#### MASS LIMITS for Leptoquarks from Pair Production

These limits rely only on the color or electroweak charge of the leptoquark.

VALUE (GeV) CL% DOCUMENT ID TECN  COMMENT
$> 1480$ 95 1
 2021 AG
ATLS Scalar LQ. B( ${{\mathit t}}{{\mathit e}}$ ) = 1
$> 1470$ 95 2
 2021 AG
ATLS Scalar LQ. B( ${{\mathit t}}{{\mathit \mu}}$ ) = 1
$> 1190$ 95 3
 2021 AW
ATLS Scalar LQ. B( ${{\mathit b}}{{\mathit \tau}}$ ) = 1
$> 1030$ 95 4
 2021 AW
ATLS Scalar LQ. B( ${{\mathit t}}{{\mathit \tau}}$ ) = 1
$> 1760$ 95 5
 2021 AW
ATLS Vector LQ. ${{\mathit \kappa}}$ = 1. B( ${{\mathit b}}{{\mathit \tau}}$ ) = 1
$> 1260$ 95 6
 2021 S
ATLS Scalar LQ. B( ${{\mathit b}}{{\mathit \nu}}$ ) = 1
$\bf{> 1430}$ 95 7
 2021 T
ATLS Scalar LQ. B( ${{\mathit t}}{{\mathit \tau}}$ ) = 1
$> 950$ 95 8
 2021 J
CMS Scalar LQ. B( ${{\mathit t}}{{\mathit \tau}}$ )=B( ${{\mathit b}}{{\mathit \nu}}$ )=0.5
$> 1650$ 95 9
 2021 J
CMS Vector LQ. ${{\mathit \kappa}}$ =1, B( ${{\mathit t}}{{\mathit \nu}}$ ) = B( ${{\mathit b}}{{\mathit \tau}}$ ) = 0.5
$\bf{> 1800}$ 95 10
 2020 AK
ATLS Scalar LQ. B( ${{\mathit e}}{{\mathit q}}$ ) = 1
$\bf{> 1700}$ 95 11
 2020 AK
ATLS Scalar LQ. B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1
$> 1240$ 95 12
 2020 S
ATLS Scalar LQ. B( ${{\mathit t}}{{\mathit \nu}}$ ) = 1
$> 1185$ 95 13
 2020 A
CMS Scalar LQ. B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1
$> 1140$ 95 14
 2020 A
CMS Scalar LQ. B( ${{\mathit \nu}}{{\mathit t}}$ ) = 1
$> 1140$ 95 15
 2020 A
CMS Scalar LQ. B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1 with ${{\mathit q}}$ = ${{\mathit u}}$ , ${{\mathit d}}$ , ${{\mathit s}}$ , ${{\mathit c}}$
$> 1925$ 95 16
 2020 A
CMS Vector LQ. ${{\mathit \kappa}}$ = 1. B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1
$> 1825$ 95 17
 2020 A
CMS Vector LQ. ${{\mathit \kappa}}$ = 1. B( ${{\mathit \nu}}{{\mathit t}}$ ) = 1
$> 1980$ 95 18
 2020 A
CMS Vector LQ. ${{\mathit \kappa}}$ = 1. B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1 with ${{\mathit q}}$ = ${{\mathit u}}$ , ${{\mathit d}}$ , ${{\mathit s}}$ , ${{\mathit c}}$
$> 1400$ 95 19
 2019 AX
ATLS Scalar LQ. B( ${{\mathit e}}{{\mathit q}}$ ) = 1
$> 1560$ 95 20
 2019 AX
ATLS Scalar LQ. B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1
$>1000$ 95 21
 2019 X
ATLS Scalar LQ. B( ${{\mathit t}}{{\mathit \nu}}$ ) = 1
$>1030$ 95 22
 2019 X
ATLS Scalar LQ. B( ${{\mathit b}}{{\mathit \tau}}$ ) = 1
$>970$ 95 23
 2019 X
ATLS Scalar LQ. B( ${{\mathit b}}{{\mathit \nu}}$ ) = 1
$>920$ 95 24
 2019 X
ATLS Scalar LQ. B( ${{\mathit t}}{{\mathit \tau}}$ ) = 1
$> 1530$ 95 25
 2019 BI
CMS Scalar LQ. B( ${{\mathit \mu}}{{\mathit q}}$ )+B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1
$> 1435$ 95 26
 2019 BJ
CMS Scalar LQ. B( ${{\mathit e}}{{\mathit q}}$ )+B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1
$> 1020$ 95 27
 2019 Y
CMS Scalar LQ. B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1
$\text{none 300 - 900}$ 95 28
 2018 CZ
CMS Scalar LQ. B( ${{\mathit \tau}}{{\mathit t}}$ ) = 1
$> 1420$ 95 29
 2018 EC
CMS Scalar LQ. B( ${{\mathit \mu}}{{\mathit t}}$ ) = 1
$> 1190$ 95 30
 2018 EC
