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$t$ -QUARK MASS

We first list the direct measurements of the top quark mass which employ the event kinematics and then list the measurements which extract a top quark mass from the measured

t \overset{―}{t}

cross-section using theory calculations. A discussion of the definition of the top quark mass in these measurements can be found in the review “The Top Quark.''
For earlier search limits see PDG 1996, Physical Review D54 1 (1996). We no longer include a compilation of indirect top mass determinations from Standard Model Electroweak fits in the Listings (our last compilation can be found in the Listings of the 2007 partial update). For a discussion of current results see the reviews "The Top Quark" and "Electroweak Model and Constraints on New Physics."

$t$ -Quark Pole Mass from Cross-Section Measurements

VALUE (GeV)

DOCUMENT ID

TECN

COMMENT

172.4 \pm 0.7

OUR AVERAGE

173.4

_{- 2.0}^{+ 1.8}

LHC

e^{\pm} μ^{\mp}

pair; ATLAS+CMS combined

172.93

\pm 1.36

CMS

t \overset{―}{t}

+jet;

ℓ^{\pm} ℓ^{\mp}

mode

173.1

_{- 2.1}^{+ 2.0}

ATLS

e

+

μ

+ 1 or 2

b

-jets

171.1

\pm 0.4

\pm 0.9

_{- 0.3}^{+ 0.7}

ATLS

ℓ + {E̸}_{T}

+

\geq

5

j

(2

b - j

)

170.6

\pm 2.7

CMS

ℓ

+

\geq

1j

172.8

\pm 1.1

_{- 3.1}^{+ 3.3}

D0

ℓ ℓ

,

ℓ

+jets channels

173.7

_{- 2.1}^{+ 2.3}

ATLS

ℓ + {E̸}_{T} + \geq

5j (2

b

-tag)

• • We do not use the following data for averages, fits, limits, etc. • •

170.5

\pm 0.8

CMS

t \overset{―}{t}

normalized multi-differential cross sections

173.2

\pm 0.9

\pm 0.8

\pm 1.2

ATLS

e

+

μ

+

\geq 1 b

jets

173.8

_{- 1.8}^{+ 1.7}

CMS

e

+

μ

+

{E̸}_{T}

+

\geq

0j

172.9

_{- 2.6}^{+ 2.5}

ATLS

p p

at

\sqrt{s}

= 7, 8 TeV

176.7

_{- 2.8}^{+ 3.0}

CMS

p p

at

\sqrt{s}

= 7 TeV

¹	AAD 2023AY based on 5 fb $^{- 1}$ and 20 fb $^{- 1}$ of $p p$ data at $\sqrt{s}$ = 7 TeV and 8 TeV, respectively. The result is obtained from the combined inclusive cross section measurements and the NNLO+NNLL predictions fixing $α_{s} (m_{Z}$ ) = 0.118.

²

TUMASYAN 2023R based on 36.3 fb

^{- 1}

of data in

p p

collisions at

\sqrt{s}

= 13 TeV. Normalized

t \overset{―}{t}

+ 1-jet differential cross section as a function of

t \overset{―}{t} j

invariant mass is measured in the dilepton mode. The unfolded parton-level distribution is compared with the NLO QCD prediction. The result depends on the PDF and ABMP16NLO is used.

³	AAD 2020Q based on 36.1 fb $^{- 1}$ of $p p$ data at $\sqrt{s}$ = 13 TeV. The result is obtained from the inclusive cross section measurement and the NNLO+NNLL prediction.

⁴

AAD 2019G based on 20.2 fb

^{- 1}

of data in

p p

collisions at

\sqrt{s}

= 8 TeV. Normalized

t \overset{―}{t}

+ 1-jet differential cross section as a function of

t \overset{―}{t} j

invariant mass is measured in the

ℓ

+ jets mode. The unfolded parton-level distribution is compared with the NLO QCD prediction. The three errors are from statitics, systematics, and theory.

⁵	SIRUNYAN 2017W based on 2.2 fb $^{- 1}$ of $p p$ data at $\sqrt{s}$ = 13 TeV. Events are categorized according to the jet multiplicity and the number of $b$ -tagged jets. The pole mass is obtained from the inclusive cross section measurement and the NNLO prediction.

⁶	ABAZOV 2016F based on 9.7 fb $^{- 1}$ of data in $p \overset{―}{p}$ collisions at $\sqrt{s}$ = 1.96 TeV. The result is obtained from the inclusive cross section measurement and the NNLO+NNLL prediction.

