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Topic: Superpartner

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	Discovering the Quantum Universe
		A major obstacle to Einstein’s dream of a unified theory is the clash of the laws of the large with the laws of the small.
		The lightest superpartner is a likely candidate for dark matter, thus perhaps also explaining the structure of the cosmos.
		Linear collider experiments could focus on one type of superpartner at a time, measuring their properties cleanly enough to detect the symmetry of supersymmetry, and to reveal the supersymmetric nature of dark matter.
	interactions.org /quantumuniverse/qu2006/scenarios/scenario_06.html (310 words)

	MSSM
		The symbols for the SM superpartners are the same as for the SM particles, but with an additional tilde.
		To date, no superpartners of the SM particles have been discovered, so superpartner masses must be heavier than those of the SM particles.
		The interaction of superpartners with the SM particles can be obtained from the usual SM gauge and Yukawa interactions by replace two of the SM particles with their superpartners.
	www.krl.caltech.edu /~subZ/content/theory/MSSM/MSSM.html (1629 words)

	Superpartner - Wikipedia, the free encyclopedia
		In this physical theory, it is proposed that every fermion should have a "partner" boson (the fermion's superpartner), and vice versa.
		No superpartners of the Standard Model particles have yet been found because supersymmetry is not an exact unbroken symmetry of nature.
		For particles that are real scalars (such as an axion), there is a fermion superpartner and as well as a second real scalar field.
	en.wikipedia.org /wiki/Superpartner (221 words)

	Supersymmetry (Site not responding. Last check: 2007-10-05)
		The superpartner is a heavy replica of a particle, with one other significant difference.
		For example, the superpartner of an electron (a fermion) is called a selectron (a boson).
		Although superpartners have not yet been observed in nature, they might soon be produced in particle accelerators on Earth.
	www.physics.rutgers.edu /~dube/susy.html (153 words)

	Quantum Universe
		The discovery of supersymmetry is an immediate experimental challenge of particle physics, followed by the exploration of its structure and the properties of the superpartner particles.
		Superpartner masses may be related to the Higgs field; supersymmetry provides a natural dark matter candidate, the neutralino.
		A Linear Collider would measure the properties of the superpartners very precisely, showing that they are indeed the superpartners of known particles; it could study the properties of the lightest superpartner (most likely the neutralino) with great precision.
	www.interactions.org /quantumuniverse/questions/q1.html (524 words)

	Superpartners (Site not responding. Last check: 2007-10-05)
		It is believed that the reason that these particles have not yet been observed is because supersymmetry is a broken symmetry, and as a result the superpartners are heavier than the known elementary particles.
		Unfortunately, current theoretical ideas are insufficient to accurately predict the superpartner masses, though the way in which these particles interact with one another and with the known particles is predicted precisely.
		Even though accurate predictions of the the superpartner masses do not exist, there are three distinct arguments that make qualititative predictions of the masses.
	www.theory.caltech.edu /people/jhs/strings/str121.html (433 words)

	Gaugino - Wikipedia, the free encyclopedia
		In particle physics, a gaugino is the hypothetical superpartner of a gauge boson, as predicted by gauge theory combined with supersymmetry.
		bino is the superpartner of the gauge boson corresponding to weak hypercharge.
		zino is the superpartner of the Z boson.
	en.wikipedia.org /wiki/Gaugino (183 words)

	Supersymmetry - ExampleProblems.com
		Hopefully, by the year 2007 the Large Hadron Collider at CERN should be ready for use, producing collisions at sufficiently high energies to detect the superpartners many theorists expect to see.
		It turns out that none of the particles in the Standard Model can be superpartners of each other, so if supersymmetry is correct there must be at least as many extra particles to discover as there are in the Standard Model.
		If the vacuum happens to be supersymmetric, this would mean superpartners would have the same mass, which is not what we observe.
	www.exampleproblems.com /wiki/index.php/Supersymmetry (2426 words)

	NOVA \| The Elegant Universe \| Joe Lykken \| PBS
		Supersymmetry predicts that for every elementary particle that we've already seen there is a superpartner particle, a heavier particle that is similar to the kinds of elementary particles we already see.
		If that is true, then when we discover superpartner particles we will actually be producing in the laboratory the mysterious dark matter that makes up most of our universe, and that would be a fantastic discovery.
		In supersymmetric theories it is usually the case that the lightest superpartner particle has exactly the characteristics that dark matter has.
	www.pbs.org /wgbh/nova/elegant/view-lykken.html (3430 words)

