Unless otherwise stated, results in this section assume spectra and production rates as evaluated in the MSSM. Unless otherwise stated, the goldstino or gravitino mass ${\mathit m}_{{{\widetilde{\mathit G}}}}$ is assumed to be negligible relative to all other masses. In the following, ${{\widetilde{\mathit G}}}$ is assumed to be undetected and to give rise to a missing energy ($\not E$) signature.

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).

VALUE (GeV) CL% DOCUMENT ID TECN  COMMENT $> 540$ 95 1 AAD 2021 Y ATLS ${}\geq{}4{{\mathit \ell}}$, Tchi1n12-GGM, ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit Z}}{{\widetilde{\mathit G}}}$ $\text{none 7 - 50}$ 95 2 AAIJ 2021 V LHCB ${{\mathit e}^{\pm}}{{\mathit \mu}^{\mp}}$ , RPV ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit e}^{\pm}}{{\mathit \mu}^{\mp}}{{\mathit \nu}}$ , 2 ps $<$ ${{\mathit \tau}}$ $<$ 50 ps $> 1100$ 95 3 SIRUNYAN 2021 AF CMS long-lived ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$, RPV ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ , ${{\mathit \lambda}_{{{323}}}^{''}}$ coupling, 0.6 mm $<$ c${{\mathit \tau}}$ $<$ 70 mm $> 800$ 95 4 SIRUNYAN 2021 M CMS ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\mp}}$ + $\not E_T$, Tn1n1C $> 650$ 95 4 SIRUNYAN 2021 M CMS ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\mp}}$ + $\not E_T$, Tn1n1B $> 380$ 95 5 AAD 2020 AN ATLS 2${{\mathit \gamma}}$ + $\not E_T$,Tn1n1A, GMSB $> 525$ 95 6 SIRUNYAN 2019 CA CMS ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ , GMSB, SPS8, $\mathit c{{\mathit \tau}}$=1 m $> 290$ 95 7 SIRUNYAN 2019 CI CMS ${}\geq{}$1 ${{\mathit H}}$ ( $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ ) + jets + $\not E_T$, Tn1n1A, GMSB $> 230$ 95 7 SIRUNYAN 2019 CI CMS ${}\geq{}$1 ${{\mathit H}}$ ( $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ ) + jets + $\not E_T$, Tn1n1B , GMSB $>930$ 95 8 SIRUNYAN 2019 K CMS ${{\mathit \gamma}}$ + lepton + $\not E_T$, Tchi1n1A $\text{none 130 - 230, 290 - 880}$ 95 9 AABOUD 2018 CK ATLS 2${{\mathit H}}$ ( $\rightarrow$ ${{\mathit b}}{{\mathit b}}$ )+$\not E_T$,Tn1n1A, GMSB $> 295$ 95 10 AABOUD 2018 Z ATLS ${}\geq{}4{{\mathit \ell}}$, GMSB, Tn1n1C $> 180$ 95 11 SIRUNYAN 2018 AO CMS ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\pm}}$ or ${}\geq{}3{{\mathit \ell}}$ , Tn1n1A $> 260$ 95 11 SIRUNYAN 2018 AO CMS ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\pm}}$ or ${}\geq{}3{{\mathit \ell}}$ , Tn1n1B $> 450$ 95 11 SIRUNYAN 2018 AO CMS ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\pm}}$ or ${}\geq{}3{{\mathit \ell}}$ , Tn1n1C $> 750$ 95 12 SIRUNYAN 2018 AP CMS Combination of searches, GMSB, Tn1n1A $> 650$ 95 12 SIRUNYAN 2018 AP CMS Combination of searches, GMSB, Tn1n1B $> 690$ 95 12 SIRUNYAN 2018 AP CMS Combination of searches, GMSB, Tn1n1C $> 500$ 95 13 SIRUNYAN 2018 AR CMS ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\mp}}$ + jets +$\not E_T$, GMSB, Tn1n1B $> 650$ 95 13 SIRUNYAN 2018 AR CMS ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\mp}}$ + jets +$\not E_T$, GMSB, Tn1n1C $\text{none 230 - 770}$ 95 14 SIRUNYAN 2018 O CMS 2 ${{\mathit H}}$ ( $\rightarrow$ ${{\mathit b}}{{\mathit b}}$ ) + $\not E_T$, Tn1n1A, GMSB $> 205$ 95 15 SIRUNYAN 2018 X CMS ${}\geq{}$1 ${{\mathit H}}$ ( $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ ) + jets + $\not E_T$, Tn1n1A, GMSB $> 130$ 95 15 SIRUNYAN 2018 X CMS ${}\geq{}$1 ${{\mathit H}}$ ( $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}$ ) + jets + $\not E_T$, Tn1n1B , GMSB $\bf{> 380}$ 95 16 KHACHATRYA.. 2014 L CMS ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit Z}}{{\widetilde{\mathit G}}}$ simplified models, GMSB, RPV • • We do not use the following data for averages, fits, limits, etc. • • 17 AAD 2020 D ${{\widetilde{\mathit q}}}$ $\rightarrow$ ${{\mathit q}}{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ , ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \ell}}{{\mathit \ell}}{{\mathit \nu}}$ , RPV, ${{\mathit \lambda}_{{{121}}}}$ or ${{\mathit \lambda}_{{{122}}}}{}\not=$0 $\text{none 300 - 1000}$ 95 18 AABOUD 2019 G ATLS ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit Z}}{{\widetilde{\mathit G}}}$ from gluinos as in Tglu1A, GMSB, depending on c${{\mathit \tau}}$ 19 AAIJ 2017 Z displaced vertex with associated ${{\mathit \mu}}$ 20 KHACHATRYA.. 