Unstable χ~10 (Lightest Neutralino) mass limit

INSPIRE   PDGID:
S046UPH
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 mG~ is assumed to be negligible relative to all other masses. In the following, G~ is assumed to be undetected and to give rise to a missing energy () signature.

Some earlier papers are now obsolete and have been omitted. They were last listed in our PDG 2014 edition: K. Olive, et al. (Particle Data Group), Chinese Physics C38 070001 (2014) (http://pdg.lbl.gov).

VALUE (GeV) CL% DOCUMENT ID TECN  COMMENT
>900 95 1
AAD
2023AE
ATLS 2 SFOS , jets, T, Tn1n1C, mχ~10 = 1 GeV
>365 95 2
AAD
2023AM
ATLS long-lived χ~10, displaced diphoton vertex, Tn1n1A, τ = 2 ns
>605 95 2
AAD
2023AM
ATLS long-lived χ~10, displaced diphoton vertex, Tn1n1B, τ = 2 ns
>705 95 2
AAD
2023AM
ATLS long-lived χ~10, displaced diphoton vertex, Tn1n1C, τ = 2 ns
>440 95 3
AAD
2023CP
ATLS 2 same-sign or 3 , Tn1n1D, bRPV higgsino decays to νW, W
>1180 95 4
TUMASYAN
2023AO
CMS long-lived χ~10,2 trackless delayed jets + T, Tn1n1B, cτ = 0.5 m
>990 95 4
TUMASYAN
2023AO
CMS long-lived χ~10, 2 trackless delayed jets + T, Tn1n1B, cτ = 3 m
>540 95 5
AAD
2021Y
ATLS 4, Tchi1n12-GGM, χ~10 ZG~
none 7 - 50 95 6
AAIJ
2021V
LHCB e±μ, RPV χ~10 e±μν, 2 ps < τ < 50 ps
>1100 95 7
SIRUNYAN
2021AF
CMS long-lived χ~10, RPV χ~10 , λ323 coupling, 0.6 mm < cτ < 70 mm
>800 95 8
SIRUNYAN
2021M
CMS ± + T, Tn1n1C
>650 95 8
SIRUNYAN
2021M
CMS ± + T, Tn1n1B
>380 95 9
AAD
2020AN
ATLS 2γ + T,Tn1n1A, GMSB
>525 95 10
SIRUNYAN
2019CA
CMS χ~10 γG~, GMSB, SPS8, cτ=1 m
>290 95 11
SIRUNYAN
2019CI
CMS 1 H ( γγ) + jets + T, Tn1n1A, GMSB
>230 95 11
SIRUNYAN
2019CI
CMS 1 H ( γγ) + jets + T, Tn1n1B , GMSB
>930 95 12
SIRUNYAN
2019K
CMS γ + lepton + T, Tchi1n1A
none 130 - 230, 290 - 880 95 13
AABOUD
2018CK
ATLS 2H ( bb)+T,Tn1n1A, GMSB
>295 95 14
AABOUD
2018Z
ATLS 4, GMSB, Tn1n1C
>180 95 15
SIRUNYAN
2018AO
CMS ±± or 3 , Tn1n1A
>260 95 15
SIRUNYAN
2018AO
CMS ±± or 3 , Tn1n1B
>450 95 15
SIRUNYAN
2018AO
CMS ±± or 3 , Tn1n1C
>750 95 16
SIRUNYAN
2018AP
CMS Combination of searches, GMSB, Tn1n1A
>650 95 16
SIRUNYAN
2018AP
CMS Combination of searches, GMSB, Tn1n1B
>690 95 16
SIRUNYAN
2018AP
CMS Combination of searches, GMSB, Tn1n1C
>500 95 17
SIRUNYAN
2018AR
CMS ±+ jets +T, GMSB, Tn1n1B
>650 95 17
SIRUNYAN
2018AR
CMS ±+ jets +T, GMSB, Tn1n1C
none 230 - 770 95 18
SIRUNYAN
2018O
CMS 2 H ( bb) + T, Tn1n1A, GMSB
>205 95 19
SIRUNYAN
2018X
CMS 1 H ( γγ) + jets + T, Tn1n1A, GMSB
>130 95 19
SIRUNYAN
2018X
CMS 1 H ( γγ) + jets + T, Tn1n1B , GMSB
>380 95 20
KHACHATRYAN
2014L
CMS χ~10 ZG~ simplified models, GMSB, RPV
• • We do not use the following data for averages, fits, limits, etc. • •
21
AAD
2020D
q~ qχ~10, χ~10 ν, RPV, λ121 or λ1220
none 300 - 1000 95 22
AABOUD
2019G
ATLS χ~10 ZG~ from gluinos as in Tglu1A, GMSB, depending on cτ
23
AAIJ
2017Z
displaced vertex with associated μ
24
KHACHATRYAN
2016BX
