Production of ?0 mesons and charged hadrons in $$\bar v$$ neon and ? neon charged current interactions

Hadronization Model Tuning in GENIE v3

“…This behaviour has also been proved to be true for heavier nuclear targets [42,43]. From fits to π 0 production data, it is known that n ch ∼ 0.5 n π 0 [44]. Therefore, the total hadronic multiplicity is obtained from the the charged one as…”

PYTHIA hadronization process tuning in the GENIE neutrino interaction generator

“…Thus, if we increase the charged hadron multiplicity, the model will also have higher multiplicities of neutral pions. The charged pion and neutral pion multiplicity ratio is 2:1 in BEBC neon target bubble chamber data [41], however, this relationship is not obvious in other bubble chamber data. As we see from figures 3 and 6, it is not easy to achieve good agreements with both charged hadron and neutral pion multiplicities by tuning PYTHIA parameters.…”

“…6, predictions are compared with the averaged π • multiplicity. Here the data from ν µ and νµ interactions are from various targets [41][42][43][44]. Although the data here have larger errors, now the default GENIE has a better agreement with the data.…”

“…(color online) Averaged neutral pion multiplicity plot. Here, two predictions from GENIE are compared with bubble chamber ν µ − p, ν µ − n,ν µ − p, andν µ − n π • production data[41][42][43][44].…”

Mean charged multiplicities in charged-current neutrino scattering on hydrogen and deuterium

“…As the very first step, the code computes the average charged-hadron multiplicity using the expression (1) with coefficients determined from the FNAL E545 [27] for νp and νn interactions and CERN WA25 [37] for νp and νn interactions (recall that both experiments used the deuterium-filled bubble chambers). The average hadron multiplicity is then computed as 1.5 n ch , according to the BEBC WA59 data [52] on νNe and νNe charged-current (CC) interactions. At the next step, the actual hadron multiplicity is generated assuming that the multiplicity dispersion is described by the KNO scaling relation [53], n P n (s) = ψ(n/ n ), where P n (s) is the probability of generating n hadrons and ψ(z) is a s-independent universal function parametrized as ψ(z) = 2e −c c cz+1 / (cz + 1), with the input parameter c determined from the KNO-scaling distributions measured in the same deuterium experiments [27,37] for, respectively, neutrino and antineutrino interactions.…”