2016 BX CMS ${}\geq{}3{{\mathit \ell}^{\pm}}$, RPV, ${{\mathit \lambda}}$ or ${{\mathit \lambda}^{\,'}}$ couplings, wino- or higgsino-like neutralinos 21 AAD 2014 BH ATLS 2${{\mathit \gamma}}$ + $\not E_T$, GMSB, SPS8 22 AAD 2013 AP ATLS 2${{\mathit \gamma}}$ + $\not E_T$, GMSB, SPS8 $\text{none 220 - 380}$ 95 23 AAD 2013 Q ATLS ${{\mathit \gamma}}$ + ${{\mathit b}}$ + $\not E_T$, higgsino-like neutralino, GMSB 24 AAD 2013 R ATLS ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ , RPV, ${{\mathit \lambda}_{{{211}}}^{\,'}}{}\not=$ 0 25 AALTONEN 2013 I CDF ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ , $\not E_T$, GMSB $> 220$ 95 26 CHATRCHYAN 2013 AH CMS ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ , GMSB, SPS8, $\mathit c{{\mathit \tau}}$ $<$ 500 mm 27 AAD 2012 CP ATLS 2${{\mathit \gamma}}$ +$\not E_T$, GMSB 28 AAD 2012 CT ATLS ${}\geq{}4{{\mathit \ell}^{\pm}}$, RPV 29 AAD 2012 R ATLS ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \mu}}{{\mathit j}}{{\mathit j}}$ , RPV, ${{\mathit \lambda}_{{{211}}}^{\,'}}{}\not=$ 0 30 ABAZOV 2012 AD D0 ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit Z}}{{\widetilde{\mathit G}}}{{\widetilde{\mathit G}}}$ , GMSB 31 CHATRCHYAN 2012 BK CMS 2${{\mathit \gamma}}$ + $\not E_T$, GMSB 32 CHATRCHYAN 2011 B CMS ${{\widetilde{\mathit W}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ , ${{\widetilde{\mathit W}}^{\pm}}$ $\rightarrow$ ${{\mathit \ell}^{\pm}}{{\widetilde{\mathit G}}}$ , GMSB $> 149$ 95 33 AALTONEN 2010 CDF ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\widetilde{\mathit \chi}}}{{\widetilde{\mathit \chi}}}$ , ${{\widetilde{\mathit \chi}}}={{\widetilde{\mathit \chi}}_{{{2}}}^{0}}$, ${{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}$, ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ , GMSB $> 175$ 95 34 ABAZOV 2010 P D0 ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ , GMSB $> 125$ 95 35 ABAZOV 2008 F D0 ${{\mathit p}}$ ${{\overline{\mathit p}}}$ $\rightarrow$ ${{\widetilde{\mathit \chi}}}{{\widetilde{\mathit \chi}}}$ , ${{\widetilde{\mathit \chi}}}={{\widetilde{\mathit \chi}}_{{{2}}}^{0}}$, ${{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}$, ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ , GMSB 36 ABULENCIA 2007 H CDF RPV, $\mathit LL\bar E$ $> 96.8$ 95 37 ABBIENDI 2006 B OPAL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\widetilde{\mathit B}}}{{\widetilde{\mathit B}}}$ , ( ${{\widetilde{\mathit B}}}$ $\rightarrow$ ${{\widetilde{\mathit G}}}{{\mathit \gamma}}$ ) 38 ABDALLAH 2005 B DLPH ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\widetilde{\mathit G}}}{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ , ( ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\widetilde{\mathit G}}}{{\mathit \gamma}}$ ) $> 96$ 95 39 ABDALLAH 2005 B DLPH ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\widetilde{\mathit B}}}{{\widetilde{\mathit B}}}$ , ( ${{\widetilde{\mathit B}}}$ $\rightarrow$ ${{\widetilde{\mathit G}}}{{\mathit \gamma}}$ ) 1  AAD 2021Y searched in 139 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for supersymmetry in events with four or more leptons (electrons, muons and tau-leptons). No significant excess above the Standard Model expectations is observed. Limits are set on Tchi1n12-GGM, and RPV models similar to Tchi1n2I, Tglu1A (with ${{\mathit q}}$ = ${{\mathit u}}$, ${{\mathit d}}$, ${{\mathit s}}$, ${{\mathit c}}$, ${{\mathit b}}$, with equal branching fractions), and ${{\widetilde{\mathit \ell}}_{{{L}}}}$ $/$ ${{\widetilde{\mathit \nu}}}$ $\rightarrow$ ${{\mathit \ell}}$ $/$ ${{\mathit \nu}}{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ (mass-degenerate ${{\widetilde{\mathit \ell}}_{{{L}}}}$ and ${{\widetilde{\mathit \nu}}}$ of all 3 generations), all with ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \ell}^{\pm}}{{\mathit \ell}^{\mp}}{{\mathit \nu}}$ via ${{\mathit \lambda}_{{{12k}}}}$ or ${{\mathit \lambda}_{{{i 33}}}}$ (where $\mathit i,k$ $\in$ 1,2), see their Figure 11. 