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New Color-Octet Vector Boson Revisit | | Xiao-Ping Wang
; You-Kai Wang
; Bo Xiao
; Jia Xu
; Shou-hua Zhu
; | | Date: |
11 Apr 2011 | | Abstract: | Motivated by CDF recent measurements on di-jet invariant mass spectrum where
di-jet is associated production with charged leptons ($e/mu$) and missing
energy, we re-examine the previous proposed massive color-octet
axial-vector-like boson $Z_c$. Our simulation showed that the di-jet bump
around 120-160 GeV can be induced by $Z_c$ with effective coupling $g_{Z_c q
ar q} =0.2 g_s$ (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 $dsigma/d M_{tar t}$,
provided that the $Z_c$ and top quark coupling is appropriately chosen ($g_{Z_c
t ar t} simeq 4.5 g_{Z_c q ar q}$). Our results also showed that the
theoretical $A_{FB}^t$ as functions of $Delta y$ and $M_{tar t}$ can be
consistent with data within $1sigma$ and $1.8sigma$ respectively. | | Source: | arXiv, 1104.1917 | | Services: | Forum | Review | PDF | Favorites | |
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