XSec systematics 2015a

2015a is the proposal-era generation of x-section error, based on the Default model of GENIE 2.6 - 2.12. There are 2 versions of 2015a:

• 2015aF: includes the full list of parameters (shown below)
• 2015aP: includes the subset of paramaters used in the SBN proposal (shown in bold below)

Systematic parameters

• genie_qema: CCQE x-section / Axial mass
• genie_qevec: CCQE x-section / Vector mass
• genie_ncelAxial: NCEL x-section / Axial mass
• genie_ncelEta: NCEL x-section / Strange axial form factor
• genie_ccresAxial: CCRES x-section / Axial mass
• genie_ccresVector: CCRES x-section / Vector mass
• genie_ncresAxial: NCRES x-section / Axial mass
• genie_ncresVector: NCRES x-section / Vector mass
• genie_NonResRvp1pi: non-RES bkg x-section / nu+p CC 1-pion normalization
  • note: the same knob is used to vary the nubar-n CC 1-pion normalization
• genie_NonResRvbarp1pi: non-RES bkg x-section / nubar+p CC 1-pion normalization
  • note: the same knob is used to vary the nu-n CC 1-pion normalization
• genie_NonResRvp2pi: non-RES bkg x-section / nu+p CC 2-pion normalization
  • note: the same knob is used to vary the nubar-n CC 2-pion normalization
• genie_NonResRvbarp2pi: non-RES bkg x-section / nubar+p CC 2-pion normalization
  • note: the same knob is used to vary the nu-n CC 2-pion normalization
• genie_NonResRvp1piAlt: as genie_NonResRvp1pi above, but for NC (*)
• genie_NonResRvbarp1piAlt: as genie_NonResRvbarp1pi above, but for NC (*)
• genie_NonResRvp2piAlt: as genie_NonResRvp2pi above, but for NC (*)
• genie_NonResRvbarp2piAlt: as genie_NonResRvbarp2pi above, but for NC (*)
• genie_DISAth: DIS (CC and NC) xsection / Aht (higher twist) param
• genie_DISBth: DIS (CC and NC) xsection / Bht (higher twist) param
• genie_DISCv1u: DIS (CC and NC) xsection / Cv1u valence pdf correction
• genie_DISCv2u: DIS (CC and NC) xsection / Cv2u valence pdf correction
• genie_cohMA: COH (CC and NC) xsection / Axial mass
• genie_cohR0: COH (CC and NC) xsection / Nuclear radius parameter
• genie_NC: Additional error on NC/CC ratio
• genie_FermiGasModelKf: Nucleal model / Fermi momentum k_F
• genie_FermiGasModelSf: ??
• genie_ResDecayGamma: Resonance decays / Branching ratio for 1\gamma
• genie_ResDecayEta: Resonance decays / Branching ratio to \eta
• genie_ResDecayTheta: Resonance decays / angular distribution parameter for 1-pion f/s
• genie_FormZone: Hadronization / formation zone
• genie_AGKYxF: Hadronization / nucleon x_F distribution
• genie_AGKYpT: Hadronization / nucleon p_T distribution
• genie_IntraNukeNmfp: FSI / nucleon mean-free path
• genie_IntraNukeNcex: FSI / nucleon CEx fate fraction
• genie_IntraNukeNel: FSI / nucleon EL fate fraction
• genie_IntraNukeNinel: FSI / nucleon INEL fate fraction
• genie_IntraNukeNabs: FSI / nucleon ABS fate fraction
• genie_IntraNukeNpi: FSI / nucleon PI-PROD fate fraction
• genie_IntraNukePImfp: FSI / pion mean-free path
• genie_IntraNukePIcex: FSI / pion CEx fate fraction
• genie_IntraNukePIel: FSI / pion EL fate fraction
• genie_IntraNukePIinel: FSI / pion INEL fate fraction
• genie_IntraNukePIabs: FSI / pion ABS fate fraction
• genie_IntraNukePIpi: FSI / pion PI-PROD fate fraction

(*) Comment from fcl file: Alternate parameters for non-resonant backgrounds so that we can reweight CC and NC differently

References

• (1) SBN proposal, https://arxiv.org/abs/1503.01520 (I-26)