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The Nuclear Effects in the ProtonDeuteron DrellYan Process
Author: WeiZengJiang
Tutor: DuanChunGui
School: Hebei Normal
Course: Theoretical Physics
Keywords: DrellYan process Differential cross section ratio Nuclear effects
CLC: O572.33
Type: Master's thesis
Year: 2008
Downloads: 11
Quote: 0
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Abstract
EMC effect reflects the free nucleon bound nucleon structure function is significantly different from the nuclear environment can affect the internal structure of the nucleon . Highenergy particles and nuclei interaction , one can clearly understand the nuclear environment quark  plastic subsections molecular distribution function ( ie nuclear parton distribution function of the nuclear effects ) , to obtain a more precise bound nucleon parton distribution function . This helps us to better explain the experimental results of the nucleus  nucleus and proton  nucleus collisions , calculate the differential cross section of the process , discover new physics and a new form of matter . Research nuclear environment on nuclear internal molecular distribution function correction , using only the lepton  nucleus deep inelastic scattering experiments given nucleon structure function , data , and can not determine the valence quarks and large  x region of small x region sea ??quark distribution . Proton  nucleus collisions nuclear DrellYan process as a supplement also study the nuclear quark  gluon distribution means . It should be noted that the target of heavy nuclei , the energy loss effect in nuclear DrellYan process of proton  nucleus collisions , when used to determine the nuclear inland sea quark distribution net of the effect . However, for light nuclei target , especially deuteron energy loss effect on the differential cross section of the DrellYan process is very small and can be ignored . Therefore , with the help of the proton  deuteron collision nuclear DrellYan process can be studied nuclear internal momentum distribution of the molecules . In this paper, HKN the deuteron price given quark and sea quark distribution function , and CTEQ given proton of nuclear effects parton distribution function to calculate the proton  deuteron and proton  proton DrellYan process reaction cross sections than σpdσpp were compared with the experimental data of the E866 experiment in cooperation . Can be found in the area to remove large x ( x gt ; 0.2 ) , the calculation results with the experimental results of the E866 group are in good . Deuteron structure function of nuclear reaction cross sections than the σpdσpp the impact of very small effect on the proton  deuteron and proton  proton DrellYan process . Therefore , you can use the proton  the the deuteron collision of the DrellYan process reaction experimental data to study proton parton distribution functions , especially the smell of the sea quark asymmetry .

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CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > Highenergy physics > Particle types > Meson
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