	NOVA \| Teachers \| Elegant Universe, The \| Glossary \| PBS
		The idea that all elementary matter particles have corresponding superpartner force carrier particles and that all force carrier particles have corresponding superpartner elementary matter particles.
		The theorized superpartners, thought to be more massive than their counterparts, have not yet been observed.
		The study of the properties of geometric figures or solids that demonstrate continuous transformations that are not changed by stretching or bending.
	www.pbs.org /wgbh/nova/teachers/activities/3012_elegant_07.html (924 words)

	Axion - The real meaning from Timesharetalk wikipedia (Site not responding. Last check: 2007-10-05)
		The finding in March 2006 of unexpected minuscule light polarization rotation in strong magnetic fields by the Italian PVLAS experiment may be the first experimental result suggesting the existence of axions, but it should be taken with several caveats.
		In supersymmetric theories the axion has both a scalar and a fermionic superpartner.
		The fermionic superpartner of the axion is called the axino, the scalar superpartner is called the saxion.
	www.timesharetalk.co.uk /wiki.asp?k=Axion (571 words)

	Naturalness and superpartner masses or When to give up on weak scale supersymmetry - Anderson, no (ResearchIndex) (Site not responding. Last check: 2007-10-05)
		Abstract: Superpartner masses cannot be arbitrarily heavy if supersymmetric extensions of the standard model explain the stability of the gauge hierarchy.
		This ancient and hallowed motivation for weak scale supersymmetry is often quoted, yet no reliable determination of this upper limit on superpartner masses exists.
		In this paper we compute upper bounds on superpartner masses in the minimal supersymmetric model, and we identify which values of the superpartner masses correspond to the most natural...
	citeseer.ist.psu.edu /80015.html (334 words)

	Greg Anderson: Research: Selected Publications
		Superpartner masses cannot be arbitrarily heavy if supersymmetric extensions of the standard model explain the stability of the gauge hierarchy.
		In this paper we compute upper bounds on superpartner masses in the minimal supersymmetric model, and we identify which values of the superpartner masses correspond to the most natural explanation of the hierarchy stability.
		Fine-tuning criteria are frequently used to place upper limits on the masses of superpartners in supersymmetric extensions of the standard model.
	physics.neiu.edu /~anderson/research/publications.html (3409 words)

	CERN Courier - mSUGRA celebrates its 20th y - IOP Publishing - article
		In supersymmetry, each particle has a superpartner - a sparticle - with a spin that differs by half a unit.
		The particles and sparticles should have the same mass, for example the mass of a quark should be equal to that of its superpartner, the squark, but this is contrary to observation.
		Since the vacuum energy of the theory is not positive definite, it is possible to fine-tune the vacuum energy to zero (or nearly zero) after the spontaneous breaking of supersymmetry, and so avoid any contradiction with experiment.
	www.cerncourier.com /main/article/main/article/43/7/17 (1203 words)

	[No title] (Site not responding. Last check: 2007-10-05)
		Each normal particle is predicted to have a heavy superpartner which obeys quantum statistics of the opposite sense (fermion <-> boson).
		Supersymmetric partners can't efficiently convert to our form of matter so the lightest superpartner will be stable, just as the electron is stable because it is the lightest charged lepton.
		It is commonly expected that the lightest superpartner will be a neutralino which occurs as the mixed state of the Z
	www.robertrohde.com /classes/phys228/WhatWIMP.htm (282 words)

	Supersymmetry to the rescue?
		Known particles that transmit forces, and their possible superpartners
		In current particle experiments we can't yet see any direct evidence for the existence of superpartners for known elementary particles (there is some indirect evidence, however).
		There is a good chance we could start to see superpartners in future particle experiments.
	superstringtheory.com /experm/exper4.html (204 words)

	CMS physics : Supersymmetry (Site not responding. Last check: 2007-10-05)
		To this day, no superpartners have been observed: SUSY must be a broken symmetry, i.e.
		the superpartners (sparticles) must have masses different than those of their partner particles.
		Despite the doubling of the spectrum of particles, SUSY has many merits: it is elegant; assuming the existence of superpartners with TeV-scale masses, the Strong, Weak and Electromagnetic force strengths become equal at the same energy of ~ 10
	www.lip.pt /~outreach/docs/cms2/p10.htm (196 words)

	Johns Hopkins University Particle Physics susy
		The cancellation of loop corrections with fermion and boson superpartners tames the heierarchy problem in the Standard Model.
		The lightest supersymmetric particle is typically stable and could be responsible for the dark matter observed in the universe.
		Since we do not see mass degenerate superpartners for any known particle state, it is clear that if it exists, SUSY must be a broken symmetry.
	www.pha.jhu.edu /~morris/jhu_hep/susy.html (333 words)

