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Topic: Flipped SU(5)

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	Flipped SU(5) - Wikipedia, the free encyclopedia
		The Flipped SU(5) model is a GUT theory which states that the gauge group is [ SU(5) × U(1)
		The left-handed antifermions are flipped, hence the name flipped SU(5).
		The hypercharge Y/2 is a linear combination (sum) of the
	en.wikipedia.org /wiki/Flipped_SU(5) (242 words)

	Flipped SU(5) (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-11)
		It was like a switch had been flipped.
		The Flipped SU(5) model is a GUT theory which states that the gauge group is [ SU(5) × U(1) ]/ and the fermions form three families, each consisting of the representations, 10
		This includes right-handed neutrinos, which are known to exist because of observed neutrino oscillations.
	publicliterature.org.cob-web.org:8888 /en/wikipedia/f/fl/flipped_su_5_.html (173 words)

	Grand unification theory Summary
		This is a significant observation, as a generic combination of chiral fermions which are free of gauge anomalies will not be unified in a representation of some larger Lie group without adding additional matter fields.
		They are the minimal left-right model, SU(5), flipped SU(5) and the Pati-Salam model.
		Some GUT theories like SU(5) and SO(10) suffer from what is called the doublet-triplet problem in that these theories predict that for each electroweak Higgs doublet, there corresponds a colored Higgs triplet field with a very small mass (small, meaning many orders of magnitude smaller than the GUT scale here).
	www.bookrags.com /Grand_unification_theory (3547 words)

	Triangulation Algorithms and Data Structures
		Triangle was originally written using Guibas and Stolfi's quad-edge data structure [10] (without the Flip operator), then rewritten using a triangle-based data structure.
		The quad-edge data structure is popular because it is elegant, because it simultaneously represents a graph and its geometric dual (such as a Delaunay triangulation and the corresponding Voronoï diagram), and because Guibas and Stolfi give detailed pseudocode for implementing the divide-and-conquer and incremental Delaunay algorithms using quad-edges.
		Constrained edges are edges that may not be removed in the process of improving the quality of a mesh, and hence may not be flipped during incremental insertion of a vertex.
	www-2.cs.cmu.edu /~quake/tripaper/triangle2.html (1518 words)

	EnergyStorm - Unifying flipped SU(5) in five dimensions (via CobWeb/3.1 planetlab2.cs.unc.edu) (Site not responding. Last check: 2007-10-11)
		Abstract: It is shown that embedding a four-dimensional flipped SU(5) model in a five-dimensional SO(10) model preserves the best features of both flipped SU(5) and SO(10).
		The missing partner mechanism, which naturally achieves both doublet-triplet splitting and suppression of d=5 proton decay operators, is realized as in flipped SU(5), while the gauge couplings are unified as in SO(10).
		The masses of down quarks and charged leptons, which are independent in flipped SU(5), are related by the SO(10).
	www.energystorm.us.cob-web.org:8888 /Unifying_Flipped_Su_5_In_Five_Dimensions-r50566.html (128 words)

	[No title]
		He is a co-developer of one of the better-accepted unified field theories, known as the flipped SU(5) model.
		In the past several years, Hagelin has worked on integrating the SU(5) model, which does not include gravity, into the four-dimensional heterotic superstring model, which is currently considered one of the better prospects for a grand unified `theory of everything.' Everything, in this case, may even include human consciousness.
		Hagelin often lectures on SU(5) and other unified field theories to both scientific and nonscientific audiences, mixed in with a lengthy discussion of TM.
	minet.org /TM-EX/Fall-92 (6547 words)

	Aspects of the flipped unification of strong, weak and electromagnetic interactions - Abstracts of Dissertations of ...
		Aspects of the flipped unification of strong, weak and electromagnetic interactions.
		We explore phenomenological aspects of a recently- proposed Flipped SU(5) x U(1) supersymmetric GUT which incorporates an economical and natural mechanism for splitting Higgs doublets and triplets, and can be derived from string theory.
		Using experimental values of sin squared theta sub{W} and the strong QCD coupling, we estimate the grand unification scale M sub{G}, where the strong and weak coupling strengths are equal, and the superunification scale M sub{SU}, where all couplings are equal.
	www.mum.edu /library/abstracts/kelley (688 words)

