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Light anti-quark flavor asymmetry in the nucleon sea and the nuclear dependence of anti-quarks in nuclei at the SeaQuest Experiment

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Title
Light anti-quark flavor asymmetry in the nucleon sea and the nuclear dependence of anti-quarks in nuclei at the SeaQuest Experiment
Name (type = personal)
NamePart (type = family)
Tadepalli
NamePart (type = given)
Arun S.
NamePart (type = date)
1984-
DisplayForm
Arun S. Tadepalli
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Gilman
NamePart (type = given)
Ronald
DisplayForm
Ronald Gilman
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Chou
NamePart (type = given)
John Paul
DisplayForm
John Paul Chou
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Ransome
NamePart (type = given)
Ron
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Ron Ransome
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Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Kloet
NamePart (type = given)
Wim
DisplayForm
Wim Kloet
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Reimer
NamePart (type = given)
Paul
DisplayForm
Paul Reimer
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
School of Graduate Studies
Role
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school
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Text
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theses
OriginInfo
DateCreated (encoding = w3cdtf); (qualifier = exact)
2019
DateOther (encoding = w3cdtf); (qualifier = exact); (type = degree)
2019-10
CopyrightDate (encoding = w3cdtf); (qualifier = exact)
2019
Language
LanguageTerm (authority = ISO 639-3:2007); (type = text)
English
Subject (authority = RUETD)
Topic
Physics and Astronomy
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TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_10174
PhysicalDescription
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application/pdf
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text/xml
Extent
1 online resource (xxxiii, 270 pages) : illustrations
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Abstract (type = abstract)
Fermilab E906/SeaQuest is an experiment aimed at studying the anti-quark distributions of nucleons and nuclei. The experiment uses a 120 GeV/c proton beam extracted from the Main Injector at Fermilab to collide with various solid and cryogenic targets to study a variety of physics topics. The experiment takes advantage of the Drell-Yan process in order to probe specifically the high-x anti-quark distributions of the target nucleus. The acceptance of the spectrometer is tuned to explore the unprecedentedly high Bjorken-x region, thereby extending our knowledge of the anti-quark sea structure of nucleons and nuclei.
A new Intensity-Extrapolation method was developed to counter the rate dependence challenge at SeaQuest. Using this method, the ratio of cross sections of liquid deuterium and liquid hydrogen, σpd(x)/2σpp(x), was measured in the range0.1≤xT≤0.45. The results have been found to be consistently above 1 for all values of the measured range of xT. Also, a first look at ̄d(x)/ ̄u(x) is presented. The trend of the data points indicate that the ratio is consistently above 1 for the measured range of xT. These results (when combined with more data) will provide a key input in constraining many theoretical models that attempt to explain the origin of the nucleon sea.
Using the same method, the nuclear dependence of the per-nucleon cross section ratio, RpA, of carbon, iron and tungsten versus deuterium studied as a function of xT, pT, and xF are reported. The results for xT are consistent with E772 indicating little nuclear dependence. A striking A (atomic mass) dependence in which there is a depletion of low-pT dimuons and an excess of high-pT dimuons relative to deuterium is reported. Also, an A dependence for the drop in RpA(xF) for increasing xF is presented. An analysis with and without the cut xT>0.16 (which removes the effects of the shadowing) gives consistent results indicating that the effects of shadowing are small. These results (when combined with more data) will address important questions on the modification of anti-quark distributions in nuclei and in modeling energy loss for partons traversing a cold nuclear medium.
Subject (authority = local)
Topic
Flavor asymmetry
Subject (authority = LCSH)
Topic
Quantum flavor dynamics
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
Identifier (type = local)
rucore10001600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/t3-2ccn-7w70
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Tadepalli
GivenName
Arun
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2019-08-29 17:40:48
AssociatedEntity
Name
Arun Tadepalli
Role
Copyright holder
Affiliation
Rutgers University. School of Graduate Studies
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Type
License
Name
Author Agreement License
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
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Copyright protected
Availability
Status
Open
Reason
Permission or license
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2019-09-13T13:27:14
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2019-09-13T13:27:14
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