pdgLive

${{\widetilde{\mathit t}}}$ (Stop) mass limit

Limits depend on the decay mode. In ${{\mathit e}^{+}}{{\mathit e}^{-}}$ collisions they also depend on the mixing angle of the mass eigenstate ${{\widetilde{\mathit t}}_{{1}}}$ = ${{\widetilde{\mathit t}}_{{L}}}$cos $\theta _{\mathit t}$ $+$ ${{\widetilde{\mathit t}}_{{R}}}$sin$\theta _{\mathit t}$. The coupling to the ${{\mathit Z}}$ vanishes when $\theta _{\mathit t}$ = $0.98$. In the Listings below, we use $\Delta \mathit m$ ${}\equiv$ ${\mathit m}_{{{\widetilde{\mathit t}}_{{1}}}}–{\mathit m}_{{{\widetilde{\mathit \chi}}_{{1}}^{0}}}$ or $\Delta \mathit m$ ${}\equiv$ ${\mathit m}_{{{\widetilde{\mathit t}}_{{1}}}}–{\mathit m}_{{{\widetilde{\mathit \nu}}}}$, depending on relevant decay mode. See also bounds in “${{\widetilde{\mathit q}}}~$(Squark) MASS LIMIT.''
Some earlier papers are now obsolete and have been omitted. They were last listed in our PDG 2014 edition: K. Olive, $\mathit et~al.$ (Particle Data Group), Chinese Physics C38 070001 (2014) (http://pdg.lbl.gov).

R-parity violating ${{\widetilde{\mathit t}}}$ (Stop) mass limit

VALUE (GeV)

CL%

DOCUMENT ID

TECN

COMMENT

$> 1500$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit \ell}}}$ , c${{\mathit \tau}}$ = 2 cm

$> 1500$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit d}}{{\overline{\mathit \ell}}}$ , c${{\mathit \tau}}$ = 2 cm

$> 460$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit \ell}}}$ , 0.01cm $<$ c${{\mathit \tau}}$ $<$ 1000 cm

$\bf{> 460}$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit d}}{{\overline{\mathit \ell}}}$ , 0.01cm $<$ c${{\mathit \tau}}$ $<$ 1000 cm

$> 1100$

95

ATLS

${{\mathit \ell}^{\pm}}$ + ${{\mathit b}}$-jets + many jets, Tstop14, $\lambda {}^{''}_{323}$ electroweakino decay, 500 GeV $<$ ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{1}}^{0}}}$ $<$ 800 GeV

$> 1150$

95

ATLS

${{\mathit \ell}^{\pm}}$ + ${{\mathit b}}$-jets + many jets, Tstop15, $\lambda {}^{''}_{323}$ electroweakino decay, 600 GeV $<$ ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{1}}^{0}}}$ $<$ 900 GeV

$>1300$

95

ATLS

${{\mathit \ell}^{\pm}}$ + ${{\mathit b}}$-jets + many jets, Tstop1, $\lambda {}^{''}_{323}$, electroweakino decay, 500 GeV $<$ ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{1}}^{0}}}$ $<$ 1000 GeV

$> 1600$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\overline{\mathit d}}}{{\overline{\mathit d}}}$ , ${{\mathit \lambda}_{{3i3}}^{''}}$ coupling, 0.4 mm $<$ c${{\mathit \tau}}$ $<$ 80 mm

$> 1600$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit \ell}}}$ , 5 $<$ c${{\mathit \tau}}$ $<$ 240 mm

$> 1600$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit d}}{{\overline{\mathit \ell}}}$ , ${{\mathit \lambda}_{{x31}}^{\,'}}$ coupling, 3 $<$ c${{\mathit \tau}}$ $<$ 360 mm

$> 1600$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\overline{\mathit d}}}{{\overline{\mathit d}}}$ , ${{\mathit \eta}_{{311}}^{''}}$ coupling, 2 $<$ c${{\mathit \tau}}$ $<$ 1320 mm

$> 670$

95

CMS

${{\mathit \ell}^{\pm}}$ + ${}\geq{}$7 jets, Tstop1 with ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ $\rightarrow$ ${{\mathit q}}{{\mathit q}}{{\mathit q}}$ , ${{\mathit \lambda}_{{abc}}^{''}}$ coupling, ${{\mathit a}},{{\mathit b}},{{\mathit c}}$ $\in$ {1,2}

