#### Long-Lived Particle (LLP) Search at Hadron Collisions

Limits are for cross section times branching ratio.
VALUE (fb) CL% DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
1
 2021 AL
ATLS charged LLPs search
2
 2021 BA
ATLS LLP from higgs decay search
3
 2021 V
LHCB LLP $\rightarrow$ ${{\mathit e}}{{\mathit \mu}}{{\mathit \nu}}$ search
4
 2021 AF
CMS LLP search via displaced jets
$<0.07$ 95 5
 2021 U
CMS LLP search via displaced jets
6
 2021
CMS LLP endcap muon detector searches
7
 2020 D
ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ LLPs at 13 TeV
8
 2020 J
ATLS scalar boson decay to LLPs
9
 2020 M
ATLS LLP top squark decay to ${{\mathit \mu}}$
10
 2020 P
ATLS LLP dark photon search
11
 2020 AL
LHCB ${{\mathit p}}{{\mathit p}}$ dimuon resonance
12
 2020
LLP milli-charged particles at LHC
13
 2019 AE
ATLS ${{\mathit p}}{{\mathit p}}$ at 13 TeV
14
 2019 AK
ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Phi}}$ $\rightarrow$ ${{\mathit Z}}{{\mathit Z}_{{d}}}$
15
 2019 AM
ATLS DY multi-charged LLP production
16
 2019 AO
ATLS LLP via displaced jets
17
 2019 AT
ATLS heavy, charged LLPs
18
 2019 G
ATLS LLP decay to ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$
19
 2019 BH
CMS LLP via displaced jets
20
 2019 BT
CMS LLP via displaced jets+MET
21
 2019 CA
CMS LLP $\rightarrow$ ${{\mathit \gamma}}$ search
22
 2019 Q
CMS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit j}}$ + displaced dark quark jet
23
 2018 AW
CMS Long-lived particle search
24
 2016 AR
LHCB ${{\mathit H}}$ $\rightarrow$ ${{\mathit X}}{{\mathit X}}$ LLPs
25
 2016 BW
CMS direct production: HSCPs
$<2000$ 90 26
 1986
BDMP $\tau$ = (0.05$-1.){\times }10^{-8}$s
 1 AAD 2021AL reports on ATLAS search for long-lived charged particles with 139 fb${}^{-1}$ at 13 TeV. No signal observed. Limits placed in lifetime vs. mass plane: e.g. for ${{\mathit \tau}}$ (LLP) $\sim{}$ 0.1 ns, m(selectron) $>$ 720 GeV.
 2 AAD 2021BA search for long-lived particles from ${{\mathit Z}}{{\mathit H}}$ production ( ${{\mathit H}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ ) with 2 displaced vertices in 139 fb${}^{-1}$ of data at 13 TeV. No signal detected. Limits placed in branching fraction vs. lifetime plane.
 3 AAIJ 2021V search for ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ LLP + LLP with LLP $\rightarrow$ ${{\mathit e}}{{\mathit \mu}}{{\mathit \nu}}$ in the lifetime range between 2 and 50 ps at LHCb with 5.4 fb${}^{-1}$ at 13 TeV. No signal observed. Limits placed in LLP cross section vs. mass or lifetime plane for m(LLP) $\sim{}$ 7 to 50 GeV.
 4 SIRUNYAN 2021AF search for LLPs at CMS via jets with 2 displaced vertices in 140 fb${}^{-1}$ of data at 13 TeV. No signal observed. Limits placed for RPV SUSY models in which a long-lived neutralino or gluino decays into a multijet final state with top, bottom, and strange quarks.
 5 SIRUNYAN 2021U search for long-lived particles (LLPs) via displaced jets at CMS with LHC13 and 132 fb${}^{-1}$. No signal detected. Limits placed on simplified model production of LLP ${{\mathit X}}$ $\rightarrow$ ${{\mathit q}}{{\overline{\mathit q}}}$ with ${{\mathit \sigma}}$ $<$ 0.07 fb for m(X) $>$ 500 GeV and c${{\mathit \tau}}$ $\sim{}$ 2 to 250 mm.
 6 TUMASYAN 2021 search for long-lived particles in CMS muon endcap detector in 137 fb${}^{-1}$ of data at 13 TeV. No signal detected. Limits are placed depending on the branching fraction of Higgs boson to LLP decaying to ${{\mathit d}}{{\mathit d}}$ , ${{\mathit b}}{{\mathit b}}$ , and ${{\mathit \tau}^{+}}{{\mathit \tau}^{-}}$ , depending on proper decay length, and LLP masses.
