Not even decoupling can save minimal supersymmetric SU(5)

By H. Murayama, A. Pierce. 2001

279 citations recorded by the source corpus.

We make explicit the statement that the minimal supersymmetric (SUSY) SU(5) model has been excluded by the SuperKamiokande search for the process $\stackrel{\ensuremath{\rightarrow}}{p}{K}^{+}\overline{\ensuremath{\nu}}.$ This exclusion is made by first placing limits on the colored Higgs triplet mass, by forcing the gauge couplings to unify. We also show that taking the superpartners of the first two generations to be very heavy in order to avoid flavor changing neutral currents, the so-called ``decoupling'' idea, is insufficient to resurrect the minimal SUSY SU(5). We comment on various mechanisms to further suppress proton decay in SUSY SU(5). Finally, we address the contributions to proton decay from gauge boson exchange in the minimal SUSY SU(5) and flipped SU(5) models.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/b4b82c6a450be0d9c15481106725ec2cd409c12f

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Citations in the corpus

F-theory GUT vacua on compact Calabi-Yau fourfolds (2009, background): “This is true in particular for the construction of GUT models based on SU(5) dynamics which hold the remarkable potential to avoid some of the notorious shortcomings [14] that plague purely field theoretic approaches.”
Proton stability in grand unified theories, in strings and in branes (2006, background): “[155] the authors concluded that the triplet mass MT 3.”
Breaking GUT groups in $F$-theory (2008, background): “However in four-dimensional SU(5) models, this is also one of the main sources of tension, as lowering the triplet masses also enhances dimension five proton decay [60, 61].”
GUTs and exceptional branes in F-theory — II. Experimental predictions (2008, background): “For example, the minimal four-dimensional supersymmetric SU(5) GUT with standard Higgs content seems to be inconsistent with present bounds on proton decay [6].”
Origin of the matter-antimatter asymmetry (2003, background): “In fact, the simplest SUSY GUT based on the gauge group SU(5) is almost completely ruled out by the recent Super-Kamiokande bounds (Murayama and Pierce, 2002).”
Large underground, liquid based detectors for astro-particle physics in Europe: scientific case and prospects (2007, unknown): “References for the different models are: (1) [43], (2) [44, 45], (3) [46], (4) [47]–[50], (5) [51]–[54], (6) [55], (7) [56], (8) [57].”
Signatures of long-lived gluinos in split supersymmetry (2004, result): “This increase in the proton lifetime is also in agreement with data[9].”
Lectures on F-theory compactifications and model building (2010, background): “In particular, avoiding dimension 4 and dimension 5 proton decay operators is the key to the phenomenological viability of SU(5) models [80, 81].”