$> 870$

95

CMS

${{\mathit \ell}^{\pm}}$ + ${}\geq{}$7 jets, stealth SYY model

$\bf{> 1700}$

95

ATLS

${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit q}}{{\mathit \mu}}$ , long-lived, Tstop3RPV, $\tau $ = 0.1 ns

$> 1150$

95

ATLS

${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\mathit \mu}}$ , long-lived, Tstop2RPV, c$\tau $ = 0.1 cm

$\bf{> 1100}$

95

CMS

${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\mathit e}}$ , Tstop2RPV, prompt

$\text{none 100 - 410}$

95

ATLS

4 jets, Tstop1RPV with ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit d}}{{\mathit s}}$ , ${{\mathit \lambda}_{{312}}^{''}}$ coupling

$\text{none 100 - 470, 480 - 610}$

95

ATLS

4 jets, Tstop1RPV, ${{\mathit \lambda}_{{323}}^{''}}$ coupling

${}\geq{}\text{ 600 - 1500}$

95

ATLS

2${{\mathit \ell}}$ + ${{\mathit b}}$-jets, Tstop2RPV, depending on ${{\mathit \lambda}_{{i33}}^{\,'}}$ coupling (${{\mathit i}}$ = 1, 2, 3)

$> 1130$

95

CMS

${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\mathit \ell}}$ , long-lived, c$\tau $ = $70 - 100$ mm

$> 550$

95

CMS

${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\mathit \ell}}$ , long-lived, c$\tau $ = $1 - 1000$ mm

$> 1400$

95

CMS

long-lived ${{\widetilde{\mathit t}}}$, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\overline{\mathit d}}}{{\overline{\mathit d}}}$ , 0.6 mm $<$ c${{\mathit \tau}}<$ 80 mm

$\text{none 80 - 520}$

95

CMS

2, 4 jets, Tstop3RPV, ${{\mathit \lambda}_{{312}}^{''}}$ coupling

$\text{none 80 - 270, 285 - 340, 400 - 525}$

95

CMS

2 , 4 jets, Tstop1RPV, ${{\mathit \lambda}_{{323}}^{''}}$ coupling

$>1200$

95

ATLS

${}\geq{}1{{\mathit \ell}}$+ ${}\geq{}$8 jets, Tstop1 with ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ $\rightarrow$ ${{\mathit t}}{{\mathit b}}{{\mathit s}}$ , ${{\mathit \lambda}_{{323}}^{''}}$ coupling, ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{1}}^{0}}}$=500 GeV

$\text{none, 100 - 315}$

95

ATLS

2 large-radius jets, Tstop1RPV

$\text{none, 200 - 350}$

95

CMS

${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit q}}{{\mathit q}}$ , $\lambda {}^{''}_{312}$ $\not=$ 0

$\text{none, 200 - 385}$

95

CMS

${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit q}}{{\mathit b}}$ , $\lambda {}^{''}_{323}$ $\not=$ 0

$> 740$

95

CMS

${{\mathit \tau}}$ + ${{\mathit b}}$-jets, $\mathit LQ\bar D$, ${{\mathit \lambda}_{{333}}^{\,'}}{}\not=$0, ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit \tau}}{{\mathit b}}$ simplified model

$> 580$

95

CMS

${{\mathit \tau}}$ + ${{\mathit b}}$-jets, $\mathit LQ\bar D$, ${{\mathit \lambda}_{{3jk}}^{\,'}}{}\not=$0 (${{\mathit j}}{}\not=$=3), ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\widetilde{\mathit \chi}}^{\pm}}{{\mathit b}}$ , ${{\widetilde{\mathit \chi}}^{\pm}}$ $\rightarrow$ ${{\mathit q}}{{\mathit q}}{{\mathit \tau}^{\pm}}$ simplified model

