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Insensitivity of leptogenesis with flavour effects to low energy leptonic CP violation

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Insensitivity of leptogenesis with flavour effects to low energy leptonic CP violation

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Davidson, Sacha; Garayoa, Julia; Palorini, Federica; Rius Dionis, Nuria

Aquest document és un/a article, creat/da en: 2007

If the baryon asymmetry of the Universe is produced by leptogenesis, CP violation is required in the lepton sector. In the seesaw extension of the standard model with three hierarchical right-handed neutrinos, we show that the baryon asymmetry is insensitive to the Pontecorvo-Maki-Nagakawa-Sakata phases: thermal leptogenesis can work for any value of the observable phases. This result was well known when there were no flavor effects in leptogenesis; we show that it remains true when flavor effects are included.

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