CMS Vector LQ. ${{\mathit \mu}}{{\mathit t}}$ , ${{\mathit \tau}}{{\mathit t}}$ , ${{\mathit \nu}}{{\mathit b}}$
$> 1100$ 95 31
 2018 U
CMS Scalar LQ. B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1
$> 980$ 95 32
 2018 U
CMS Scalar LQ. B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1 with ${\mathit {\mathit q}}$ = ${\mathit {\mathit u}},{\mathit {\mathit d}},{\mathit {\mathit s}},{\mathit {\mathit c}}$
$> 1020$ 95 33
 2018 U
CMS Scalar LQ. B( ${{\mathit \nu}}{{\mathit t}}$ ) = 1
$>1810$ 95 34
 2018 U
CMS Vector LQ. $\kappa$=1. LQ $\rightarrow$ ${{\mathit b}}{{\mathit \nu}}$
$>1790$ 95 35
 2018 U
CMS Vector LQ. $\kappa$=1. LQ $\rightarrow$ ${{\mathit q}}{{\mathit \nu}}$ with ${\mathit {\mathit q}}$ = ${\mathit {\mathit u}},{\mathit {\mathit d}},{\mathit {\mathit s}},{\mathit {\mathit c}}$
$>1780$ 95 36
 2018 U
CMS Vector LQ. $\kappa$=1. LQ $\rightarrow$ ${{\mathit t}}{{\mathit \nu}}$
$>740$ 95 37
 2017 J
CMS Scalar LQ. B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1
$> 850$ 95 38
 2017 H
CMS Scalar LQ. B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1
$> 1050$ 95 39
 2016 G
ATLS Scalar LQ. B( ${{\mathit e}}{{\mathit q}}$ ) = 1
$> 1000$ 95 40
 2016 G
ATLS Scalar LQ. B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1
$> 625$ 95 41
 2016 G
ATLS Scalar LQ. B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1
$\text{none 200 - 640}$ 95 42
 2016 G
ATLS Scalar LQ. B( ${{\mathit \nu}}{{\mathit t}}$ ) = 1
$> 1010$ 95 43
 2016 AF
CMS Scalar LQ. B( ${{\mathit e}}{{\mathit q}}$ ) = 1
$> 1080$ 95 44
 2016 AF
CMS Scalar LQ. B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1
$> 685$ 95 45
 2015 AJ
CMS Scalar LQ. B( ${{\mathit \tau}}{{\mathit t}}$ ) = 1
$> 740$ 95 46
 2014 T
CMS Scalar LQ. B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1
• • We do not use the following data for averages, fits, limits, etc. • •
47
 2019 BC
CMS Scalar LQ ( $\rightarrow$ ${{\mathit \mu}}{{\mathit q}}$ ) LQ ( $\rightarrow$ ${{\mathit X}}$ + DM)
$> 534$ 95 48
 2013 AE
ATLS Third generation
$> 525$ 95 49
 2013 M
CMS Third generation
$> 660$ 95 50
 2012 H
ATLS First generation
$> 685$ 95 51
 2012 O
ATLS Second generation
$> 830$ 95 52
 2012 AG
CMS First generation
$> 840$ 95 53
 2012 AG
CMS Second generation
$> 450$ 95 54
 2012 BO
CMS Third generation
$> 376$ 95 55
 2011 D
$> 422$ 95 56
 2011 D
$> 326$ 95 57
 2011 V
D0 First generation
$> 339$ 95 58
 2011 N
CMS Superseded by CHATRCHYAN 2012AG
$> 384$ 95 59
 2011 D
CMS Superseded by CHATRCHYAN 2012AG
$> 394$ 95 60
 2011 E
CMS Superseded by CHATRCHYAN 2012AG
$> 247$ 95 61
 2010 L
D0 Third generation
$> 316$ 95 62
 2009
D0 Second generation
$> 299$ 95 63
 2009 AF
D0 Superseded by ABAZOV 2011V
64
 2008 P
CDF Third generation
$> 153$ 95 65
 2008 Z
CDF Third generation
$> 205$ 95 66
D0 All generations
$> 210$ 95 65
 2008 AN
D0 Third generation
$> 229$ 95 67
 2007 J
D0 Superseded by ABAZOV 2010L
$> 251$ 95 68
 2006 A
D0 Superseded by ABAZOV 2009
$> 136$ 95 69
 2006 L
$> 226$ 95 70
 2006 T
CDF Second generation
$> 256$ 95 71
 2005 H
D0 First generation
$>117$ 95 66
 2005 I
CDF First generation
$> 236$ 95 72
