- #1
yanniru
- 107
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Quoting from Lisa Randall’s book, Warped Passages, page 343:
“We have seen that supersymmetry can elegantly protect the hierarchy and guarantee that all the large quantum mechanical contributions to the Higgs particle add up to zero. But, as we saw in Chapter 13, even if supersymmetry exists in nature, it must be broken to explain why we’ve observed particles but not their superpartners”
She goes on to indicate that broken symmetry cannot be correct and suggests that the hierarchy problem (i.e., the 16 orders between the Planck mass scale and the weak force mass scale) could be solved by removing the supersymmetry breaking to a separate brane.
However, there may be another explanation for the lack of detectable superpartners. It seems well established that during the Big Bang when the particles recombined with or annihilated anti-particles, that only a tiny fraction of the original number of particles were left over due to CP violation to become all that we can see in the physical universe. Now perhaps if the number of superpartner particles were exactly equal to the number of superpartner anti-particles, then there would be no leftover superpartners in nature. Then broken supersymmetry would not be required to explain the lack of superpartner detections, and virtual superpartners could have exactly the same properties in mass and charge as virtual particles; thus making the supersymmetric solution of the hierarchy problem almost exact.
Wikipedia suggests that CP violation of the weak force alone accounts for only a tiny fraction of the mass of the universe. So I gather that this is an unsolved problem for matter, and presumably also for the superpartners. Thus complete annihilation of the superpartners is a possibility. Can some of you comment on that possibility? In particular is it a well known possibility or easily forbidden?
Richard Ruquist
“We have seen that supersymmetry can elegantly protect the hierarchy and guarantee that all the large quantum mechanical contributions to the Higgs particle add up to zero. But, as we saw in Chapter 13, even if supersymmetry exists in nature, it must be broken to explain why we’ve observed particles but not their superpartners”
She goes on to indicate that broken symmetry cannot be correct and suggests that the hierarchy problem (i.e., the 16 orders between the Planck mass scale and the weak force mass scale) could be solved by removing the supersymmetry breaking to a separate brane.
However, there may be another explanation for the lack of detectable superpartners. It seems well established that during the Big Bang when the particles recombined with or annihilated anti-particles, that only a tiny fraction of the original number of particles were left over due to CP violation to become all that we can see in the physical universe. Now perhaps if the number of superpartner particles were exactly equal to the number of superpartner anti-particles, then there would be no leftover superpartners in nature. Then broken supersymmetry would not be required to explain the lack of superpartner detections, and virtual superpartners could have exactly the same properties in mass and charge as virtual particles; thus making the supersymmetric solution of the hierarchy problem almost exact.
Wikipedia suggests that CP violation of the weak force alone accounts for only a tiny fraction of the mass of the universe. So I gather that this is an unsolved problem for matter, and presumably also for the superpartners. Thus complete annihilation of the superpartners is a possibility. Can some of you comment on that possibility? In particular is it a well known possibility or easily forbidden?
Richard Ruquist
awking-Blackholes aint so Black.), but, for the Universe that is "actually" in contraction, the super-symmetry (missing) particles appear close to the Big-Bang, as the density of matter is configured and squeezed.