 7 AAD 2020D search for opposite-sign dileptons originating from long-lived particles in ${{\mathit p}}{{\mathit p}}$ collisions at 13 Tev with 32.8 fb${}^{-1}$; limits placed in squark cross section vs. c${{\mathit \tau}}$ plane for RPV SUSY.
 8 AAD 2020J search for scalar boson decay to two long-lived particles; no signal; limits placed in BF vs c${{\mathit \tau}}$ plane for various mass hypotheses. This search is also combined with other ATLAS displaced-jet searches.
 9 AAD 2020M search for long-lived top-squarks decay to ${{\mathit \mu}}$ and hadrons; no signal; limits placed in cross section vs. mass and mass vs. lifetime planes .
 10 AAD 2020P search for long-lived dark photons produced from the decay of a scalar boson, with each dark photon decaying into displaced collimated leptons or light hadrons at 13 TeV with 36 fb${}^{-1}$; no signal; limits placed in ${{\mathit \sigma}}$ $\cdot{}$BF vs. c${{\mathit \tau}}$ and other planes.
 11 AAIJ 2020AL search for long-lived ${{\mathit X}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ decays in 5.1 fb${}^{-1}$ of LHCb data at 13 TeV; no signal; limits placed on m(${{\mathit X}}$ ) up to 3 GeV depending on kinetic mixing.
 12 BALL 2020 search for long-lived milli-charged particles produced at LHC; limits placed in charge vs. mass plane (Fig. 8).
 13 AABOUD 2019AE search for long-lived particles via displaced jets using 10.8 fb${}^{-1}$ or 33.0 fb${}^{-1}$ data (depending on a trigger) at 13 TeV; no signal found and limits set in branching ratio vs. decay length plane.
 14 AABOUD 2019AK searches for long-lived particle ${{\mathit Z}_{{d}}}$ via ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Phi}}$ $\rightarrow$ ${{\mathit Z}}{{\mathit Z}_{{d}}}$ at 13 TeV with 36.1 fb${}^{-1}$; no signal found and limits set in ${{\mathit \sigma}}{\times }$BR vs. lifetime plane for simplified model.
 15 AABOUD 2019AM search for Drell-Yan (DY) production of long-lived multi-charge particles at 13 TeV with 36.1 fb${}^{-1}$ of data; no signal found and exclude 50 GeV $<$ m(LLMCP) $<$ $980 - 1220$ GeV for electric charge $\vert$q$\vert$ = ($2 - 7$)e.
 16 AABOUD 2019AO search for neutral long-lived particles producing displaced jets at 13 TeV with 36.1 fb${}^{-1}$ of data; no signal found and exclude regions of ${{\mathit \sigma}}$ $\cdot{}$BR vs. lifetime plane for various models.
 17 AABOUD 2019AT search for heavy, charged long-lived particles at 13 TeV with 36.1 fb${}^{-1}$; no signal found and upper limits set on masses of various hypothetical particles.
 18 AABOUD 2019G search for long-lived particle with decay to ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ at 13 TeV with 32.9 fb${}^{-1}$; no signal found and limits set in combinations of lifetime, mass and coupling planes for various simplified models.
 19 SIRUNYAN 2019BH search for long-lived SUSY particles via displaced jets at 13 TeV with 35.9 fb${}^{-1}$; no signal found and limits placed in mass vs lifetime plane for various hypothetical models.
 20 SIRUNYAN 2019BT search for displaced jet(s)+$\not E_T$ at 13 TeV with 137 fb${}^{-1}$; no signal found and limits placed in mass vs lifetime plane for gauge mediated SUSY breaking models.
 21 SIRUNYAN 2019CA search for gluino/squark decay to long-lived neutralino, decay to ${{\mathit \gamma}}$ in GMSB; no signal, limits placed in m(${{\mathit \chi}}$ ) vs. lifetime plane for SPS8 GMSB benchmark point .
 22 SIRUNYAN 2019Q search for ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit j}}$ + displaced jet via dark quark with 13 TeV at 16.1 fb${}^{-1}$; no signal found and limits set in mass vs lifetime plane for dark quark/dark pion model.
 23 SIRUNYAN 2018AW search for very long lived particles (LLPs) decaying hadronically or to ${{\mathit \mu}}{{\overline{\mathit \mu}}}$ in CMS detector; none seen/limits set on lifetime vs. cross section.
 24 AAIJ 2016AR search for long lived particles from ${{\mathit H}}$ $\rightarrow$ ${{\mathit X}}{{\mathit X}}$ with displaced ${{\mathit X}}$ decay vertex using 0.62 fb${}^{-1}$ at 7 TeV; limits set in Fig. 7.