 2005 P
CDF First generation
$>99$ 95 73
 2003 R
OPAL First generation
$>100$ 95 73
 2003 R
OPAL Second generation
$>98$ 95 73
 2003 R
OPAL Third generation
$>98$ 95 74
 2002
D0 All generations
$>225$ 95 75
 2001 D
D0 First generation
$>85.8$ 95 76
 2000 M
OPAL Superseded by ABBIENDI 2003R
$>85.5$ 95 76
 2000 M
OPAL Superseded by ABBIENDI 2003R
$>82.7$ 95 76
 2000 M
OPAL Superseded by ABBIENDI 2003R
$>200$ 95 77
 2000 C
D0 Second generation
$>123$ 95 78
 2000 K
CDF Second generation
$> 148$ 95 79
 2000 K
CDF Third generation
$>160$ 95 80
 1999 J
D0 Second generation
$>225$ 95 81
 1998 E
D0 First generation
$>94$ 95 82
 1998 J
D0 Third generation
$> 202$ 95 83
 1998 S
CDF Second generation
$>242$ 95 84
 1998
First generation
$>99$ 95 85
 1997 F
CDF Third generation
$>213$ 95 86
 1997 X
CDF First generation
$>45.5$ 95 87, 88
 1993 J
DLPH First + second generation
$>44.4$ 95 89
 1993 M
L3 First generation
$>44.5$ 95 89
 1993 M
L3 Second generation
$>45$ 95 89
 1992
ALEP Third generation
$\text{none 8.9 - 22.6}$ 95 90
 1990
AMY First generation
$\text{none 10.2 - 23.2}$ 95 90
 1990
AMY Second generation
$\text{none 5 - 20.8}$ 95 91
 1987 B
$\text{none 7 - 20.5}$ 95 92
 1986 B
CELL
 1 AAD 2021AG search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit e}}$ . See their Fig. 6 for exclusion limit on B( ${{\mathit t}}{{\mathit e}}$ ) as function of ${{\mathit M}_{{LQ}}}$ .
 2 AAD 2021AG search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit \mu}}$ . See their Fig. 6 for exclusion limit on B( ${{\mathit t}}{{\mathit \mu}}$ ) as function of ${{\mathit M}_{{LQ}}}$ .
 3 AAD 2021AW search for scalar leptoquarks decaying to ${{\mathit b}}{{\mathit \tau}}$ . See their Fig. 9 for exclusion contour in B( ${{\mathit b}}{{\mathit \tau}}$ )$−{{\mathit M}_{{LQ}}}$ plane.
 4 AAD 2021AW search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit \tau}}$ . See their Fig. 9 for exclusion contour in B( ${{\mathit t}}{{\mathit \tau}}$ )$−{{\mathit M}_{{LQ}}}$ plane.
 5 AAD 2021AW search for ${{\mathit \kappa}}$ = 1 vector leptoquarks decaying to ${{\mathit b}}{{\mathit \tau}}$ . See their Fig. 10 for exclusion contour in B( ${{\mathit b}}{{\mathit \tau}}$ )$−{{\mathit M}_{{LQ}}}$ plane and for limit on ${{\mathit \kappa}}$ = 0 vector leptoquarks.
 6 AAD 2021S search for scalar leptoquarks decaying to ${{\mathit b}}{{\mathit \nu}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. The limit above assumes B( ${{\mathit b}}{{\mathit \nu}}$ ) = 1. For B( ${{\mathit b}}{{\mathit \nu}}$ ) = 0.05, the limit becomes 400 GeV.
 7 AAD 2021T search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit \tau}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. The limit above assumes B( ${{\mathit t}}{{\mathit \tau}}$ ) = 1. For B( ${{\mathit t}}{{\mathit \tau}}$ ) = 0.5, the limit becomes 1220 GeV. See their Fig. 15b for limits on B( ${{\mathit t}}{{\mathit \tau}}$ ) as a function of leptoquark mass.
 8 SIRUNYAN 2021J search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit \tau}}$ and ${{\mathit b}}{{\mathit \nu}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV.
