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Baryon number generation from cosmic string loops
Institution:1. NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL 60510, USA;1. Program in Applied Mathematics, The University of Arizona, Tucson, AZ 85721, USA;2. Department of Physics, The University of Arizona, Tucson, AZ 85721, USA;3. Department of Physics and Graduate Institute of Astrophysics, National Taiwan University, Taipei, 10617, Taiwan;1. Dipartimento di Fisica, Università di Torino, via P. Giuria 1, I-10125 Torino, Italy;2. Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via P. Giuria 1, I-10125 Torino, Italy;3. Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, PT4150-762 Porto, Portugal;4. Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, PT4169-007 Porto, Portugal;5. Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, the Netherlands;6. Univ. Lyon, Univ. Lyon1, ENS de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon UMR5574, 69230, Saint-Genis-Laval, France;7. Leibniz-Institut für Astrophysik, Potsdam (AIP), An der Sternwarte 16, 14482 Potsdam, Germany;1. Research Center for the Early Universe (RESCEU), Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan;2. Department of Physics, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan;3. Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), WPI, UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8568, Japan
Abstract:Baryon number generation due to the decay of particle-antiparticle pairs created from cosmic string loops is studied. In the situation when cusp evaporation occurs a significant baryon asymmetry (baryon/entropy ∼ 10−4 ϵ: ϵ is a net baryon asymmetry generated from one pair of particle-antiparticle) can be generated.
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