NLO-NNLL higgsino-like N2C1 cross sections

The following cross sections are for higgsino-like chargino-neutralino pair production (sum of χ̃+1χ̃02 and χ̃-1χ̃02, and also for each subprocess individually). They have been calculated for sqrt(s) = 14 TeV at NLO-NNLL using Resummino 2.0.1 from B. Fuks et al. The Monte Carlo PDF set with 100 replicas PDF4LHC15_mc is used, which is a statistical combination of CT14, MMHT14 and NNPDF3.0, all using αs(mZ2) = 0.118. The use of this combination of PDF sets is recommended for searches for new Physics by the PDF4LHC Working Group. See https://arxiv.org/abs/1510.03865 for more details.

The cross sections are computed for degenerate charginos and neutralinos. The mass is denoted as mχ̃. The following sentence describes all the assumptions in the cross section calculations and is suitable to be included in the description of the interpretation of your results:

The production cross sections are computed at NLO plus
next-to-next-to-leading-log (NNLL) precision in a limit of mass-degenerate
higgsino $\chiz_2$, $\chipm_1$, and $\chiz_1$ with all the other sparticles
assumed to be heavy and decoupled.

When using these cross sections, some references have to be cited. They can be found below in bibtex format. The references can also be downloaded from this Twiki, see attachments at the bottom.

Resummino:

@article{Debove:2010kf,
      author         = "Debove, Jonathan and Fuks, Benjamin and Klasen, Michael",
      title          = "{Threshold resummation for gaugino pair production at
                        hadron colliders}",
      journal        = "Nucl. Phys. B",
      volume         = "842",
      year           = "2011",
      pages          = "51-85",
      doi            = "10.1016/j.nuclphysb.2010.08.016",
      eprint         = "1005.2909",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "IPHC-PHENO-10-02, LPSC-10-050",
      SLACcitation   = "%%CITATION = ARXIV:1005.2909;%%"
}
@article{Fuks:2012qx,
      author         = "Fuks, Benjamin and Klasen, Michael and Lamprea, David R.
                        and Rothering, Marcel",
      title          = "{Gaugino production in proton-proton collisions at a
                        center-of-mass energy of 8 TeV}",
      journal        = "JHEP",
      volume         = "10",
      pages          = "081",
      doi            = "10.1007/JHEP10(2012)081",
      year           = "2012",
      eprint         = "1207.2159",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "IPHC-PHENO-12-07, MS-TP-12-05",
      SLACcitation   = "%%CITATION = ARXIV:1207.2159;%%",
}
@article{Fuks:2013vua,
      author         = "Fuks, Benjamin and Klasen, Michael and Lamprea, David R.
                        and Rothering, Marcel",
      title          = "{Precision predictions for electroweak superpartner
                        production at hadron colliders with {\sc Resummino}}",
      journal        = "Eur. Phys. J. C",
      volume         = "73",
      pages          = "2480",
      doi            = "10.1140/epjc/s10052-013-2480-0",
      year           = "2013",
      eprint         = "1304.0790",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "CERN-PH-TH-2013-064, IPHC-PHENO-13-02, MS-TP-13-06",
      SLACcitation   = "%%CITATION = ARXIV:1304.0790;%%",
}
@article{Fiaschi:2018hgm,
      author         = "Fiaschi, Juri and Klasen, Michael",
      title          = "{Neutralino-chargino pair production at NLO+NLL with
                        resummation-improved parton density functions for LHC Run
                        II}",
      journal        = "Phys. Rev. D",
      volume         = "98",
      year           = "2018",
      number         = "5",
      pages          = "055014",
      doi            = "10.1103/PhysRevD.98.055014",
      eprint         = "1805.11322",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "MS-TP-18-19",
      SLACcitation   = "%%CITATION = ARXIV:1805.11322;%%"
}

LHAPDF:

@article{Buckley:2014ana,
      author         = "Buckley, Andy and Ferrando, James and Lloyd, Stephen and
                        Nordström, Karl and Page, Ben and Rüfenacht, Martin and
                        Schönherr, Marek and Watt, Graeme",
      title          = "{LHAPDF6: parton density access in the LHC precision
                        era}",
      journal        = "Eur. Phys. J.",
      volume         = "C75",
      year           = "2015",
      pages          = "132",
      doi            = "10.1140/epjc/s10052-015-3318-8",
      eprint         = "1412.7420",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "GLAS-PPE-2014-05, MCNET-14-29, IPPP-14-111, DCPT-14-222",
      SLACcitation   = "%%CITATION = ARXIV:1412.7420;%%"
}

