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

Limits are for cross section times branching ratio.
VALUE (pb/nucleon) DOCUMENT ID TECN  COMMENT
• • • We do not use the following data for averages, fits, limits, etc. • • •
1
 2020 D
ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ LLPs at 13 TeV
2
 2019 AE
ATLS ${{\mathit p}}{{\mathit p}}$ at 13 TeV
3
 2019 AK
ATLS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Phi}}$ $\rightarrow$ ${{\mathit Z}}{{\mathit Z}_{{d}}}$
4
 2019 AM
ATLS DY multi-charged LLP production
5
 2019 AO
ATLS LLP via displaced jets
6
 2019 AT
ATLS heavy, charged long-lived particles
7
 2019 G
ATLS LLP decay to ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$
8
 2019 BH
CMS LLP via displaced jets
9
 2019 BT
CMS LLP via displaced jets+MET
10
 2019 CA
CMS LLP $\rightarrow$ ${{\mathit \gamma}}$ search
11
 2019 Q
CMS ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit j}}$ + displaced dark quark jet
12
 2018 AW
CMS Long-lived particle search
13
 2016 AR
LHCB ${{\mathit H}}$ $\rightarrow$ ${{\mathit X}}{{\mathit X}}$ long-lived particles
14
 2016 BW
CMS direct production: HSCPs
$< 2 at 90\%CL$ 15
 1986
BDMP $\tau$ = (0.05$-1.){\times }10^{-8}$s
1  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.
2  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.
3  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.
4  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.
5  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.
6  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.
7  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.
8  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.
9  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.
10  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 .
11  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.
12  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.
13  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.
14  KHACHATRYAN 2016BW search for heavy stable charged particles via ToF with 2.5 fb${}^{-1}$ at 13 TeV; require stable m(gluinoball) $>$ 1610 GeV.
15  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:
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
 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
 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 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 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 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 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
 SIRUNYAN 2019CA
PR D100 112003 Search for long-lived particles using delayed photons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
 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 2019Q
JHEP 1902 179 Search for new particles decaying to a jet and an emerging jet
 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
ZPHY C31 21 Mass and Lifetime Limits on New Longlived Particles in 300 ${\mathrm {GeV/}}\mathit c$ ${{\mathit \pi}^{-}}$ Interactions