| Title | New color-octet vector boson revisited |
| Authors | Wang, Xiao-Ping Wang, You-Kai Xiao, Bo Xu, Jia Zhu, Shou-hua |
| Affiliation | Peking Univ, Inst Theoret Phys, Beijing 100871, Peoples R China. Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China. Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China. |
| Issue Date | 2011 |
| Publisher | physical review d |
| Citation | PHYSICAL REVIEW D.2011,83,(11). |
| Abstract | Motivated by CDF Collaboration recent measurements on di-jet invariant mass spectrum, where di-jet is associated with charged leptons (e/mu) and missing energy, we reexamined the previous proposed massive color-octet axial-vectorlike boson Z(c). Our simulation showed that the di-jet bump around 120-160 GeV can be induced by Z(c) with effective coupling g(Zcq (q) over bar) = 0.2g(s) (q represents the quark other than top and g(s) is the strong coupling constant). Moreover our numerical investigation indicated that the top quark forward-backward asymmetry A(FB)(t) can be reproduced without distorting shape of differential cross section d sigma/dM(t (t) over bar), provided that the Z(c) and top quark coupling is appropriately chosen (g(Zct ($) over bar) similar or equal to 4.5g(Zcq (q) over bar)). Our results also showed that the theoretical A(FB)(t) as functions of Delta(y) and M-t (t) over bar can be consistent with data within 1 sigma and 1.8 sigma, respectively. |
| URI | http://hdl.handle.net/20.500.11897/297067 |
| ISSN | 1550-7998 |
| DOI | 10.1103/PhysRevD.83.115010 |
| Indexed | SCI(E) |
| Appears in Collections: | 核物理与核技术国家重点实验室 |