 9 SIRUNYAN 2021J search for vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ and ${{\mathit b}}{{\mathit \tau}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. The limit quoted above assumes ${{\mathit \kappa}}$ = 1. If we assume ${{\mathit \kappa}}$ = 0, the limit becomes ${{\mathit M}_{{LQ}}}$ $>$ 1290 GeV.
 10 AAD 2020AK search for scalar leptoquarks decaying to ${{\mathit e}}{{\mathit q}}$ , ${{\mathit e}}{{\mathit b}}$ , ${{\mathit e}}{{\mathit c}}$ , ${{\mathit \mu}}{{\mathit q}}$ , ${{\mathit \mu}}{{\mathit b}}$ , ${{\mathit \mu}}{{\mathit c}}$ . The quoted limit assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1. See their Fig. 9 for limits on B( ${{\mathit e}}{{\mathit q}}$ ), B( ${{\mathit e}}{{\mathit b}}$ ), B( ${{\mathit e}}{{\mathit c}}$ ), B( ${{\mathit \mu}}{{\mathit q}}$ ), B( ${{\mathit \mu}}{{\mathit b}}$ ), B( ${{\mathit \mu}}{{\mathit c}}$ ) as a function of leptoquark mass.
 11 AAD 2020AK search for scalar leptoquarks decaying to ${{\mathit e}}{{\mathit q}}$ , ${{\mathit e}}{{\mathit b}}$ , ${{\mathit e}}{{\mathit c}}$ , ${{\mathit \mu}}{{\mathit q}}$ , ${{\mathit \mu}}{{\mathit b}}$ , ${{\mathit \mu}}{{\mathit c}}$ . The quoted limit assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1. See their Fig. 9 for limits on B( ${{\mathit e}}{{\mathit q}}$ ), B( ${{\mathit e}}{{\mathit b}}$ ), B( ${{\mathit e}}{{\mathit c}}$ ), B( ${{\mathit \mu}}{{\mathit q}}$ ), B( ${{\mathit \mu}}{{\mathit b}}$ ), B( ${{\mathit \mu}}{{\mathit c}}$ ) as a function of leptoquark mass.
 12 AAD 2020S search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV.
 13 SIRUNYAN 2020A search for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ (${{\mathit q}}$ = ${{\mathit u}}$ , ${{\mathit d}}$ , ${{\mathit s}}$ , ${{\mathit c}}$ ). The limit quoted above assumes scalar leptoquark with B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1.
 14 SIRUNYAN 2020A search for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ (${{\mathit q}}$ = ${{\mathit u}}$ , ${{\mathit d}}$ , ${{\mathit s}}$ , ${{\mathit c}}$ ). The limit quoted above assumes scalar leptoquark with B( ${{\mathit \nu}}{{\mathit t}}$ ) = 1.
 15 SIRUNYAN 2020A search for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ (${{\mathit q}}$ = ${{\mathit u}}$ , ${{\mathit d}}$ , ${{\mathit s}}$ , ${{\mathit c}}$ ). The limit quoted above assumes scalar leptoquark with B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1.
 16 SIRUNYAN 2020A search for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ (${{\mathit q}}$ = ${{\mathit u}}$ , ${{\mathit d}}$ , ${{\mathit s}}$ , ${{\mathit c}}$ ). The limit quoted above assumes vector leptoquark with B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1 and ${{\mathit \kappa}}$ = 1. If we assume ${{\mathit \kappa}}$ = 0, the limit becomes ${{\mathit M}_{{LQ}}}$ $>$ 1560 GeV.
 17 SIRUNYAN 2020A search for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ (${{\mathit q}}$ = ${{\mathit u}}$ , ${{\mathit d}}$ , ${{\mathit s}}$ , ${{\mathit c}}$ ). The limit quoted above assumes vector leptoquark with B( ${{\mathit \nu}}{{\mathit t}}$ ) = 1 and ${{\mathit \kappa}}$ = 1. If we assume ${{\mathit \kappa}}$ = 0, the limit becomes ${{\mathit M}_{{LQ}}}$ $>$ 1475 GeV.
 18 SIRUNYAN 2020A search for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ (${{\mathit q}}$ = ${{\mathit u}}$ , ${{\mathit d}}$ , ${{\mathit s}}$ , ${{\mathit c}}$ ). The limit quoted above assumes vector leptoquark with B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1 and ${{\mathit \kappa}}$ = 1. If we assume ${{\mathit \kappa}}$ = 0, the limit becomes ${{\mathit M}_{{LQ}}}$ $>$ 1560 GeV.
 19 AABOUD 2019AX search for leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1.
 20 AABOUD 2019AX search for leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1.
 21 AABOUD 2019X search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV.
 22 AABOUD 2019X search for scalar leptoquarks decaying to ${{\mathit b}}{{\mathit \tau}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV.
