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Probing Parton Distributions in Proton Using Drell-Yan and Charmonium Production in p + p and p + d Interactions With 120 GeV Proton Beam at Fermilab
Probing Parton Distributions in Proton Using Drell-Yan and Charmonium Production in p + p ...
Probing Parton Distributions in Proton Using Drell-Yan and Charmonium Production in p + p and p + d Interactions With 120 GeV Proton Beam at Fermilab

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105658
ISBN  
9798263307523
DDC  
537
저자명  
Leung, Ching Him.
서명/저자  
Probing Parton Distributions in Proton Using Drell-Yan and Charmonium Production in p + p and p + d Interactions With 120 GeV Proton Beam at Fermilab
발행사항  
[Sl] : University of Illinois at Urbana-Champaign, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
141 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Sickles, Anne M.
학위논문주기  
Thesis (Ph.D.Physics.)--University of Illinois at Urbana-Champaign, 2024.
초록/해제  
요약E906/SeaQuest is a fixed-target experiment at Fermilab with a 120 GeV proton beam. The primary goal of the experiment is to study the partonic structure of the nucleon. Muon pairs with mass between 2 to 9 GeV from the interaction of proton beam with various targets, including liquid hydrogen and deuterium, have been detected. These events contains muons originating from the Drell-Yan process as well as charmonium decays. The measurement of the Drell-Yan σpd/2σpp cross section ratio is particularly sensitive to the light sea-quark asymmetry in the proton. The SeaQuest measurement provides information on the ¯d/u¯ asymmetry for Bjorken-x ranging from 0.1 to 0.45. The improved statistics of the SeaQuest measurement allows for a check on the surprising behavior of ¯d/u¯ at large x observed in E866/NuSea. The Drell-Yan cross section ratio is extracted from the entire SeaQuest dataset using two independent methods. The measured σpd/2σpp ratio is found to remain about unity, indicating the ¯d u¯ for x up to 0.45. The new result is compared with various parton distribution functions and theoretical calculations. In contrast to the Drell-Yan process, the charmonium production can be used to probe both the quark content as well as the gluon content. While the charmonium production mechanism is not as well understood as the Drell-Yan process, the large J/ψ production cross section allows for a higher statistics measurement. The SeaQuest charmonium production measurement covers the forward rapidity region of 0.5 xF 0.9. The measured cross sections are found to be in good agreement with theoretical calculations based on non relativistic QCD (NRQCD). The σψ0/σJ/ψ cross section ratios are found to increase as xF increases, indicating that the qq¯ annihilation process has larger contributions to the ψ 0 production than the J/ψ production. The σpd/2σpp cross section ratios are observed to be significantly different between the Drell-Yan process and charmonium production, reflecting the different production mechanisms. The PT distributions for J/ψ and ψ 0 production are also presented and compared with data collected at higher energies.
일반주제명  
Electromagnetics
일반주제명  
Nuclear physics
일반주제명  
Physics
일반주제명  
Physical chemistry
키워드  
Drell-Yan process
키워드  
Charmonium
키워드  
SeaQuest
키워드  
Parton distribution
기타저자  
University of Illinois at Urbana-Champaign Physics
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■24510▼aProbing  Parton  Distributions  in  Proton  Using  Drell-Yan  and  Charmonium  Production  in  p  +  p  and  p  +  d  Interactions  With  120  GeV  Proton  Beam  at  Fermilab
■260    ▼a[Sl]▼bUniversity  of  Illinois  at  Urbana-Champaign▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a141  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Sickles,  Anne  M.
■5021  ▼aThesis  (Ph.D.Physics.)--University  of  Illinois  at  Urbana-Champaign,  2024.
■520    ▼aE906/SeaQuest  is  a  fixed-target  experiment  at  Fermilab  with  a  120  GeV  proton  beam.  The  primary  goal  of  the  experiment  is  to  study  the  partonic  structure  of  the  nucleon.  Muon  pairs  with  mass  between  2  to  9  GeV  from  the  interaction  of  proton  beam  with  various  targets,  including  liquid  hydrogen  and  deuterium,  have  been  detected.  These  events  contains  muons  originating  from  the  Drell-Yan  process  as  well  as  charmonium  decays.  The  measurement  of  the  Drell-Yan  σpd/2σpp  cross  section  ratio  is  particularly  sensitive  to  the  light  sea-quark  asymmetry  in  the  proton.  The  SeaQuest  measurement  provides  information  on  the  ¯d/u¯  asymmetry  for  Bjorken-x  ranging  from  0.1  to  0.45.  The  improved  statistics  of  the  SeaQuest  measurement  allows  for  a  check  on  the  surprising  behavior  of  ¯d/u¯  at  large  x  observed  in  E866/NuSea.  The  Drell-Yan  cross  section  ratio  is  extracted  from  the  entire  SeaQuest  dataset  using  two  independent  methods.  The  measured  σpd/2σpp  ratio  is  found  to  remain  about  unity,  indicating  the  ¯d    u¯  for  x  up  to  0.45.  The  new  result  is  compared  with  various  parton  distribution  functions  and  theoretical  calculations.  In  contrast  to  the  Drell-Yan  process,  the  charmonium  production  can  be  used  to  probe  both  the  quark  content  as  well  as  the  gluon  content.  While  the  charmonium  production  mechanism  is  not  as  well  understood  as  the  Drell-Yan  process,  the  large  J/ψ  production  cross  section  allows  for  a  higher  statistics  measurement.  The  SeaQuest  charmonium  production  measurement  covers  the  forward  rapidity  region  of  0.5    xF    0.9.  The  measured  cross  sections  are  found  to  be  in  good  agreement  with  theoretical  calculations  based  on  non  relativistic  QCD  (NRQCD).  The  σψ0/σJ/ψ  cross  section  ratios  are  found  to  increase  as  xF  increases,  indicating  that  the  qq¯  annihilation  process  has  larger  contributions  to  the  ψ  0  production  than  the  J/ψ  production.  The  σpd/2σpp  cross  section  ratios  are  observed  to  be  significantly  different  between  the  Drell-Yan  process  and  charmonium  production,  reflecting  the  different  production  mechanisms.  The  PT  distributions  for  J/ψ  and  ψ  0  production  are  also  presented  and  compared  with  data  collected  at  higher  energies.
■590    ▼aSchool  code:  0090.
■650  4▼aElectromagnetics
■650  4▼aNuclear  physics
■650  4▼aPhysics
■650  4▼aPhysical  chemistry
■653    ▼aDrell-Yan  process
■653    ▼aCharmonium
■653    ▼aSeaQuest
■653    ▼aParton  distribution
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■690    ▼a0607
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■690    ▼a0494
■71020▼aUniversity  of  Illinois  at  Urbana-Champaign▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0090
■791    ▼aPh.D.Physics.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17361051▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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