cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17182/hepdata.61706.v1/t16
title: "Table 16" of "Production of J/psi and Upsilon mesons in pp collisions at sqrt(s) = 8 TeV"

description: Ratios of the cross-sections for UPSILON(2S)-&gt;MU+MU- and UPSILON(3S)-&gt;MU+MU- with respect toe UPSILON(1S)-&gt;MU+MU- as a function of PT in the rapidity range 2.0-4.0 ;.
description: CERN-LHC. Measurements of the cross sections for J/PSI and UPSILON meson production via their dimuon decay modes in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data used, taken in April 2012 has an integrated luminosity of 51 pb-1 for the UPSILON analysis and 18 pb-1 for the J/PSI analysis. The data cover the rapidity range 2.0-4.5 and transverse momentum range 0-14(15) GeV/c for the J/PSI(UPSILON) production. Where applicable in the tables the first (sys) error is the uncorrelated systematic error and the second is the correlated systematic error.
DOI: 10.17182/hepdata.61706.v1/t17
title: "Table 17" of "Production of J/psi and Upsilon mesons in pp collisions at sqrt(s) = 8 TeV"

description: Ratios of the cross-sections for UPSILON(2S)-&gt;MU+MU- and UPSILON(3S)-&gt;MU+MU- with respect to UPSILON(1S)-&gt;MU+MU- as a function of rapidity in the rapidity range 2.0-4.0 ;.
description: CERN-LHC. Measurements of the cross sections for J/PSI and UPSILON meson production via their dimuon decay modes in proton-proton collisions at a centre-of-mass energy of 8 TeV. The data used, taken in April 2012 has an integrated luminosity of 51 pb-1 for the UPSILON analysis and 18 pb-1 for the J/PSI analysis. The data cover the rapidity range 2.0-4.5 and transverse momentum range 0-14(15) GeV/c for the J/PSI(UPSILON) production. Where applicable in the tables the first (sys) error is the uncorrelated systematic error and the second is the correlated systematic error.
DOI: 10.17182/hepdata.61707.v1/t1
title: "Table 1" of "A measurement of the ratio of the W and Z cross sections with exactly one associated jet in pp collisions at sqrt(s) = 7 TeV with ATLAS"

description: The ratio of W to Z production corrected to full phase space for the two channels combined.
description: CERN-LHC. Measurement of the ratio of the production cross sections of W and Z bosons having exactly one associated jet as a function of the jet transverse momentum threshold. The data sample used has an integrated luminosity of 33 pb-1. Data are shown for the individual decay channels of the bosons in their respective fiducial regions as well as combined and corrected to full phase space. 
 Note that the data are given as a function of the jet tranverse momentum threshold in open-ended inclusive bins, i.e. the first bin contains all events with jets &gt; 30GeV (and so includes the data that went into the measurement in the 40 GeV bin, etc.).
DOI: 10.17182/hepdata.61707.v1/t2
title: "Table 2" of "A measurement of the ratio of the W and Z cross sections with exactly one associated jet in pp collisions at sqrt(s) = 7 TeV with ATLAS"

description: The ratios of W to Z production in the fiducial region for the individual lepton channels and for the channels combined.
description: CERN-LHC. Measurement of the ratio of the production cross sections of W and Z bosons having exactly one associated jet as a function of the jet transverse momentum threshold. The data sample used has an integrated luminosity of 33 pb-1. Data are shown for the individual decay channels of the bosons in their respective fiducial regions as well as combined and corrected to full phase space. 
 Note that the data are given as a function of the jet tranverse momentum threshold in open-ended inclusive bins, i.e. the first bin contains all events with jets &gt; 30GeV (and so includes the data that went into the measurement in the 40 GeV bin, etc.).
DOI: 10.17182/hepdata.61727.v1/t1
title: "Table 1" of "Measurement of the differential photon+ c-jet cross section and the ratio of differential photon+ c and photon+ b cross sections in proton-antiproton collisions at sqrt(s) = 1.96 TeV"