	Hagelin Book
		The super-string theory is the physicists' model for the "Theory of Everything." Since Einstein's day, mathematical inconsistencies had kept these string models grounded.
		After several years of thinking about the problem, he wrote down his theory, called "Flipped SU(5) Grand Unified Theory" (GUT).
		Hagelin's theory was derived from super-string theory and linked super-string models to the standard model of physics, which is our everyday understanding of how life fits together.
	fairfield.freehosting.net /97nov/hagelin.html (1367 words)

	SO(10) (physics) - Wikipedia, the free encyclopedia
		Before SU(5), Howard Georgi found that all the matter contents are incorporated into a single representation, spinorial 16 of SO(10).
		If the hypercharge is contained within SU(5), this is the conventional Georgi-Glashow model.
		Depending on the direction of this linear combination, we can break the symmetry to SU(5)×U(1), the Georgi-Glashow model with a U(1) (diag(1,1,1,1,1,-1,-1,-1,-1,-1)), flipped SU(5) (diag(1,1,1,-1,-1,-1,-1,-1,1,1)), SU(4)×SU(2)×U(1) (diag(0,0,0,1,1,0,0,0,-1,-1)), the minimal left-right model (diag(1,1,1,0,0,-1,-1,-1,0,0)) or SU(3)×SU(2)×U(1)×U(1) for any other nonzero VEV.
	en.wikipedia.org /wiki/SO(10)_(physics) (426 words)

	WomenOf.com : Voice of a New Generation
		Born in Pittsburg, PA, Hagelin went to Dartmouth and received a doctorate in quantum physics from Harvard University in 1981.
		His Ph.D. earned him a job at Europe's most prestigious physics lab and at Stanford, where he coauthored an important theory on "Flipped SU(5) Supersymmetric Grand Unification." He has received support by the National Science Foundation and has published in prestigious physics journals.
		Such is not the description of your average practitioner of transcendental meditation, one might say.
	www.womenof.com /Articles/ai103000.asp (806 words)

	Elementary Particles Presented
		Flipped SU(5) proposes the existence of the crypton
		Normally we live in the 16 of SO(10), and like to break it down to SU(5), which we understand a little better.
		The only GUT that is ruled out atm, is non SUSY SU(5), b/c of proton decay bounds.
	www.physicsforums.com /showthread.php?p=328969 (3099 words)

	EMRR's Review: Art Applewhite Rockets - Delta Flying Saucer 18mm (6")
		The saucer boosted straight up with no wobble, flipped over at end of boost, and floated softly down to earth with no wobble and little drift.
		The second flight was in a wide open field with 10 mph winds, again with a B6-0.
		The model flipped over after boost and float safely to earth, again with no wobble and little drift.
	www.rocketreviews.com /reviews/kits/aaw_delta_18mm_gold.html (1643 words)

	Citebase - Flipped SU(5) Predicts δ T/T
		We discuss hybrid inflation in supersymmetric flipped SU(5) model such that the cosmic microwave anisotropy δ T/T is essentially proportional to (M /M
		The magnitude of M determined from δ T/T measurements can be consistent with the value inferred from the evolution of SU(3) and SU(2) gauge couplings.
		In other words, one could state that flipped SU(5) predicts (more precisely `postdicts') δ T/T.
	citebase.eprints.org /cgi-bin/citations?id=oai:arXiv.org:hep-ph/0510105 (148 words)

