| QCD corrections to polarization of J/psi and Upsilon at Fermilab Tevatron and CERN LHC |
| Gong B(龚斌) ; Wang JX(王建雄); Gong, G; Wang, JX
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| 2008
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| 发表期刊 | PHYSICAL REVIEW D
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| 卷号 | 78期号:7页码:74011 |
| 通讯作者 | [Gong, Bin] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
; Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
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| 摘要 | In this work, we present more details of the calculation on the next-to-leading-order (NLO) QCD corrections to polarization of direct J/psi production via color singlet at the Tevatron and LHC, together with the results for Upsilon for the first time. Our results show that the J/psi polarization status drastically changes from transverse polarization dominant at leading order into longitudinal polarization dominant in the whole range of the transverse momentum p(t) of J/psi when the NLO corrections are counted. For Upsilon production, the p(t) distribution of the polarization status behaves almost the same as that for J/psi except that the NLO result is transverse polarization at small p(t) range. Although the theoretical evaluation predicts a larger longitudinal polarization than the measured value at the Tevatron, it may provide a solution towards the previous large discrepancy for J/psi and Upsilon polarization between theoretical prediction and experimental measurement, and suggests that the next important step is to calculate the NLO corrections to hadronproduction of color-octet state J/psi((8)) and Upsilon((8)). Our calculations are performed in two ways: namely, we do and do not analytically sum over the polarizations, and then check them with each other. |
| 文章类型 | Article
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| 学科领域 | Astronomy & Astrophysics; Physics
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| 研究领域[WOS] | Astronomy & Astrophysics
; Physics
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| DOI | 10.1103/PhysRevD.78.074011
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| URL | 查看原文
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| 语种 | 英语
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| WOS类目 | Astronomy & Astrophysics
; Physics, Particles & Fields
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| WOS记录号 | WOS:000260574800047
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/240778
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| 专题 | 理论物理室
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| 作者单位 | 中国科学院高能物理研究所
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推荐引用方式
GB/T 7714 |
Gong B,Wang JX,Gong, G,et al. QCD corrections to polarization of J/psi and Upsilon at Fermilab Tevatron and CERN LHC[J]. PHYSICAL REVIEW D,2008,78(7):74011.
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| APA |
龚斌,王建雄,Gong, G,&Wang, JX.(2008).QCD corrections to polarization of J/psi and Upsilon at Fermilab Tevatron and CERN LHC.PHYSICAL REVIEW D,78(7),74011.
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| MLA |
龚斌,et al."QCD corrections to polarization of J/psi and Upsilon at Fermilab Tevatron and CERN LHC".PHYSICAL REVIEW D 78.7(2008):74011.
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