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Compressed supersymmetry at 14 TeV LHC

Biplob Bhattacherjee*

Arghya Choudhury

Kirtiman Ghosh

Sujoy Poddar§

  • Kavli IPMU (WPI), The University of Tokyo, Kashiwa, Chiba 277-8583, Japan

  • Department of Physical Sciences, Indian Institute of Science Education and Research—Kolkata, Mohanpur-741252, West Bengal, India

  • Department of Physics and Oklahoma Center for High Energy Physics, Oklahoma State University, Stillwater, Oklahoma 74078-3072, USA

  • Netaji Nagar Day College, 170/436, N.S.C. Bose Road, Kolkata—700092, India

  • *biplob.bhattacherjee@ipmu.jp
  • arghyac@iiserkol.ac.in
  • kirti.gh@gmail.com
  • §sujoy.phy@gmail.com

Phys. Rev. D 89, 037702 – Published 19 February, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.037702

Abstract

In this work we study the collider phenomenology of a compressed supersymmetric model with the gluino (g˜) and the lightest neutralino (χ˜10). All other sparticles are assumed to be heavy. We consider gluino pair production at the 14 TeV LHC and present the mass reach of the gluino as a function of mass splitting between the gluino and the lightest neutralino. We find that the gluino mass below 1 TeV can be excluded at 95% C.L. with an integrated luminosity of 100fb1 for the extreme degenerate case where the mass separation between the gluino and the lightest neutralino is about 20 GeV. On the other hand, the lower bound on the mass of the gluino increases to 1.2–1.3 TeV if the mass splitting between the gluino and χ˜10 is about 200 GeV. This result shows that for a degenerate gluino, the current mass limit may approximately extend up to 400–500 GeV at the 14 TeV LHC.

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