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@kjplows kjplows commented Jan 8, 2026

This is a port of PR #7 opened by @afropapp13 with some reorganisation of tunes.

Adding new tunes for SBN using the MINERvA Nature (T. Cai et al, Nature 614 (2023) 48-53) and elementary-target (A. Meyer et al, arXiv: 2512.14097) papers.

These tunes impact the z-expansion axial form factors. There are a few new sets:

  • minerva: arXiv, no sum rules applied, kmax=2
  • minervaFull: arXiv, sum rules applied, kmax=2 (+4 = 6)
  • minervaNature: Nature, sum rules applied, kmax=4 (+4 = 8)
  • lqcd: no sum rules applied, kmax=2
  • lqcdFull: sum rules applied, kmax=2 (+4 = 6)

Calling @afropapp13 , @sungbinoh , and @nathanielerowe to review.

sjgardiner and others added 3 commits October 30, 2025 21:04
Fix spline generation issue involving trace isotopes of elements that use a spectral function nuclear model
@kjplows kjplows self-assigned this Jan 8, 2026
@kjplows kjplows added the enhancement New feature or request label Jan 8, 2026
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kjplows commented Jan 8, 2026

Plots from @sungbinoh showing the impact of these FFs

image image

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💯 from my side!

@kjplows kjplows moved this to Open pull requests in SBN software development Jan 9, 2026
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kjplows commented Jan 9, 2026

40k nucleons sampled based on imposing 8 hour threshold for QEL cross section calculation. (250 knots, E max = 1000 GeV --> about 150 knots sampled below the integral nuclear cutoff configured at 10 GeV)
2k nucleons --> 1547 s
5k nucleons --> 3729 s
10k nucleons --> 6505 s

Fitting those gives a best-fit which intersects ~7 hours at 40k nucleons, adding uncertainty --> 7.5 hours. Close enough.

image

@kjplows kjplows force-pushed the feature/afropapp13-new-sbn2-configurations branch from 5de16f9 to 517816c Compare January 9, 2026 16:17
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