2007/12/21 by Leonardo Campanelli, L. Campanelli, M. Ruggieri +1 · 3 citations
Physics and Astronomy · #Baryon #Black Holes and Theoretical Physics #Charge (physics) #Combinatorics #Cosmology and Gravitation Theories #Energy (signal processing) #Gravitino #Mathematical physics #Minimal Supersymmetric Standard Model #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Supergravity #Supersymmetry #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.77.043504
published as Phys.Rev.D77:043504,2008 · 6 pages, 2 columns, 6 figures. To appear on Phys. Rev. D
arxiv created 2007/12/21 · openalex publication_date 2008/02/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study numerically a class of nontopological solitons, the Q-balls, arising in a supersymmetric extension of the standard model with low-energy, gauge-mediated symmetry breaking. Taking into account the exact form of the supersymmetric potential giving rise to Q-balls, we find that there is a lower limit on the value of the charge Q in order to make them classically stable: Q\ensuremath\gtrsim5\ifmmode×\else\texttimes\fi102Qcr, where Qcr is constant depending on the parameters defining the potential and can be in the range 1\ensuremath\lesssimQcr\ensuremath\lesssim10^8\textdiv16. If Q is the baryon number, stability with respect to the decay into protons requires Q\ensuremath\gtrsim1017Qcr, while if the gravitino mass is greater then m3/2\ensuremath\gtrsim61 MeV, no stable gauge-mediation supersymmetric Q-balls exist. Finally, we find that energy and radius of Q-balls can be parametrized as E\ensuremath∼\ensuremathξEQ3/4 and R\ensuremath∼\ensuremathξRQ1/4, where \ensuremathξE and \ensuremathξR are slowly varying functions of the charge.