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

$> 770$

95

ATLS

${}\geq{}$8 jets,${}\geq{}$5 ${{\mathit b}}$-jets,Tstop4RPV

$>890$

95

CMS

${{\mathit e}^{+}}{{\mathit e}^{-}}$ + ${}\geq{}$5 jets; ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\widetilde{\mathit \chi}}_{{1}}^{\pm}}$ ; ${{\widetilde{\mathit \chi}}_{{1}}^{\pm}}$ $\rightarrow$ ${{\mathit \ell}^{\pm}}$ ${{\mathit j}}{{\mathit j}}$ , ${{\mathit \lambda}_{{ijk}}^{\,'}}$

$> 1000$

95

CMS

${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ + ${}\geq{}$5 jets; ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\widetilde{\mathit \chi}}_{{1}}^{\pm}}$ ; ${{\widetilde{\mathit \chi}}_{{1}}^{\pm}}$ $\rightarrow$ ${{\mathit \ell}^{\pm}}$ ${{\mathit j}}{{\mathit j}}$ , ${{\mathit \lambda}_{{ijk}}^{\,'}}$

$> 950$

95

CMS

${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit t}}{{\widetilde{\mathit \chi}}_{{1}}^{0}}$ , ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ $\rightarrow$ ${{\mathit \ell}}{{\mathit \ell}}{{\mathit \nu}}$ , ${{\mathit \lambda}_{{121}}}$ or ${{\mathit \lambda}_{{122}}}{}\not=$0

$>790$

95

CMS

${{\widetilde{\mathit t}}_{{1}}}$ $\rightarrow$ ${{\mathit b}}{{\mathit \ell}}$ , c$\tau $ = 2 cm

¹

TUMASYAN 2022AF searched for evidence of new long-lived particles decaying to leptons in ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV, corresponding to 118 (113) ${\mathrm {fb}}{}^{-1}$ in the ee channel (e ${{\mathit \mu}}$ and ${{\mathit \mu}}{{\mathit \mu}}$ ) channels. The leptons are required to have transverse impact parameter values between 0.01 and 10 cm and are not required to form a common vertex. No significant excess above the Standard Model expectations is observed. Limits are set on the mass of the top squark in RPV models with top squark pair production and ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit \ell}}}$ and ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit d}}{{\overline{\mathit \ell}}}$ , see their Figure 4, which contains a wider range of lifetime limits. Limits are also set on a gauge-mediated SUSY breaking model, where the next-to-lightest SUSY particle is a slepton and the lightest SUSY particle a gravitino ${{\widetilde{\mathit G}}}$, see their Figure 5, which also contains a wider range of lifetime limits. Limits are also set in a model that produces BSM Higgs bosons (H) with a mass of 125 GeV through gluongluon fusion, where the H decays to two long-lived scalars ${{\mathit S}}$, each of which decays to two oppositely charged and same-flavor leptons.

²

AAD 2021BF searched in 139 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for pair production of gluinos, stops, electroweakinos decaying RPV either directly or indirectly via the LSP. The final state in all cases is one or two leptons, many jets (up to fifteen) and ${{\mathit b}}$-jets. Different models with different branching fractions of the gluino or stop follow from the assumptions on the nature of the electroweakinos. No significant excess above the Standard Model predictions is observed. Limits are set on the , ${{\widetilde{\mathit t}}_{{1}}}$, electroweakino masses as a function of the ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ mass in several scenarios of gluino, stop and electroweakino pair production.

³

SIRUNYAN 2021AF searched in 140 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for supersymmetry in events with with two displaced vertices from long-lived particles decaying into multijet or dijet final states. No significant excess above the Standard Model expectations is observed. Limits are set on the gluino mass in the simplified model Tglu2RPV with ${{\mathit \lambda}_{{323}}^{''}}$ coupling, on the ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ mass in an RPV model with ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ pair production and the RPV decay ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ $\rightarrow$ with ${{\mathit \lambda}_{{323}}^{''}}$ coupling and on the ${{\widetilde{\mathit t}}}$ mass in an RPV model with top squark pair production and the RPV decay ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\overline{\mathit d}}_{{i}}}{{\overline{\mathit d}}_{{j}}}$ with ${{\mathit \lambda}_{{3ij}}^{''}}$ coupling, see their Figure 7.

