Gravity waves could hold key to supersymmetry

( -- "In Geneva," Anupam Mazumdar tells, "there is a big effort to discover supersymmetry particles at the Large Hadron Collider. But that is not the only way to find these particles. We should also be able to see supersymmetry in the sky through the observation of gravitational waves."

Mazumdar, a physicist at Lancaster University in Britain, worked with Alex Kusenko at the University of California, Los Angeles to simulate what kind of frequency distribution would result from the fragmentation of unstable scalar condensate. The two say that a number of devices, including the Advanced Laser Interferometer Gravitational-Wave Observatory (LIGO), the Laser Interferometer Space Antenna (LISA) and the Big Bank Observer (BBO), would be able to detect the gravitational waves they describe in “Gravitational waves from fragmentation of a primordial scalar condensate into Q-balls,” which has been accepted for publication in Physical Review Letters.

Supersymmetry is speculated to go beyond the standard model of physics to introduce particles that solve some of the problems that cannot be solved using only the particles that have been observed thus far. In supersymmetry, the standard particles we are familiar with have superpartners that differ from the standard by half a unit of spin. For example, the superpartners of standard model fermions are s-fermions.

“The gravity wave is fundamental to theory from Einstein,” Mazumdar says. “But we have not yet seen it in the frequencies described. However, primordial inflation is one of the many cosmic sources that could produce these waves.” The gravitational waves described by Mazumdar and Kusenko begin as a condensate formed in the early universe of s-fermions.

“At a certain point,” Mazumdar explains, “the condensate starts oscillating due to the presence of scalar, s-fermion, masses, whose masses are roughly determined by the scale of supersymmetry breaking. Due to the inherent nature of quantum corrections the condensate is not absolutely stable and fragments during the coherent oscillations. The fragmentation process leads to the formation of non-topological solitons, known as Q-balls. Since the fragmentation process is so violent and anisotropic, it excites gravity waves.” These waves, he says, have an amplitude and frequency detectable by LIGO.

Mazumdar says that, while many hope to find evidence of supersymmetry when the LHC is fully operational, it is not the only place where one can look for the signs of supersymmetric particles. Besides, he points out, evidence of supersymmetry may not be found at the LHC. Looking to the cosmos, then, would be another option. This is where the sophisticated cosmological observation devices – especially LIGO – come in. “Our model shows frequencies exactly where LIGO is sensitive,” he says. “We also show a place where the frequency would be distinguishable from binaries, black holes and pulsars, which would also form gravity waves.”

“The frequency we show has a broader spectrum, and its uniqueness would provide evidence of this s-fermion condensate,” he continues. “Such a condensate could have also inflated the primordial universe, while explaining the origin of tiny perturbations in the cosmic microwave background radiation.”

However, Mazumdar admits, it may take some time to detect these waves and take the observations. “We’re hoping to detect these in four to five years at LIGO,” he says. “Scientists may find evidence of supersymmetry at the LHC, but we are hoping to find links to it in cosmology.”

Article reference: Kusenko, Alexander and Anupam, Mazumdar “Gravitational waves from fragmentation of a primordial scalar condensate into Q-balls”

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Nov 05, 2008
Minor nitpick: It should be "gravitational waves" in the title, not "gravity waves". Gravity waves are something very different; see Wikipedia.

Nov 05, 2008
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Nov 05, 2008
When are they going to detect gravity waves?

Nov 06, 2008
Lets get real: SUSY was invented over 30 yrs ago. Over 20 yrs of `Desparately Seeking SUSY'. NOTHING has ever been found.
Indeed, mSSM has grossly failed in the recent B_s switching rate measurements at Fermilab.
CDM-II has found no evidence of SUSY-WIMPS.
Now, in desparation that the LHC will come up dry, they turn to astronomy & `gravitinos'. And failing that, they'll simply raise the bar (aka shell game), and declare that the SUSY breaking scale is merely too high to be seen at LHC.
To date, well over 10,000 papers exploring SUSY theoretically & experimentally, not to mention as papers on super-string theory, critically built on SUSY's veracity. 1000's of grad students, postdox,& professors have built careers on SUSY's back. ALL may come crashing down if contrary evidence surfaces.
There is a helluva lot riding on this monstrously complex theory, with new papers on the arxiv submitted everyday...I predict that soon, LHC chickens will come home to roost for SUSY proponents, and physicists will once again realize that mathematical `beauty' is not any guarantee of physical reality.

Nov 07, 2008
The same is true about (supers)string theories, with the exception, some of these theories are forty years old and they were not just left unconfirmed - but even refused by surprisingly high number of experiments at the moment, they can supply some testable predictions. Which usually cannot.

Nov 07, 2008
Soon an experiment will be done under the names of CERN, DAPNIA and ALPHA, to test the attraction or repulsion of antihydrogen by earth's gravity. If the result is repulsion, the mystery of dark energy is answered. A theory explains the electrical nature of gravity, and there are no gravity waves.

Nov 07, 2008
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Nov 07, 2008
DAPNIA is aware of a theory of gravitational repulsion between matter and antimatter. Matter and antimatter are composed of charged particles. Orbiting particles (electrons or positrons) block electrical fields between nuclei of atoms per Gauss's law. These eclipses causes net electrical forces (gravity).

Nov 09, 2008
What you need and everything you'll feel
Is just a question of the deal
In the eye of the storm you'll see a lonely dove
The experience of survival is the key
To the gravity of love

Nov 13, 2008
If the results of the experiment on antihydrogen is repulsion, gravity has a repulsive force between matter and antimatter. Thw experiment is being done by CERN (ALPHA, AD) abd DAPNIA. This explains dark energy and the mystery of missing antimatter. CERN, Los ALamos Lab. DAPNIA have a theory that details the new theory of gravity, it is electrical in nature.

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