Exploring Nucleon Spin Structure Through Neutrino Neutral Current Interactions In Microboone PDF Download
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Release | : 2017 |
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Download Exploring Nucleon Spin Structure Through Neutrino Neutral-Current Interactions in MicroBooNE. Book in PDF, ePub and Kindle
The net contribution of the strange quark spins to the proton spin, $\Delta s$, can be determined from neutral current elastic neutrino-proton interactions at low momentum transfer combined with data from electron-proton scattering. The probability of neutrino-proton interactions depends in part on the axial form factor, which represents the spin structure of the proton and can be separated into its quark flavor contributions. Low momentum transfer neutrino neutral current interactions can be measured in MicroBooNE, a high-resolution liquid argon time projection chamber (LArTPC) in its first year of running in the Booster Neutrino Beamline at Fermilab. The signal for these interactions in MicroBooNE is a single short proton track. We present our work on the automated reconstruction and classification of proton tracks in LArTPCs, an important step in the determination of neutrino- nucleon cross sections and the measurement of $\Delta s$.
Author | : Denis Perevalov |
Publisher | : |
Total Pages | : 268 |
Release | : 2010 |
Genre | : Electronic dissertations |
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Download Neutrino-nucleus Neutral Current Elastic Interactions Measurement in MiniBooNE Book in PDF, ePub and Kindle
The MiniBooNE experiment at the Fermi National Accelerator Laboratory (Fermilab) was designed to search for electron to muon neutrino oscillations at Delta m^2~1 eV^2 using an intense neutrino flux with an average energy of about 700 MeV. From 2002 to 2009 MiniBooNE has accumulated more than 1.0x10^{21} protons on target (POT) in both neutrino and antineutrino modes. MiniBooNE provides a perfect platform for detailed measurements of exclusive and semiinclusive neutrino cross-sections, for which MiniBooNE has the largest samples of events up to date, such as neutral current elastic (NCE), neutral current pi^0, charged current quasi-elastic (CCQE), charged current pi^+, and other channels. These measured cross-sections, in turn, allow to improve the knowledge of nucleon structure. This thesis is devoted to the study of NCE interactions. Neutrino-nucleus neutral current elastic scattering accounts for about 18% of all neutrino interactions in MiniBooNE. Using a high-statistics, high purity sample of NCE interactions in MiniBooNE, the flux-averaged NCE differential cross-section has been measured and is being reported here. Further study of the NCE cross-section allowed for probing the structure of nuclei. The main interest in the NCE cross-section is that it may be sensitive to the strange quark contribution to the nucleon spin, $Delta s$, this however requires a separation of NCE proton from NCE neutron events, which in general is a challenging task. MiniBooNE uses a Cherenkov detector, which imposes restrictions on the measured nucleon kinematic variables, mainly due to the impossibility to reconstruct the nucleon direction below the Cherenkov threshold. However, at kinetic energies above this threshold MiniBooNE is able to identify NCE proton events that do not experience final state interactions. These events were used for the $Delta s$ measurement. In this thesis MiniBooNE reports the NCE (n+p) cross-section, the measurement of the axial mass, $M_A$, and the $Delta s$ parameter from the NCE data.
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Total Pages | : 16 |
Release | : 1995 |
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Download Neutral Current Neutrino-nucleon Scattering Book in PDF, ePub and Kindle
It may appear unusual to have a contribution on neutrino scattering at a school devoted to electromagnetic probes, as the neutrino has no known electromagnetic couplings. However, as a means to examine the hidden flavor currents in the nucleon, the recent results observed for the spin structure function of the nucleon have focused attention on the nucleon's neutral weak currents (NWC). When an electromagnetic probe is scattered elastically from a nucleon, the NWC interactions are observable only through the detection of very small (> 10−6) parity-violating processes. In the case of neutrino scattering, the NWC is the dominant coupling. In what follows it will be shown how the nucleon's vector and axial vector form factors arising from strange quark currents can be measured via neutrino elastic scattering. Preliminary results from the Large Scintillation Neutrino Detector (LSND) at LAMPF will be presented as well as a recent analysis of an earlier experiment (E734) carried out at Brookhaven.
Author | : M. Sajjad Athar |
Publisher | : Cambridge University Press |
Total Pages | : 975 |
Release | : 2020-12-03 |
Genre | : Science |
ISBN | : 1108489060 |
Download The Physics of Neutrino Interactions Book in PDF, ePub and Kindle
A comprehensive introduction to neutrino physics with detailed description of neutrinos and their properties.
Author | : Bernard Frois |
Publisher | : World Scientific |
Total Pages | : 702 |
Release | : 1998-02-24 |
Genre | : |
ISBN | : 9814545406 |
Download The Spin Structure Of The Nucleon Book in PDF, ePub and Kindle
From its early beginnings at SLAC in the 1970's, the study of nucleon spin structure using polarized lepton beams and polarized nucleon targets has become increasingly important in nuclear and particle physics, with current experiments at several of the world's high energy and nuclear physics laboratories (CERN, DESY, SLAC and Jefferson Lab) and with enormous related theoretical studies. The understanding of the fascinating but complicated problem of nucleon spin structure has progressed substantially, but fundamental questions remain and it can be confidently predicted that future activity will be high.The Erice Course on The Spin Structure of the Nucleon covered both the experimental and theoretical aspects of the subject, and this volume includes the lectures given at the School. In many cases the lecture material has been extended and updated by the authors. In addition, several recent publications on experimental work have been added in an appendix.