2  AAIJ 2021V searched in 5.38 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for long-lived particles (LLP) decaying to ${{\mathit e}^{\pm}}{{\mathit \mu}^{\mp}}{{\mathit \nu}}$ . The LLP can be a ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ in RPV SUSY, or a right-handed neutrino, and can be produced in pairs, in the decay of the Higgs boson, or from charged current processes. No significant excess above the Standard Model expectations is observed. Limits are set on the cross section times branching ratio for all three production mechanisms, see their Figures $6 - 8$. 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 2021M searched in 137 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for supersymmetry in events with two opposite-sign same-flavor leptons (electrons, muons) and $\not E_T$. No significant excess above the Standard Model expectations is observed. Limits are set on the gluino mass in the simplified model Tglu4C, see their Figure 10, on the ${{\widetilde{\mathit \chi}}_{{{2}}}^{0}}$ and ${{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}$ mass in Tchi1n2Fa, see their Figure 11, on the ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ mass in Tn1n1C and Tn1n1B for ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{{2}}}^{0}}}={\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}}={\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}}$, see their Figure 12. Limits are also set on the light squark mass for the simplified model Tsqk2A, on the sbottom mass in Tsbot3, see their Figure 13, and on the slepton mass in direct electroweak pair production of mass-degenerate left- and right-handed sleptons (selectrons and smuons), see their Figure 14. 5  AAD 2020AN searched in 139 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events with two photons and missing transverse momentum. Events are further categorised in terms of lepton or jet multiplicity. No significant excess over the expected background is observed. Limits at 95$\%$ C.L. are set on the Higgsino mass in the T1n1n1A simplified model, see their Figure 11. 6  SIRUNYAN 2019CA searched in 77.4 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events containing delayed photons in both single and diphoton plus $\not E_T$ final states. No excess is observed above the background expected from Standard Model processes. The results are used to set 95$\%$ C.L. exclusion limits in the context of GMSB, using the SPS8 benchmark model. For neutralino proper decay lengths of 0.1, 1, 10, and 100 m, masses up to about 320, 525, 360, and 215 GeV are excluded, respectively. See their Fig. 5. The searches involve the simplified models Tglu1D, Tglu4A,B,C, Tsqk4,4A,4B. 7  SIRUNYAN 2019CI searched in 77.5 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events with one or more high-momentum Higgs bosons, decaying to pairs of photons, jets and $\not E_T$. No significant excess above the Standard Model expectations is observed. Limits are set on the sbottom mass in the Tsbot4 simplified model, see Figure 3, and on the wino mass in the Tchi1n2E simplified model, see their Figure 4. Limits are also set on the higgsino mass in the Tn1n1A and Tn1n1B simplified models, see their Figure 5. 8  SIRUNYAN 2019K searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events with a photon, an electron or muon, and large $\not E_T$. No significant excess above the Standard Model expectations is observed. In the framework of GMSB, limits are set on the chargino and neutralino mass in the Tchi1n1A simplified model, see their Figure 6. Limits are also set on the gluino mass in the Tglu4A simplified model, and on the squark mass in the Tsqk4A simplified model, see their Figure 7. 9  AABOUD 2018CK searched for events with at least 3 ${{\mathit b}}$-jets and large missing transverse energy in two datasets of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV of 36.1 ${\mathrm {fb}}{}^{-1}$ and 24.3 ${\mathrm {fb}}{}^{-1}$ depending on the trigger requirements. The analyses aimed to reconstruct two Higgs bosons decaying to pairs of ${{\mathit b}}$-quarks. No significant excess above the Standard Model expectations is observed. Limits are set on the Higgsino mass in the Tn1n1A simplified model, see their Figure 15(a). Constraints are also presented as a function of the BR of Higgsino decaying into an higgs boson and a gravitino, see their Figure 15(b). 