⁴

SIRUNYAN 2021U searched in 132 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for supersymmetry in events with displaced tracks and displaced vertices associated with a dijet system. No significant excess above the Standard Model expectations is observed. Limits are set on long-lived gluinos in an RPC GMSB SUSY model of gluino pair production, with ${{\widetilde{\mathit g}}}$ $\rightarrow$ ${{\mathit g}}{{\widetilde{\mathit G}}}$ , see their Figure 9, in Tglu1A in a mini-split model, see their Figure 10, and in an RPV model of gluino pair production, with ${{\widetilde{\mathit g}}}$ $\rightarrow$ ${{\mathit t}}{{\mathit b}}{{\mathit s}}$ with coupling ${{\mathit \lambda}_{{323}}^{''}}$, see their Figure 11. Limits are also set on long-lived top squarks in Tstop2RPV, see their Figure 12, in an RPV model with ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit d}}{{\overline{\mathit \ell}}}$ and ${{\mathit \lambda}_{{x31}}^{\,'}}$ coupling, see their Figure 13, and in a dynamical RPV model with ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\overline{\mathit d}}}{{\overline{\mathit d}}}$ via a nonholomorphic RPV coupling ${{\mathit \eta}_{{311}}^{''}}$, see their Figure 14. The best mass limit is achieved in all cases at c${{\mathit \tau}}$ = 30 mm.

⁵

SIRUNYAN 2021V searched in 137 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for supersymmetry in events with one charged lepton (${{\mathit e}^{\pm}}$ or ${{\mathit \mu}^{\pm}}$) and ${}\geq{}$7 jets. No significant excess above the Standard Model expectations is observed. Limits are set on an RPV SUSY model like Tstop1 with the additional decay ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ $\rightarrow$ ${{\mathit q}}{{\mathit q}}{{\mathit q}}$ with coupling ${{\mathit \lambda}_{{abc}}^{''}}$, with ${{\mathit a}},{{\mathit b}},{{\mathit c}}$ $\in$ {1,2}, and on a stealth SUSY model called SYY, with one scalar particle ${{\mathit S}}$ with even R-parity and its superpartner ${{\widetilde{\mathit S}}}$, both singlets under all SM interactions, and with a portal mediated by loop interactions involving a new vectorlike messenger field (${{\mathit Y}}$), where pair produced top squarks decay as ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit t}}{{\mathit g}}{{\widetilde{\mathit S}}}$ , and ${{\widetilde{\mathit S}}}$ $\rightarrow$ ${{\widetilde{\mathit G}}}{{\mathit S}}$ , and ${{\mathit S}}$ $\rightarrow$ ${{\mathit g}}{{\mathit g}}$ , see their Figure 6 and 7.

⁶

AAD 2020M searched for long-lived particles decaying into hadrons and at least one muon in events containing a displaced muon track and a displaced vertex. The analysis uses a dataset of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV corresponding to an integrated luminosity of 136 ${\mathrm {fb}}{}^{-1}$. Using the Tstop3RPV simplified model, top squarks with masses up to 1.7 TeV are excluded for a lifetime of 0.1 ns, and masses below 1.3 TeV are excluded for lifetimes between 0.01 ns and 30 ns, see their Fig. 7. The dependence on the RPV coupling ${{\mathit \lambda}_{{23k}}}$ multiplied by cos${{\mathit \theta}_{{t}}}$, with ${{\mathit \theta}_{{t}}}$ the mixing angle between the left- and right-handed ${{\widetilde{\mathit t}}}$ squarks, is also shown, see their Fig. 7.

⁷

SIRUNYAN 2019BI searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV in final states with two muons and two jets, or with one muon, two jets, and missing transverse momentum. Limits are set in a model of pair-produced, prompt or long-lived top squarks with R-parity violating decays to a ${{\mathit b}}$-quark and a lepton (Tstop2RPV), branching fraction of ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\mathit \mu}}$ equal to 1/3 and c$\tau $ between 0.1 cm and 10 cm in the case of long-lived top squarks. See their Fig. 10.

