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Title: Measurement of Charged Current Coherent Pion Production by Neutrinos on Carbon at MINER$$\nu$$A

Abstract

Neutrino-nucleus coherent pion production is a rare neutrino scattering process where the squared four-momentum transferred to the nucleus is small, a lepton and pion are produced in the forward direction, and the nucleus remains in its initial state. This process is an important background in neutrino oscillation experiments. Measurements of coherent pion production are needed to constrain models which are used to predict coherent pion production in oscillation experiments. This thesis reports measurements of νµ and νµ charged current coherent pion production on carbon for neutrino energies in the range 2 < Eν < 20 GeV. The measurements were made using data from MINERνA, which is a dedicated neutrino-nucleus scattering experiment that uses a fi scintillator tracking detector in the high-intensity NuMI neutrino beam at Fermilab. Coherent interactions were isolated from the data using only model-independent signatures of the reaction, which are a forward muon and pion, no evidence of nuclear breakup, and small four-momentum transfer to the nucleus. The measurements were compared to the coherent pion production model used by oscillation experiments. The data and model agree in the total interaction rate and are similar in the dependence of the interaction rate on the squared four- momentum transferred frommore » the neutrino. The data and model disagree significantly in the pion kinematics. The measured νµ and νµ interaction rates are consistent, which supports model predictions that the neutrino and antineutrino interaction rates are equal.« less

Authors:
 [1]
  1. Univ. of Rochester, NY (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1341803
Report Number(s):
FERMILAB-THESIS-2016-30
1511231
DOE Contract Number:
AC02-07CH11359
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Mislivec, Aaron Robert. Measurement of Charged Current Coherent Pion Production by Neutrinos on Carbon at MINER$\nu$A. United States: N. p., 2017. Web. doi:10.2172/1341803.
Mislivec, Aaron Robert. Measurement of Charged Current Coherent Pion Production by Neutrinos on Carbon at MINER$\nu$A. United States. doi:10.2172/1341803.
Mislivec, Aaron Robert. Sun . "Measurement of Charged Current Coherent Pion Production by Neutrinos on Carbon at MINER$\nu$A". United States. doi:10.2172/1341803. https://www.osti.gov/servlets/purl/1341803.
@article{osti_1341803,
title = {Measurement of Charged Current Coherent Pion Production by Neutrinos on Carbon at MINER$\nu$A},
author = {Mislivec, Aaron Robert},
abstractNote = {Neutrino-nucleus coherent pion production is a rare neutrino scattering process where the squared four-momentum transferred to the nucleus is small, a lepton and pion are produced in the forward direction, and the nucleus remains in its initial state. This process is an important background in neutrino oscillation experiments. Measurements of coherent pion production are needed to constrain models which are used to predict coherent pion production in oscillation experiments. This thesis reports measurements of νµ and νµ charged current coherent pion production on carbon for neutrino energies in the range 2 < Eν < 20 GeV. The measurements were made using data from MINERνA, which is a dedicated neutrino-nucleus scattering experiment that uses a fi scintillator tracking detector in the high-intensity NuMI neutrino beam at Fermilab. Coherent interactions were isolated from the data using only model-independent signatures of the reaction, which are a forward muon and pion, no evidence of nuclear breakup, and small four-momentum transfer to the nucleus. The measurements were compared to the coherent pion production model used by oscillation experiments. The data and model agree in the total interaction rate and are similar in the dependence of the interaction rate on the squared four- momentum transferred from the neutrino. The data and model disagree significantly in the pion kinematics. The measured νµ and νµ interaction rates are consistent, which supports model predictions that the neutrino and antineutrino interaction rates are equal.},
doi = {10.2172/1341803},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}

