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Topic: Photino


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In the News (Mon 7 Dec 09)

  
  Photino - Wikipedia, the free encyclopedia
A photino is a subatomic particle, the fermion WIMP superpartner of the photon predicted by supersymmetry.
Photinos have a lepton number 0, baryon number 0, and spin 1/2.
With an R-parity of -1 it is a possible candidate for dark matter.
en.wikipedia.org /wiki/Photino   (85 words)

  
 Dark matter
It is expected to be the partner, in the sense of having a complementary spin, of the photon, and is therefore known as a photino.
Photinos that are trapped by the sun actually annihilate in its core.
These high-energy neutrinos, as well as neutrinos produced by photino interactions in the earth, may be detectable in some of the underground detectors that are searching for solar and supernova neutrinos.
astron.berkeley.edu /~mwhite/darkmatter/essay.html   (3291 words)

  
 Neutralino - Wikipedia, the free encyclopedia
In particle physics, the neutralino is a hypothetical particle and part of the doubling of the menagerie of particles predicted by supersymmetric theories.
Since the superpartners of the Z boson ( zino), the photon ( photino) and the neutral higgs ( higgsino) have the same quantum numbers, they mix to form eigenstates of the mass operator, called neutralinos.
Of the weakly-interacting massive particles ( WIMPs) under consideration, a lightest neutralino of 30-5000 GeV is the leading candidate for cold dark matter.
en.wikipedia.org /wiki/Neutralino   (144 words)

  
 rparity
We point out that in the case of an equal squark and photino mass, the R-parity conserving supersymmetry decay vanishes, and hence the squark and leptoquark decays are indistinguishable.
In each figure the top curve is for the case of zero photino mass, the middle middle curve for when the photino mass is 18 GeV, and the bottom curve for a photino mass equal to the squark mass.
We observe, that currently ZEUS is not very sensitive to the photino mass nor is able to significantly distinguish leptoquark and squark limits in an R-parity violating supersymmetry model.
www.phys.ualberta.ca /~gingrich/research/zeus/rparity/rparity.html   (542 words)

  
 mssm
For example, the photino, Higgsino, Z-ino, and gluino are the partners of the photon, Higgs, Z-boson, and gluon respectively.
For example, the photino, Higgsino, and Z-ino can mix into arbitrary combinations called the neutralinos, and the charged W-ino and charged Higgsino combine into particles called charginos.
Once a multiplet structure is chosen, the gauge boson and gaugino couplings are specified by the gauge principle.
socrates.berkeley.edu /~noise/mssm.html   (945 words)

  
 Communicating with non-terminating, alternating value patterns - Information Technology Services   (Site not responding. Last check: 2007-11-04)
I predict that the "photon" as we know it(white light), is 13 potential harmonic particles I call "photinos" travelling in a spiral.
The red photino is at the rear, top-center (largest radius, or wavelength), and at the top-center front is the first UV photino, in +1 vector (time), and with radius 1/2 that of red photino (1 octave up).
This photino would be next to lavender (violet+white) @386nm in the spiral path, and in the vector forward path of red (730nm).
www.physicsforums.com /archive/t-16057_Need_practice_in_Analog/t-42095_Astrophysics/t-51633_T-Duality,_R_vs._!/t-13597_Communicating_with_non-terminating,_alternating_value_patterns.html   (886 words)

  
 879-899   (Site not responding. Last check: 2007-11-04)
Assuming that the gravitino mainly decays into a photon and a photino, we calculate the upperbound on the reheating temperature.
Compared to previous works, we have essentially improved the following two points: (i) the helicity ±(3/2) gravitino production cross sections are calculated by using the full relevant terms in the supergravity lagrangian, and (ii) the high energy photon spectrum is obtained by solving the Boltzmann equations numerically.
On the other hand, requiring that the present mass density of photino should be smaller than the critical density, we find that the reheating temperature have to be smaller than (10
ptp.ipap.jp /cgi-bin/link?PTP/93/879   (392 words)

  
 WG80 Metting, 08/10/98
We remind here that SUSANA is an event generator for the resonant squark production decaying into a quark and a neutralino, followed by the neutralino decay into one lepton and 2 jets (H.Dreiner, J. Butterworh).
The neutralino is assumed to be a pure photino.
Due to the different couplings when the neutralino is not a pure photino, the effect on the cross section is sizeable.
www.desy.de /~eperez/08.10.98.meeting/08.10.98.html   (340 words)

  
 SpaceBattles.com - Culture vs Photino Birds
Well, first off, they only interact with baryonic matter via gravity, therefore, only linegun and displaced mini hole can be used against them.
In a straight fight, it's very hard to say, we didn't see enough of Photino Birds.
Their weapon is stated to be able to penetrate even the best of the Xeelee defense.
forum.spacebattles.com /showthread.php?t=9062   (472 words)