CMS 3±, RPV, λ or λ couplings, wino- or higgsino-like neutralinos
25
AAD
2014BH
ATLS 2γ + T, GMSB, SPS8
26
AAD
2013AP
ATLS 2γ + T, GMSB, SPS8
none 220 - 380 95 27
AAD
2013Q
ATLS γ + b + T, higgsino-like neutralino, GMSB
28
AAD
2013R
ATLS χ~10 μjj, RPV, λ211 0
29
AALTONEN
2013I
CDF χ~10 γG~, T, GMSB
>220 95 30
CHATRCHYAN
2013AH
CMS χ~10 γG~, GMSB, SPS8, cτ < 500 mm
31
AAD
2012CP
ATLS 2γ +T, GMSB
32
AAD
2012CT
ATLS 4±, RPV
33
AAD
2012R
ATLS χ~10 μjj, RPV, λ211 0
34
ABAZOV
2012AD
D0 χ~10 χ~10 γZG~G~, GMSB
35
CHATRCHYAN
2012BK
CMS 2γ + T, GMSB
36
CHATRCHYAN
2011B
CMS W~0 γG~, W~± ±G~, GMSB
>149 95 37
AALTONEN
2010
CDF p p χ~χ~, χ~=χ~20, χ~1±, χ~10 γG~, GMSB
>175 95 38
ABAZOV
2010P
D0 χ~10 γG~, GMSB
>125 95 39
ABAZOV
2008F
D0 p p χ~χ~, χ~=χ~20, χ~1±, χ~10 γG~, GMSB
40
ABULENCIA
2007H
CDF RPV, LLE¯
>96.8 95 41
ABBIENDI
2006B
OPAL e+ e B~B~, ( B~ G~γ)
42
ABDALLAH
2005B
DLPH e+ e G~χ~10, ( χ~10 G~γ)
>96 95 43
ABDALLAH
2005B
DLPH e+ e B~B~, ( B~ G~γ)
1  AAD 2023AE searched in 139 fb1 of pp collisions at s = 13 TeV for events with 2 with same flavour and opposite sign, plus jets and T, defining signal region with the dilepton invariant mass both on- and off-shell with respect to the Z boson. No significant excess above the Standard Model predictions is observed. Limits are set on models of strong and electroweak production. In this case, limits are placed on production of mass-degenerate, higgsino triplet NLSP with χ~10 ZG~ in a GGM-like scenario, see figure 15.
2  AAD 2023AM searched in 139 fb1 of pp collisions at s = 13 TeV for events containing electron/photon pairs with invariant mass compatible with h/Z and originating from a common displaced vertex. No significant excess above the Standard Model predictions is observed. Limits are set on a model where members of a nearly degenerate higgsino triplet are pair-produced, yielding long-lived χ~10 followed by χ~10 h / ZG~. Limits are set on mχ~10 as a function of its lifetime and of the B( χ~10 hG~) assuming B( χ~10 hG~) + B( χ~10 ZG~) = 1, see Figure 10.
3  AAD 2023CP searched in 139 fb1 of pp collisions at s = 13 TeV for events with 2 with same charge or 3 plus at least one jet and T, defining signal region based on 'stransverse mass' of the dilepton system, T significance and effective mass. No significant excess above the Standard Model predictions is observed. Limits are set on the mass of a mass-degenerate higgsino triplet decaying into a lepton (neutral or charged) and a W via a bilinear RPV coupling, see figure 14.
4  TUMASYAN 2023AO searched in 138 fb1 of pp collisions at s = 13 TeV for evidence of neutralino-chargino production in events with nearly trackless and out-of-time jets that are used to identify decays of long-lived particles. No significant excess above the Standard Model expectations is observed. Limits are set on the mass of the long-lived χ~10 in the model Tn1n1B, see their figures 810.