	Parameter Space of Finite-Order Flat Directions for String-Derived Flipped SU(5) and Optical Unification Models (via ... (Site not responding. Last check: 2007-10-11)
		As the most developed string-derived GUT model, flipped SU(5) has achieved significant phenomenological success.
		All-Order flat directions canceling the Fayette-Iliopoulos D-term inherent in realistic heterotic string models have been systematically investigated prior for both the flipped SU(5) and Optical Unification models.
		For both models, the phenomenology of all-order flat directions was found not to be as viable as that of some specific finite-order flat directions.
	flux.aps.org.cob-web.org:8888 /meetings/YR04/APR04/baps/abs/S320013.html (201 words)

	NSDL Metadata Record -- $B \to X_{s} \tau^{+} \tau^{-}$ in the flipped SU(5) model (via CobWeb/3.1 ... (Site not responding. Last check: 2007-10-11)
		NSDL Metadata Record -- $B \to X_{s} \tau^{+} \tau^{-}$ in the flipped SU(5) model (via CobWeb/3.1 planetlab2.cs.unc.edu)
		$B \to X_{s} \tau^{+} \tau^{-}$ in the flipped SU(5) model
		In contrast to other works dealing with such a topic, our study has included the contributions of the neutral higgs bosons through penguin diagrams to this process under the context of supersymmetry.
	nsdl.org.cob-web.org:8888 /mr/128021 (69 words)

	Citebase - Distinguishing between SU(5) and flipped SU(5)
		We study in detail the d=6 operators for proton decay in the two possible matter unification scenarios based on SU(5) gauge symmetry.
		The dependence of the branching ratios for the two body decays on the fermion mixing is presented in both cases.
		Users are cautioned not to use it for academic evaluation yet.
	citebase.eprints.org /cgi-bin/citations?id=oai:arXiv.org:hep-ph/0409095 (133 words)

	Digitale Hochschulschriften der LMU - Compactifications of the Heterotic String with Unitary Bundles
		These can be viewed, by S-duality, as the generalisation of toroidal magnetized $D9$-branes to non-abelian braneworlds on genuine Calabi-Yau manifolds.
		We finally discuss the construction of realistic vacua with flipped $SU(5)$ GUT and MSSM gauge group within the $E_8 \times E_8$ framework, based on the embedding of line bundles into both $E_8$ factors.
		Some of the appealing phenomenological properties of this stringy realisation of flipped $SU(5)$ models, in particular stability of the proton, are discussed.
	edoc.ub.uni-muenchen.de /archive/00005539 (497 words)

	PhysOrgForum Science, Physics and Technology Discussion Forums -> bubbles
		Plenty of people think Hawking is wrong about a lot of things, despite him being very famous and having contributed a lot to relativity and quantum theory.
		Besides, Feynman died in 1988, only just after the first string theory revolution, he didn't live to see the second string theory revolution, the development of flux compactification or important results linking string theory to known theories (including ones he helped create) like QCD via things like Flipped SU(5) theory.
		It's linked to QCD, as I just mentioned to Nick via Flipped SU(5) theory, it's got relativity, supersymmetry and puts quantum fields into much better standing for computations.
	forum.physorg.com /index.php?showtopic=6940 (2167 words)

	Implications of anomalous U(1) symmetry in unified models: the flipped SU(5) × U(1) paradigm (Site not responding. Last check: 2007-10-11)
		Implications of anomalous U(1) symmetry in unified models: the flipped SU(5) × U(1) paradigm
		We construct all possible viable fermion mass textures and give various examples of effective low-energy models which are distinguished from each other by their different predictions for B-, L- and R-violating effects.
		In particular, reselling and systematic downloading of files is prohibited.
	stacks.iop.org /1126-6708/2000/i=05/a=001 (362 words)

	Astro-ph for busy people (Site not responding. Last check: 2007-10-11)
		Cryptons are metastable bound states of fractionally-charged particles that arise generically in the hidden sectors of models derived from heterotic string.
		We study their properties and decay modes in a specific flipped SU(5) model with long-lived four-particle spin-zero bound states called {\it tetrons}.
		We show that the neutral tetrons are metastable, and exhibit the ninth- and tenth-order non-renormalizable superpotential operators responsible for their dominant decays.
	www.camk.edu.pl /~gwar/astro-ph/2004.03.17.html (7357 words)

