Baryogenesis from an earlier phase transition
Abstract
We explore the possibility that the observed baryon asymmetry of the Universe is the result of an earlier phase transition in which an extended gauge sector breaks down into the SU(3){sub C}xSU(2){sub L}xU(1){sub Y} of the standard model. Our prototypical example is the topflavor model, in which there is a separate SU(2){sub 1} for the third generation from the SU(2){sub 2} felt by the first two generations. We show that the breakdown of SU(2){sub 1}xSU(2){sub 2}{yields}SU(2){sub L} results in lepton number being asymmetrically distributed throughout the three families, and provided the SM electroweak phase transition is not strongly first order, results in a nonzero baryon number, which for parameter choices that can be explored at the LHC may explain the observed baryon asymmetry.
 Authors:
 Kavli Institute for Cosmological Physics, Enrico Fermi Institute and Department of Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637 (United States)
 (United States)
 HEP Division, Argonne National Laboratory, 9700 Cass Avenue, Argonne, Illinois 60439 (United States)
 Publication Date:
 OSTI Identifier:
 21020134
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevD.75.063510; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BARYON NUMBER; BARYONS; CERN LHC; ELECTROMAGNETIC INTERACTIONS; LEPTON NUMBER; PHASE TRANSFORMATIONS; STANDARD MODEL; SU2 GROUPS; SU3 GROUPS; U1 GROUPS; UNIVERSE; WEAK INTERACTIONS
Citation Formats
Shu Jing, Wagner, Carlos E. M., HEP Division, Argonne National Laboratory, 9700 Cass Avenue, Argonne, Illinois 60439, and Tait, Tim M. P. Baryogenesis from an earlier phase transition. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVD.75.063510.
Shu Jing, Wagner, Carlos E. M., HEP Division, Argonne National Laboratory, 9700 Cass Avenue, Argonne, Illinois 60439, & Tait, Tim M. P. Baryogenesis from an earlier phase transition. United States. doi:10.1103/PHYSREVD.75.063510.
Shu Jing, Wagner, Carlos E. M., HEP Division, Argonne National Laboratory, 9700 Cass Avenue, Argonne, Illinois 60439, and Tait, Tim M. P. Thu .
"Baryogenesis from an earlier phase transition". United States.
doi:10.1103/PHYSREVD.75.063510.
@article{osti_21020134,
title = {Baryogenesis from an earlier phase transition},
author = {Shu Jing and Wagner, Carlos E. M. and HEP Division, Argonne National Laboratory, 9700 Cass Avenue, Argonne, Illinois 60439 and Tait, Tim M. P.},
abstractNote = {We explore the possibility that the observed baryon asymmetry of the Universe is the result of an earlier phase transition in which an extended gauge sector breaks down into the SU(3){sub C}xSU(2){sub L}xU(1){sub Y} of the standard model. Our prototypical example is the topflavor model, in which there is a separate SU(2){sub 1} for the third generation from the SU(2){sub 2} felt by the first two generations. We show that the breakdown of SU(2){sub 1}xSU(2){sub 2}{yields}SU(2){sub L} results in lepton number being asymmetrically distributed throughout the three families, and provided the SM electroweak phase transition is not strongly first order, results in a nonzero baryon number, which for parameter choices that can be explored at the LHC may explain the observed baryon asymmetry.},
doi = {10.1103/PHYSREVD.75.063510},
journal = {Physical Review. D, Particles Fields},
number = 6,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}

We explore the possibility that the observed baryon asymmetry of the Universe is the result of an earlier phase transition in which an extended gauge sector breaks down into the SU(3){sub c} x SU(2){sub L} x U(1){sub Y} of the standard model. Our prototypical example is the topflavor model, in which there is a separate SU(2){sub 1} for the third generation from the SU(2){sub 2} felt by the first two generations. We show that the breakdown of SU(2){sub 1} x SU(2){sub 2} {yields} SU(2){sub L} results in lepton number being asymmetrically distributed throughout the three families, and provided the SMmore »

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