10  AABOUD 2018Z searched in 36.1 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events containing four or more charged leptons (electrons, muons and up to two hadronically decaying taus). No significant deviation from the expected SM background is observed. Limits are set on the Higgsino mass in simplified models of general gauge mediated supersymmetry Tn1n1A/Tn1n1B/Tn1n1C, see their Figure 9. Limits are also set on the wino, slepton, sneutrino and gluino mass in a simplified model of NLSP pair production with R-parity violating decays of the LSP via ${{\mathit \lambda}_{{{12k}}}}$ or ${{\mathit \lambda}_{{{i33}}}}$ to charged leptons, see their Figures 7, 8. 11  SIRUNYAN 2018AO searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for direct electroweak production of charginos and neutralinos in events with either two or more leptons (electrons or muons) of the same electric charge, or with three or more leptons, which can include up to two hadronically decaying tau leptons. No significant excess above the Standard Model expectations is observed. Limits are set on the chargino/neutralino mass in the Tchi1n2A, Tchi1n2H, Tchi1n2D, Tchi1n2E and Tchi1n2F simplified models, see their Figures 14, 15, 16, 17 and 18. Limits are also set on the higgsino mass in the Tn1n1A, Tn1n1B and Tn1n1C simplified models, see their Figure 19. 12  SIRUNYAN 2018AP searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for direct electroweak production of charginos and neutralinos by combining a number of previous and new searches. No significant excess above the Standard Model expectations is observed. Limits are set on the chargino/neutralino mass in the Tchi1n2E, Tchi1n2F and Tchi1n2I simplified models, see their Figures 7, 8, 9 an 10. Limits are also set on the higgsino mass in the Tn1n1A, Tn1n1B and Tn1n1C simplified models, see their Figure 11, 12, 13 and 14. 13  SIRUNYAN 2018AR searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events containing two opposite-charge, same-flavour leptons (electrons or muons), jets and $\not E_T$. No significant excess above the Standard Model expectations is observed. Limits are set on the gluino mass in the Tglu4C simplified model, see their Figure 7. Limits are also set on the chargino/neutralino mass in the Tchi1n2F simplified models, see their Figure 8, and on the higgsino mass in the Tn1n1B and Tn1n1C simplified models, see their Figure 9. Finally, limits are set on the sbottom mass in the Tsbot3 simplified model, see their Figure 10. 14  SIRUNYAN 2018O searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events with two Higgs bosons, decaying to pairs of ${{\mathit b}}$-quarks, and large $\not E_T$. No significant excess above the Standard Model expectations is observed. Limits are set on the Higgsino mass in the T1n1n1A simplified model, see their Figure 9. 15  SIRUNYAN 2018X searched in 35.9 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events with one or more high-momentum Higgs bosons, decaying to pairs of photons, jets and $\not E_T$. The razor variables (${{\mathit M}_{{{R}}}}$ and ${{\mathit R}^{2}}$) are used to categorise the events. No significant excess above the Standard Model expectations is observed. Limits are set on the sbottom mass in the Tsbot4 simplified model and on the wino mass in the Tchi1n2E simplified model, see their Figure 5. Limits are also set on the higgsino mass in the Tn1n1A and Tn1n1B simplified models, see their Figure 6. 16  KHACHATRYAN 2014L searched in 19.5 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for evidence of direct pair production of neutralinos with Higgs or ${{\mathit Z}}$-bosons in the decay chain, leading to ${{\mathit H}}{{\mathit H}}$ , ${{\mathit H}}{{\mathit Z}}$ and ${{\mathit Z}}{{\mathit Z}}$ final states with missing transverse energy. The decays of $16 - 20$. a Higgs boson to a ${{\mathit b}}$-quark pair, to a photon pair, and to final states with leptons are considered in conjunction with hadronic and leptonic decay modes of the ${{\mathit Z}}$ and ${{\mathit W}}$ bosons. No significant excesses over the expected SM backgrounds are observed. The results are interpreted in the context of GMSB simplified models where the decays ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit H}}{{\widetilde{\mathit G}}}$ or ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit Z}}{{\widetilde{\mathit G}}}$ take place either 100$\%$ or 50$\%$ of the time, see Figs. $16 - 20$. 