New scenario for GUT scale baryogenesis and novel nucleon decay modes in SO(10)

2013 ◽  
Author(s):  
K. S. Babu
Keyword(s):  
Decay Modes ◽  
Nucleon Decay ◽  
Gut Scale

scholarly journals Proton decay in supersymmetric SU(4)c × SU(2)L × SU(2)R

2020 ◽  
Vol 2020 (10) ◽  
Author(s):  
George Lazarides ◽  
Mansoor Ur Rehman ◽  
Qaisar Shafi
Keyword(s):  
Essential Role ◽  
Baryon Number ◽  
Proton Decay ◽  
Unified Theory ◽  
Grand Unified Theory ◽  
Decay Modes ◽  
Proposed Model ◽  
Hybrid Inflation ◽  
Gut Scale ◽  
Chiral Superfields

Abstract We discuss proton decay in a recently proposed model of supersymmetric hybrid inflation based on the gauge symmetry SU(4)c× SU(2)L× SU(2)R. A U(1) R symmetry plays an essential role in realizing inflation as well as in eliminating some undesirable baryon number violating operators. Proton decay is primarily mediated by a variety of color triplets from chiral superfields, and it lies in the observable range for a range of intermediate scale masses for the triplets. The decay modes include p → e+(μ+) + π0, $$ p\to \overline{\nu}+{\pi}^{+} $$ p → ν ¯ + π + , p → K0 + e+(μ+), and $$ p\to {K}^{+}+\overline{\nu} $$ p → K + + ν ¯ , with a lifetime estimate of order 1034–1036 yrs and accessible at Hyper-Kamiokande and future upgrades. The unification at the Grand Unified Theory (GUT) scale MGUT (∼ 1016 GeV) of the Minimal Supersymmetric Standard Model (MSSM) gauge couplings is briefly discussed.

scholarly journals New limits on nucleon decay modes to neutrinos

1997 ◽  
Vol 411 (3-4) ◽  
pp. 326-329 ◽  
Author(s):  
J-F. Glicenstein
Keyword(s):  
Decay Modes ◽  
Nucleon Decay

THE SEARCH FOR NUCLEON DECAY AT SUPER-KAMIOKANDE

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 855-859 ◽  
Author(s):  
◽  
KENNETH S. GANEZER
Keyword(s):  
Confidence Level ◽  
Atmospheric Neutrino ◽  
Branching Ratio ◽  
Decay Modes ◽  
Nucleon Decay ◽  
Supersymmetric Theories ◽  
Lower Limits

We have analyzed 1144 days of Super-Kamiokande data for 13 of the more than 40 possible nucleon decay modes. We have studied p→e+π0, and twelve other two particle B-L conserving decay modes including those with kaons that are preferred in supersymmetric theories. Most modes are currently free of candidate events. In all cases the number of candidates is consistent with atmospheric neutrino induced backgrounds. We have calculated 90% confidence level single sided lower limits on the lifetime of the neutron and proton (divided by the unknown branching ratio) for the studied modes. All of our lower limits are higher than previous best limits by a factor of 2-10. Our limit for p→e+π0 is now 4.4×1033 years.

scholarly journals Employing nucleon decay as a fingerprint of SUSY GUT models using SusyTCProton

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Stefan Antusch ◽  
Christian Hohl ◽  
Vasja Susič
Keyword(s):  
Software Tool ◽  
Decay Rates ◽  
Low Energy ◽  
Nucleon Decay ◽  
Mixing Parameters ◽  
Grand Unified Theories ◽  
Fermion Masses ◽  
Unified Theories ◽  
Rich Information ◽  
Gut Scale

Abstract While the observation of nucleon decay would be a smoking gun of Grand Unified Theories (GUTs) in general, the ratios between the decay rates of the various channels carry rich information about the specific GUT model realization. To investigate this fingerprint of GUT models in the context of supersymmetric (SUSY) GUTs, we present the software tool SusyTCProton, which is an extension of the module SusyTC to be used with the REAP package. It allows to calculate nucleon decay rates from the relevant dimension five GUT operators specified at the GUT scale, including the full loop-dressing at the SUSY scale. As an application, we investigate the fingerprints of two example GUT toy models with different flavor structures, performing an MCMC analysis to include the experimental uncertainties for the charged fermion masses and CKM mixing parameters. While both toy models provide equally good fits to the low energy data, we show how they could be distinguished via their predictions of ratios for nucleon decay rates. Together with SusyTCProton we also make the additional module ProtonDecay public. It can be used independently from REAP and allows to calculate nucleon decay rates from given D = 5 and D = 6 operator coefficients (accepting the required SUSY input for the D = 5 case in SLHA format). The D = 6 functionality can also be used to calculate nucleon decay in non-SUSY GUTs.

scholarly journals Moderately suppressed dimension-five proton decay in a flipped SU(5) model

2022 ◽  
Vol 2022 (1) ◽  
Author(s):  
Naoyuki Haba ◽  
Toshifumi Yamada
Keyword(s):  
Mass Term ◽  
Proton Decay ◽  
Model Structure ◽  
Ckm Matrix ◽  
Decay Modes ◽  
Yukawa Couplings ◽  
Higher Dimensional ◽  
Gut Scale ◽  
Higgs Fields ◽  
Current Bound

Abstract We study colored Higgsino-mediated proton decay (dimension-five proton decay) in a model based on the flipped SU(5) GUT. In the model, the GUT-breaking 10, $$ \overline{\mathbf{10}} $$ 10 ¯ fields have a GUT-scale mass term and gain VEVs through higher-dimensional operators, which induces an effective mass term between the color triplets in the 5, $$ \overline{\mathbf{5}} $$ 5 ¯ Higgs fields that is not much smaller than the GUT scale. This model structure gives rise to observable dimension-five proton decay, and at the same time achieves moderate suppression on dimension-five proton decay that softens the tension with the current bound on Γ(p → K+$$ \overline{\nu} $$ ν ¯ ). We investigate the flavor dependence of the Wilson coefficients of the operators relevant to dimension-five proton decay, by relating them with diagonalized Yukawa couplings and CKM matrix components in MSSM, utilizing the fact that the GUT Yukawa couplings are in one-to-one correspondence with the MSSM Yukawa couplings in flipped models. Then we numerically evaluate the Wilson coefficients, and predict the distributions of the ratios of the partial widths of various proton decay modes.

Results from the Fréjus experiment for nucleon decay modes into anti-neutrino + meson

1989 ◽  
Vol 313 (3) ◽  
pp. 509-540 ◽  
Author(s):  
Ch. Berger ◽  
M. Fröhlich ◽  
H. Mönch ◽  
R. Nisius ◽  
F. Raupach ◽  
...  
Keyword(s):  
Decay Modes ◽  
Nucleon Decay

Lifetime limits on (B-L)-violating nucleon decay and di-nucleon decay modes from the Fréjus experiment

1991 ◽  
Vol 269 (1-2) ◽  
pp. 227-233 ◽  
Author(s):  
C. Berger ◽  
M. Fröhlich ◽  
H. Mönch ◽  
R. Nisius ◽  
F. Raupach ◽  
...  
Keyword(s):  
Decay Modes ◽  
Nucleon Decay

scholarly journals Improved lower bounds on partial lifetimes for nucleon decay modes

2019 ◽  
Vol 100 (11) ◽  
Author(s):  
Sudhakantha Girmohanta ◽  
Robert Shrock
Keyword(s):  
Lower Bounds ◽  
Decay Modes ◽  
Nucleon Decay
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