description: The differential cross section as a function of PT for the production of GAMMA+ Charmed JET in PBAR P collisions at a centre of mass energy of 1.96 TeV.
description: Fermilab-Tevatron. Measurements of the differential cross section with respect to photon PT for the associated production of a c-quark jet and an isolated photon with |rapidity| &lt; 1.0 and 30 &lt; PT &lt; 300 GeV in proton-antiproton collisions at a centre-of-mass energy of 1.96 TeV. The results are based on a data sample of integrated luminosity of 8.7 fb-1.
DOI: 10.17182/hepdata.61727.v1/t2
title: "Table 2" of "Measurement of the differential photon+ c-jet cross section and the ratio of differential photon+ c and photon+ b cross sections in proton-antiproton collisions at sqrt(s) = 1.96 TeV"

description: The ratio of the (GAMMA+ CJET) to (GAMMA+ BJET) cross section in bins of the GAMMA PT.
description: Fermilab-Tevatron. Measurements of the differential cross section with respect to photon PT for the associated production of a c-quark jet and an isolated photon with |rapidity| &lt; 1.0 and 30 &lt; PT &lt; 300 GeV in proton-antiproton collisions at a centre-of-mass energy of 1.96 TeV. The results are based on a data sample of integrated luminosity of 8.7 fb-1.
DOI: 10.17182/hepdata.61728.v1/t1
title: "Table 1" of "Measurement of the ratio of three-jet to two-jet cross sections in pp-bar collisions at sqrt(s) = 1.96 TeV"

description: The measured ratio of 3 to 2 jets as a function of the maximum jet PT for a minimum jet PT of 30 GeV.
description: Fermilab-Tevatron. Measurement of the ratios of multijet (3/2) cross sections produced in proton-antiproton interactions at a centre of mass energy of 1.96 TeV. The data sample used has an integrated luminosity of 0.7 fb-1 with the results being presented as a function of different maximum and minumum jet transverse momentum requirements.
DOI: 10.17182/hepdata.61728.v1/t2
title: "Table 2" of "Measurement of the ratio of three-jet to two-jet cross sections in pp-bar collisions at sqrt(s) = 1.96 TeV"

description: The measured ratio of 3 to 2 jets as a function of the maximum jet PT for a minimum jet PT of 50 GeV.
description: Fermilab-Tevatron. Measurement of the ratios of multijet (3/2) cross sections produced in proton-antiproton interactions at a centre of mass energy of 1.96 TeV. The data sample used has an integrated luminosity of 0.7 fb-1 with the results being presented as a function of different maximum and minumum jet transverse momentum requirements.
DOI: 10.17182/hepdata.61728.v1/t3
title: "Table 3" of "Measurement of the ratio of three-jet to two-jet cross sections in pp-bar collisions at sqrt(s) = 1.96 TeV"

description: The measured ratio of 3 to 2 jets as a function of the maximum jet PT for a minimum jet PT of 70 GeV.
description: Fermilab-Tevatron. Measurement of the ratios of multijet (3/2) cross sections produced in proton-antiproton interactions at a centre of mass energy of 1.96 TeV. The data sample used has an integrated luminosity of 0.7 fb-1 with the results being presented as a function of different maximum and minumum jet transverse momentum requirements.
DOI: 10.17182/hepdata.61728.v1/t4
title: "Table 4" of "Measurement of the ratio of three-jet to two-jet cross sections in pp-bar collisions at sqrt(s) = 1.96 TeV"

description: The measured ratio of 3 to 2 jets as a function of the maximum jet PT for a minimum jet PT of 90 GeV.
description: Fermilab-Tevatron. Measurement of the ratios of multijet (3/2) cross sections produced in proton-antiproton interactions at a centre of mass energy of 1.96 TeV. The data sample used has an integrated luminosity of 0.7 fb-1 with the results being presented as a function of different maximum and minumum jet transverse momentum requirements.
DOI: 10.17182/hepdata.61735.v1/t1
title: "Table 1" of "Measurement of the Cross Section for Direct-Photon Production in Association with a Heavy Quark in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV"

