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Baryogenesis from Hawking Radiation--Anson Hook

  1. Jul 29, 2014 #1

    marcus

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    Video:
    http://pirsa.org/14070019
    Asymmetric Hawking Radiation: Baryogenesis from Hawking Radiation
    Anson Hook
    Abstract: We show that in the presence of a chemical potential, black hole evaporation generates baryon number. If the inflaton or Ricci scalar is derivatively coupled to the B-L current, the expansion of the universe acts as a chemical potential and splits the energy levels of particles and their anti-particles. The asymmetric Hawking radiation of primordial black holes can thus be used to generate a B-L asymmetry. If dark matter is produced by the same mechanism, the coincidence between the mass density of visible and dark matter can be naturally explained.
    Date: 29/07/2014

    Corresponding paper:
    http://arxiv.org/abs/1404.0113
    Baryogenesis from Hawking Radiation
    Anson Hook
    We show that in the presence of a chemical potential, black hole evaporation generates baryon number. If the inflaton or Ricci scalar is derivatively coupled to the B-L current, the expansion of the universe acts as a chemical potential and splits the energy levels of particles and their anti-particles. The asymmetric Hawking radiation of primordial black holes can thus be used to generate a B-L asymmetry. If dark matter is produced by the same mechanism, the coincidence between the mass density of visible and dark matter can be naturally explained.
    11 pages, 3 figures.

    someone to know of:
    http://www.ias.edu/people/cos/users/11403
    PhD Stanford 2012, followed by IAS from then to present.
    Inspire record for Baryogenesis paper:
    http://inspirehep.net/record/1288078?ln=en
    Publication profile:
    http://inspirehep.net/author/profile/A.Hook.1
    Field listed as HEP-phenomenology
    Interesting background 1/5 of US Physics Team (Olympiad 2004, Korea)
    http://www.aps.org/publications/apsnews/200410/olympiad.cfm
    http://www.aapt.org/olympiad2004/bio.cfm?StudentID=247
    http://www.towntopics.com/jun0904/other2.html
     
    Last edited: Jul 29, 2014
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  3. Jul 29, 2014 #2

    marcus

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    One thing that intrigued me (could be a meaningless coincidence because of the different roles and ways the concepts are defined) was the fact that a chemical potential plays such an important role BOTH here, in Hook's black hole analysis and in the Loop black hole analysis of Perez and Ghosh:
    http://arxiv.org/abs/1107.1320
    Black hole entropy and isolated horizons thermodynamics
    Amit Ghosh, Alejandro Perez
    (Submitted on 7 Jul 2011)
    We present a statistical mechanical calculation of the thermodynamical properties of (non rotating) isolated horizons. The introduction of Planck scale allows for the definition of an universal horizon temperature (independent of the mass of the black hole) and a well-defined notion of energy (as measured by suitable local observers) proportional to the horizon area in Planck units. The microcanonical and canonical ensembles associated with the system are introduced. Black hole entropy and other thermodynamical quantities can be consistently computed in both ensembles and results are in agreement with Hawking's semiclassical analysis for all values of the Immirzi parameter.
    5 pages. Physical Review Letters (47 cites)
    http://inspirehep.net/record/917420?ln=en

    This is just one of several Perez et al BH papers in which chemical potential (either of particles or of punctures) played a key role.
     
    Last edited: Jul 30, 2014
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