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Title: Neutralino reconstruction in supersymmetry with long-lived staus

Abstract

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.

Authors:
;  [1]
  1. Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad - 211 019 (India)
Publication Date:
OSTI Identifier:
21300881
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 79; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.79.115009; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHIRALITY; EXTRACTION; MASS; MUONS; NEUTRINOS; PARTICLE DECAY; PARTICLE TRACKS; SPACE; SPARTICLES; SPECTRA; SUPERGRAVITY; SUPERSYMMETRY; YUKAWA POTENTIAL

Citation Formats

Biswas, Sanjoy, and Mukhopadhyaya, Biswarup. Neutralino reconstruction in supersymmetry with long-lived staus. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.79.115009.
Biswas, Sanjoy, & Mukhopadhyaya, Biswarup. Neutralino reconstruction in supersymmetry with long-lived staus. United States. https://doi.org/10.1103/PHYSREVD.79.115009
Biswas, Sanjoy, and Mukhopadhyaya, Biswarup. 2009. "Neutralino reconstruction in supersymmetry with long-lived staus". United States. https://doi.org/10.1103/PHYSREVD.79.115009.
@article{osti_21300881,
title = {Neutralino reconstruction in supersymmetry with long-lived staus},
author = {Biswas, Sanjoy and Mukhopadhyaya, Biswarup},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.79.115009},
url = {https://www.osti.gov/biblio/21300881}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 11,
volume = 79,
place = {United States},
year = {2009},
month = {6}
}