	Individual Talk Listing (Site not responding. Last check: 2007-10-05)
		After the experimental verification of low-energy supersymmetry, one of the most important tasks will be to decipher the mechanism of supersymmetry breaking.
		This will require a precise matching of measured superpartner masses and other observables to the underlying Lagrangian parameters.
		I will present results for the two-loop corrections to the masses of the squarks, the gluino, and the top quark in supersymmetry.
	www.pascos04.neu.edu /Site/AbstractQuery.php?62 (100 words)

	SLAC-PUB-8442 -- The Superpartner Spectrum of Gaugino Mediation (Site not responding. Last check: 2007-10-05)
		SLAC-PUB-8442 -- The Superpartner Spectrum of Gaugino Mediation
		We compute the superpartner masses in a class of models with gaugino mediation (or no-scale) boundary conditions at a scale between the GUT and Planck scales.
		These models are compelling because they are simple, solve the supersymmetric flavor and CP problems, satisfy all constraints from colliders and cosmology, and predict the superpartner masses in terms of very few parameters.
	www.slac.stanford.edu /pubs/slacpubs/8000/slac-pub-8442.html (251 words)

	High Energy Physics for Non-Experts
		•predicts that every SM particle has a superpartner with the same quantum numbers but spin.
		ØMasses of superpartners are to be determined by experiment
		ØSUSY predicts top’s superpartner being potentially the lightest among superquarks
	home.fnal.gov /~pompos/prague/praha2004_files/slide0065.html (65 words)

	Notes MSSM (Site not responding. Last check: 2007-10-05)
		The Minimal Supersymmetric Standard Model (MSSM) is a minimal N=1 supersymmetric model (one [supercharge]?
		It has two Higgs doublets, and one [superpartner]?
		Two Higgs doublets are required because only one would cause triangle-diagram anomalies involving the higgsino, and two are required to create a gauge-invariant superpotential that can give mass to both up-type and down-type fermions.
	mcelrath.org /Notes/MSSM (75 words)

	particles, Antiparticles, and Superpartners
		To get the name of the superpartner, you just need to know wether it is a fermion or a boson.
		For two reason, I chose boson : first, shuman seemed to me a bit too...
		I wanna hang around with as many other superpartner as possible (I am supposed to be a superpartner here).
	www.physicsforums.com /showthread.php?t=42036 (495 words)

	Johns Hopkins University Particle Physics lhc_physics
		One of the most popular alternatives to the Standard Model is a class of models called Supersymmetry.
		Supersymmetry requires that every spin 1/2 fermion have a spin 0 boson superpartner and every spin 1 boson have a spin 1/2 fermion superpartner.
		Supersymmetry also has a rich Higgs boson sector.
	www.pha.jhu.edu /~morris/jhu_hep/lhc_physics.html (161 words)

	Re: Photons p4) What is the Mass of the Superpartner - Photino? (Site not responding. Last check: 2007-10-05)
		Re: Photons p4) What is the Mass of the Superpartner - Photino?
		In Reply to: Photons p1) Energy & Mass posted by kx21 on June 12, 2002 at 20:56:01:
		The Mass of Photino > Minimum Mass wrapped in the Photon emitted from the Sun (Average) = 8.33 * 10^(-30)Kg Copyright 2002 kx21.com
	www.superstringtheory.com /forum/partboard/messages10/110.html (146 words)

	Superpartner [Macchiato Caldo Remix]: Reviews, Discography, Audio Clips, and more \|\|\| Music.com (Site not responding. Last check: 2007-10-05)
		Superpartner [Macchiato Caldo Remix]: Reviews, Discography, Audio Clips, and more
		Search the web for Superpartner [Macchiato Caldo Remix]: Web Pages
		Shop for Superpartner [Macchiato Caldo Remix] at Pricegrabber
	www.music.com /performance/superpartner/2 (77 words)

	Dark Matter - Research Interests Dr. G. Duda
		One promising extension to the Standard Model is the theory of supersymmetry.
		At the barest level, in supersymmetry (SUSY) each fermion in the SM receives a bosonic superpartner, and each boson in the SM receives a fermionic superpartner.
		Basically, it's a fermion-boson symmetry which we add to the Standard Model.
	physics33.creighton.edu /faculty/duda/dark_matter.htm (1159 words)

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