	Astrophysics authors/titles "new"
		The advantages of Flipped SU(5) over conventional Supersymmetric GUTs, like SU(5), are discussed.
		Recent values of the strong coupling at M_Z, sin-squared theta-Weinberg, g-2 of the muon, and the lower limit on the proton lifetime for the (K+, anti-neutrino) mode point directly to Flipped SU(5) as the simplest way to avoid potential pitfalls.
		It is shown that "F(lipped)-enomenology" accomodates easily all presently available low-energy data, favoring a rather "light" supersymmetric spectrum while yielding the right amount of Cold Dark Matter and a proton lifetime in the ((e+/muon+), pi-zero) mode which is beyond the present experimental limit yet still possibly accessible to a further round of experiments.
	www.tat.physik.uni-tuebingen.de /~weth/astro-ph/astro-ph_021113.html (7451 words)

	WebLife: A Reason to Vote: Notes
		Flipped SU(5)xU(1) Revitalized, Physics Letters 194B (1987) 231, with I. Antoniadis, J. Ellis and D.V. Nanopoulos.
		The paper shows a previously all-but-overlooked symmetry group, SU(5)xU(1), is by far the most viable unifying symmetry principle needed to link the fundamental forces.
		The resulting theory, known as Flipped SU(5), solved severe technical problems of previous Grand Unified Theories (GUTs), including the so called "gauge hierarchy problem", and sparked a renaissance of GUT model building and new experimental searches, some of which are still under way.
	www.weblife.org /vote/notes.html (7590 words)

	dallasobserver.com - News - Good Vibrations
		Eventually, he sought to extend the Flipped SU(5) theory to human consciousness, thus attempting to bring the "Maharishi effect" into the fold of quantum physics.
		The move appalled Hagelin's former scientific colleagues and shattered the remains of his mainstream credibility.
		"It's absolutely ludicrous to say that TM has anything to do with flipped SU(5)." John Ellis of CERN also told Hagelin to knock it off with his "flaky" assertions, to no effect.
	www.dallasobserver.com /issues/2000-10-05/feature2_full.html (4946 words)

	Physics Letters. Section B, 1999; 464 (1-2) (Site not responding. Last check: 2007-10-11)
		Currents of arbitrary spin in AdS3 / Prokushkin, S F / Vasiliev, M A
		Higgs mass textures in flipped SU(5) / Ellis, J / Leontaris, G K / Rizos, J
		Improved heavy quark potential at finite temperature from anti-de Sitter supergravity / Naik, S
	www.ucm.es /BUCM/compludoc/W/10001/03702693_8.htm (263 words)

	Historical Contingency \| Musings
		Indeed, today it’s a model builders dream becoming true !
		We already had all these nice things like SU(5), SO(10), E6 grand unification, left-right symnmetric models, Pati-Salam models, flipped SU(5) models, all with minimal or non-minimal Higgs sector, then composite models incl technicolor, plus supersymmetry and then a mixture of all of that !
		However, after 25 years of model building, things almost seemed to have gotten boring - but fortunately, we now have extra dimensions at our disposal - we can now repeat all of this but now in 5 and 6 dimensions !
	golem.ph.utexas.edu /~distler/blog/archives/000263.html (793 words)

	Why Carrie Will Win - Achenblog
		May 26, 2005 08:56 AM So, Stunned: You're telling us you've never heard of unipolar and bipolar stepper motors?
		[joke tag]) Personally, I'd love it if Joel would address Supersymmetric Flipped SU(5) Grand Unified Field Theory.
		Perhaps that would be a good candidate for the next Dumb Tom Question.
	blog.washingtonpost.com /achenblog/2005/05/why_carrie_will_win.html (2514 words)

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