PDF4LHC:

@article{Butterworth:2015oua,
      author         = "Butterworth, Jon and others",
      title          = "{PDF4LHC recommendations for LHC Run II}",
      journal        = "J. Phys.",
      volume         = "G43",
      year           = "2016",
      pages          = "023001",
      doi            = "10.1088/0954-3899/43/2/023001",
      eprint         = "1510.03865",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "OUTP-15-17P, SMU-HEP-15-12, TIF-UNIMI-2015-14,
                        LCTS-2015-27, CERN-PH-TH-2015-249",
      SLACcitation   = "%%CITATION = ARXIV:1510.03865;%%"
}
@article{Carrazza:2015hva,
      author         = "Carrazza, Stefano and Latorre, José I. and Rojo, Juan
                        and Watt, Graeme",
      title          = "{A compression algorithm for the combination of PDF
                        sets}",
      journal        = "Eur. Phys. J.",
      volume         = "C75",
      year           = "2015",
      pages          = "474",
      doi            = "10.1140/epjc/s10052-015-3703-3",
      eprint         = "1504.06469",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "TIF-UNIMI-2015-2, OUTP-15-01P, IPPP-15-22, DCPT-15-44",
      SLACcitation   = "%%CITATION = ARXIV:1504.06469;%%"
}
@article{Watt:2012tq,
      author         = "Watt, G. and Thorne, R. S.",
      title          = "{Study of Monte Carlo approach to experimental
                        uncertainty propagation with MSTW 2008 PDFs}",
      journal        = "JHEP",
      volume         = "08",
      year           = "2012",
      pages          = "052",
      doi            = "10.1007/JHEP08(2012)052",
      eprint         = "1205.4024",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "CERN-PH-TH-2012-132, LCTS-2012-11",
      SLACcitation   = "%%CITATION = ARXIV:1205.4024;%%"
}

CT14:

@article{Dulat:2015mca,
      author         = "Dulat, Sayipjamal and Hou, Tie-Jiun and Gao, Jun and
                        Guzzi, Marco and Huston, Joey and Nadolsky, Pavel and
                        Pumplin, Jon and Schmidt, Carl and Stump, Daniel and Yuan,
                        C. P.",
      title          = "{New parton distribution functions from a global analysis
                        of quantum chromodynamics}",
      journal        = "Phys. Rev.",
      volume         = "D93",
      year           = "2016",
      number         = "3",
      pages          = "033006",
      doi            = "10.1103/PhysRevD.93.033006",
      eprint         = "1506.07443",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      SLACcitation   = "%%CITATION = ARXIV:1506.07443;%%"
}

MMHT14:

@article{Harland-Lang:2014zoa,
      author         = "Harland-Lang, L. A. and Martin, A. D. and Motylinski, P.
                        and Thorne, R. S.",
      title          = "{Parton distributions in the LHC era: MMHT 2014 PDFs}",
      journal        = "Eur. Phys. J.",
      volume         = "C75",
      year           = "2015",
      number         = "5",
      pages          = "204",
      doi            = "10.1140/epjc/s10052-015-3397-6",
      eprint         = "1412.3989",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "LCTS-2014-47, IPPP-14-97, DCPT-14-194",
      SLACcitation   = "%%CITATION = ARXIV:1412.3989;%%"
}

NNPDF:

@article{Ball:2014uwa,
      author         = "Ball, Richard D. and others",
      title          = "{Parton distributions for the LHC Run II}",
      collaboration  = "NNPDF",
      journal        = "JHEP",
      volume         = "04",
      year           = "2015",
      pages          = "040",
      doi            = "10.1007/JHEP04(2015)040",
      eprint         = "1410.8849",
      archivePrefix  = "arXiv",
      primaryClass   = "hep-ph",
      reportNumber   = "EDINBURGH-2014-15, IFUM-1034-FT, CERN-PH-TH-2013-253,
                        OUTP-14-11P, CAVENDISH-HEP-14-11",
      SLACcitation   = "%%CITATION = ARXIV:1410.8849;%%"
}

To calculate these cross sections, this repository can be used. The SLHA files can be found there as well: wino.in and hino.in.

Should cross section information be needed for a mass that is not tabulated below, one can obtain it by using the ROOT macros provided under:

/afs/cern.ch/user/a/amete/public/EWKGauginoCrossSections_13TeV

For this specific grid one needs to do:

root -l 'get_gaugino.C("C1N2", "hino", mass)' 

where mass is the mass of the sparticle in GeV. The result of the interpolation can be seen here.