 25 KHACHATRYAN 2016BW search for heavy stable charged particles via ToF with 2.5 fb${}^{-1}$ at 13 TeV; require stable m(gluinoball) $>$ 1610 GeV.
 26 BADIER 1986 looked for long-lived particles at 300 GeV ${{\mathit \pi}^{-}}$ beam dump. The limit applies for nonstrongly interacting neutral or charged particles with mass $>$2 GeV. The limit applies for particle modes, ${{\mathit \mu}^{+}}{{\mathit \pi}^{-}}$ , ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ , ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ X, ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{\pm}}$ etc. See their figure 5 for the contours of limits in the mass-$\tau$ plane for each mode.
References:
 AAD 2021BA
JHEP 2111 229
 AAD 2021AL
PRL 127 051802 Search for Displaced Leptons in $\sqrt{s} = 13$ TeV $pp$ Collisions with the ATLAS Detector
 AAIJ 2021V
EPJ C81 261 Search for long-lived particles decaying to $e^\pm \mu^\mp \nu$
 SIRUNYAN 2021AF
PR D104 052011
 SIRUNYAN 2021U
PR D104 012015 Search for long-lived particles using displaced jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV
 TUMASYAN 2021
PRL 127 261804
 AAD 2020M
PR D102 032006 Search for long-lived, massive particles in events with a displaced vertex and a muon with large impact parameter in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
 AAD 2020D
PL B801 135114 Search for displaced vertices of oppositely charged leptons from decays of long-lived particles in $pp$ collisions at $\sqrt {s}$ =13 TeV with the ATLAS detector
 AAD 2020J
PR D101 052013 Search for long-lived neutral particles produced in $pp$ collisions at $\sqrt{s} = 13$ TeV decaying into displaced hadronic jets in the ATLAS inner detector and muon spectrometer
 AAD 2020P
EPJ C80 450 Search for light long-lived neutral particles produced in $pp$ collisions at $\sqrt{s} =$ 13 TeV and decaying into collimated leptons or light hadrons with the ATLAS detector
 AAIJ 2020AL
JHEP 2010 156 Searches for low-mass dimuon resonances
 BALL 2020
PR D102 032002 Search for millicharged particles in proton-proton collisions at $\sqrt{s} = 13$ TeV
 AABOUD 2019AO
PR D99 052005 Search for long-lived particles produced in $pp$ collisions at $\sqrt{s}=13$ TeV that decay into displaced hadronic jets in the ATLAS muon spectrometer
 AABOUD 2019AE
EPJ C79 481 Search for long-lived neutral particles in $pp$ collisions at $\sqrt{s}$ = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter
 AABOUD 2019AT
PR D99 092007 Search for heavy charged long-lived particles in the ATLAS detector in 36.1 fb$^{-1}$ of proton-proton collision data at $\sqrt{s} = 13$ TeV
 AABOUD 2019AM
PR D99 052003 Search for heavy long-lived multicharged particles in proton-proton collisions at $\sqrt{s}$ = 13 TeV using the ATLAS detector
 AABOUD 2019AK
PRL 122 151801 Search for the Production of a Long-Lived Neutral Particle Decaying within the ATLAS Hadronic Calorimeter in Association with a $Z$ Boson from $pp$ Collisions at $\sqrt{s} =$ 13 TeV
 AABOUD 2019G
PR D99 012001 Search for long-lived particles in final states with displaced dimuon vertices in $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector
 SIRUNYAN 2019CA
PR D100 112003 Search for long-lived particles using delayed photons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
 SIRUNYAN 2019Q
JHEP 1902 179 Search for new particles decaying to a jet and an emerging jet
 SIRUNYAN 2019BH
PR D99 032011 Search for long-lived particles decaying into displaced jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
 SIRUNYAN 2019BT
PL B797 134876 Search for long-lived particles using nonprompt jets and missing transverse momentum with proton-proton collisions at $\sqrt{s} =$ 13 TeV
 SIRUNYAN 2018AW
JHEP 1805 127 Search for decays of stopped exotic long-lived particles produced in proton-proton collisions at $\sqrt{s}=$ 13 TeV
 AAIJ 2016AR
EPJ C76 664 Search for Higgs-Like Bosons Decaying into Long-Lived Exotic Particles
 KHACHATRYAN 2016BW
PR D94 112004 Search for Long-Lived Charged Particles in Proton-Proton Collisions at $\sqrt {s }$ = 13 TeV
 BADIER 1986
ZPHY C31 21 Mass and Lifetime Limits on New Longlived Particles in 300 ${\mathrm {GeV/}}\mathit c$ ${{\mathit \pi}^{-}}$ Interactions