An updated study of Upsilon production and polarization at the Tevatron and LHC
文献类型：期刊论文
| 作者 | Feng Y(冯宇) ; Gong B(龚斌); Wan LP(万露萍); Wang JX(王建雄); Feng; Y; Gong; B; Wan; LP
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| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2015 |
| 卷号 | 39期号:12页码:123102 |
| 关键词 | non-relativistic quantum chromodynamics next-to-leading order Upsilon chi(bJ) feed-down contributions polarization |
| 通讯作者 | 冯宇 ; 龚斌 ; 万露萍 ; 王建雄 |
| 英文摘要 | Following the nonrelativistic QCD factorization scheme, by taking the latest available measurements of chi(bJ) (3P) into consideration, we present an updated study on the yield and polarization of Upsilon(1S, 2S, 3S) hadroproduction, and the fractions of chi(bJ) (MP) feed-down in Upsilon(nS) production at QCD next-to-leading order. In the fitting, three schemes are applied with different choices of chi(bJ)(mP) feed-down ratios and NRQCD factorization scale. The results can explain the measurements of yield very well. The polarization puzzle to Upsilon(3S) is now solved by considering the chi(bJ)(3P) feed-down contributions. The ratio of sigma[chi(b2)(1P)]/sigma[chi(b1)(1P)] measured by the CMS experiment can also be reproduced in our prediction. Among the different schemes, the results show little difference, but there are sizeable differences for the fitted long-distance color-octet matrix elements. This may bring large uncertainties when the values are applied in theoretical predictions for other experiments such as those at ee, ep colliders. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear ; Physics, Particles & Fields |
| 收录类别 | SCI ; CA |
| WOS记录号 | WOS:000367418600005 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/229050]  |
| 专题 | 高能物理研究所_理论物理室 |
| 推荐引用方式 GB/T 7714 | Feng Y,Gong B,Wan LP,et al. An updated study of Upsilon production and polarization at the Tevatron and LHC[J]. CHINESE PHYSICS C,2015,39(12):123102. |
| APA | 冯宇.,龚斌.,万露萍.,王建雄.,Feng.,...&JX.(2015).An updated study of Upsilon production and polarization at the Tevatron and LHC.CHINESE PHYSICS C,39(12),123102. |
| MLA | 冯宇,et al."An updated study of Upsilon production and polarization at the Tevatron and LHC".CHINESE PHYSICS C 39.12(2015):123102. |
入库方式： OAI收割
来源：高能物理研究所
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