Neutralino reconstruction in supersymmetry with long-lived staus

Biswas, Sanjoy ; Mukhopadhyaya, Biswarup (2009) Neutralino reconstruction in supersymmetry with long-lived staus Physical Review D - Particles, Fields, Gravitation and Cosmology, 79 (11). Article ID 115009. ISSN 1550-7998

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We consider a supergravity scenario, with universal scalar and gaugino masses at high scale, with a right-chiral neutrino superfield included in the spectrum. Such a scenario can have the lightest supersymmetric particle (LSP) dominated by the right sneutrino and a stau as the next-to lightest supersymmetric particle (NLSP). Since decays of all particles into the LSP are suppressed by the neutrino Yukawa coupling, the signal of supersymmetry consists of charged tracks of stable particles in the muon chamber. We demonstrate how a neutralino decaying into a tau and the stau NLSP can be fully reconstructed over substantial areas in the supergravity parameter space. We also suggest event selection criteria for eliminating backgrounds, including combinatorial ones, and use a new method for the extraction of the mass of the stau NLSP, using its three-momentum as obtained from the curvature of the charged track.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:114630
Deposited On:04 Jun 2018 11:25
Last Modified:04 Jun 2018 11:25

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