5  AAD 2021Y searched in 139 fb1 of pp collisions at 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 q = u, d, s, c, b, with equal branching fractions), and ~L / ν~ / νχ~10 (mass-degenerate ~L and ν~ of all 3 generations), all with χ~10 ±ν via λ12k or λi33 (where i,k 1,2), see their Figure 11.
6  AAIJ 2021V searched in 5.38 fb1 of pp collisions at s = 13 TeV for long-lived particles (LLP) decaying to e±μν. The LLP can be a χ~10 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 68.
7  SIRUNYAN 2021AF searched in 140 fb1 of pp collisions at 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 λ323 coupling, on the χ~10 mass in an RPV model with χ~10 pair production and the RPV decay χ~10 with λ323 coupling and on the t~ mass in an RPV model with top squark pair production and the RPV decay t~ didj with λ3ij coupling, see their Figure 7.
8  SIRUNYAN 2021M searched in 137 fb1 of pp collisions at s = 13 TeV for supersymmetry in events with two opposite-sign same-flavor leptons (electrons, muons) and 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 χ~20 and χ~1± mass in Tchi1n2Fa, see their Figure 11, on the χ~10 mass in Tn1n1C and Tn1n1B for mχ~20=mχ~1±=mχ~10, 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.
9  AAD 2020AN searched in 139 fb1 of pp collisions at 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.
10  SIRUNYAN 2019CA searched in 77.4 fb1 of pp collisions at s = 13 TeV for events containing delayed photons in both single and diphoton plus 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.
11  SIRUNYAN 2019CI searched in 77.5 fb1 of pp collisions at s = 13 TeV for events with one or more high-momentum Higgs bosons, decaying to pairs of photons, jets and 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.
12  SIRUNYAN 2019K searched in 35.9 fb1 of pp collisions at s = 13 TeV for events with a photon, an electron or muon, and large 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.
13  AABOUD 2018CK searched for events with at least 3 b-jets and large missing transverse energy in two datasets of pp collisions at s = 13 TeV of 36.1 fb1 and 24.3 fb1 depending on the trigger requirements. The analyses aimed to reconstruct two Higgs bosons decaying to pairs of 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).
14  AABOUD 2018Z searched in 36.1 fb1 of pp collisions at 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 λ12k or λi33 to charged leptons, see their Figures 7, 8.
15  SIRUNYAN 2018AO searched in 35.9 fb1 of pp collisions at 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.
16  SIRUNYAN 2018AP searched in 35.9 fb1 of pp collisions at 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.
17  SIRUNYAN 2018AR searched in 35.9 fb1 of pp collisions at s = 13 TeV for events containing two opposite-charge, same-flavour leptons (electrons or muons), jets and 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.
18  SIRUNYAN 2018O searched in 35.9 fb1 of pp collisions at s = 13 TeV for events with two Higgs bosons, decaying to pairs of b-quarks, and large 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.
19  SIRUNYAN 2018X searched in 35.9 fb1 of pp collisions at s = 13 TeV for events with one or more high-momentum Higgs bosons, decaying to pairs of photons, jets and T. The razor variables (MR and R2) 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.
20  KHACHATRYAN 2014L searched in 19.5 fb1 of pp collisions at s = 8 TeV for evidence of direct pair production of neutralinos with Higgs or Z-bosons in the decay chain, leading to HH, HZ and ZZ final states with missing transverse energy. The decays of 1620. a Higgs boson to a 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 Z and 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 χ~10 HG~ or χ~10 ZG~ take place either 100% or 50% of the time, see Figs. 1620.
21  AAD 2020D searched in 32.8 fb1 of pp collisions at s = 13 TeV for events containing an oppositely charge lepton pair (ee, μμ or eμ) coming from long-lived neutralinos decaying through the R-parity-violating decay χ~10 ν with λ121 0 or λ122 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 χ~10, with either χ~10 eeν / eμν (λ121 0) or χ~10 eμν / μμν (λ122 0), see their Figures 4 and 5.
22  AABOUD 2019G searched in 32.9 fb1 of pp collisions at s = 13 TeV for evidence of neutralinos decaying into a Z-boson and a gravitino, in events characterized by the presence of dimuon vertices with displacements from the pp 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 3001000 GeV are excluded for certain values of cτ, see their Figure 7.