description: The cross section for GAMMA BQUARK X production as a function of the transverse energy of the GAMMA.
description: Fermilab-Tevatron. Measurement of the cross section for direct photon production in association with a heavy quark (B or C) in proton-antiproton collisions at a centre of mass energy of 1.96 TeV. The measurement uses the full data set with integrated luminosity of 9.1 fb-1.
DOI: 10.17182/hepdata.61735.v1/t2
title: "Table 2" of "Measurement of the Cross Section for Direct-Photon Production in Association with a Heavy Quark in $p\bar{p}$ Collisions at $\sqrt{s}$ = 1.96 TeV"

description: The cross section for GAMMA CQUARK X production as a function of the transverse energy of the GAMMA.
description: Fermilab-Tevatron. Measurement of the cross section for direct photon production in association with a heavy quark (B or C) in proton-antiproton collisions at a centre of mass energy of 1.96 TeV. The measurement uses the full data set with integrated luminosity of 9.1 fb-1.
DOI: 10.17182/hepdata.61738.v1/t1
title: "Table 1" of "Measurement of W^+W^- production in pp collisions at sqrt{s}=7 TeV with the ATLAS detector and limits on anomalous WWZ and WWgamma couplings"

description: The measured fiducial cross section in the three channels . 
The first systematic (sys) error is the combined systematic uncertainty excluding that of the luminosity. 
The second (sys) error is the uncertainty on the luminosity.
description: CERN-LHC. Measurements of the cross section for W+W- production in proton proton collisions at a centre-of mass energy of 7 TeV. The data sample used, collected during 2011, has a total integrated luminosity of 4.6 fb-1 with 1325 candidate events in the double leptonic decay final state with electrons, muons and missing transverse momentum. The total cross section is presented together with fiducial cross sections in a phase space region, defined for each decay channel. This fiducual region is defined as: 

Common Cuts for all fiducial regions: 
- No Generator Jets with PT &gt; 25 GeV in |Y|&lt;4.5 and |Delta R(jet,electron)|&gt;0.3 (Generator-level jets defined by Anti-$k_t$ algorithm with $R=0.4$) 
- Lepton kinematics account for photon contributions within $Delta R=0.1$ 
- PT of electrons and muons &gt; 20 GeV 
- PT of leading lepton &gt; 25 GeV 
- ETA of electrons: |eta|&lt;1.37 OR 1.52&lt;|eta|&lt;2.47 
- ETA of muons: |eta|&lt;2.4 
- PT of DiLepton System &gt; 30 GeV 
- PT_Rel defined via the transverse vector sum of both Neutrinos according to EQN 3 (P 5) 

Specific Cuts for ee decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for mumu decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for emu decay channel 
- dilepton mass &gt; 10 GeV 
- PT_Rel &gt; 25 GeV 

Note added (25 JUN 2014):
The cross section values reported in Tables 1,2,3 below should be multiplied by a factor of 1.0141 to take into account the updated value of the integrated luminosity for the ATLAS 2011 data taking period. The uncertainty on the global normalisation ("Lumi") remains at 1.8%. See Eur.Phys.J. C73 (2013) 2518 for more details.
DOI: 10.17182/hepdata.61738.v1/t2
title: "Table 2" of "Measurement of W^+W^- production in pp collisions at sqrt{s}=7 TeV with the ATLAS detector and limits on anomalous WWZ and WWgamma couplings"

description: The measured total cross section in the three channels. 
The first systematic (sys) error is the combined systematic uncertainty excluding that of the luminosity. 
The second (sys) error is the uncertainty on the luminosity.
description: CERN-LHC. Measurements of the cross section for W+W- production in proton proton collisions at a centre-of mass energy of 7 TeV. The data sample used, collected during 2011, has a total integrated luminosity of 4.6 fb-1 with 1325 candidate events in the double leptonic decay final state with electrons, muons and missing transverse momentum. The total cross section is presented together with fiducial cross sections in a phase space region, defined for each decay channel. This fiducual region is defined as: 

