scholarly journals Galactic cannibalism and cold dark matter density profiles

2004 ◽  
Vol 355 (4) ◽  
pp. 1119-1124 ◽  
Author(s):  
C. Nipoti ◽  
T. Treu ◽  
L. Ciotti ◽  
M. Stiavelli
2010 ◽  
Vol 514 ◽  
pp. A47 ◽  
Author(s):  
S. Pasetto ◽  
E. K. Grebel ◽  
P. Berczik ◽  
R. Spurzem ◽  
W. Dehnen

2016 ◽  
Vol 456 (4) ◽  
pp. 3542-3552 ◽  
Author(s):  
Edouard Tollet ◽  
Andrea V. Macciò ◽  
Aaron A. Dutton ◽  
Greg S. Stinson ◽  
Liang Wang ◽  
...  

2004 ◽  
Vol 352 (4) ◽  
pp. 1109-1120 ◽  
Author(s):  
Y. Ascasibar ◽  
G. Yepes ◽  
S. Gottlöber ◽  
V. Müller

2020 ◽  
Vol 904 (1) ◽  
pp. 45 ◽  
Author(s):  
Kohei Hayashi ◽  
Masashi Chiba ◽  
Tomoaki Ishiyama

2006 ◽  
Vol 453 (1) ◽  
pp. 21-25 ◽  
Author(s):  
T. Kronberger ◽  
M. P. Leubner ◽  
E. van Kampen

2021 ◽  
Vol 81 (2) ◽  
Author(s):  
John Ellis ◽  
Jason L. Evans ◽  
Natsumi Nagata ◽  
Keith A. Olive ◽  
L. Velasco-Sevilla

AbstractWe explore the possible values of the $$\mu \rightarrow e \gamma $$ μ → e γ branching ratio, $$\text {BR}(\mu \rightarrow e\gamma )$$ BR ( μ → e γ ) , and the electron dipole moment (eEDM), $$d_e$$ d e , in no-scale SU(5) super-GUT models with the boundary conditions that soft supersymmetry-breaking matter scalar masses vanish at some high input scale, $$M_\mathrm{in}$$ M in , above the GUT scale, $$M_{\mathrm{GUT}}$$ M GUT . We take into account the constraints from the cosmological cold dark matter density, $$\Omega _{CDM} h^2$$ Ω CDM h 2 , the Higgs mass, $$M_h$$ M h , and the experimental lower limit on the lifetime for $$p \rightarrow K^+ \bar{\nu }$$ p → K + ν ¯ , the dominant proton decay mode in these super-GUT models. Reconciling this limit with $$\Omega _{CDM} h^2$$ Ω CDM h 2 and $$M_h$$ M h requires the Higgs field responsible for the charge-2/3 quark masses to be twisted, and possibly also that responsible for the charge-1/3 and charged-lepton masses, with model-dependent soft supersymmetry-breaking masses. We consider six possible models for the super-GUT initial conditions, and two possible choices for quark flavor mixing, contrasting their predictions for proton decay with versions of the models in which mixing effects are neglected. We find that $$\tau \left( p\rightarrow K^+ \bar{\nu }\right) $$ τ p → K + ν ¯ may be accessible to the upcoming Hyper-Kamiokande experiment, whereas all the models predict $$\text {BR}(\mu \rightarrow e\gamma )$$ BR ( μ → e γ ) and $$d_e$$ d e below the current and prospective future experimental sensitivities or both flavor choices, when the dark matter density, Higgs mass and current proton decay constraints are taken into account. However, there are limited regions with one of the flavor choices in two of the models where $$\mu \rightarrow e$$ μ → e conversion on a heavy nucleus may be observable in the future. Our results indicate that there is no supersymmetric flavor problem in the class of no-scale models we consider.


Author(s):  
Michael Kachelriess

The Boltzmann equations, which describe processes as diverse as the evolution of the dark matter density, big bang nucleosynthesis or recombination, are derived. The Gamov criterion states that processes freeze-out when their rate becomes smaller than the Hubble rate. It is demonstrated that the mass of any thermal relic is bounded by ≲ 20TeV, while the abundance of a cold dark matter particle with 〈σ‎v〉 ≃ 3 × 10−26 cm3/s corresponds to the observed one, Ω‎CDM = 0.2. Big bang nucleosynthesis, which successfully explains the abundance of light elements like D and 4He, is discussed.


2010 ◽  
Vol 19 (11) ◽  
pp. 1873-1873
Author(s):  
ANTONINO DEL POPOLO ◽  
ISMAIL SAFFET YEŞILYURT

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