NLO+NNLL Higgsino cross sections for combined χ̃02χ̃+1 and χ̃02χ̃-1 production at sqrt(s) = 14 TeV

mχ̃ [GeV] σ [fb] uncertainty [fb]
50 123949 176.75
75 18175.9 22.116
100 6137.6 7.017
125 2745.4 3.029
150 1431.44 1.5235
175 823.65 0.8587
200 507.98 0.5184
225 329.99 0.3327
250 223.172 0.2214
275 155.86 0.15394
300 111.814 0.1075
325 81.982 0.07753
350 61.243 0.05704
375 46.477 0.0414
400 35.77 0.031506
425 27.8662 0.024294
450 21.9419 0.018938
475 17.4442 0.01506
500 13.985 0.012031
525 11.2976 0.009641
550 9.1891 0.007782
575 7.5192 0.006317
600 6.1909 0.00517
625 5.1225 0.004199
650 4.2583 0.0034713
675 3.55353 0.0028791
700 2.97875 0.0024021
725 2.50606 0.0020115
750 2.11512 0.0016896
775 1.79408 0.0014322
800 1.5213 0.0012095
825 1.29852 0.0010362
850 1.10966 0.0008924
875 0.94925 0.0007533
900 0.81433 0.0006483
925 0.7001 0.0005565
950 0.60303 0.0004789
975 0.52028 0.00041249
1000 0.44956 0.00035626
1025 0.38915 0.0003096
1050 0.337397 0.00026839
1075 0.292933 0.0002334
1100 0.254685 0.00020348
1125 0.22175 0.00017814
1150 0.193362 0.00015669
1175 0.168739 0.0001384
1200 0.147429 0.00012249
1225 0.128955 0.00010971
1250 0.112895 9.823e-05
1275 0.09893 8.887e-05
1300 0.086796 8.164e-05
1325 0.076254 7.642e-05
1350 0.067058 7.345e-05
1375 0.059036 7.222e-05
1400 0.050724 4.1018e-05
1425 0.044578 3.6277e-05
1450 0.0391961 3.1754e-05
1475 0.034502 3.075e-05
1500 0.0303726 2.8009e-05
1525 0.0267509 2.5494e-05
1550 0.0235853 1.8552e-05
1575 0.0207816 1.6362e-05
1600 0.018299 1.7963e-05
1625 0.016134 1.6101e-05
1650 0.0145733 5.716e-05
1675 0.0125481 1.2899e-05
1700 0.0110814 8.954e-06
1725 0.0100357 5.517e-05
1750 0.0086295 7.003e-06
1775 0.0075817 6.742e-06
1800 0.0068948 1.6608e-05
1825 0.0059928 1.2089e-05
1850 0.0052246 4.4405e-06
1875 0.0046149 3.918e-06
1900 0.00407481 3.4757e-06
1925 0.00360651 3.007e-06
1950 0.00318576 4.369e-06
1975 0.00281161 2.3619e-06
2000 0.00248199 2.0962e-06

