baryogenesis and b physics pdf

Baryogenesis and b physics pdf

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Published: 13.04.2021

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We show how C P violating B meson oscillations in conjunction with baryon number violating decays can generate the cosmological asymmetry between matter and antimatter, and explore the parameter space of a simple, self-contained model, which can be tested via exotic B meson decays, and via the charge asymmetry in semileptonic decays of neutral B mesons.

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Robert H. We consider electroweak baryogenesis mediated by embedded domain walls. Embedded domain walls originating from a symmetry breaking phase transition are stabilized by thermal plasma effects, so that the electroweak symmetry is unbroken in their cores. For this reason, the cosmological evolution of such domain walls can generate a sufficiently large baryon asymmetry, irrespective of the order of the electroweak phase transition. For embedded domain walls, the condition that the energy of the universe not be dominated by the energy of the domain walls is relaxed significantly, and it is shown to be compatible with our scenario of electroweak baryogenesis. Google Scholar. Google Preview.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs and how to get involved. High Energy Physics - Phenomenology. Comments: 17 pages, 6 figures. D 99, DOI : Change to browse by: astro-ph astro-ph.

In physical cosmology , baryogenesis is the physical process that is hypothesized to have taken place during the early universe to produce baryonic asymmetry , i. One of the outstanding problems in modern physics is the predominance of matter over antimatter in the universe. The universe, as a whole, seems to have a nonzero positive baryon number density — that is, matter exists. Since it is assumed in cosmology that the particles we see were created using the same physics we measure today, it would normally be expected that the overall baryon number should be zero, as matter and antimatter should have been created in equal amounts. This has led to a number of proposed mechanisms for symmetry breaking that favour the creation of normal matter as opposed to antimatter under certain conditions. This imbalance would have been exceptionally small, on the order of 1 in every 10 10 10 particles a small fraction of a second after the Big Bang, but after most of the matter and antimatter annihilated, what was left over was all the baryonic matter in the current universe, along with a much greater number of bosons. Experiments reported in at Fermilab , however, seem to show that this imbalance is much greater than previously assumed.

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Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs and how to get involved. High Energy Physics - Phenomenology. Authors: James M.


Baryogenesis and Dark Matter from B Mesons. Authors:Gilly Elor, Miguel Escudero, Ann E. Nelson · Download PDF. Abstract: We present a new.


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We propose a simple model in which the baryon asymmetry and dark matter are created via the decays and inverse decays of QCD-triplet scalars, at least one of which must be in the TeV mass range. Singlet fermions produced in these decays constitute the dark matter. The singlets never reach equilibrium, and their coherent production, propagation, and annihilation generates a baryon asymmetry.

5 comments

  • Fructuoso L. 14.04.2021 at 03:00

    PDF | We show how CP violating B meson oscillations in conjunction with baryon number We briefly review the physics of neutral B-meson.

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  • Livino R. 17.04.2021 at 20:20

    PDF | We present a new mechanism of baryogenesis and dark matter production in The Standard Model of particle physics (SM), while now.

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  • Ololathe 19.04.2021 at 14:33

    Explaining the cosmic matter-antimatter asymmetry requires CP-violation beyond that of the Standard Model.

    Reply

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