⁸

SIRUNYAN 2019BJ searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV in final states with two electrons and two jets, or with one electron, two jets, and missing transverse momentum. Limits are set in a model of pair-produced, prompt top squarks with R-parity violating decays to a ${{\mathit b}}$-quark and a lepton (Tstop2RPV), assuming branching fraction of ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\mathit e}}$ equal to 1/3 and c$\tau $ = 0 cm. See their Fig.10.

⁹

AABOUD 2018BB searched in 36.7 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for massive colored resonances which are pair-produced and decay into two jets. No significant deviation from the background prediction is observed. Results are interpreted in a SUSY simplified model as Tstop1RPV with ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit d}}{{\mathit s}}$ . Top squarks with masses in the range $100 - 410$ GeV are excluded, see their Figure 9(a). The ${{\mathit \lambda}_{{312}}^{''}}$ coupling is assumed to be sufficiently large for the decays to be prompt, but small enough to neglect the single-top-squark resonant production through RPV couplings.

¹⁰

AABOUD 2018BB searched in 36.7 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for massive coloured resonances which are pair-produced and decay into two jets. No significant deviation from the background prediction is observed. Results are interpreted in Tstop1RPV. Top squarks with masses in the range $100 - 470$ GeV or $480 - 610$ GeV are excluded, see their Figure 9(b). The ${{\mathit \lambda}_{{323}}^{''}}$ coupling is assumed to be sufficiently large for the decays to be prompt, but small enough to neglect the single-top-squark resonant production through RPV couplings.

¹¹

AABOUD 2018P searched in 36.1 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for pair-produced top squarks that decay through RPV ${{\mathit \lambda}_{{i33}}^{\,'}}$ (${{\mathit i}}$ = 1, 2, 3) couplings to a final state with two leptons and two jets, at least one of which is identified as a ${{\mathit b}}$-jet. No significant excess is observed over the SM background. In the Tstop2RPV model, lower limits on the top squark masses between 600 and 1500 GeV are set depending on the branching fraction to ${{\mathit b}}{{\mathit e}}$ , ${{\mathit b}}{{\mathit \mu}}$ , and ${{\mathit b}}{{\mathit \tau}}$ final states. See their Figs 6 and 7.

¹²

SIRUNYAN 2018AD searched in 2.6 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for long-lived particles by exploiting the multiplicity of displaced jets to search for the presence of signal decays occurring at distances between 1 and 1000 mm. Limits are set in a model of pair-produced, long-lived top squarks with R-parity violating decays to a ${{\mathit b}}$-quark and a lepton, see their Figure 3.

¹³

SIRUNYAN 2018DV searched in 38.5 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for long-lived particles in events with multiple jets and two displaced vertices composed of many tracks. No events with two well-separated high-track-multiplicity vertices were observed. Limits are set on the stop and the gluino mass in RPV models of supersymmetry where the stop (gluino) is decaying solely into dijet (multijet) final states, see their Figures 6 and 7.

¹⁴

SIRUNYAN 2018DY searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for the pair production of resonances, each decaying to two quarks. The search is conducted separately in a boosted (two-jet) and resolved (four-jet) jet topology. The mass spectra are found to be consistent with the Standard Model expectations. Limits are set on the stop mass in the Tstop3RPV and Tstop1RPV simplified models, see their Figure 11.

¹⁵

AABOUD 2017AI searched in 36.1 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events with one or more isolated lepton, at least eight jets, either zero or many ${{\mathit b}}$-jets, for evidence of R-parity violating decays of the top squark. No significant excess above the Standard Model expectations is observed. Limits up to 1.25 (1.10) TeV are set on the top squark mass in R-parity-violating supersymmetry models where ${{\widetilde{\mathit t}}_{{1}}}$ decays for a bino LSP as: ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit t}}{{\widetilde{\mathit \chi}}_{{1}}^{0}}$ and for a higgsino LSP as ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit t}}{{\widetilde{\mathit \chi}}_{{1,2}}^{0}}$ / ${{\mathit b}}{{\widetilde{\mathit \chi}}_{{1}}^{+}}$ . These is followed by the decays through the non-zero ${{\mathit \lambda}_{{323}}^{''}}$ coupling ${{\widetilde{\mathit \chi}}_{{1,2}}^{0}}$ $\rightarrow$ ${{\mathit t}}{{\mathit b}}{{\mathit s}}$ , ${{\widetilde{\mathit \chi}}_{{1}}^{\pm}}$ $\rightarrow$ ${{\mathit b}}{{\mathit b}}{{\mathit s}}$ . See their Figure 10 and text for details on model assumptions.

