Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-07-07
Phys.Lett.B669:311-316,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 pages, 6 figures
Scientific paper
10.1016/j.physletb.2008.10.015
The search for the top squark ($\widetilde{t}_{1}$) within the kinematic reach of Tevatron Run II is of great contemporary interest. Such a $\widetilde{t}_{1}$ can explain the baryon asymmetry of the universe provided $120 ~GeV/c^{2} \leq m_{\widetilde{t}_{1}} \leq m_t$. Moreover if $\Delta m \equiv m_{\widetilde{t}_{1}}$ - $m_{\widetilde\chi_1^0}$ is small, where $\widetilde\chi_1^0$ is the LSP, the dark matter relic density as obtained from the WMAP data may be explained via $\widetilde{t}_{1}$- LSP coannihilation. In this scenario the decay $\widetilde{t}_{1} \to c \widetilde\chi_1^0$ is likely to occur with 100 % branching ratio but for small $\Delta m$ the conventional di-jet + $\not E_T$ signal becomes unobservable. We propose a new search strategy based on the $2j + \not E_T$ signature accompanied by an isolated cluster of energy which arises from a decaying heavy particle with characteristic decay length. Our preliminary simulations with PYTHIA indicate that for $100 ~GeV/c^{2} \le m_{\widetilde{t}_{1}} \le 130 ~GeV/c^{2}$ this signal may be observable while somewhat lager $m_{\widetilde{t}_{1}}$ may still provide hints of new physics.
Bhattacharyya Nabanita
Datta Amitava
Maity Manas
No associations
LandOfFree
Search for Top Squarks at Tevatron Inspired by Dark Matter and Electroweak Baryogenesis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Search for Top Squarks at Tevatron Inspired by Dark Matter and Electroweak Baryogenesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for Top Squarks at Tevatron Inspired by Dark Matter and Electroweak Baryogenesis will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-561244