23  AAIJ 2017Z searched in 1 fb1 of pp collisions at s = 7 TeV and in 2 fb1 of pp collisions at s = 8 TeV for events containing a displaced vertex with one associated high transverse momentum μ. 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 23198 GeV are considered, see their Fig. 5 and Fig. 6.
24  KHACHATRYAN 2016BX searched in 19.5 fb1 of pp collisions at 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 λ122, λ123, and λ233 or semileptonic couplings λ131, λ233, λ331, and λ333. No excess over the expected background is observed and limits are derived on the neutralino mass, see Figs. 24 and 25.
25  AAD 2014BH searched in 20.3 fb1 of pp collisions at 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 Λ plane, for the SPS8 model, see their Fig. 7.
26  AAD 2013AP searched in 4.8 fb1 of pp collisions at 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 Λ plane, for the SPS8 model, see their Fig. 8.
27  AAD 2013Q searched in 4.7 fb1 of pp collisions at s = 7 TeV for events containing a high-pT 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.
28  AAD 2013R looked in 4.4 fb1 of pp collisions at 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 mq~, mχ~10 in an R-parity violating scenario with λ211 0, as a function of the neutralino lifetime, see their Fig. 6.
29  AALTONEN 2013I searched in 6.3 fb1 of pp collisions at s = 1.96 TeV for events containing 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.
30  CHATRCHYAN 2013AH searched in 4.9 fb1 of pp collisions at s = 7 TeV for events containing 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 χ~10 depending on the neutralino proper decay length, see Fig. 8. Supersedes CHATRCHYAN 2012BK.
31  AAD 2012CP searched in 4.8 fb1 of pp collisions at s = 7 TeV for events with two photons and large T due to χ~10 γG~ 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 β = 2 and cτNLSP < 0.1 mm. Also, in the framework of the SPS8 model, limits are presented in Fig. 8.
32  AAD 2012CT searched in 4.7 fb1 of pp collisions at 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 R-parity violating supersymmetry in which charginos are pair-produced and then decay into a W-boson and a χ~10, which in turn decays through an RPV coupling into two charged leptons (e±e or μ±μ) 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 R-parity violating mSUGRA model, see Fig. 3b.
33  AAD 2012R looked in 33 pb1 of pp collisions at 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 (mq~, mχ~10) in an R-parity violating scenario with λ211 0, as a function of the neutralino lifetime, see their Fig. 8. Superseded by AAD 2013R.
34  ABAZOV 2012AD looked in 6.2 fb1 of pp collisions at s = 1.96 TeV for events with a photon, a Z-boson, and large 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 ZG~ or γG~. 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 Λ, see Fig. 3. Assuming Nmes = 2, Mmes = 3 Λ, tan β = 3, μ = 0.75 M1, and Cgrav = 1, the model is excluded at 95% C.L. for values of Λ < 87 TeV.
35  CHATRCHYAN 2012BK searched in 2.23 fb1 of pp collisions at s = 7 TeV for events with two photons and large T due to χ~10 γG~ decays in a GMSB framework. No significant excess above the expected background was found and limits were set on the pair production of χ~10 depending on the neutralino lifetime, see Fig. 6.
36  CHATRCHYAN 2011B looked in 35 pb1 of pp collisions at s=7 TeV for events with an isolated lepton (e or μ), a photon and 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.
37  AALTONEN 2010 searched in 2.6 fb1 of pp collisions at s = 1.96 TeV for diphoton events with large T. They may originate from the production of χ~± in pairs or associated to a χ~20, decaying into χ~10 which itself decays in GMSB to γG~. 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 χ~10 mass and lifetime, see their Fig. 2. A limit is derived on the χ~10 mass of 149 GeV for τχ~101 ns, which improves the results of previous searches.
38  ABAZOV 2010P looked in 6.3 fb1 of pp collisions at s = 1.96 TeV for events with at least two isolated γs and large T. These could be the signature of χ~20 and χ~1± production, decaying to χ~10 and finally χ~10 γG~ 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 Nmes = 1, tan β = 15 and μ > 0, see their Fig. 2. This allows them to set a limit on the effective SUSY breaking scale Λ > 124 TeV, from which the excluded χ~10 mass range is obtained.