 23 AABOUD 2019X search for scalar leptoquarks decaying to ${{\mathit b}}{{\mathit \nu}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV.
 24 AABOUD 2019X search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit \tau}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV.
 25 SIRUNYAN 2019BI search for a pair of scalar leptoquarks decaying to ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ and to ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ final states in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. Limits are shown as a function of ${{\mathit \beta}}$ where ${{\mathit \beta}}$ is the branching fraction to a muon and a quark. For ${{\mathit \beta}}$ = 1.0 (0.5) LQ masses up to 1530 (1285) GeV are excluded. See Fig. 9 for exclusion limits in the plane of ${{\mathit \beta}}$ and LQ mass.
 26 SIRUNYAN 2019BJ search for a pair of scalar leptoquarks decaying to ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ final states in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. Limits are shown as a function of the branching fraction $\beta$ to an electron and a quark. For $\beta$ = 1.0 (0.5) LQ masses up to 1435 (1270) GeV are excluded. See Fig. 9 for exclusion limits in the plane of $\beta$ and LQ mass.
 27 SIRUNYAN 2019Y search for a pair of third generation scalar leptoquarks, each decaying to ${{\mathit \tau}}$ and a jet. Assuming B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1, leptoquark masses below 1.02 TeV are excluded.
 28 SIRUNYAN 2018CZ search for scalar leptoquarks decaying to ${{\mathit \tau}}{{\mathit t}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. The limit above assumes B( ${{\mathit \tau}}{{\mathit t}}$ ) = 1.
 29 SIRUNYAN 2018EC set limits for scalar and vector leptoquarks decaying to ${{\mathit \mu}}{{\mathit t}}$ , ${{\mathit \tau}}{{\mathit t}}$ , and ${{\mathit \nu}}{{\mathit b}}$ . The limit quoted above assumes scalar leptoquark with B( ${{\mathit \mu}}{{\mathit t}}$ ) = 1.
 30 SIRUNYAN 2018EC set limits for scalar and vector leptoquarks decaying to ${{\mathit \mu}}{{\mathit t}}$ , ${{\mathit \tau}}{{\mathit t}}$ , and ${{\mathit \nu}}{{\mathit b}}$ . The limit quoted above assumes vector leptoquark with all possible combinations of branching fractions to ${{\mathit \mu}}{{\mathit t}}$ , ${{\mathit \tau}}{{\mathit t}}$ , and ${{\mathit \nu}}{{\mathit b}}$ .
 31 SIRUNYAN 2018U set limits for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ . The limit quoted above assumes scalar leptoquark with B( ${{\mathit b}}{{\mathit \nu}}$ ) = 1. Vector leptoquarks with ${{\mathit \kappa}}$ = 1 are excluded below masses of 1810 GeV.
 32 SIRUNYAN 2018U set limits for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ . The limit quoted above assumes scalar leptoquark with B( ${{\mathit q}}{{\mathit \nu}}$ ) = 1. Vector leptoquarks with ${{\mathit \kappa}}$ = 1 are excluded below masses of 1790 GeV.
 33 SIRUNYAN 2018U set limits for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ . The limit quoted above assumes scalar leptoquark with B( ${{\mathit \nu}}{{\mathit t}}$ ) = 1. Vector leptoquarks with ${{\mathit \kappa}}$ = 1 are excluded below masses of 1780 GeV.
 34 SIRUNYAN 2018U set limits for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ . ${{\mathit \kappa}}$ = 1 and LQ $\rightarrow$ ${{\mathit b}}{{\mathit \nu}}$ are assumed.
 35 SIRUNYAN 2018U set limits for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ . ${{\mathit \kappa}}$ = 1 and LQ $\rightarrow$ ${{\mathit q}}{{\mathit \nu}}$ with ${\mathit {\mathit q}}$ = ${\mathit {\mathit u}},{\mathit {\mathit d}},{\mathit {\mathit s}},{\mathit {\mathit c}}$ are assumed.
 36 SIRUNYAN 2018U set limits for scalar and vector leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ , ${{\mathit b}}{{\mathit \nu}}$ , and ${{\mathit q}}{{\mathit \nu}}$ . ${{\mathit \kappa}}$ = 1 and LQ $\rightarrow$ ${{\mathit t}}{{\mathit \nu}}$ are assumed.
 37 KHACHATRYAN 2017J search for scalar leptoquarks decaying to ${{\mathit \tau}}{{\mathit b}}$ using ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. The limit above assumes B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1.