17  AAD 2020D searched in 32.8 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for events containing an oppositely charge lepton pair ( ${{\mathit e}}{{\mathit e}}$ , ${{\mathit \mu}}{{\mathit \mu}}$ or ${{\mathit e}}{{\mathit \mu}}$ ) coming from long-lived neutralinos decaying through the R-parity-violating decay ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \ell}}{{\mathit \ell}}{{\mathit \nu}}$ with ${{\mathit \lambda}_{{{121}}}}{}\not=$ 0 or ${{\mathit \lambda}_{{{122}}}}{}\not=$ 0. No excess over the expected background is observed. Limits are derived for decay lengths of the neutralino between 1 mm and 10 m in a scenario where a squark-antisquark pair is produced, with the squark decaying to a quark and a ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$, with either ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit e}}{{\mathit e}}{{\mathit \nu}}$ $/$ ${{\mathit e}}{{\mathit \mu}}{{\mathit \nu}}$ (${{\mathit \lambda}_{{{121}}}}{}\not=$ 0) or ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit e}}{{\mathit \mu}}{{\mathit \nu}}$ $/$ ${{\mathit \mu}}{{\mathit \mu}}{{\mathit \nu}}$ (${{\mathit \lambda}_{{{122}}}}{}\not=$ 0), see their Figures 4 and 5. 18  AABOUD 2019G searched in 32.9 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 13 TeV for evidence of neutralinos decaying into a ${{\mathit Z}}$-boson and a gravitino, in events characterized by the presence of dimuon vertices with displacements from the ${{\mathit p}}{{\mathit p}}$ interaction point in the range of 1400 cm. Neutralinos are assumed to be produced in the decay chain of gluinos as in Tglu1A models. No significant excess is observed in the number of vertices relative to the predicted background. In GGM with a gluino mass of 1100 GeV, neutralino masses in the range $300 - 1000$ GeV are excluded for certain values of c${{\mathit \tau}}$, see their Figure 7. 19  AAIJ 2017Z searched in 1 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV and in 2 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for events containing a displaced vertex with one associated high transverse momentum ${{\mathit \mu}}$. No excess is observed above the background expected from Standard Model processes. The results are used to set 95$\%$ C.L. upper limits on the cross section times branching fractions of pair-produced neutralinos decaying non-promptly into a muon and two quarks. Long-lived particles in a mass range $23 - 198$ GeV are considered, see their Fig. 5 and Fig. 6. 20  KHACHATRYAN 2016BX searched in 19.5 ${\mathrm {fb}}{}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for events containing 3 or more leptons coming from the electroweak production of wino- or higgsino-like neutralinos, assuming non-zero R-parity-violating leptonic couplings ${{\mathit \lambda}_{{{122}}}}$, ${{\mathit \lambda}_{{{123}}}}$, and ${{\mathit \lambda}_{{{233}}}}$ or semileptonic couplings ${{\mathit \lambda}_{{{131}}}^{\,'}}$, ${{\mathit \lambda}_{{{233}}}^{\,'}}$, ${{\mathit \lambda}_{{{331}}}^{\,'}}$, and ${{\mathit \lambda}_{{{333}}}^{\,'}}$. No excess over the expected background is observed and limits are derived on the neutralino mass, see Figs. 24 and 25. 21  AAD 2014BH searched in 20.3 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 8 TeV for events containing non-pointing photons in a diphoton plus missing transverse energy final state. No excess is observed above the background expected from Standard Model processes. The results are used to set 95$\%$ C.L. exclusion limits in the contact of gauge-mediated supersymmetric breaking models, with the lightest neutralino being the next-to-lightest supersymmetric particle and decaying with a lifetime in the range from 0.25 ns to about 100 ns into a photon and a gravitino. For limits on the NLSP lifetime versus $\Lambda $ plane, for the SPS8 model, see their Fig. 7. 