020
	Physics projection	Additional links
	H -> ZZ -> 4mu	Muon TDR (acceptance only)
	VBF H -> ZZ -> 4l	ATL-PHYS-PUB-2016-008
	VBF H -> WW	ATL-PHYS-PUB-2016-018, Itk Strip TDR
	VBS ssWW	ATL-PHYS-PUB-2017-023
	EWK SUSY 1L + 2b	ATL-PHYS-PUB-2015-032
	X -> H H -> 4b (resonant)
Itk Strip TDR	13-APR-2017	CERN-LHCC-2017-005, Other Plots
	Physics projection	Additional links
	VBF H -> WW
	VBS ssWW	ATL-PHYS-PUB-2017-023
	H -> mu mu	Muon TDR (resolution only)
	H H -> 4b (non-resonant)	ATL-PHYS-PUB-2016-024
	H H -> b b gamma gamma	ATL-PHYS-PUB-2017-001
	Z' -> t tbar (ttbar resonance)	ATL-PHYS-PUB-2017-002
Muons TDR	15-DEC-2017	CERN-LHCC-2017-017
	Physics projection	Additional links
	W' -> mu nu
	H -> ZZ -> 4l (differential)
	H -> mu mu
	VBS ssWW	ATL-PHYS-PUB-2017-023
Liquid Argon Calorimeter TDR	15-06-2018	CERN-LHCC-2017-018, Other Plots
	Physics projection	Additional links
	H -> gamma gamma (differential)
	HH -> bb gamma gamma	ATL-PHYS-PUB-2017-001
	Z' -> ee
	Z' -> t tbar	ATL-PHYS-PUB-2017-002
Tile Calorimeter TDR	15-06-2018	CERN-LHCC-2017-019, Other Plots
	Physics projection	Additional links
	Z'->tt (ttbar resonance)	ATL-PHYS-PUB-2017-002
	Long-Lived Particle decays in Calorimeter (acceptance-only)
Itk Pixel TDR	7-10-2018	CERN-LHCC-2017-021,Plots,Other Plots
	Physics projection	Additional links
	H -> Z Z -> 4mu (resolution only)
	H -> mu mu (resolution only)
	H H -> b b gamma gamma	ATL-PHYS-PUB-2017-001
	H H -> 4b (non-resonant)
	Weak mixing angle
	B-meson lifetime (resolution-only)
	SUSY LLP: disappearing track
	SUSY LLP: displaced vertices (acceptance-only)
TDAQ TDR	19-07-2018	CERN-LHCC-2017-020,Other Plots,Plots
	Physics projection	Additional links
	B->mu mu X (acceptance-only)
	B->J/Psi X (acceptance-only)
	H H -> b b tau tau

Preliminary plots

This section contains references to standalone plots made public as preliminary in specific occasions.

Short title	Upgrade phase	Links
Trigger
Trigger Software upgrade	Phase-I	Twiki
Fast TracKer (FTK)	Phase-I	Twiki
Trigger L1 Track	Phase-II	Twiki
Trigger TDAQ	Phase-II	Twiki
Detectors
New Small Wheel	Phase-I	Twiki
LAr calorimeter upgrade	Phase-I	Twiki
LAr calorimeter upgrade	Phase-II	Twiki
High Granularity Timing Detector	Phase-II	Twiki
Tile Upgrade	all	Twiki and Twiki
Itk	Phase-II	Twiki
Performance
Jet and MET Performance	Phase-II	Twiki
Tracking Performance	Phase-II	Twiki, see also Itk-Pixel and Itk-Strips
Tau Performance	Phase-II	Twiki
Heavy Flavor Tagging	Phase-II	Twiki
Muon Performance	Phase-II	General Twiki (may contain some relevant results)
Electron/Photon Performance	Phase-II	General Twiki (may contain some relevant results)
Event Displays	Phase-II	Twiki
Computing and Software	Phase-II	Twiki