Baryogenesis from oscillations of charmed or beautiful baryons
Abstract
Here, we propose a model for CP violating oscillations of neutral, heavy-flavored baryons into antibaryons at rates which are within a few orders of magnitude of their lifetimes. The flavor structure of the baryon violation suppresses neutron oscillations and baryon number violating nuclear decays to experimentally allowed rates. We also propose a scenario for producing such baryons in the early Universe via the out-of-equilibrium decays of a neutral particle, after hadronization but before nucleosynthesis. We find parameters where CP violating baryon oscillations at a temperature of a few MeV could result in the observed asymmetry between baryons and antibaryons. Additionally, part of the relevant parameter space for baryogenesis is potentially testable at Belle II via decays of heavy flavor baryons into an exotic neutral fermion. The model introduces four new particles: three light Majorana fermions and a colored scalar. The lightest of these fermions is typically long lived on collider timescales and may be produced in decays of bottom and possibly charmed hadrons.
- Authors:
-
- Univ. of Washington, Seattle, WA (United States)
- Univ. of Pittsburgh, PA (United States)
- Consejo Superior de Investigaciones Cientificas (CSIC), Valencia (Spain). Univ. Politecnica de Valencia (CSIC-UPV)
- Publication Date:
- Research Org.:
- Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); Ministry of Economic Affairs and Digital Transformation of Spain (MINECO)
- OSTI Identifier:
- 1595822
- Alternate Identifier(s):
- OSTI ID: 1398729
- Grant/Contract Number:
- SC0011637; FPA2014-58183-P; SEV-2014-0398
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 96; Journal Issue: 7; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Aitken, Kyle, McKeen, David, Neder, Thomas, and Nelson, Ann E. Baryogenesis from oscillations of charmed or beautiful baryons. United States: N. p., 2017.
Web. doi:10.1103/PhysRevD.96.075009.
Aitken, Kyle, McKeen, David, Neder, Thomas, & Nelson, Ann E. Baryogenesis from oscillations of charmed or beautiful baryons. United States. https://doi.org/10.1103/PhysRevD.96.075009
Aitken, Kyle, McKeen, David, Neder, Thomas, and Nelson, Ann E. Mon .
"Baryogenesis from oscillations of charmed or beautiful baryons". United States. https://doi.org/10.1103/PhysRevD.96.075009. https://www.osti.gov/servlets/purl/1595822.
@article{osti_1595822,
title = {Baryogenesis from oscillations of charmed or beautiful baryons},
author = {Aitken, Kyle and McKeen, David and Neder, Thomas and Nelson, Ann E.},
abstractNote = {Here, we propose a model for CP violating oscillations of neutral, heavy-flavored baryons into antibaryons at rates which are within a few orders of magnitude of their lifetimes. The flavor structure of the baryon violation suppresses neutron oscillations and baryon number violating nuclear decays to experimentally allowed rates. We also propose a scenario for producing such baryons in the early Universe via the out-of-equilibrium decays of a neutral particle, after hadronization but before nucleosynthesis. We find parameters where CP violating baryon oscillations at a temperature of a few MeV could result in the observed asymmetry between baryons and antibaryons. Additionally, part of the relevant parameter space for baryogenesis is potentially testable at Belle II via decays of heavy flavor baryons into an exotic neutral fermion. The model introduces four new particles: three light Majorana fermions and a colored scalar. The lightest of these fermions is typically long lived on collider timescales and may be produced in decays of bottom and possibly charmed hadrons.},
doi = {10.1103/PhysRevD.96.075009},
journal = {Physical Review D},
number = 7,
volume = 96,
place = {United States},
year = {2017},
month = {10}
}
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