Supersymmetric dark matter at the LHC 7-TeV run

Journal Article · Sun Aug 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.035003· OSTI ID:21432892

Bhattacharyya, Nabanita; Datta, Amitava ^[1]; Poddar, Sujoy ^[2]

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1. Indian Institute of Science Education and Research, Kolkata, Mohanpur Campus, PO: BCKV Campus Main Office, Mohanpur-741252, Nadia, West Bengal (India)
2. Netaji Nagar Day College, 170/436, N.S.C. Bose Road, Kolkata-700 092 (India)

We have analyzed the early LHC signatures of the minimal supergravity (mSUGRA) model. Our emphasis is on the 7-TeV run corresponding to an integrated luminosity of {approx}1.0 fb{sup -1} although we have also discussed briefly the prospects at LHC-10 TeV. We focus on the parameter space yielding relatively light squark and gluinos consistent with the dark matter relic density data and the LEP bounds on the lightest Higgs scalar mass. This parameter space is only allowed for nonvanishing trilinear soft breaking term A{sub 0}. A significant region of the parameter space with large to moderate negative values of A{sub 0} consistent with the stability of the scalar potential and relic density production via neutralino annihilation and/or neutralino--stau coannihilation yields observable signal via the jets+missing transverse energy channel. The one lepton+jets+missing energy signal is also viable over a smaller but nontrivial parameter space. The ratio of the size of the two signals--free from theoretical uncertainties--may distinguish between different relic density generating mechanisms. With efficient {tau}-tagging facilities at 7 TeV, the discriminating power may increase significantly. We also comment on other dark matter relic density allowed mSUGRA scenarios and variants thereof in the context of LHC-7 TeV.

• OSTI ID: 21432892
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevD.82.035003; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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