 38 SIRUNYAN 2017H search for scalar leptoquarks using ${{\mathit \tau}}{{\mathit \tau}}{{\mathit b}}{{\mathit b}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV. The limit above assumes B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1.
 39 AAD 2016G search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ events in collisions at $\sqrt {s }$ = 8 TeV. The limit above assumes $\mathit B$( ${{\mathit e}}{{\mathit q}}$ ) = 1.
 40 AAD 2016G search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ events in collisions at $\sqrt {s }$ = 8 TeV. The limit above assumes $\mathit B$( ${{\mathit \mu}}{{\mathit q}}$ ) = 1.
 41 AAD 2016G search for scalar leptoquarks decaying to ${{\mathit b}}{{\mathit \nu}}$ . The limit above assumes $\mathit B$( ${{\mathit b}}{{\mathit \nu}}$ ) = 1.
 42 AAD 2016G search for scalar leptoquarks decaying to ${{\mathit t}}{{\mathit \nu}}$ . The limit above assumes $\mathit B$( ${{\mathit t}}{{\mathit \nu}}$ ) = 1.
 43 KHACHATRYAN 2016AF search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ )= 1. For B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5, the limit becomes 850 GeV.
 44 KHACHATRYAN 2016AF search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1. For B( ${{\mathit \mu}}{{\mathit q}}$ ) = 0.5, the limit becomes 760 GeV.
 45 KHACHATRYAN 2015AJ search for scalar leptoquarks using ${{\mathit \tau}}{{\mathit \tau}}{{\mathit t}}{{\mathit t}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV. The limit above assumes $\mathit B$( ${{\mathit \tau}}{{\mathit t}}$ ) = 1.
 46 KHACHATRYAN 2014T search for scalar leptoquarks decaying to ${{\mathit \tau}}{{\mathit b}}$ using ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV. The limit above assumes B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1. See their Fig. 5 for the exclusion limit as function of B( ${{\mathit \tau}}{{\mathit b}}$ ).
 47 SIRUNYAN 2019BC search for scalar leptoquark (LQ) pair production in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV. One LQ is assumed to decay to ${{\mathit \mu}}{{\mathit q}}$ , while the other decays to dark matter pair and SM particles. See their Fig. 4 for limits in $\mathit M_{{\mathrm {LQ}}}−\mathit M_{{\mathrm {DM}}}$ plane.
 48 AAD 2013AE search for scalar leptoquarks using ${{\mathit \tau}}{{\mathit \tau}}{{\mathit b}}{{\mathit b}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7$~$TeV. The limit above assumes B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1.
 49 CHATRCHYAN 2013M search for scalar and vector leptoquarks decaying to ${{\mathit \tau}}{{\mathit b}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above is for scalar leptoquarks with B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1.
 50 AAD 2012H search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}$ ${{\mathit j}}{{\mathit j}}$ and ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1. For B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5, the limit becomes 607 GeV.
 51 AAD 2012O search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1. For B( ${{\mathit \mu}}{{\mathit q}}$ ) = 0.5, the limit becomes 594 GeV.
 52 CHATRCHYAN 2012AG search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1. For B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5, the limit becomes 640 GeV.
 53 CHATRCHYAN 2012AG search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1. For B( ${{\mathit \mu}}{{\mathit q}}$ ) = 0.5, the limit becomes 650 GeV.
 54 CHATRCHYAN 2012BO search for scalar leptoquarks decaying to ${{\mathit \nu}}{{\mathit b}}$ in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV. The limit above assumes B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1.
 55 AAD 2011D search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV.The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1. For B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5, the limit becomes 319 GeV.
 56 AAD 2011D search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1. For B( ${{\mathit \mu}}{{\mathit q}}$ ) = 0.5, the limit becomes 362 GeV.
 57 ABAZOV 2011V search for scalar leptoquarks using ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5.
 58 CHATRCHYAN 2011N search for scalar leptoquarks using ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5.
 59 KHACHATRYAN 2011D search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1.
 60 KHACHATRYAN 2011E search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 7 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1.
 61 ABAZOV 2010L search for pair productions of scalar leptoquark state decaying to ${{\mathit \nu}}{{\mathit b}}$ in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96 TeV. The limit above assumes B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1.
 62 ABAZOV 2009 search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1. For B( ${{\mathit \mu}}{{\mathit q}}$ ) = 0.5, the limit becomes 270 GeV.
 63 ABAZOV 2009AF search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1. For B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5 the bound becomes 284 GeV.
