PROTON DECAY AS A COSMIC STRING CONSTRAINT

1991 ◽  
Vol 06 (09) ◽  
pp. 769-773
Author(s):  
A.M. MATHESON
Keyword(s):  
Cosmic String ◽  
Baryon Number ◽  
Proton Decay ◽  
Millisecond Pulsar ◽  
Baryon Number Violation ◽  
Number Violation ◽  
String Models ◽  
The Universe

In some cosmic string models the strings may give rise to baryon number violation. Constraints are derived on theories of this kind, from the measured limits on proton decay and the timing residual of the millisecond pulsar, by requiring that strings should not wash out the observed baryon-to-entropy ratio of the universe.

scholarly journals COMMON ORIGIN OF BARYON ASYMMETRY AND PROTON DECAY

2013 ◽  
Vol 28 (34) ◽  
pp. 1350159 ◽  
Author(s):  
PEI-HONG GU ◽  
UTPAL SARKAR
Keyword(s):  
Vacuum Expectation ◽  
Baryon Number ◽  
Proton Decay ◽  
Lepton Number ◽  
Double Beta Decay ◽  
Common Origin ◽  
Electroweak Phase Transition ◽  
Lepton Asymmetry ◽  
Baryon Number Violation ◽  
Number Violation

A successful baryogenesis theory requires a baryon-minus-lepton number violation if it works before the electroweak phase transition. The leading dimension-6 baryon number violating interactions conserve baryon-minus-lepton number, which dissociated baryogenesis from baryon number violation. We show that in some models, in which the baryon-minus-lepton number is violated in the proton and neutron decays, the baryogenesis and the nucleon decay could have a common origin. We extend the canonical seesaw model with an isotriplet leptoquark scalar and two isotriplet Higgs scalars and allow the Higgs triplet to have a quartic coupling with three leptoquark triplets and a cubic coupling with two Higgs doublets. The decays of the Higgs triplets can thus generate a baryon-minus-lepton asymmetry. The tiny vacuum expectation values of the Higgs triplets can naturally induce a testable proton decay even if the leptoquark is around the TeV scale. The leptoquark associated with any flavor neutrinos can mediate a neutrinoless double beta decay.

BARYOGENESIS WITHOUT BARYON NUMBER VIOLATION

1990 ◽  
Vol 05 (21) ◽  
pp. 1623-1628 ◽  
Author(s):  
SCOTT DODELSON ◽  
LAWRENCE M. WIDROW
Keyword(s):  
High Temperatures ◽  
Mass Density ◽  
Scalar Particle ◽  
Baryon Number ◽  
Entropy Density ◽  
New Paradigm ◽  
Weakly Interacting ◽  
Baryon Number Violation ◽  
Number Violation ◽  
The Universe

We review a new paradigm for baryogenesis in which the fundamental Lagrangian is baryon conserving [invariant under U (1) B ]. At high temperatures, U (1)B is spontaneously broken and an excess of quarks over antiquarks of 10−10s (s≡entropy density) is produced. Today, U(1)B is restored. A fundamental consequence of our assumptions is that the baryon number of the Universe is constant. If initially zero, it will be zero today. The excess baryon number produced in the quark fields is exactly compensated by antibaryon number in a weakly interacting scalar particle. We suggest that this scalar provides the mass density necessary to close the Universe.

Baryon-number violation at accelerator energies

1983 ◽  
Vol 28 (9) ◽  
pp. 2248-2257 ◽  
Author(s):  
Paul Langacker ◽  
Deshdeep Sahdev
Keyword(s):  
Baryon Number ◽  
Baryon Number Violation ◽  
Number Violation
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