NLO+NNLL Higgsino cross sections for χ̃02χ̃+1 production at sqrt(s) = 14 TeV

mχ̃ [GeV] σ [fb] uncertainty [fb]
50 72309 104.9
75 10868 13.57
100 3738.7 4.398
125 1698.5 1.939
150 897.77 0.9876
175 522.95 0.5651
200 326.12 0.3427
225 214.02 0.2231
250 146.11 0.1488
275 102.93 0.105
300 74.457 0.07289
325 55.014 0.05295
350 41.397 0.03921
375 31.633 0.02874
400 24.505 0.022
425 19.209 0.01706
450 15.214 0.01337
475 12.164 0.01073
500 9.8039 0.008567
525 7.9606 0.006899
550 6.5066 0.005594
575 5.3487 0.004563
600 4.4239 0.00375
625 3.6761 0.003063
650 3.0684 0.002543
675 2.5701 0.002118
700 2.1624 0.001774
725 1.8257 0.001491
750 1.546 0.001257
775 1.3164 0.00107
800 1.119 0.000907
825 0.9588 0.0007797
850 0.82194 0.0006731
875 0.70485 0.0005708
900 0.60624 0.0004928
925 0.5225 0.0004245
950 0.45113 0.0003665
975 0.39008 0.0003167
1000 0.33775 0.0002738
1025 0.29295 0.000239
1050 0.25448 0.0002078
1075 0.22135 0.0001813
1100 0.19279 0.0001586
1125 0.16815 0.0001394
1150 0.14688 0.0001232
1175 0.12837 0.0001091
1200 0.11233 9.708e-05
1225 0.0984 8.763e-05
1250 0.086266 7.902e-05
1275 0.075696 7.212e-05
1300 0.066506 6.701e-05
1325 0.058517 6.359e-05
1350 0.051536 6.216e-05
1375 0.045438 6.223e-05
1400 0.038783 3.241e-05
1425 0.034093 2.86e-05
1450 0.029987 2.51e-05
1475 0.026393 2.382e-05
1500 0.023236 2.149e-05
1525 0.020465 1.933e-05
1550 0.018065 1.476e-05
1575 0.015917 1.303e-05
1600 0.013988 1.325e-05
1625 0.012326 1.17e-05
1650 0.01098 1.692e-05
1675 0.0095763 9.328e-06
1700 0.0084744 7.152e-06
1725 0.0075717 1.495e-05
1750 0.0065912 5.599e-06
1775 0.0057885 5.25e-06
1800 0.0052662 1.055e-05
1825 0.0045767 7.857e-06
1850 0.0039759 3.531e-06
1875 0.0035078 3.12e-06
1900 0.0030934 2.766e-06
1925 0.0027351 2.407e-06
1950 0.0023928 2.306e-06
1975 0.0021256 1.892e-06
2000 0.0018733 1.679e-06

NLO+NNLL Higgsino cross sections for χ̃02χ̃-1 production at sqrt(s) = 14 TeV

mχ̃ [GeV] σ [fb] uncertainty [fb]
50 51640 71.85
75 7307.9 8.546
100 2398.9 2.619
125 1046.9 1.09
150 533.67 0.5359
175 300.7 0.2936
200 181.86 0.1757
225 115.97 0.1096
250 77.062 0.0726
275 52.93 0.04894
300 37.357 0.03461
325 26.968 0.02458
350 19.846 0.01783
375 14.844 0.01266
400 11.265 0.009506
425 8.6572 0.007234
450 6.7279 0.005568
475 5.2802 0.00433
500 4.1811 0.003464
525 3.337 0.002742
550 2.6825 0.002188
575 2.1705 0.001754
600 1.767 0.00142
625 1.4464 0.001136
650 1.1899 0.0009283
675 0.98343 0.0007611
700 0.81635 0.0006281
725 0.68036 0.0005205
750 0.56912 0.0004326
775 0.47768 0.0003622
800 0.4023 0.0003025
825 0.33972 0.0002565
850 0.28772 0.0002193
875 0.2444 0.0001825
900 0.20809 0.0001555
925 0.1776 0.000132
950 0.1519 0.0001124
975 0.1302 9.579e-05
1000 0.11181 8.246e-05
1025 0.0962 7.06e-05
1050 0.082917 6.059e-05
1075 0.071583 5.21e-05
1100 0.061895 4.488e-05
1125 0.0536 3.874e-05
1150 0.046482 3.349e-05
1175 0.040369 2.93e-05
1200 0.035099 2.541e-05
1225 0.030555 2.208e-05
1250 0.026629 1.921e-05
1275 0.023234 1.675e-05
1300 0.02029 1.463e-05
1325 0.017737 1.283e-05
1350 0.015522 1.129e-05
1375 0.013598 9.99e-06
1400 0.011941 8.608e-06
1425 0.010485 7.677e-06
1450 0.0092091 6.654e-06
1475 0.008109 6.93e-06
1500 0.0071366 6.519e-06
1525 0.0062859 6.164e-06
1550 0.0055203 3.792e-06
1575 0.0048646 3.332e-06
1600 0.004311 4.713e-06
1625 0.003808 4.401e-06
1650 0.0035933 4.024e-05
1675 0.0029718 3.571e-06
1700 0.002607 1.802e-06
1725 0.002464 4.022e-05
1750 0.0020383 1.404e-06
1775 0.0017932 1.492e-06
1800 0.0016286 6.058e-06
1825 0.0014161 4.232e-06
1850 0.0012487 9.095e-07
1875 0.0011071 7.98e-07
1900 0.00098141 7.097e-07
1925 0.00087141 6e-07
1950 0.00079296 2.063e-06
1975 0.00068601 4.699e-07
2000 0.00060869 4.172e-07

-- BasilSchneider - 2018-11-14

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