Charged-particle multiplicity distributions in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ν</mml:mi><mml:mi>n</mml:mi></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ν</mml:mi><mml:mi>p</mml:mi></mml:math>charged-current interactions

Ziemińska, D.; Kunori, S.; Chang, C. Y.; Snow, G. A.; Son, D.; Steinberg, P.; Burnstein, R. A.; Hanlon, J.; Rubin, H. A.; Engelmann, R.; Kafka, T.; Sommars, S.; Kitagaki, T.; Tanaka, S.; Yuta, H.; Abe, K.; Hasegawa, K.; Yamaguchi, A.; Tamai, K.; Hayashino, T.; Otani, Yoshimi; Hayano, H.; Chang, C. C.; Mann, W. A.; Napier, A.; Schneps, J.

doi:10.1103/physrevd.27.47

Cited by 50 publications

(51 citation statements)

References 38 publications

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“…Hadronization is described by the AKGY model [37], which uses KNO scaling [38] for invariant masses of W ≤ 2.3 GeV, and PYTHIA [39] for invariant masses of W ≤ 3.0 GeV, with a smooth transition in between. The low-W KNO model is tuned to data from the Fermilab 15-foot bubble chamber experiment [40], and the high-W PYTHIA model is tuned to BEBC data [41]. We note that retuning of the PYTHIA model has been discussed elsewhere [42], although is not considered here as it affects larger W values than are relevant for this study.…”

Section: Genie Single Pion Production Modelmentioning

confidence: 99%

Constraining the GENIE model of neutrino-induced single pion production using reanalyzed bubble chamber data

Rodrigues¹,

Wilkinson²,

McFarland³

2016

Eur. Phys. J. C

102

138

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The longstanding discrepancy between bubble chamber measurements of ν μ -induced single pion production channels has led to large uncertainties in pion production cross section parameters for many years. We extend the reanalysis of pion production data in deuterium bubble chambers where this discrepancy is solved (Wilkinson et al., PRD 90, 112017 2014) to include the ν μ n → μ − pπ 0 and ν μ n → μ − nπ + channels, and use the resulting data to fit the parameters of the GENIE pion production model. We find a set of parameters that can describe the bubble chamber data better than the GENIE default parameters, and provide updated central values and reduced uncertainties for use in neutrino oscillation and cross section analyses which use the GENIE model. We find that GENIE's non-resonant background prediction has to be significantly reduced to fit the data, which may help to explain the recent discrepancies between simulation and data observed by the MINERνA coherent pion and NOνA oscillation analyses.

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Section: Genie Single Pion Production Modelmentioning

confidence: 99%

Constraining the GENIE model of neutrino-induced single pion production using reanalyzed bubble chamber data

Rodrigues¹,

Wilkinson²,

McFarland³

2016

Eur. Phys. J. C

102

138

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“…z = n/ n and an input parameter c. The input parameter is used to tune the function to agree with data, which is mainly taken from the Fermilab 15-foot bubble chamber experiment [14]. At higher energy regions the AGKY model gradually transitions from the KNO scaling-based model to PYTHIA6 discussed later.…”

Section: Genie Agky Hadronization Modelmentioning

confidence: 99%

First Look at PYTHIA8 Hadronization Program for Neutrino Interaction Generators

Katori

Lasorak

Mandalia

et al. 2016

Proceedings of the 10th International Workshop on Neutrino-Nucleus Interactions in Few-GeV Region (NuInt15)

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Current and future neutrino oscillation experiments utilize information of hadronic final states to improve sensitivities on oscillation parameters measurements. Among the physics of hadronic systems in neutrino interactions, the hadronization model controls multiplicities and kinematics of final state hadrons from the primary interaction vertex. For relatively high invariant mass events, neutrino interaction generators rely on the PYTHIA6 hadronization program. Here, we show a possible improvement of this process in neutrino event generators, by utilizing expertise from the HERMES experiment. Next, we discuss the possibility to implement the PYTHIA8 program in neutrino interaction generators, including GENIE and NEUT. Finally, we show preliminary comparisons of PYTHIA8 predictions with neutrino hadron multiplicity data from bubble chamber experiments within the GE-NIE hadronization validation tool.

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“…The scaling function is parametrised by the Levy function, L(z, c) = 2e −c c cz+1 /Γ(cz + 1) with z = n/ n , and an input parameter c. The input parameter is used to tune the function so it agrees with data, which is mainly taken from the Fermilab 15-foot bubble chamber [7]. At higher energy regions the AGKY model gradually transitions from the KNO scaling-based model to PYTHIA discussed previously.…”

Section: Agky Modelmentioning

confidence: 99%

“…Both GENIE and NuWro [21] tuned these PYTHIA parameters to improve the agreement with data Figure 2: (color online) Averaged charged hadron multiplicity plot. Here, two predictions from GENIE are compared with bubble chamber ν µ − p and ν µ − n hadron production data [7,15].…”

Section: Averaged Charged Hadron Multiplicitymentioning

confidence: 99%

Hadronization processes in neutrino interactions

Katori¹

2015

Proceedings of 16th International Workshop on Neutrino Factories and Future Neutrino Beam Facilities — PoS(NUFACT2014)

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Next generation neutrino oscillation experiments utilize details of hadronic final states to improve the precision of neutrino interaction measurements. The hadronic system was often neglected or poorly modelled in the past, but they have significant effects on high precision neutrino oscillation and cross-section measurements. Among the physics of hadronic systems in neutrino interactions, the hadronization model controls multiplicities and kinematics of final state hadrons from the primary interaction vertex. For relatively high invariant mass events, many neutrino experiments rely on the PYTHIA program. Here, we show a possible improvement of this process in neutrino event generators, by utilizing expertise from the HERMES experiment. Finally, we estimate the impact on the systematics of hadronization models for neutrino mass hierarchy analysis using atmospheric neutrinos such as the PINGU experiment.

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Charged-particle multiplicity distributions inνnandνpcharged-current interactions

Cited by 50 publications

References 38 publications

Constraining the GENIE model of neutrino-induced single pion production using reanalyzed bubble chamber data

Constraining the GENIE model of neutrino-induced single pion production using reanalyzed bubble chamber data

First Look at PYTHIA8 Hadronization Program for Neutrino Interaction Generators

Hadronization processes in neutrino interactions

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