Common Cuts for all fiducial regions: 
- No Generator Jets with PT &gt; 25 GeV in |Y|&lt;4.5 and |Delta R(jet,electron)|&gt;0.3 (Generator-level jets defined by Anti-$k_t$ algorithm with $R=0.4$) 
- Lepton kinematics account for photon contributions within $Delta R=0.1$ 
- PT of electrons and muons &gt; 20 GeV 
- PT of leading lepton &gt; 25 GeV 
- ETA of electrons: |eta|&lt;1.37 OR 1.52&lt;|eta|&lt;2.47 
- ETA of muons: |eta|&lt;2.4 
- PT of DiLepton System &gt; 30 GeV 
- PT_Rel defined via the transverse vector sum of both Neutrinos according to EQN 3 (P 5) 

Specific Cuts for ee decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for mumu decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for emu decay channel 
- dilepton mass &gt; 10 GeV 
- PT_Rel &gt; 25 GeV 

Note added (25 JUN 2014):
The cross section values reported in Tables 1,2,3 below should be multiplied by a factor of 1.0141 to take into account the updated value of the integrated luminosity for the ATLAS 2011 data taking period. The uncertainty on the global normalisation ("Lumi") remains at 1.8%. See Eur.Phys.J. C73 (2013) 2518 for more details.
DOI: 10.17182/hepdata.61738.v1/t3
title: "Table 3" of "Measurement of W^+W^- production in pp collisions at sqrt{s}=7 TeV with the ATLAS detector and limits on anomalous WWZ and WWgamma couplings"

description: The measured total cross section (combined). 
The first systematic (sys) error is the combined systematic uncertainty excluding that of the luminosity. 
The second (sys) error is the uncertainty on the luminosity.
description: CERN-LHC. Measurements of the cross section for W+W- production in proton proton collisions at a centre-of mass energy of 7 TeV. The data sample used, collected during 2011, has a total integrated luminosity of 4.6 fb-1 with 1325 candidate events in the double leptonic decay final state with electrons, muons and missing transverse momentum. The total cross section is presented together with fiducial cross sections in a phase space region, defined for each decay channel. This fiducual region is defined as: 

Common Cuts for all fiducial regions: 
- No Generator Jets with PT &gt; 25 GeV in |Y|&lt;4.5 and |Delta R(jet,electron)|&gt;0.3 (Generator-level jets defined by Anti-$k_t$ algorithm with $R=0.4$) 
- Lepton kinematics account for photon contributions within $Delta R=0.1$ 
- PT of electrons and muons &gt; 20 GeV 
- PT of leading lepton &gt; 25 GeV 
- ETA of electrons: |eta|&lt;1.37 OR 1.52&lt;|eta|&lt;2.47 
- ETA of muons: |eta|&lt;2.4 
- PT of DiLepton System &gt; 30 GeV 
- PT_Rel defined via the transverse vector sum of both Neutrinos according to EQN 3 (P 5) 

Specific Cuts for ee decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for mumu decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for emu decay channel 
- dilepton mass &gt; 10 GeV 
- PT_Rel &gt; 25 GeV 

Note added (25 JUN 2014):
The cross section values reported in Tables 1,2,3 below should be multiplied by a factor of 1.0141 to take into account the updated value of the integrated luminosity for the ATLAS 2011 data taking period. The uncertainty on the global normalisation ("Lumi") remains at 1.8%. See Eur.Phys.J. C73 (2013) 2518 for more details.
DOI: 10.17182/hepdata.61738.v1/t4
title: "Table 4" of "Measurement of W^+W^- production in pp collisions at sqrt{s}=7 TeV with the ATLAS detector and limits on anomalous WWZ and WWgamma couplings"

description: Normalised fiducial cross section in bins of the leading lepton PT. Leading Lepton is the lepton in the final state with highest PT.
description: CERN-LHC. Measurements of the cross section for W+W- production in proton proton collisions at a centre-of mass energy of 7 TeV. The data sample used, collected during 2011, has a total integrated luminosity of 4.6 fb-1 with 1325 candidate events in the double leptonic decay final state with electrons, muons and missing transverse momentum. The total cross section is presented together with fiducial cross sections in a phase space region, defined for each decay channel. This fiducual region is defined as: 

