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gravity is left-handed or right?.

Gravity is left-handed? One answer might be a clue to a long-sought theory of quantum gravity - and could be within reach by 2013. The
general relativity describes the actions of gravity on large scales. For small scales however, a theory of gravity quantum incorporating quantum mechanics is needed. But physicists must first understand the gravitons, hypothetical quantum particles that mediate the gravitational force. These probably come in a variety of left hand and right hand at first, the spin of the particle would be aligned with the direction of motion in the end, the spin would be the opposite.
general relativity does not distinguish between right and left, so one might expect that gravity is transmitted by the two varieties. But the quantum world can play favorites. When it comes to ghostly particles known as neutrinos , for example, the weak force only interacts with a variety of left hand.
gravitons To find out if they fall into the "ambidextrous" field of general relativity or quantum asymmetry show like a neutrino, and Dionigi Benincasa João Magueijo, Imperial College London suggest looking in the cosmic microwave background , the afterglow of the Big Bang . During the inflation, more rapid expansion in the light of the early universe, powerful gravitational waves may have waved the spacetime , polarizing the photons from the CMB in a revealing picture.


the ESA's Planck satellite will form a detailed picture of the polarization of the CMB and the data were issued in 2013, according to 2 physical data in a new study will help determine whether the hypothetical gravity is mediated by gravitons derecha.Crédito left hand or ESA.

The couple estimates that if the severity depended on the left hand or right hand gravitons that would have distorted the pattern of polarization in an obvious way. Moreover, inflation would have extended these effects to astronomical proportions, making them readily visible to astronomers and Benincasa Magueijo writes in an analysis that appears in Physical Review Letters. The Planck telescope European Space Agency will form an image of the CMB polarization and data will be released in 2013.
A theory called loop quantum gravity , an attempt to unite quantum mechanics and general relativity, and suggests that asymmetry might be embedded deeply into the laws of the universe and that this should make the seriousness out of hand left. Evidence of gravitons
left hand on the CMB would be "a triple discovery," says Lee Smolin of the Perimeter Institute in Waterloo, Ontario, Canada, who has worked with Magueijo and Benincasa on the subject. "Inflation is confirmed, that gravity is quantum mechanical and there is a left-right asymmetry in quantum gravity."




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http://www.newscientist.com/article/mg20928024.100-gravitys-bias-for -left-may-be-writ-in-the-sky.html