22  AAD 2013AP searched in 4.8 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV for events containing non-pointing photons in a diphoton plus missing transverse energy final state. No excess is observed above the background expected from Standard Model processes. The results are used to set 95$\%$ C.L. exclusion limits in the context of gauge-mediated supersymmetric breaking models, with the lightest neutralino being the next-to-lightest supersymmetric particle and decaying with a lifetime in excess of 0.25 ns into a photon and a gravitino. For limits in the NLSP lifetime versus ${{\mathit \Lambda}}$ plane, for the SPS8 model, see their Fig. 8. 23  AAD 2013Q searched in 4.7 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV for events containing a high-$p_T$ isolated photon, at least one jet identified as originating from a bottom quark, and high missing transverse momentum. Such signatures may originate from supersymmetric models with gauge-mediated supersymmetry breaking in events in which one of a pair of higgsino-like neutralinos decays into a photon and a gravitino while the other decays into a Higgs boson and a gravitino. No significant excess above the expected background was found and limits were set on the neutralino mass in a generalized GMSB model (GGM) with a higgsino-like neutralino NLSP, see their Fig. 4. Intermediate neutralino masses between 220 and 380 GeV are excluded at 95$\%$ C.L, regardless of the squark and gluino masses, purely on the basis of the expected weak production. 24  AAD 2013R looked in 4.4 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV for events containing new, heavy particles that decay at a significant distance from their production point into a final state containing a high-momentum muon and charged hadrons. No excess over the expected background is observed and limits are placed on the production cross-section of neutralinos via squarks for various ${\mathit m}_{{{\widetilde{\mathit q}}}}$, ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}}$ in an R-parity violating scenario with ${{\mathit \lambda}_{{{211}}}^{\,'}}{}\not=$ 0, as a function of the neutralino lifetime, see their Fig. 6. 25  AALTONEN 2013I searched in 6.3 fb${}^{-1}$ of ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\sqrt {s }$ = 1.96 TeV for events containing $\not E_T$ and a delayed photon that arrives late in the detector relative to the time expected from prompt production. No evidence of delayed photon production is observed. 26  CHATRCHYAN 2013AH searched in 4.9 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV for events containing $\not E_T$ and a delayed photon that arrives late in the detector relative to the time expected from prompt production. No significant excess above the expected background was found and limits were set on the pair production of ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ depending on the neutralino proper decay length, see Fig. 8. Supersedes CHATRCHYAN 2012BK. 27  AAD 2012CP searched in 4.8 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV for events with two photons and large $\not E_T$ due to ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ decays in a GMSB framework. No significant excess above the expected background was found and limits were set on the neutralino mass in a generalized GMSB model (GGM) with a bino-like neutralino NLSP, see Figs. 6 and 7. The other sparticle masses were decoupled, tan ${{\mathit \beta}}$ = 2 and $\mathit c{{\mathit \tau}_{{{NLSP}}}}$ $<$ 0.1 mm. Also, in the framework of the SPS8 model, limits are presented in Fig. 8. 28  AAD 2012CT searched in 4.7 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV for events containing four or more leptons (electrons or muons) and either moderate values of missing transverse momentum or large effective mass. No significant excess is found in the data. Limits are presented in a simplified model of $\mathit R$-parity violating supersymmetry in which charginos are pair-produced and then decay into a ${{\mathit W}}$-boson and a ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$, which in turn decays through an RPV coupling into two charged leptons ( ${{\mathit e}^{\pm}}{{\mathit e}^{\mp}}$ or ${{\mathit \mu}^{\pm}}{{\mathit \mu}^{\mp}}$ ) and a neutrino. In