Common Cuts for all fiducial regions: 
- No Generator Jets with PT &gt; 25 GeV in |Y|&lt;4.5 and |Delta R(jet,electron)|&gt;0.3 (Generator-level jets defined by Anti-$k_t$ algorithm with $R=0.4$) 
- Lepton kinematics account for photon contributions within $Delta R=0.1$ 
- PT of electrons and muons &gt; 20 GeV 
- PT of leading lepton &gt; 25 GeV 
- ETA of electrons: |eta|&lt;1.37 OR 1.52&lt;|eta|&lt;2.47 
- ETA of muons: |eta|&lt;2.4 
- PT of DiLepton System &gt; 30 GeV 
- PT_Rel defined via the transverse vector sum of both Neutrinos according to EQN 3 (P 5) 

Specific Cuts for ee decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for mumu decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for emu decay channel 
- dilepton mass &gt; 10 GeV 
- PT_Rel &gt; 25 GeV 

Note added (25 JUN 2014):
The cross section values reported in Tables 1,2,3 below should be multiplied by a factor of 1.0141 to take into account the updated value of the integrated luminosity for the ATLAS 2011 data taking period. The uncertainty on the global normalisation ("Lumi") remains at 1.8%. See Eur.Phys.J. C73 (2013) 2518 for more details.
DOI: 10.17182/hepdata.61738.v1/t5
title: "Table 5" of "Measurement of W^+W^- production in pp collisions at sqrt{s}=7 TeV with the ATLAS detector and limits on anomalous WWZ and WWgamma couplings"

description: Correlations in the leading Lepton PT distribution.
description: CERN-LHC. Measurements of the cross section for W+W- production in proton proton collisions at a centre-of mass energy of 7 TeV. The data sample used, collected during 2011, has a total integrated luminosity of 4.6 fb-1 with 1325 candidate events in the double leptonic decay final state with electrons, muons and missing transverse momentum. The total cross section is presented together with fiducial cross sections in a phase space region, defined for each decay channel. This fiducual region is defined as: 

Common Cuts for all fiducial regions: 
- No Generator Jets with PT &gt; 25 GeV in |Y|&lt;4.5 and |Delta R(jet,electron)|&gt;0.3 (Generator-level jets defined by Anti-$k_t$ algorithm with $R=0.4$) 
- Lepton kinematics account for photon contributions within $Delta R=0.1$ 
- PT of electrons and muons &gt; 20 GeV 
- PT of leading lepton &gt; 25 GeV 
- ETA of electrons: |eta|&lt;1.37 OR 1.52&lt;|eta|&lt;2.47 
- ETA of muons: |eta|&lt;2.4 
- PT of DiLepton System &gt; 30 GeV 
- PT_Rel defined via the transverse vector sum of both Neutrinos according to EQN 3 (P 5) 

Specific Cuts for ee decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for mumu decay channel 
- dilepton mass &gt; 15 GeV 
- |dilepton mass - Z0 mass| &gt; 15 GeV 
- PT_Rel &gt; 45 GeV 

Specific Cuts for emu decay channel 
- dilepton mass &gt; 10 GeV 
- PT_Rel &gt; 25 GeV 