  
 New Limits on the Masses of the Selectron and Photino (ResearchIndex)
Abstract: A study of e + e \Gamma annihilations into final states containing a single energetic photon with no accompanying particles is made at a center of mass energy of 57.8 GeV.
The measured cross section is consistent with expectations from standard model processes and is used to set limits on the masses of the scalar electron and photino particles predicted by supersymmetry theories.
If the photino is assumed to be massless, the 90% confidence level lower limit on the mass of the degenerate...
citeseer.ist.psu.edu /288459.html   (258 words)

  
 [No title]   (Site not responding. Last check: 2007-11-04)
The observed event rate is consistent with Standard Model predictions.
In a version of the supersymmetry (SUSY) model with a massless photino and no cascade decays, we exclude at the 90% confidence level the existence of squarks and gluinos with masses less than 125 GeV/(c**2) and 141 GeV/(c**2) respectively.
The mass limits are lower with other choices of the SUSY parameters.
www-cdf.fnal.gov /physics/preprints/1992-06-0034.txt   (82 words)

  
 gluino.html   (Site not responding. Last check: 2007-11-04)
Such a study might be possible upon the completion of the E871 program.
The R-meson,or glueballino,is a long-lived gluon-gluino bound state arising in a scenario in which the gluino and photino are very light supersymmetric particles.
Interest in this topic has developed in response to the work of Farrar on supersymmetry.and the work of Carlson and Sher on the R meson production cross section.
www.phy.bnl.gov /ags-2000/gluino.html   (127 words)

  
 SpaceBattles.com - The Photino birds vs. the Krikkits   (Site not responding. Last check: 2007-11-04)
SpaceBattles.com - The Photino birds vs. the Krikkits
Debates > The Photino birds vs. the Krikkits
I'd have to look through my copy of Vacuum Diagrams, but I think the supernova the Birds ran into was just a bit of a rude shock, involving lots of deaths.
kier.3dfrontier.com /forums/archive/index.php/t-9883   (258 words)

  
 Re: Elementary Supersymmetry question   (Site not responding. Last check: 2007-11-04)
That is, the photon carries the electromagentic >force.
If you now want to treat the photon for a photino, the outgoing electron also has to be converted to a selectron (ascii art is not enough to draw this).
But there cannot be a vertex with only one ingoing selectron, one outgoing selectron and one photino.
www.lns.cornell.edu /spr/2000-11/msg0029634.html   (268 words)

  
 [No title]   (Site not responding. Last check: 2007-11-04)
C -- Check that the photino is the LSP.
DO 1 i = 1, 7 IF ( msus(i).LE.msus(8)) THEN WRITE (isustr(1),*) ' Photino must be the LSP!' ok =.FALSE.
RETURN ENDIF C C -- Check that photino decay is kinematically allowed.
www.hep.ucl.ac.uk /~twj/susy/version/suschk.f   (114 words)

  
 Re: Could there be new forces found due to SUSY?
You're right to realize that the SUSY theory predicts SUSY force carriers: the photino, wino, bino for the electroweak force, the gluino for the strong force, and the gravitino for gravity.
Photons and photinos both interact with any charged particle.
I'm glad you asked; your question prompted a useful discussion of photino interactions among my labmates.
www.madsci.org /posts/archives/2005-02/1107739001.Ph.r.html   (385 words)

  
 CHAPTER THREE
collisions taking place in a plasma matrix, between two photinos or two antiphotinos, whereby all their spin energy is transformed into vibrational kinetic thermal energy, shall lead to the formation of two noumena:
This can only take place in the Plasma State where EACH such an interaction entailing the transformation of one full turn of spin into kinetic energy is NOT followed by the restoration of its spin as happens in the ether.
The compressed photinos and antiphotinos, becoming quarks [16] and anti quarks, by virtue of their becoming spatially confined in a compound particle.
sourial.com /chapter3.htm   (8814 words)

  
 CHAPTER TWO
is drawn smaller than the photino and antiphotino although they are all in their ground energy state, because while the photino and antiphotino have compression and spin energy, the noumenon has ALL its energy as compression.
Both of which define the "Antiparticle", the anti-photino: the exact opposite of the photino in its orientation and motion in all planes at all times.
Each photino is adjacent to an antiphotino in an alternating fashion, in any one of The Three Cardinal Planes.
sourial.com /chapter2.htm   (9750 words)

  
 Amazon.com: Books: Vacuum Diagrams   (Site not responding. Last check: 2007-11-04)
SIPs: photino birds, quantum nonlinearity, her cilia, logic pool, crash scar ( more)
photino birds, quantum nonlinearity, her cilia, logic pool, crash scar, quantum inseparability, translator box, hands into the mittens, quantum functions, ice dwarf, attention foci, zap gun, data desks, glowing floor, two gee, quantum wave functions, cow trees, exotic matter, vortex lines, cosmic string, star core
Photino Victory, Qax Occupation, End Wars, Solar System, Eighth Room, Sugar Lump, Bolder's Ring, Great Attractor, Kevan Scholes, Sink Ambassador, South Pole, Uncertainty Principle, Jim Bolder, Comms Officer, Baked Alaska, Holism Ark, Big Bang, Chao Meng-Fu Crater, Port Sol, Quantum Sea, Michael Poole, Bill Dzik, Caloris Basin, Core Wars, Jack Raoul
www.amazon.com /exec/obidos/tg/detail/-/0061059048?v=glance   (1663 words)

