Darío Núñez et al JCAP05(2008)003 doi:10.1088/1475-7516/2008/05/003
Constraining the mSUGRA (minimal supergravity) parameter space using the entropy of dark matter halos
Darío Núñez1, Jesús Zavala1,4, Lukas Nellen1, Roberto A Sussman1,5, Luis G Cabral-Rosetti2 and Myriam Mondragón3 (For the Instituto Avanzado de Cosmología, IAC)
Show affiliationsWe derive an expression for the entropy of a dark matter halo described using a Navarro–Frenk–White model with a core. The comparison of this entropy with that of dark matter in the freeze-out era allows us to constrain the parameter space in mSUGRA models. Moreover, combining these constraints with the ones obtained from the usual abundance criterion and demanding that these criteria be consistent with the 2σ bounds for the abundance of dark matter: 0.112≤ΩDMh2≤0.122, we are able to clearly identify validity regions among the values of tanβ, which is one of the parameters of the mSUGRA model. We found that for the regions of the parameter space explored, small values of tanβ are not favored; only for 
are the two criteria significantly consistent. In the region where the two criteria are consistent we also found a lower bound for the neutralino mass, mχ≥141 GeV.
- Keywords
- PACS
-
95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological)
14.80.Ly Supersymmetric partners of known particles
95.30.Tg Thermodynamic processes, conduction, convection, equations of state
- Subjects
- Dates
-
Issue 05 (May 2008)
Received 23 October 2007, accepted for publication 18 April 2008
Published 6 May 2008
-
Constraining the mSUGRA (minimal supergravity) parameter space using the entropy of dark matter halos
Darío Núñez et al JCAP05(2008)003
-
Luminescent small-diameter 3C-SiC nanocrystals fabricated via a simple chemical etching method
J Zhu et al 2007 Nanotechnology 18 365603
-
Detection of damage initiation and its evolution in insulating brick from non-linearity of stress/strain curve
R Zhang et al 2009 J. Phys.: Conf. Ser. 191 012005
-
Exchange bias in epitaxial Fe/Ir0.2Mn0.8 bilayers grown on MgO (0 0 1)
S G Wang et al 2009 J. Phys. D: Appl. Phys. 42 225001
-
Guided wave propagation in honeycomb sandwich structures using a piezoelectric actuator/sensor system
F Song et al 2009 Smart Mater. Struct. 18 125007
-
The Kundu–Eckhaus equation and its discretizations
Decio Levi and Christian Scimiterna 2009 J. Phys. A: Math. Theor. 42 465203
-
A comment on the presence of spurious states in finite basis approximations
R C Andrew and H G Miller 2008 J. Phys. A: Math. Theor. 41 158001
-
Peer review statement
2008 J. Phys.: Conf. Ser. 188 011002
-
Pulse trains in molecular dynamics and coherent spectroscopy: a theoretical study
J Voll and R de Vivie-Riedle 2009 New J. Phys. 11 105036
-
Solving the Einstein constraint equations on multi-block triangulations using finite element methods
Oleg Korobkin et al 2009 Class. Quantum Grav. 26 145007
Users also read
What's this?- Is a classical language adequate in assessing the detectability of the redshifted 21 cm signal from the early Universe?
- DEFROST: a new code for simulating preheating after inflation
- Signatures of non-Gaussianity in the curvaton model