Note added (25 JUN 2014):
The cross section values reported in Tables 1,2,3 below should be multiplied by a factor of 1.0141 to take into account the updated value of the integrated luminosity for the ATLAS 2011 data taking period. The uncertainty on the global normalisation ("Lumi") remains at 1.8%. See Eur.Phys.J. C73 (2013) 2518 for more details.
DOI: 10.17182/hepdata.61739.v1/t1
title: "Table 1" of "Measurement of the photon$+b$-jet production differential cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96~\TeV$"

description: The differential cross section as a function of PT for the production of GAMMA + B-JET in the photon |rapidity/ region &lt; 1.0.
description: Fermilab Tevatron. Measurements of the differential cross section as a function of transverse momentum for the production of a photon in association with a b-quark jet produced in proton-antiproton interactions with centre of mass energy of 1.96 TeV. The data sample used has an integrated luminosityof 8.7 fb-1 with the cross sections having photon !rapidity!&lt;1.0 and transverse momentum in the range 30-300 GeV.
DOI: 10.17182/hepdata.61739.v1/t2
title: "Table 2" of "Measurement of the photon$+b$-jet production differential cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96~\TeV$"

description: The differential cross section as a function of PT for the production of GAMMA + B-JET in the photon |rapidity| region 1.5-2.5.
description: Fermilab Tevatron. Measurements of the differential cross section as a function of transverse momentum for the production of a photon in association with a b-quark jet produced in proton-antiproton interactions with centre of mass energy of 1.96 TeV. The data sample used has an integrated luminosityof 8.7 fb-1 with the cross sections having photon !rapidity!&lt;1.0 and transverse momentum in the range 30-300 GeV.
DOI: 10.17182/hepdata.61747.v1/t1
title: "Table 1" of "Search for new phenomena in final states with large jet multiplicities and missing transverse momentum at $\sqrt{s}$=8 TeV proton-proton collisions using the ATLAS experiment"

description: MET/sqrt(HT) distributions for the multi-jet + flavour stream with PTmin=50 GeV, and exactly eight jets, with the signal region selection, other than that on MET/sqrt(HT) itself. A selection of zero b-jets is applied.
description: CERN-LHC. Results are presented of a search that looks for new particles decaying to large numbers (7 to greater or equal to 10) of jets, missing transverse momentum and no isolated electrons or muons. This analysis uses 20.3/fb of pp collision data at sqrt(s)=8 TeV collected by the ATLAS experiment at the Large Hadron Collider. The sensitivity of the search is enhanced by considering the number of b-tagged jets and the scalar sum of masses of large-radius jets in an event. No evidence is found for physics beyond the Standard Model. The results are interpreted in the context of various simplified supersymmetry-inspired models where gluinos are pair produced, as well as a mSUGRA/CMSSM model. 

In this HEPDATA record, detailed results are presented for two simplified models, denoted in the paper as - Gluino-stop (off-shell) - and - Gluino-squark (via neutralino) for fixed x=1/2.
DOI: 10.17182/hepdata.61747.v1/t2
title: "Table 2" of "Search for new phenomena in final states with large jet multiplicities and missing transverse momentum at $\sqrt{s}$=8 TeV proton-proton collisions using the ATLAS experiment"

description: MET/sqrt(HT) distributions for the multi-jet + flavour stream with PTmin=50 GeV, and exactly nine jets, with the signal region selection, other than that on MET/sqrt(HT) itself. A selection of zero b-jets is applied.
description: CERN-LHC. Results are presented of a search that looks for new particles decaying to large numbers (7 to greater or equal to 10) of jets, missing transverse momentum and no isolated electrons or muons. This analysis uses 20.3/fb of pp collision data at sqrt(s)=8 TeV collected by the ATLAS experiment at the Large Hadron Collider. The sensitivity of the search is enhanced by considering the number of b-tagged jets and the scalar sum of masses of large-radius jets in an event. No evidence is found for physics beyond the Standard Model. The results are interpreted in the context of various simplified supersymmetry-inspired models where gluinos are pair produced, as well as a mSUGRA/CMSSM model. 

In this HEPDATA record, detailed results are presented for two simplified models, denoted in the paper as - Gluino-stop (off-shell) - and - Gluino-squark (via neutralino) for fixed x=1/2.