scholarly journals SU(5)×U(1)X axion model with observable proton decay

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
Nobuchika Okada ◽  
Digesh Raut ◽  
Qaisar Shafi
Keyword(s):  
Proton Decay

scholarly journals Search for proton decay via p→e+π0 and p→μ+π0 with an enlarged fiducial volume in Super-Kamiokande I-IV

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
A. Takenaka ◽  
K. Abe ◽  
C. Bronner ◽  
Y. Hayato ◽  
M. Ikeda ◽  
...  
Keyword(s):  
Proton Decay ◽  
Fiducial Volume

scholarly journals Light-cone sum rules for proton decay

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Ulrich Haisch ◽  
Amando Hala
Keyword(s):  
Lattice Qcd ◽  
Light Cone ◽  
Sum Rules ◽  
State Of The Art ◽  
Form Factors ◽  
Baryon Number ◽  
Proton Decay ◽  
Matrix Elements ◽  
Decay Channels ◽  
Systematic Uncertainties

Abstract We estimate the form factors that parametrise the hadronic matrix elements of proton-to-pion transitions with the help of light-cone sum rules. These form factors are relevant for semi-leptonic proton decay channels induced by baryon-number violating dimension-six operators, as typically studied in the context of grand unified theories. We calculate the form factors in a kinematical regime where the momentum transfer from the proton to the pion is space-like and extrapolate our final results to the regime that is relevant for proton decay. In this way, we obtain estimates for the form factors that show agreement with the state-of-the-art calculations in lattice QCD, if systematic uncertainties are taken into account. Our work is a first step towards calculating more involved proton decay channels where lattice QCD results are not available at present.

scholarly journals Observable proton decay in flipped SU(5)

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Maria Mehmood ◽  
Mansoor Ur Rehman ◽  
Qaisar Shafi
Keyword(s):  
Neutrino Mass ◽  
Gauge Coupling ◽  
Proton Decay ◽  
Type I ◽  
Mass Model ◽  
Intermediate Scale ◽  
Decay Channels ◽  
Proton Lifetime ◽  
Hybrid Inflation ◽  
Neutrino Mass Models

Abstract We explore proton decay in a class of realistic supersymmetric flipped SU(5) models supplemented by a U(1)R symmetry which plays an essential role in implementing hybrid inflation. Two distinct neutrino mass models, based on inverse seesaw and type I seesaw, are identified, with the latter arising from the breaking of U(1)R by nonrenormalizable superpotential terms. Depending on the neutrino mass model an appropriate set of intermediate scale color triplets from the Higgs superfields play a key role in proton decay channels that include p → (e+, μ+) π0, p → (e+, μ+) K0, p →$$ \overline{v}{\pi}^{+} $$ v ¯ π + , and p →$$ \overline{v}{K}^{+} $$ v ¯ K + . We identify regions of the parameter space that yield proton lifetime estimates which are testable at Hyper-Kamiokande and other next generation experiments. We discuss how gauge coupling unification in the presence of intermediate scale particles is realized, and a Z4 symmetry is utilized to show how such intermediate scales can arise in flipped SU(5). Finally, we compare our predictions for proton decay with previous work based on SU(5) and flipped SU(5).

scholarly journals Nucleon distribution amplitudes and proton decay matrix elements on the lattice

2009 ◽  
Vol 79 (3) ◽  
Author(s):  
Vladimir M. Braun ◽  
Meinulf Göckeler ◽  
Roger Horsley ◽  
Thomas Kaltenbrunner ◽  
Yoshifumi Nakamura ◽  
...  
Keyword(s):  
Proton Decay ◽  
Matrix Elements

scholarly journals THE PROBLEM OF NEUTRINO MASSES IN EXTENSIONS OF THE STANDARD MODEL

2001 ◽  
Vol 16 (32) ◽  
pp. 5101-5199 ◽  
Author(s):  
ISABELLA MASINA
Keyword(s):  
Proton Decay ◽  
Fine Tuning ◽  
Neutrino Masses ◽  
Flavor Symmetry ◽  
Mixing Angle ◽  
Grand Unified Theories ◽  
Triplet Splitting ◽  
Fermion Masses ◽  
The Standard Model ◽  
Neutrino Masses And Mixings

We review the problem of neutrino masses and mixings in the context of grand unified theories. After a brief summary of the present experimental status of neutrino physics, we describe how the see-saw mechanism can automatically account for the large atmospheric mixing angle. We provide two specific examples where this possibility is realized by means of a flavor symmetry. We then review in some detail the various severe problems which plague minimal GUT models (like the doublet–triplet splitting and proton-decay) and which force us to investigate the possibility of constructing more elaborate but realistic models. We then show an example of a quasirealistic SUSY SU(5) model which, by exploiting the crucial presence of an Abelian flavor symmetry, does not require any fine-tuning and predicts a satisfactory phenomenology with respect to coupling unification, fermion masses and mixings and bounds from proton decay.

Large right handed rotations, neutrino mixing and proton decay

2000 ◽  
Vol 87 (1-3) ◽  
pp. 318-320 ◽  
Author(s):  
Yoav Achiman ◽  
Carsten Merten
Keyword(s):  
Proton Decay ◽  
Neutrino Mixing

β-delayed proton decay of24Si

2001 ◽  
Vol 63 (2) ◽  
Author(s):  
V. Banerjee ◽  
T. Kubo ◽  
A. Chakrabarti ◽  
H. Sakurai ◽  
Arup Bandyopadhyay ◽  
...  
Keyword(s):  
Proton Decay

Proton decay not seen at predicted rate

Physics Today ◽  
1983 ◽  
Vol 36 (9) ◽  
pp. 20-22
Author(s):  
Bertram M. Schwarzschild
Keyword(s):  
Proton Decay

First measurement of proton decay from a transfer reaction to Na21

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
M. J. Kim ◽  
K. Y. Chae ◽  
S. Ahn ◽  
D. W. Bardayan ◽  
S. M. Cha ◽  
...  
Keyword(s):  
Transfer Reaction ◽  
Proton Decay
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