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Total Pages | : 268 |
Release | : 2009 |
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Download Neutrino-nucleus Neutral Current Elastic Interactions Measurement in MiniBooNE. Book in PDF, ePub and Kindle
The MiniBooNE experiment at the Fermi National Accelerator Laboratory (Fermilab) was designed to search for [nu]{sub {mu}} 2![nu]{sub e} neutrino oscillations at [Delta]m2 H"1 eV2 using an intense neutrino flux with an average energy E{sub [nu]} H"700 MeV. From 2002 to 2009 MiniBooNE has accumulated more than 1.0 x 1021 protons on target (POT) in both neutrino and antineutrino modes. MiniBooNE provides a perfect platform for detailed measurements of exclusive and semiinclusive neutrino cross-sections, for which MiniBooNE has the largest samples of events up to date, such as neutral current elastic (NCE), neutral current [pi]°, charged current quasi-elastic (CCQE), charged current [pi], and other channels. These measured cross-sections, in turn, allow to improve the knowledge of nucleon structure. This thesis is devoted to the study of NCE interactions. Neutrino-nucleus neutral current elastic scattering ([nu]N 2![nu]N) accounts for about 18% of all neutrino interactions in MiniBooNE. Using a high-statistics, high purity sample of NCE interactions in MiniBooNE, the flux-averaged NCE differential cross-section has been measured and is being reported here. Further study of the NCE cross-section allowed for probing the structure of nuclei. The main interest in the NCE cross-section is that it may be sensitive to the strange quark contribution to the nucleon spin, [Delta]s, this however requires a separation of NCE proton ([nu]p 2![nu]p) from NCE neutron ([nu]n 2!{nu}n) events, which in general is a challenging task. MiniBooNE uses a Cherenkov detector, which imposes restrictions on the measured nucleon kinematic variables, mainly due to the impossibility to reconstruct the nucleon direction below the Cherenkov threshold. However, at kinetic energies above this threshold MiniBooNE is able to identify NCE proton events that do not experience final state interactions (FSI). These events were used for the [Delta]s measurement. In this thesis MiniBooNE reports the NCE (n+p) cross-section, the measurement of the axial mass, M{sub A}, and the [Delta]s parameter from the NCE data.
Author | : Frank Smith Merritt |
Publisher | : |
Total Pages | : 266 |
Release | : 1977 |
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Download The Structure of the Neutral Current Coupling in High Energy Neutrino-nucleon Interactions Book in PDF, ePub and Kindle
Author | : John Allen Slate |
Publisher | : |
Total Pages | : 386 |
Release | : 1985 |
Genre | : Neutrinos |
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Download A Comparison of Neutral to Charged Current, Neutrino-nucleon Interactions in a Wide Band Neutrino Beam at Fermilab Book in PDF, ePub and Kindle
Author | : A.K. Mann |
Publisher | : Springer Science & Business Media |
Total Pages | : 164 |
Release | : 1997-05-08 |
Genre | : Science |
ISBN | : 9781563962288 |
Download Neutrino Interactions with Electrons and Protons Book in PDF, ePub and Kindle
Market: Researchers and graduate students in high energy physics, physics historians. This book contains 13 papers that reflect the development of neutrino interactions with the electrons and protons in a fixed-target experiment that, beginning in 1980, grew out of the formal collaboration in high energy physics between Japanese and American institutions. These experiments were crucial to the merger of quantum electrodynamics and quantum weak dynamics, the foundation of electroweak theory today.
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Total Pages | : 16 |
Release | : 1994 |
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Download Neutrino-nucleon Scattering Book in PDF, ePub and Kindle
In the following, the author tries to summarize the current status of neutrino-nucleon scattering as it bears on contemporary issues regarding the spin structure of the nucleon. It is straightforward to express the electroweak current of a hadron in terms of its underlying electroweak partonic currents. The matrix elements of these currents are, of course, presently uncalculable but may be characterized by form factors extracted from experiment. When neutrinos are used as probes, there are several problems associated with carrying out the required cross section measurements. Active neutrino detectors of necessity contain nuclei more complex than hydrogen. These nuclei create additional backgrounds and create complications of interpretation that make these experiments challenging. However, given the continued demonstrated difficulty of measuring and extracting the spin structure functions, it appears that there are no easy measurements to investigate the nucleon spin structure save the earlier experiments that fixed the axial vector form factors of well-known baryon decays (neutron, lambda, etc.). With the emergence of the provocative results from the EMC group on the spin structure function of the proton, there has been renewed interest in the information contained in the cross sections for neutral current neutrino-nucleon scattering. The theoretical background for describing this process has been worked out in detail. It is presented in briefest outline below to define the terms needed to describe experimental results.