Antisymmetric rank--2 tensor unparticle physics
| dc.creator | Hur, Tae-il | |
| dc.creator | Ko, P. | |
| dc.creator | Wu, Xiao-Hong | |
| dc.date | 2007-09-05 | |
| dc.date.accessioned | 2026-07-07T11:42:14Z | |
| dc.date.available | 2026-07-07T11:42:14Z | |
| dc.description | We present the phenomenology of antisymmetric rank-2 tensor unparticle operator ${\cal O}_{\cal U,A}^{μν}$ with scaling dimension $d_{\cal U}$. We consider the physical effects of operator $O_{\cal U,A}^{μν}$ in $Z^0$ boson invisible decays $Z^0 \to {\cal U}$, $Z^0 \to b \bar{b}$ channel, the electroweak precision observable $S$ parameter, and the muon anomalous magnetic dipole moment. The $Z^0$ boson invisible decay gives a very stringent constraint in the $(Λ_{\cal U}, M_{\cal U})$ plane, and only small $r \equiv Λ_{\cal U} / M_{\cal U} \lesssim 0.1$ is favored, when $Λ_{\cal U}$ is order of several 100 GeV. When the phenomenological parameter $μ$, which parameterizes the scale invariance breaking, goes to 0, the $S$ parameter and the muon $(g-2)$ diverge for $1 < d_{\cal U} < 2$, while for non-zero $μ$, there will be constraints on $(Λ_{\cal U}, M_{\cal U})$ which are more stringent than those obtained from collider experiments. | |
| dc.description | 12 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0709.0629 | |
| dc.identifier | http://arxiv.org/abs/0709.0629 | |
| dc.identifier | Phys.Rev.D76:096008,2007 | |
| dc.identifier | doi:10.1103/PhysRevD.76.096008 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/200819 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Antisymmetric rank--2 tensor unparticle physics | |
| dc.type | text |