¹⁶

AAD 2016AM searched in 17.4 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for events containing two large-radius hadronic jets. No deviation from the background prediction is observed. Top squarks with masses between 100 and 315 GeV are excluded at 95$\%$ C.L. in the hypothesis that they both decay via ${{\mathit R}}$ -parity violating coupling ${{\mathit \lambda}_{{323}}^{"}}$ to ${{\mathit b}}$- and ${{\mathit s}}$-quarks. See their Fig. 10.

¹⁷

KHACHATRYAN 2015L searched in 19.4 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for pair production of heavy resonances decaying to pairs of jets in four jet events. No significant excess above the Standard Model expectations is observed. Limits are set on the stop mass in $\mathit R$-parity-violating supersymmetry models where ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit q}}{{\mathit q}}$ ($\lambda {}^{''}_{312}$ $\not=$ 0), see Fig. 6 (top) and ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit q}}{{\mathit b}}$ ($\lambda {}^{''}_{323}$ $\not=$ 0), see Fig. 6 (bottom).

¹⁸

KHACHATRYAN 2014T searched in 19.7 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for events with ${{\mathit \tau}}$-leptons and ${{\mathit b}}$-quark jets, possibly with extra light-flavour jets. No excess above the Standard Model expectations is observed. Limits are set on stop masses in RPV SUSY models with $\mathit LQ\bar D$ couplings, in two simplified models. In the first model, the decay ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit \tau}}{{\mathit b}}$ is considered, with ${{\mathit \lambda}_{{333}}^{\,'}}{}\not=$0, see Fig. 3. In the second model, the decay ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\widetilde{\mathit \chi}}^{\pm}}{{\mathit b}}$ , with the subsequent decay ${{\widetilde{\mathit \chi}}^{\pm}}$ $\rightarrow$ ${{\mathit q}}{{\mathit q}}{{\mathit \tau}^{\pm}}$ is considered, with ${{\mathit \lambda}_{{3jk}}^{\,'}}{}\not=$0 and the mass splitting between the top squark and the charging chosen to be 100 GeV, see Fig. 4.

¹⁹

AAD 2021B searched in 139 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events with at least eight jets and at least 5 ${{\mathit b}}$-jets, for evidence of R-parity violating decays of the top squark. No significant excess above the Standard Model expectations is observed. Limits up to 950 GeV are set on the top squark mass in Tstop4RPV simplified model. See their Figure 7 for more detailed mass bounds.

²⁰

KHACHATRYAN 2016AC searched in 19.7 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for events with low missing transverse momentum, two oppositely charged electrons or muons, and at least five jets, at least one of which is a ${{\mathit b}}$-jet, for evidence of R-parity violating, charging-mediated decays of the top squark. No significant excess above the Standard Model expectations is observed. Limits are set on the stop mass in R-parity-violating supersymmetry models where ${{\widetilde{\mathit t}}}$ $\rightarrow$ ${{\mathit b}}{{\widetilde{\mathit \chi}}_{{1}}^{\pm}}$ with ${{\widetilde{\mathit \chi}}_{{1}}^{\pm}}$ $\rightarrow$ ${{\mathit \ell}^{\pm}}{{\mathit j}}{{\mathit j}}$ , ${{\mathit \lambda}_{{ijk}}^{\,'}}$ ${}\not=$ 0 (${{\mathit i}},{{\mathit j}}$, ${{\mathit k}}{}\leq{}$ 2), and with ${\mathit m}_{{{\widetilde{\mathit t}}}}$ $−$ ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{1}}^{\pm}}}$ = 100 GeV, see Fig. 3.