this model, limits are set on the neutralino mass as a function of the chargino mass, see Fig. 3a. Limits are also set in an $\mathit R$-parity violating mSUGRA model, see Fig. 3b. 29  AAD 2012R looked in 33 pb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV for events containing new, heavy particles that decay at a significant distance from their production point into a final state containing a high-momentum muon and charged hadrons. No excess over the expected background is observed and limits are placed on the production cross-section of neutralinos via squarks for various (${\mathit m}_{{{\widetilde{\mathit q}}}}$, ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}}$) in an R-parity violating scenario with ${{\mathit \lambda}}{}^{'}_{211}{}\not=$ 0, as a function of the neutralino lifetime, see their Fig. 8. Superseded by AAD 2013R. 30  ABAZOV 2012AD looked in 6.2 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 1.96 TeV for events with a photon, a ${{\mathit Z}}$-boson, and large $\not E_T$ in the final state. This topology corresponds to a GMSB model where pairs of neutralino NLSPs are either pair produced promptly or from decays of other supersymmetric particles and then decay to either ${{\mathit Z}}{{\widetilde{\mathit G}}}$ or ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ . No significant excess over the SM expectation is observed and a limit at 95$\%$ C.L. on the cross section is derived as a function of the effective SUSY breaking scale ${{\mathit \Lambda}}$, see Fig. 3. Assuming ${{\mathit N}_{{{mes}}}}$ = 2, ${{\mathit M}_{{{mes}}}}$ = 3 ${{\mathit \Lambda}}$, tan ${{\mathit \beta}}$ = 3, ${{\mathit \mu}}$ = 0.75 ${{\mathit M}_{{{1}}}}$, and ${{\mathit C}_{{{grav}}}}$ = 1, the model is excluded at 95$\%$ C.L. for values of ${{\mathit \Lambda}}$ $<$ 87 TeV. 31  CHATRCHYAN 2012BK searched in 2.23 fb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$ = 7 TeV for events with two photons and large $\not E_T$ due to ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ decays in a GMSB framework. No significant excess above the expected background was found and limits were set on the pair production of ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ depending on the neutralino lifetime, see Fig. 6. 32  CHATRCHYAN 2011B looked in 35 pb${}^{-1}$ of ${{\mathit p}}{{\mathit p}}$ collisions at $\sqrt {s }$=7 TeV for events with an isolated lepton (${{\mathit e}}$ or ${{\mathit \mu}}$), a photon and $\not E_T$ which may arise in a generalized gauge mediated model from the decay of Wino-like NLSPs. No evidence for an excess over the expected background is observed. Limits are derived in the plane of squark/gluino mass versus Wino mass (see Fig. 4). Mass degeneracy of the produced squarks and gluinos is assumed. 33  AALTONEN 2010 searched in 2.6 fb${}^{-1}$ of ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\sqrt {s }$ = 1.96 TeV for diphoton events with large $\not E_T$. They may originate from the production of ${{\widetilde{\mathit \chi}}^{\pm}}$ in pairs or associated to a ${{\widetilde{\mathit \chi}}_{{{2}}}^{0}}$, decaying into ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ which itself decays in GMSB to ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ . There is no excess of events beyond expectation. An upper limit on the cross section is calculated in the GMSB model as a function of the ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ mass and lifetime, see their Fig. 2. A limit is derived on the ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ mass of 149 GeV for ${\mathit \tau}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}}{}\ll$1 ns, which improves the results of previous searches. 34  ABAZOV 2010P looked in 6.3 fb${}^{-1}$ of ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\sqrt {s }$ = 1.96 TeV for events with at least two isolated ${{\mathit \gamma}}$s and large $\not E_T$. These could be the signature of ${{\widetilde{\mathit \chi}}_{{{2}}}^{0}}$ and ${{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}$ production, decaying to ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ and finally ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ in a GMSB framework. No significant excess over the SM expectation is observed, and a limit at 95$\%$ C.L. on the cross section is derived for ${{\mathit N}_{{{mes}}}}$ = 1, tan ${{\mathit \beta}}$ = 15 and ${{\mathit \mu}}$ $>$ 0, see their Fig. 2. This allows them to set a limit on the effective SUSY breaking scale ${{\mathit \Lambda}}$ $>$ 124 TeV, from which the excluded ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ mass range is obtained. 