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The Effect Of Relativistic Correction To Double-spin Asymmetry Parameters In Heavy Quarkonium Color Octet Production

Posted on:2015-10-06Degree:MasterType:Thesis
Country:ChinaCandidate:L L LiuFull Text:PDF
GTID:2180330431486523Subject:Theoretical Physics
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The standard model of particle physics, including the electro-weak interactionand quantum chromodynamics (QCD), is about the strong force, weak force and theelectromagnetic force theory, can be used to explain the movement and variation ofsubatomic particles. This theory has successfully withstood a lot of experimentaltests. But with the development of physics, new physics beyond the standard modeland non-perturbative quantum chromodynamics (QCD), has become the two majorproblems in modern physics. With a lot of dynamic energy scale, Heavy quarkoniumhas become an ideal system to research quantum chromodynamics (QCD). Since1974we found J/, it becomes a hot field of modern physics. With the recentexperimental physics and theoretical physics development, greatly promoted thedevelopment of this field.Heavy Quarkonium Physics has always been the major topics in high energyphysics research, and it has been concerned in theoretical and experimental. Initially,color singlet model (CSM) are used to describe the Heavy Quarkonium Physics. Butin the color singlet model, exsits “infrared divergence”in the calculation P wave ofheavy quarkonium decay. But the color octet mechanisms (COM) can be a goodsolution to these problems.In this article, we discuss double-Spin Asymmetry Parameters was affected byrelativistic effects in the non-relativistic quantum chromodynamics framework onTevetron in the process of production of J/. In the scattering p+p-J/w+X,we mainly consider the sub processes g+g-J/w+g. And we will use theNRQCD factorization and helicity amplitudes method to calculate the scatteramplitude. Finally, we will get the double-Spin Asymmetry Parameters through theGRV and GRVS PDFs.We input different parameters, such as CMCS energy, rapidity, etc., and foundthe conclusion: with increasing transverse momentum, the effect of relativisticcorrection to double-spin asymmetry parameters will gradually become smaller. In addition, our conclusion in this paper not only test parton distribution functions, butalso is able to verify the mechanism of charmonium.
Keywords/Search Tags:NRQCD factorization, helicity amplitudes method, double-spinasymmetry
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