 64 AALTONEN 2008P search for vector leptoquarks using ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}{{\mathit b}}{{\overline{\mathit b}}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96 TeV. Assuming Yang-Mills (minimal) couplings, the mass limit is $>$317 GeV (251 GeV) at 95$\%$ CL for B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1.
 65 Search for pair production of scalar leptoquark state decaying to ${{\mathit \tau}}{{\mathit b}}$ in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$= 1.96 TeV. The limit above assumes B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1.
 66 Search for scalar leptoquarks using ${{\mathit \nu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\overline{\mathit p}}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96 TeV. The limit above assumes B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1.
 67 ABAZOV 2007J search for pair productions of scalar leptoquark state decaying to ${{\mathit \nu}}{{\mathit b}}$ in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96 TeV. The limit above assumes B( ${{\mathit \nu}}{{\mathit b}}$ ) = 1.
 68 ABAZOV 2006A search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.8 TeV and 1.96 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1. For B( ${{\mathit \mu}}{{\mathit q}}$ ) = 0.5, the limit becomes 204 GeV.
 69 ABAZOV 2006L search for scalar leptoquarks using ${{\mathit \nu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.8$~$TeV and at 1.96$~$TeV. The limit above assumes B( ${{\mathit \nu}}{{\mathit q}}$ ) = 1.
 70 ABULENCIA 2006T search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ , ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ , and ${{\mathit \nu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96$~$TeV. The quoted limit assumes B( ${{\mathit \mu}}{{\mathit q}}$ ) = 1. For B( ${{\mathit \mu}}{{\mathit q}}$ ) = 0.5 or 0.1, the bound becomes 208$~$GeV or 143$~$GeV, respectively. See their Fig.$~$4 for the exclusion limit as a function of B( ${{\mathit \mu}}{{\mathit q}}$ ).
 71 ABAZOV 2005H search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ and ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\overline{\mathit p}}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.8 TeV and 1.96 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1. For B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5 the bound becomes 234 GeV.
 72 ACOSTA 2005P search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ , ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\overline{\mathit p}}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = 1.96TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ ) = 1. For B( ${{\mathit e}}{{\mathit q}}$ ) = 0.5 and 0.1, the bound becomes 205 GeV and 145 GeV, respectively.
 73 ABBIENDI 2003R search for scalar/vector leptoquarks in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions at $\sqrt {s }$ = $189 - 209$ GeV. The quoted limits are for charge $−$4/3 isospin 0 scalar-leptoquark with B( ${{\mathit \ell}}{{\mathit q}}$ ) = 1. See their table 12 for other cases.
 74 ABAZOV 2002 search for scalar leptoquarks using ${{\mathit \nu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\overline{\mathit p}}}{{\mathit p}}$ collisions at $\mathit E_{{\mathrm {cm}}}$=1.8 TeV. The bound holds for all leptoquark generations. Vector leptoquarks are likewise constrained to lie above 200 GeV.
 75 ABAZOV 2001D search for scalar leptoquarks using ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ , ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ , and ${{\mathit \nu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$=1.8 TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ )=1. For B( ${{\mathit e}}{{\mathit q}}$ )=$0.5$ and 0, the bound becomes 204 and 79$~$GeV, respectively. Bounds for vector leptoquarks are also given. Supersedes ABBOTT 1998E.
 76 ABBIENDI 2000M search for scalar/vector leptoquarks in ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions at $\sqrt {\mathit s }$=183 GeV. The quoted limits are for charge $-4$/3 isospin$~$0 scalar-leptoquarks with B( ${{\mathit \ell}}{{\mathit q}}$ )=1. See their Table$~$8 and Figs.$~6 - 9$ for other cases.
 77 ABBOTT 2000C search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ , ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ , and ${{\mathit \nu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$=1.8 TeV. The limit above assumes B( ${{\mathit \mu}}{{\mathit q}}$ )=1. For B( ${{\mathit \mu}}{{\mathit q}}$ )=0.5 and 0, the bound becomes 180 and 79 GeV respectively. Bounds for vector leptoquarks are also given.
 78 AFFOLDER 2000K search for scalar leptoquark using ${{\mathit \nu}}{{\mathit \nu}}{{\mathit c}}{{\mathit c}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}=1.8~$TeV. The quoted limit assumes B( ${{\mathit \nu}}{{\mathit c}}$ )=1. Bounds for vector leptoquarks are also given.
 79 AFFOLDER 2000K search for scalar leptoquark using ${{\mathit \nu}}{{\mathit \nu}}{{\mathit b}}{{\mathit b}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}=1.8~$TeV. The quoted limit assumes B( ${{\mathit \nu}}{{\mathit b}}$ )=1. Bounds for vector leptoquarks are also given.