39  ABAZOV 2008F looked in 1.1 fb1 of pp collisions at s = 1.96 TeV for diphoton events with large T. They may originate from the production of χ~± in pairs or associated to a χ~20, decaying to a χ~10 which itself decays promptly in GMSB to χ~10 γG~. 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 M = 2Λ, N = 1, tan β = 15 and μ > 0, see Figure 2. It also excludes Λ < 91.5 TeV. Supersedes the results of ABAZOV 2005A. Superseded by ABAZOV 2010P.
40  ABULENCIA 2007H searched in 346 pb1 of pp collisions at s = 1.96 TeV for events with at least three leptons (e or μ) from the decay of χ~10 via LLE¯ 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 χ~10 and χ~1±, see e.g. their Fig. 3 and Tab. II.
41  ABBIENDI 2006B use 600 pb1 of data from s = 189209 GeV. They look for events with diphotons + final states originating from prompt decays of pair-produced neutralinos in a GMSB scenario with χ~10 NLSP. Limits on the cross-section are computed as a function of m(χ~10), see their Fig. 14. The limit on the χ~10 mass is for a pure Bino state assuming a prompt decay, with lifetimes up to 109s. Supersedes the results of ABBIENDI 2004N.
42  ABDALLAH 2005B use data from s = 180209~GeV. They look for events with single photons + final states. Limits are computed in the plane (m(G~) , m(χ~10)), 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.
43  ABDALLAH 2005B use data from s = 130209~GeV. They look for events with diphotons + final states and single photons not pointing to the vertex, expected in GMSB when the χ~10 is the NLSP. Limits are computed in the plane (m(G~), m(χ~10)), see their Fig. 10. The lower limit is derived on the χ~10 mass for a pure Bino state assuming a prompt decay and me~R = me~L = 2 mχ~10. It improves to 100~GeV for me~R = me~L = 1.1 mχ~10. and the limit in the plane (m(χ~10), m(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
AAD 2023AM
PR D108 012012 Search in diphoton and dielectron final states for displaced production of Higgs or Z bosons with the ATLAS detector in s=13TeV pp collisions
AAD 2023AE
EPJ C83 515 Searches for new phenomena in events with two leptons, jets, and missing transverse momentum in 139 fb1 of \varvecs=13 TeV \varvecpp collisions with the ATLAS detector
AAD 2023CP
JHEP 2311 150 Search for direct production of winos and higgsinos in events with two same-charge leptons or three leptons in pp collision data at s=13 TeV with the ATLAS detector
TUMASYAN 2023AO
JHEP 2307 210 Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at s = 13 TeV
AAD 2021Y
JHEP 2107 167 Search for supersymmetry in events with four or more charged leptons in 139 fb1 of s = 13 TeV pp collisions with the ATLAS detector
AAIJ 2021V
EPJ C81 261 Search for long-lived particles decaying to e±μν
SIRUNYAN 2021M
JHEP 2104 123 Search for supersymmetry in final states with two oppositely charged same-flavor leptons and missing transverse momentum in proton-proton collisions at s= 13 TeV
SIRUNYAN 2021AF
PR D104 052011 Search for long-lived particles decaying to jets with displaced vertices in proton-proton collisions at s= 13 TeV
AAD 2020D
PL B801 135114 Search for displaced vertices of oppositely charged leptons from decays of long-lived particles in pp collisions at s =13 TeV with the ATLAS detector
AAD 2020AN
JHEP 2010 005 Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in pp collisions at 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 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 s= 13 TeV
SIRUNYAN 2019CI
JHEP 1911 109 Search for supersymmetry using Higgs boson to diphoton decays at s = 13 TeV
SIRUNYAN 2019K
JHEP 1901 154 Search for supersymmetry in events with a photon, a lepton, and missing transverse momentum in proton-proton collisions at s= 13 TeV
AABOUD 2018Z
PR D98 032009 Search for supersymmetry in events with four or more leptons in s=13 TeV pp collisions with ATLAS
AABOUD 2018CK