²¹

KHACHATRYAN 2016BX searched in 19.5 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for events containing 4 leptons coming from R-parity-violating decays of ${{\widetilde{\mathit \chi}}_{{1}}^{0}}$ $\rightarrow$ ${{\mathit \ell}}{{\mathit \ell}}{{\mathit \nu}}$ with ${{\mathit \lambda}_{{121}}}{}\not=$ 0 or ${{\mathit \lambda}_{{122}}}{}\not=$ 0. No excess over the expected background is observed. Limits are derived on the gluino, squark and stop masses, see Fig. 23.

²²

KHACHATRYAN 2015E searched for long-lived particles decaying to leptons in 19.7 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV. Events were selected with an electron and muon with opposite charges and each with transverse impact parameter values between 0.02 and 2 cm. Limits are set on SUSY benchmark models with pair production of top squarks decaying into an ${{\mathit e}}{{\mathit \mu}}$ final state via RPV interactions. See their Fig. 2

References:

EPJ C82 153

Search for long-lived particles decaying to leptons with large impact parameter in proton?proton collisions at $\sqrt{s} = 13\,\text {Te}\text {V} $

EPJ C81 1023

Search for R-parity-violating supersymmetry in a final state containing leptons and many jets with the ATLAS experiment using $\sqrt{s} = 13 { TeV}$ proton?proton collision data

EPJ C81 11

Search for phenomena beyond the Standard Model in events with large $b$-jet multiplicity using the ATLAS detector at the LHC

EPJ C81 249 (errat.)

Search for phenomena beyond the Standard Model in events with large $b$-jet multiplicity using the ATLAS detector at the LHC

PR D104 012015

Search for long-lived particles using displaced jets in proton-proton collisions at $\sqrt{s} = $ 13 TeV

PR D104 032006

Search for top squarks in final states with two top quarks and several light-flavor jets in proton-proton collisions at $\sqrt {s}$ = 13??TeV

PR D104 052011

Search for long-lived particles decaying to jets with displaced vertices in proton-proton collisions at $\sqrt{s}=$ 13 TeV

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

PR D99 052002

Search for pair production of first-generation scalar leptoquarks at $\sqrt{s} =$ 13 TeV

PR D99 032014

Search for pair production of second-generation leptoquarks at $\sqrt{s}=$ 13 TeV

EPJ C78 250

A search for pair-produced resonances in four-jet final states at $\sqrt{s} =$ 13 TeV with the ATLAS detector

PR D97 032003

Search for B-L R -parity-violating top squarks in $\sqrt s$ =13??TeV pp collisions with the ATLAS experiment

PR D98 092011

Search for long-lived particles with displaced vertices in multijet events in proton-proton collisions at $\sqrt{s}= $13 TeV

PR D98 112014

Search for pair-produced resonances decaying to quark pairs in proton-proton collisions at $\sqrt{s}=$ 13 TeV

PL B780 432

Search for new long-lived particles at $\sqrt{s} =$ 13 TeV

JHEP 1709 088

Search for New Phenomena in a Lepton Plus High Jet Multiplicity Final State with the ATLAS Experiment using $\sqrt {s }$ = 13 TeV Proton-Proton Collision Data

JHEP 1606 067

A Search for Top squarks with R-parity-violating Decays to All-hadronic Final States with the ATLAS Detector in $\sqrt {s }$ = 8 TeV Proton-Proton Collisions

PL B760 178

Search for ${{\mathit R}}$ -Parity Violating Decays of a top squark in Proton-Proton Collisions at $\sqrt {s }$ = 8 TeV

PR D94 112009

Searches for $\mathit R$-Parity-Violating Supersymmetry in ${{\mathit p}}{{\mathit p}}$ Collisions at $\sqrt {s }$ = 8 TeV in Final States with $0 - 4$ Leptons

PRL 114 061801

Search for Displaced Supersymmetry in Events with an Electron and a Muon with Large Impact Parameters

PL B747 98

Search for Pair-Produced Resonances Decaying to Jet Pairs in Proton-Proton Collisions at $\sqrt {s }$ = 8 TeV

PL B739 229

Search for Pair Production of Third-Generation Scalar Leptoquarks and Top squarks in Proton-Proton Collisions at $\sqrt {s }$ = 8 TeV

Except where otherwise noted, content of the 2023 Review of Particle Physics is licensed under a Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy), JPS and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2023. See LBNL disclaimers.