35  ABAZOV 2008F looked in 1.1 fb${}^{-1}$ of ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\sqrt {s }$ = 1.96 TeV for diphoton events with large $\not E_T$. They may originate from the production of ${{\widetilde{\mathit \chi}}^{\pm}}$ in pairs or associated to a ${{\widetilde{\mathit \chi}}_{{{2}}}^{0}}$, decaying to a ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ which itself decays promptly in GMSB to ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ $\rightarrow$ ${{\mathit \gamma}}{{\widetilde{\mathit G}}}$ . No significant excess was found compared to the background expectation. A limit is derived on the masses of SUSY particles in the GMSB framework for $\mathit M$ = 2$\Lambda $, $\mathit N$ = 1, tan $\beta $ = 15 and $\mu $ $>$ 0, see Figure$~$2. It also excludes $\Lambda $ $<$ 91.5 TeV. Supersedes the results of ABAZOV 2005A. Superseded by ABAZOV 2010P. 36  ABULENCIA 2007H searched in 346 pb${}^{-1}$ of ${{\mathit p}}{{\overline{\mathit p}}}$ collisions at $\sqrt {s }$ = 1.96 TeV for events with at least three leptons (${{\mathit e}}$ or ${{\mathit \mu}}$) from the decay of ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ via $\mathit LL\bar E$ couplings. The results are consistent with the hypothesis of no signal. Upper limits on the cross-section are extracted and a limit is derived in the framework of mSUGRA on the masses of ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ and ${{\widetilde{\mathit \chi}}_{{{1}}}^{\pm}}$, see e.g. their Fig. 3 and Tab. II. 37  ABBIENDI 2006B use 600 pb${}^{-1}$ of data from $\sqrt {s }$ = $189 - 209$ GeV. They look for events with diphotons + $\not E$ final states originating from prompt decays of pair-produced neutralinos in a GMSB scenario with ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ NLSP. Limits on the cross-section are computed as a function of m(${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$), see their Fig. 14. The limit on the ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ mass is for a pure Bino state assuming a prompt decay, with lifetimes up to $10^{-9}$s. Supersedes the results of ABBIENDI 2004N. 38  ABDALLAH 2005B use data from $\sqrt {s }$ = $180 - 209$~GeV. They look for events with single photons + $\not E$ final states. Limits are computed in the plane (m(${{\widetilde{\mathit G}}}$) , m(${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$)), shown in their Fig. 9b for a pure Bino state in the GMSB framework and in Fig. 9c for a no-scale supergravity model. Supersedes the results of ABREU 2000Z. 39  ABDALLAH 2005B use data from $\sqrt {s }$ = $130 - 209$~GeV. They look for events with diphotons + $\not E$ final states and single photons not pointing to the vertex, expected in GMSB when the ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ is the NLSP. Limits are computed in the plane (m(${{\widetilde{\mathit G}}}$), m(${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$)), see their Fig. 10. The lower limit is derived on the ${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$ mass for a pure Bino state assuming a prompt decay and ${\mathit m}_{{{\widetilde{\mathit e}}_{{{R}}}}}$ = ${\mathit m}_{{{\widetilde{\mathit e}}_{{{L}}}}}$ = 2 ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}}$. It improves to 100~GeV for ${\mathit m}_{{{\widetilde{\mathit e}}_{{{R}}}}}$ = ${\mathit m}_{{{\widetilde{\mathit e}}_{{{L}}}}}$ = 1.1 ${\mathit m}_{{{\widetilde{\mathit \chi}}_{{{1}}}^{0}}}$. and the limit in the plane (m(${{\widetilde{\mathit \chi}}_{{{1}}}^{0}}$), m(${{\widetilde{\mathit e}}_{{{R}}}}$)) is shown in Fig. 10b. For long-lived neutralinos, cross-section limits are displayed in their Fig 11. Supersedes the results of ABREU 2000Z.

References:

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