Thesis/Dissertation:
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  • The MINERmore » $$\nu$$A detector collected 1.2 × 10 20 POT of $$\nu$$ μ data with the NuMI beam at Fermi National Laboratory from 03/2010 to 07/2010. I will describe an analysis to identify two track charged current muon neutrino quasi-elastic interactions using this data set. The final state muon was identified by curvature using the MINOS detector. The final state contained proton was identified by the energy deposited per unit length at the end of the track. Two additional cuts were applied to separate signal from background: a cut on the extra energy in the event and a cut on a proton energy dependent variable. The dσ/dQ2 using this selection is presented. An initial list of systematic errors is introduced and calculated. In addition to this analysis work, I also developed both pattern recognition schemes used by the experiment, wrote MINOS muon track matching algorithms, implemented a Kalman Filter track fitting algorithm and contributed to various other tasks to the MINER$$\nu$$A experiment; I will provide an explanation of these. I will also give a brief overview of neutrino physics, the NuMI beam, and the MINER$$\nu$$A detector.« less
  • Neutrinos are among the least understood particles in the standard model of particle physics. At neutrino energies in the 1 GeV range, neutrino properties are typically determined by observing the outgoing charged lepton produced in a charged current quasi-elastic interactions. The largest charged current background to these measurements comes from charged current pion production interactions, for which there is very little available data.
  • Understanding of themore » $$\pi^0$$ production via anti-neutrino-nucleus charged current interaction in the neutrino energy region of 1-10 GeV is essential for neutrino oscillation experiments. In this thesis, we present a measurement of charged current $$\pi^0$$ production from anti-muon neutrinos scattering on a polystyrene scintillator (CH) target in the MINER$$\nu$$A experiment. A method for selecting and reconstructing $$CC\pi^0$$ events is presented. The $$\pi^0$$ and $$\mu^+$$ are fully reconstructed in the final state allowing for the measurement of the final state kinematics and the neutrino energy. We describe the two methods developed in this analysis for \p0 reconstruction in the MINERvA experiment: Hough Transform and Angle Scan. Interacting neutrinos have energy $$\sim3.0 GeV$$ and $$\pi^0$$ have energy $$\sim0.3GeV$$. The total $$CC\pi^0$$ cross-section is presented as a function of neutrino energy and $Q^2$. The total Exclusive $$CC\pi^0$$ cross-section is presented as a function of neutrino energy, $Q^2$ and the final state kinematics. Cross Section ratio between Exclusive $$CC\pi^0$$ and Inclusive $$CC\pi^0$$ for data and Monte Carlo are presented. Neutrino beam data corresponding to $$1.019 \times 10^{20}$$ protons on target have been analyzed. For inclusive $$CC\pi^0$$ sample we reconstructed 891 events, and for exclusive $$CC\pi^0$$ sample we reconstructed 514 events.« less
  • Neutrino physics is one of the most active fields in the domaine of high energy physics during the last century. The need of precise measurement of neutrino-nucleus interactions required by the neutrino oscillation experiments is a an exiting step. These measurements of cross-section are more than essential for neutrino oscillation experiment. Over the year, many measurements from varieties of experiments have been presented. MINERνA is one of the world leaders in measuring cross-section of neutrino and antineutrino -nucleus interactions. MINERνA is a neutrino-nucleus scattering experiment installed in the few-GeV NuMI beam line at Fermilab. In order to study nuclear dependence,more » MINERνA is endowed with different types of solid nuclear targets as well are liquid targets such as helium and water. This thesis presents measurements of cross-section of antineutrino scattering off nucleons using a variety of solid nuclear targets, carbon, iron, lead and also polystyrene scintillator (CH). The data set of antineutrino used for this analysis was taken between March and July 2010 with a total of 1.60X10 20 protons on target. Charged current inclusive interactions were selected by requiring a positive muon and kinematics limitation of acceptance of the muon spectrometer are applied. The analysis requires neutrino energy between 2GeV et 20GeV and the angle of muon θ mu < 17degree . The absolute cross-section # as function of neutrino energy and the differential cross-section dσ/ dx bj measured and shown the corresponding systematics for each nuclear targets. Data results are compared with prediction of the models implemented in the neutrino events generators GENIE 2.6.2 used by the experiment.« less
  • This work presents the first comprehensive measurement of neutrino-induced charged-current neutral pion production (CCπ 0) off a nuclear target. The Mini Booster Neutrino Experiment (MiniBooNE) and Booster Neutrino Beam (BNB) are discussed in detail. MiniBooNE is a high-statistics (~ 1, 000, 000 interactions) low-energy (E vϵ 2 0.5 - 2.0 GeV) neutrino experiment located at Fermilab. The method for selecting and reconstructing CCπ 0 events is presented. The π 0 and μ - are fully reconstructed in the final state allowing for the measurement of, among other things, the neutrino energy. The total observable CCπ 0 cross-section is presented asmore » a function of neutrino energy, along with five differential cross-sections in terms of the final state kinematics and Q 2. The results are combined to yield a flux-averaged total cross-section of Φ = (9.2 ± 0.3 stat. ± 1.5 syst.) × 10 -39 cm 2/CH 2 at energy 965 MeV. These measurements will aid future neutrino experiments with the prediction of their neutrino interaction rates.« less