Search for proton decay into<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mo>+</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>in the IMB-3 detector

Becker‐Szendy, R.; Bratton, C. B.; Cady, D. R.; Casper, D.; Claus, R.; Crouch, M. F.; Dye, S. T.; Gajewski, W.; Goldhaber, M.; Haines, T. J.; Halverson, P. G.; Jones, T. W.; Kiełczewska, D.; Kropp, W. R.; Learned, J. G.; LoSecco, J. M.; McGrew, C.; Matsuno, S.; Matthews, J. A. J.; Mudah, M. S.; Price, L. R.; Reines, F.; Schultz, J.; Sinclair, D.; Sobel, H. W.; Stone, J. L.; Sulak, L.; Svoboda, R.; Thornton, G.; Velde, J. C. van der

doi:10.1103/physrevd.42.2974

Cited by 47 publications

(48 citation statements)

References 5 publications

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“…The single ring events have been analysed within the proton decay interpretation where it is argued that, if the proton decays into a positron and two neutrinos with a lifetime of (PP e> ):4;10 years, then the excess observed electron events could be due to proton decay events [8]. The lifetime for this particular decay mode of the proton [9] is consistent with the present limit [10] for the expected dominant decay mode of the proton (PPe> °)' 5;10 yr. The possibility that this particular decay mode might dominate over other usual decay modes was considered earlier on general grounds [11][12][13] where it was pointed out that it is difficult to have light neutrinos in the final decay product.…”

Section: Introductionmentioning

confidence: 67%

“…1 . If the symmetry group G .1 is embedded in the unified group SO(10) then this field is contained in a 54-plet of SO (10), which is required to break the symmetry of the large group. The mixing of the field with can then give a mass matrix which may be fine tuned to give only a light color triplet field.…”

Section: A General Left-right Symmetric Potentialmentioning

confidence: 99%

“…For simplification of notation we write M A for M .1 in this section. We embed the Pati-Salam group G .1 into a larger GUT group SO (10). The SO(10) symmetry is broken by a 54-plet of Higgs field at the scale M 3 .…”

Section: B"mentioning

confidence: 99%

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A model for the three lepton decay mode of the proton

Brahmachari

O’Donnell

Sarkar

1997

Zeitschrift f�r Physik C Particles and Fields

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An extension of the left-right symmetric model has been constructed which gives in a natural way the three lepton decay modes of the proton which have been suggested as an explanation for the atmospheric neutrino anomaly. We write down the potential which after minimization gives the proper choice of the Higgs spectrum. With this Higgs spectrum we then study the evolution of the gauge coupling constants and point out that for consistency one has to include effects of gravity.

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Section: Introductionmentioning

confidence: 67%

Section: A General Left-right Symmetric Potentialmentioning

confidence: 99%

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A model for the three lepton decay mode of the proton

Brahmachari

O’Donnell

Sarkar

1997

Zeitschrift f�r Physik C Particles and Fields

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“…The first is the constraint that the proton lifetime be greater than the observed bound, 7p > 5.5 X lo3' yr [17]. A calculation of the lifetime [18] gives so we must require M, k 1.1 X 10'' GeV.…”

Section: Gauge-coupling Evolution and Intermediate Scalesmentioning

confidence: 99%

Fermion masses in SO(10)

Jungman

1992

Phys. Rev. D

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Yukawa-coupling-constant unification together with the known fermion masses is used to constrain SO(10) models. We consider the case of one (heavy) generation, with the tree-level relation m b = m ,, calculating the limits on the intermediate scales due to the known limits on fermion masses. This analysis extends previous analyses which addressed only the simplest symmetry-breaking schemes. In the case where the low-energy model is the standard model with one Higgs doublet, there are very strong constraints due to the known limits on the top-quark mass and the r-neutrino mass. The two-Higgs-doublet case is less constrained, though we can make progress in constraining this model also. We identify those parameters to which the viability of the model is most sensitive. We also discuss the "triviality" bounds on m, obtained from the analysis of the Yukawa renormalization-group equations. Finally we address the role of a speculative constraint on the T-neutrino mass, arising from the cosmological implications of anomalous B + L violation in the early Universe. PACS numberk): 12.10.Dm, 12.15.Ff 4004 0 1 9 9 2 The American Physical Society

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“…Such events were of interest primarily as the background for proton decay. Both water Cherenkov detectors [10,11] and segmented iron calorimeters [4,12,13,14] were used.…”

Section: Introductionmentioning

confidence: 99%