  
 AGS Experiment 935 Information   (Site not responding. Last check: 2007-11-04)
E935 is an experiment at AGS B5 line to search for the supersymmetry-based R
hadron in terms of a decay channel involving a photino and two charged pions with a sensitivity in the product of production cross section and branching fraction of 5 x 10
A positive signal could be a candidate for a supersymmetric particle.
wmheg.physics.wm.edu /e935/info.html   (103 words)

  
 2. Supersymmetry
Supersymmetry postulates that for every Standard Model particle there is a corresponding supersymmetric particle (or ``sparticle'') which has a spin that is different by 1/2 unit.
For example, the spin-1/2 electron will have a spin-0 supersymmetric partner called a ``selectron'', and the spin-1 photon has a spin-1/2 partner named a ``photino''
The existence of particles with exactly the same properties as the Standard Model particles, except for different spins, helps solve the divergence problem mentioned in the last section.
www-hep.colorado.edu /~nlc/SUSY_Wagner/susy/node2.html   (818 words)

  
 Citebase - R-parity Violating Radiative Photino Decay in Supersymmetric Models
Users are cautioned not to use it for academic evaluation yet.
Citation coverage and analysis is incomplete and hit coverage and analysis is both incomplete and noisy.
R-parity Violating Radiative Photino Decay in Supersymmetric Models
citebase.eprints.org /cgi-bin/citations?id=oai:arXiv.org:hep-ph/9910482   (705 words)

  
 quarks and leptons, squarks and sleptons
This will then constitute a doubling of the known constituents of matter analogous to what happened in the twentieth century when anti-particles were discovered.
There is still a possibility that the gluinos and photino of supersymmetry may be at relatively low mass (below that of the proton).
Many experiments have been done that could have seen direct evidence for a light gluino.
bama.ua.edu /~lclavell/pages/periodictable.html   (649 words)

  
 [No title]   (Site not responding. Last check: 2007-11-04)
Date: Mon, 2 Nov 1998 06:43:34 GMT (166kb) Title: Complete analysis of photino-mediated lepton flavor violaitons in generalized supersymmetric models Authors: Yeong Gyun Kim, Pyungwon Ko, Jae Sik Lee, and Kang Young Lee Comments: 25 pages, LaTeX, 5 figures, 5 tables, to appear in Phys.
D Report-no: KAIST-TH 10/98, SNUTP 98-007 Journal-ref: Phys.Rev. D59 (1999) 055018 \\ We consider lepton flavor violations (LFV) mediated by photino as a result of the nondiagonal slepton mass matrices in general supersymmetric models.
Most of these decays are expected to occur with small branching ratios far below the current or future experimental search limits.
www.thphys.uni-heidelberg.de:8080 /cgi-bin/abstracts/hep-ph:9811211   (125 words)

  
 SpaceBattles.com - Xeelee questions   (Site not responding. Last check: 2007-11-04)
Xeelee are at war with a race of darkmatter beings called the Photino Birds.
The Photino Birds want to make every star in the universe a brown dwarf or similar.
The opposite also being true, the Photino Birds can't survive without doing this.
kier.3dfrontier.com /forums/archive/index.php/t-16667.html   (158 words)

  
 Astro Weasel' s Space Club: Tadpole   (Site not responding. Last check: 2007-11-04)
The eruption had hurled the thing out of its normal environment, deep down in the flaming atmosphere of the sun...
More recently, Stephen Baxter wrote in his 1994 novel Ring about photino birds, creatures that lived within suns, and could even fly between them:
The birds soared past and around her, tiny planets of dark matter racing through their tight solar orbits.
astrospace.blogspot.com /2005/03/tadpole.html   (473 words)

  
 DATAGUIDE database   (Site not responding. Last check: 2007-11-04)
The number appearing at the left of each line is the number of papers involving the reaction.
_____1__GAUGINO --> MU- NUMUBAR PHOTINO + MU+ NUMU PHOTINO
_____1__GAUGINO --> TAU- NUTAUBAR PHOTINO + TAU+ NUTAU PHOTINO
wwwppds.ihep.su:8001 /7-dE.html   (62 words)

  
 CATHOLIC ENCYCLOPEDIA: Vigilius
His writings show that he took an active part in the controversies which were then agitating the Eastern Church.
A dialog, "Contra Arianos, Sabellianos, et Photinianos; Athanasio, Ario, Sabellio, Photino et Probo judice, interlocutoribus", is undoubtedly the work of his hands.
He also wrote a treatise, "Contra Eutychetem", in five books, which contains a valuable summary of the arguments against Eutychianism.
www.newadvent.org /cathen/15427a.htm   (297 words)

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