PR D98 092002 Search for pair production of higgsinos in final states with at least three b-tagged jets in s=13 TeV pp collisions using the ATLAS detector
SIRUNYAN 2018AP
JHEP 1803 160 Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at s= 13 TeV
SIRUNYAN 2018X
PL B779 166 Search for supersymmetry with Higgs boson to diphoton decays using the razor variables at s= 13 TeV
SIRUNYAN 2018O
PR D97 032007 Search for Higgsino pair production in pp collisions at s = 13  TeV in final states with large missing transverse momentum and two Higgs bosons decaying via Hbb¯
SIRUNYAN 2018AO
JHEP 1803 166 Search for electroweak production of charginos and neutralinos in multilepton final states in proton-proton collisions at s= 13 TeV
SIRUNYAN 2018AR
JHEP 1803 076 Search for new phenomena in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum in pp collisions at s=13 TeV
AAIJ 2017Z
EPJ C77 224 Search for Massive Long-Lived Particles Decaying Semileptonically in the LHCb Detector
KHACHATRYAN 2016BX
PR D94 112009 Searches for R-Parity-Violating Supersymmetry in pp Collisions at s = 8 TeV in Final States with 04 Leptons
AAD 2014BH
PR D90 112005 Search for Nonpointing and Delayed Photons in the Diphoton and Missing Transverse Momentum Final State in 8 TeV pp Collisions at the LHC using the ATLAS Detector
KHACHATRYAN 2014L
PR D90 092007 Searches for Electroweak Neutralino and Chargino Production in Channels with Higgs, Z, and W Bosons in pp Collisions at 8 TeV
AAD 2013R
PL B719 280 Search for Long-Lived, Heavy Particles in Final States with a Muon and Multi-Track Displaced Vertex in ProtonProton Collisions at s = 7 TeV with the ATLAS Detector
AAD 2013AP
PR D88 012001 Search for Nonpointing Photons in the Diphoton and ETmiss Final State in s = 7 TeV ProtonProton Collisions using the ATLAS Detector
AAD 2013Q
PL B719 261 Search for Supersymmetry in Events with Photons, Bottom Quarks, and Missing Transverse Momentum in ProtonProton Collisions at a Centre-of-Mass Energy of 7 TeV with the ATLAS Detector
AALTONEN 2013I
PR D88 031103 A Signature-Based Search for Delayed Photons in Exclusive Photon Plus Missing Transverse Energy Events from pp Collisions with s = 1.96 TeV
CHATRCHYAN 2013AH
PL B722 273 Search for Long-Lived Particles Decaying to Photons and Missing Energy in ProtonProton Collisions at s = 7 TeV
AAD 2012R
PL B707 478 Search for Displaced Vertices Arising from Decays of New Heavy Particles in 7 TeV pp Collisions at ATLAS
AAD 2012CT
JHEP 1212 124 Search for R-Parity-Violating Supersymmetry in Events with Four or More Leptons in s = 7 TeV pp Collisions with the ATLAS Detector
AAD 2012CP
PL B718 411 Search for Diphoton Events with Large Missing Transverse Momentum in 7 TeV ProtonProton Collision Data with the ATLAS Detector
ABAZOV 2012AD
PR D86 071701 Search for Zγ Events with Large Missing Transverse Energy in pp Collisions at s = 1.96 TeV
CHATRCHYAN 2012BK
JHEP 1211 172 Search for New Physics with Long-Lived Particles Decaying to Photons and Missing Energy in pp Collisions at s = 7 TeV
CHATRCHYAN 2011B
JHEP 1106 093 Search for Supersymmetry in Events with a Lepton, a Photon, and Large Missing Transverse Energy in pp Collisions at s = 7 TeV
AALTONEN 2010
PRL 104 011801 Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events with Missing Transverse Energy at CDF II
ABAZOV 2010P
PRL 105 221802 Search for Diphoton Events with Large Missing Transverse Energy in 6.3 fb1 of pp Collisions at s = 1.96 TeV
ABAZOV 2008F
PL B659 856 Search for Supersymmetry in di-photon Final States at s = 1.96 TeV
ABULENCIA 2007H
PRL 98 131804 Search for Anomalous Production of Multilepton Events in pp Collisions at s = 1.96 TeV
ABBIENDI 2006B
EPJ C46 307 Searches for Gauge-Mediated Supersymmetry Breaking Topologies in e+e Collisions at Centre-of-Mass Energies up to s = 209 GeV
ABDALLAH 2005B
EPJ C38 395 Photon Events with Missing Energy in e+e Collisions at s = 130 to 209 GeV