⁷

AAD 2015BW based on 4.6 fb

^{- 1}

of

p p

data at

\sqrt{s}

= 7 TeV. Uses normalized differential cross section for

t \overset{―}{t}

+ 1 jet as a function of the inverse of the invariant mass of the

t \overset{―}{t}

+ 1 jet system. The measured cross section is corrected to the parton level. Then a fit to the data using NLO + parton shower prediction is performed.

⁸

SIRUNYAN 2020BV based on 35.9 fb

^{- 1}

of

p p

data at

\sqrt{s}

= 13 TeV. The error accounts for both experimental and theoretical uncertainties. Events containing two oppositely charged leptons are used. The pole mass is particularly sensitive to the

t \overset{―}{t}

invariant mass distribution close to the threshold. However, the Coulomb and soft gluon resummation effects are not taken into account, hence, an additional theoretical uncertainty of order +1 GeV is assumed.

⁹

AABOUD 2017BC based on 20.2 fb

^{- 1}

of

p p

data at

\sqrt{s}

= 8 TeV. The pole mass is extracted from a fit of NLO predictions to eight single lepton and dilepton differential distributions, while simultaneously constraining uncertainties due to PDFs and QCD scales. The three reported uncertainties come from statistics, experimental systematics, and theoretical sources.

¹⁰	KHACHATRYAN 2016AW based on 5.0 fb $^{- 1}$ of $p p$ collisions at 7 TeV and 19.7 fb $^{- 1}$ at 8 TeV. The 7 TeV data include those used in CHATRCHYAN 2014. The result is obtained from the inclusive cross sections.

¹¹	AAD 2014AY used $σ (t \overset{―}{t})$ for $e μ$ events. The result is a combination of the measurements $m_{t}$ = $171.4$ $\pm 2.6$ GeV based on 4.6 fb $^{- 1}$ of data at 7 TeV and $m_{t}$ = $174.1$ $\pm 2.6$ GeV based on 20.3 fb $^{- 1}$ of data at 8 TeV.

¹²	CHATRCHYAN 2014 used $σ (t \overset{―}{t})$ from $p p$ collisions at $\sqrt{s}$ = 7 TeV measured in CHATRCHYAN 2012AX to obtain $m_{t}$ (pole) for $α_{s} (m_{Z}$ ) = $0.1184$ $\pm 0.0007$ . The errors have been corrected in KHACHATRYAN 2014K.

JHEP 2307 213

Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at

\sqrt{s} = 7

and 8 TeV

JHEP 2307 077

Measurement of the top quark pole mass using

t \overset{―}{t}

+jet events in the dilepton final state in proton-proton collisions at

\sqrt{s}

= 13 TeV

EPJ C80 528

Measurement of the

t \bar{t}

production cross-section and lepton differential distributions in

e μ

dilepton events from

p p

collisions at

\sqrt{s} = 13 TeV

with the ATLAS detector

EPJ C80 658

Measurement of

t \bar{t}

normalised multi-differential cross sections in pp collisions at

\sqrt{s} = 13

TeV, and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions

JHEP 1911 150

Measurement of the top-quark mass in

t \bar{t} + 1

-jet events collected with the ATLAS detector in

p p

collisions at

\sqrt{s} = 8

TeV

EPJ C77 804

Measurement of Lepton Differential Distributions and the Top Quark Mass in

t \overset{―}{t}

Production in

p p

Collisions at

\sqrt{s}

=8 TeV with the ATLAS Detector

JHEP 1709 051

Measurement of the

t \overset{―}{t}

Production Cross Section using Events with One Lepton and at Least One Jet in

p p

Collisions at

\sqrt{s}

= 13 TeV

PR D94 092004

Measurement of the Inclusive

t \overset{―}{t}

Production Cross Section in

p \overset{―}{p}

Collisions at

\sqrt{s}

= 1.96 TeV and Determination of the Top Quark Pole Mass

JHEP 1608 029

Measurement of the

t - \overset{―}{t}

Production Cross Section in the

e - μ

Channel in Proton-Proton Collisions at

\sqrt{s}

= 7 and 8 TeV

JHEP 1510 121

Determination of the Top-Quark Pole Mass using

t \overset{―}{t}

+ 1-Jet Events Collected with the ATLAS Experiment in 7 TeV

p p

Collisions

EPJ C74 3109

Measurement of the

t \overset{―}{t}

Production Cross-Section using

e μ

Events with

b

-Tagged Jets in

p p

Collisions at

\sqrt{s}

= 7 and 8 TeV with the ATLAS Detector

PL B728 496

Determination of the Top-Quark Pole Mass and Strong Coupling Constant from the

t \overset{―}{t}

Production Cross Section in

p p

Collisions at

\sqrt{s}

= 7 TeV

Except where otherwise noted, content of the 2024 Review of Particle Physics is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2024. See LBNL disclaimers.