ITP OpenIR  > SCI期刊论文
Liu, Kui-Yong; Ma, Han-Ping; Wu, Xing-Gang; Wu, XG , Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
Spin-flip interactions and the puzzle of psi
Source PublicationPHYSICS LETTERS B
KeywordNrqcd Matrix-elements Root S=1.8 Tev Heavy Quarkonium p(p)Over-bar Collisions Gluon Fragmentation Fermilab-tevatron Qcd Analysis J/psi Factorization Annihilation
AbstractNon-relativistic QCD provides a systematic approach for inclusive decays and productions of a quarkonium. By taking the color-octet components into account, the approach can explain the psi'-anornaly at Tevatron, where the measured production rate at large transverse momentum p perpendicular to is in order of magnitude larger than the predicted with color-singlet components only. With the approach one can predict that the produced J/psi and psi' at large p perpendicular to will be transversely polarized. But such prediction fails in confronting with experimental measurements and this generates a puzzle. We examine the role of spin-flip interactions in the spin density matrix of the transition of a color-octet charm quark pair into J/psi and psi'. These interactions will introduce new non-perturbative parameters in the spin density matrix. Our result shows that the impact of the interactions is always to dilute the polarization and can be very significant. Taking the impact into account, predictions for the polarization are more close to the measured than the previous predicted. The same can also be expected for the polarization of J/psi. (c) 2007 Elsevier B.V. All rights reserved.
2007
ISSN0370-2693
Volume645Issue:40942Pages:180-184
Subject AreaPhysics
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5792
CollectionSCI期刊论文
Corresponding AuthorWu, XG , Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Liu, Kui-Yong,Ma, Han-Ping,Wu, Xing-Gang,et al. Spin-flip interactions and the puzzle of psi[J]. PHYSICS LETTERS B,2007,645(40942):180-184.
APA Liu, Kui-Yong,Ma, Han-Ping,Wu, Xing-Gang,&Wu, XG , Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China.(2007).Spin-flip interactions and the puzzle of psi.PHYSICS LETTERS B,645(40942),180-184.
MLA Liu, Kui-Yong,et al."Spin-flip interactions and the puzzle of psi".PHYSICS LETTERS B 645.40942(2007):180-184.
Files in This Item:
File Name/Size DocType Version Access License
Spin-flip interactio(247KB) 开放获取LicenseApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu, Kui-Yong]'s Articles
[Ma, Han-Ping]'s Articles
[Wu, Xing-Gang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, Kui-Yong]'s Articles
[Ma, Han-Ping]'s Articles
[Wu, Xing-Gang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, Kui-Yong]'s Articles
[Ma, Han-Ping]'s Articles
[Wu, Xing-Gang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.