The reaction keyword Sets the B(F) and B(GT) matrix elements for a - PowerPoint PPT Presentation

reaction FILE The reaction keyword • Sets the B(F) and B(GT) matrix elements for a cross section calculation • The format of this command is • FILE is the name (and full path, if needed) of a file that contains the evaluated matrix elements and a little more information about the reaction – reactant and product PDG codes – labels for whether each matrix element is F or GT – reaction description string 1

The reaction keyword • See ve40ArCC_1998.react for an example of the data format • At least one reaction must be defined in the configuration file • If multiple reaction lines appear, then MARLEY will use all of them • Two reaction datasets are included in this release, both for e on 40 Ar charged-current 𝜉 2

source NU_TYPE STYLE STYLESPEC The source keyword • Sets the incident neutrino spectrum to use in a MARLEY calculation • All spectra that are supplied by the user to MARLEY should not be cross-section weighted. • MARLEY uses its own cross section model to do the appropriate weighting • The format of this command is 3

source NU_TYPE STYLE STYLESPEC The source keyword • NU_TYPE is the kind of neutrino produced by the source – PDG code (e.g., 𝜉 e = 12) – strings: ve, vebar, vu, vubar, vt, vtbar • STYLE is the kind of source to use – mono (monoenergetic) – fd (fermi-dirac) – dar ( 𝜈 decay-at-rest) – bf (“beta-fit” spectrum) – hist (histogram) – grid (interpolation grid) – th1 / tgraph (ROOT TH1 or TGraph from a file) 4

source NU_TYPE STYLE STYLESPEC 𝐷𝐹 2 The source keyword • STYLESPEC contains extra STYLE-dependent parameters for the source Examples • source ve fd Emin Emax T [ 𝜃 ] • Defines a Fermi-Dirac source that is sampled between E min and E max (both MeV). • The temperature T must be specified (MeV), and an optional pinching parameter 𝜃 may be given (default 𝜃 = 0 ) • 𝑄(𝐹) = 𝑈 4 [1 + exp( 𝐹 𝑈 − 𝜃)] 5

The source keyword Examples • source ve dar • Defines a muon decay-at-rest 𝜉 e source • The Michel spectrum doesn’t need any additional parameters • source ve mono E • Defines a monoenergetic source with energy E (MeV) • For the full description of the source keyword, see the first section of the manual 6