 80 ABBOTT 1999J search for leptoquarks using ${{\mathit \mu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$= $1.8$TeV. The quoted limit is for a scalar leptoquark with B( ${{\mathit \mu}}{{\mathit q}}$ ) = B( ${{\mathit \nu}}{{\mathit q}}$ ) = $0.5$. Limits on vector leptoquarks range from 240 to 290 GeV.
 81 ABBOTT 1998E search for scalar leptoquarks using ${{\mathit e}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ , ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ , and ${{\mathit \nu}}{{\mathit \nu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}=1.8$ TeV. The limit above assumes B( ${{\mathit e}}{{\mathit q}}$ )=1. For B( ${{\mathit e}}{{\mathit q}}$ )=$0.5$ and 0, the bound becomes 204 and 79 GeV, respectively.
 82 ABBOTT 1998J search for charge $−$1/3 third generation scalar and vector leptoquarks in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$= $1.8$ TeV. The quoted limit is for scalar leptoquark with B( ${{\mathit \nu}}{{\mathit b}}$ )=1.
 83 ABE 1998S search for scalar leptoquarks using ${{\mathit \mu}}{{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$= $1.8~$TeV. The limit is for B( ${{\mathit \mu}}{{\mathit q}}$ )= 1. For B( ${{\mathit \mu}}{{\mathit q}}$ )=B( ${{\mathit \nu}}{{\mathit q}}$ )=$0.5$, the limit is $>160$ GeV.
 84 GROSS-PILCHER 1998 is the combined limit of the CDF and ${D0}$ Collaborations as determined by a joint CDF/${D0}$ working group and reported in this FNAL Technical Memo. Original data published in ABE 1997X and ABBOTT 1998E.
 85 ABE 1997F search for third generation scalar and vector leptoquarks in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}$ = $1.8$ TeV. The quoted limit is for scalar leptoquark with B( ${{\mathit \tau}}{{\mathit b}}$ ) = 1.
 86 ABE 1997X search for scalar leptoquarks using ${{\mathit e}}{{\mathit e}}{{\mathit j}}{{\mathit j}}$ events in ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\mathit E_{{\mathrm {cm}}}=1.8$ TeV. The limit is for B( ${{\mathit e}}{{\mathit q}}$ )=1.
 87 Limit is for charge $−$1/3 isospin-0 leptoquark with B( ${{\mathit \ell}}{{\mathit q}}$ ) = 2/3.
 88 First and second generation leptoquarks are assumed to be degenerate. The limit is slightly lower for each generation.
 89 Limits are for charge $−$1/3, isospin-0 scalar leptoquarks decaying to ${{\mathit \ell}^{-}}{{\mathit q}}$ or ${{\mathit \nu}}{{\mathit q}}$ with any branching ratio. See paper for limits for other charge-isospin assignments of leptoquarks.
 90 KIM 1990 assume pair production of charge 2/3 scalar-leptoquark via photon exchange. The decay of the first (second) generation leptoquark is assumed to be any mixture of ${{\mathit d}}{{\mathit e}^{+}}$ and ${{\mathit u}}{{\overline{\mathit \nu}}}$ ( ${{\mathit s}}{{\mathit \mu}^{+}}$ and ${{\mathit c}}{{\overline{\mathit \nu}}}$ ). See paper for limits for specific branching ratios.
 91 BARTEL 1987B limit is valid when a pair of charge 2/3 spinless leptoquarks X is produced with point coupling, and when they decay under the constraint B( X $\rightarrow$ ${{\mathit c}}{{\overline{\mathit \nu}}_{{\mu}}}$ ) $+$ B( X $\rightarrow$ ${{\mathit s}}{{\mathit \mu}^{+}}$ ) = 1.
 92 BEHREND 1986B assumed that a charge 2/3 spinless leptoquark, ${{\mathit \chi}}$ , decays either into ${\mathit {\mathit s}}$ ${{\mathit \mu}^{+}}$ or ${\mathit {\mathit c}}$ ${{\overline{\mathit \nu}}}$ : B( ${{\mathit \chi}}$ $\rightarrow$ ${\mathit {\mathit s}}$ ${{\mathit \mu}^{+}}$ ) $+$ B( ${{\mathit \chi}}$ $\rightarrow$ ${\mathit {\mathit c}}$ ${{\overline{\mathit \nu}}}$ ) = 1.
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 ABBOTT 2000C
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 GROSS-PILCHER 1998
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 ABE 1997X
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 ABE 1997F
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