Could dark baryons explain dark matter?
in [Physics]
|
From: Yousuf Khan on 20 Jul 2010 12:49 They are suggesting that instead of being Supersymetric WIMPs, they are Technicolor Technibaryons. Yousuf Khan *** Could dark baryons explain dark matter? "Sarkar is a Professor at the University of Oxford in England. Along with Mads Frandsen, he has been working to show that asymmetric "dark baryons" can be a candidate for cold dark matter. This is a different approach, since dark matter is assumed to be heavy 'supersymmetric' particles that are very weakly interacting. Sarkar and Frandsen suggest though that dark matter could be much lighter, asymmetric (i.e. just particles and no antiparticles) and interact more strongly. Their work is published in Physical Review Letters: "Asymmetric Dark Matter and the sun."" http://www.physorg.com/news198834411.html *** Using the Sun as an experiment for these Dark Baryons: *** Sun's dark matter trap "The work looks at the possibility that dark matter is much lighter than the WIMP particles most dark matter hunters are looking for. Such �heavy� particles are also their own antiparticles, so that when a WIMP meets a WIMP they annihilate each other, making it puzzling that there�s still so much dark matter around. The Oxford team ask: what if, instead of being 100 times the mass of a proton, dark matter particles were only 5 times heavier than a proton but had the same asymmetry - excess of particles over antiparticles? �If it were five times heavier, it would get five times the abundance. That�s what dark matter is,� Subir Sarkar of Oxford University�s Rudolf Peierls Centre for Theoretical Physics, who led the work with Mads Frandsen, told Wired.com's Lisa Grossman. �That�s the simplest explanation for dark matter in my view.� Because these �light� dark matter particles don�t annihilate each other, Subir and Mads explain, they could be hoovered up by the gravity of a star like our Sun and trapped there. Subir comments: �The sun has been whizzing around the galaxy for 5 billion years, sweeping up all the dark matter as it goes.�" http://www.physorg.com/news198221838.html
From: dlzc on 20 Jul 2010 13:57 Dear Yousuf Khan: On Jul 20, 9:49 am, Yousuf Khan <bbb...(a)spammenot.yahoo.com> wrote: > They are suggesting that instead of being Supersymetric > WIMPs, they are Technicolor Technibaryons. > > Yousuf Khan > > *** > Could dark baryons explain dark matter? > "Sarkar is a Professor at the University of Oxford in > England. Along with Mads Frandsen, he has been > working to show that asymmetric "dark baryons" can be > a candidate for cold dark matter. This is a different > approach, since dark matter is assumed to be heavy > 'supersymmetric' particles that are very weakly interacting. > Sarkar and Frandsen suggest though that dark matter > could be much lighter, asymmetric (i.e. just particles and > no antiparticles) and interact more strongly. Their work > is published in Physical Review Letters: "Asymmetric Dark > Matter and the sun."" http://www.physorg.com/news198834411.html > *** > > Using the Sun as an experiment for these Dark Baryons: > > *** > Sun's dark matter trap > "The work looks at the possibility that dark matter is much > lighter than the WIMP particles most dark matter hunters > are looking for. Such heavy particles are also their own > antiparticles, so that when a WIMP meets a WIMP they > annihilate each other, making it puzzling that theres still > so much dark matter around. > > The Oxford team ask: what if, instead of being 100 times > the mass of a proton, dark matter particles were only 5 > times heavier than a proton but had the same asymmetry - > excess of particles over antiparticles? > > If it were five times heavier, it would get five times the > abundance. Thats what dark matter is, Subir Sarkar of > Oxford Universitys Rudolf Peierls Centre for Theoretical > Physics, who led the work with Mads Frandsen, told > Wired.com's Lisa Grossman. Thats the simplest > explanation for dark matter in my view. > > Because these light dark matter particles dont annihilate > each other, Subir and Mads explain, they could be hoovered > up by the gravity of a star like our Sun and trapped there. And take part in nuclear reactions. Baryons means a collection of quarks, complete with strong and weak interactions. > Subir comments: The sun has been whizzing around > the galaxy for 5 billion years, sweeping up all the dark > matter as it goes." http://www.physorg.com/news198221838.html Which if course does not explain its roughly 1 part in 10^14 loss of mass due to radiation of fusion energy and solar wind ejecta. And if these Dark baryons don't do friction, then they won't be "hoovered up". I don't see this as a significant improvement over Dark Matter as something that is impossible to see in the lab, and is still not predicted by any other branch of science. We've found some really amazing collections of quarks, but they are all pretty short-lived... David A. Smith
From: Yousuf Khan on 20 Jul 2010 14:41 On 7/20/2010 11:57 PM, dlzc wrote: > Dear Yousuf Khan: > > On Jul 20, 9:49 am, Yousuf Khan<bbb...(a)spammenot.yahoo.com> wrote: >> Because these �light� dark matter particles don�t annihilate >> each other, Subir and Mads explain, they could be hoovered >> up by the gravity of a star like our Sun and trapped there. > > And take part in nuclear reactions. Baryons means a collection of > quarks, complete with strong and weak interactions. Oh, I don't know, if they are Technibaryons, then they might be made up of "Techniquarks"? >> Subir comments: �The sun has been whizzing around >> the galaxy for 5 billion years, sweeping up all the dark >> matter as it goes.�" > http://www.physorg.com/news198221838.html > > Which if course does not explain its roughly 1 part in 10^14 loss of > mass due to radiation of fusion energy and solar wind ejecta. And if > these Dark baryons don't do friction, then they won't be "hoovered > up". Apparently they do a little friction. > I don't see this as a significant improvement over Dark Matter as > something that is impossible to see in the lab, and is still not > predicted by any other branch of science. We've found some really > amazing collections of quarks, but they are all pretty short-lived... I'm reserving my judgement about this. Yousuf Khan
From: dlzc on 20 Jul 2010 16:15 Dear Yousuf Khan: On Jul 20, 11:41 am, Yousuf Khan <bbb...(a)spammenot.yahoo.com> wrote: > On 7/20/2010 11:57 PM, dlzc wrote: > > > Dear Yousuf Khan: > > > On Jul 20, 9:49 am, Yousuf Khan<bbb...(a)spammenot.yahoo.com> wrote: > >> Because these light dark matter particles dont annihilate > >> each other, Subir and Mads explain, they could be hoovered > >> up by the gravity of a star like our Sun and trapped there. > > > And take part in nuclear reactions. Baryons means a > > collection of quarks, complete with strong and weak > > interactions. > > Oh, I don't know, if they are Technibaryons, then they might > be made up of "Techniquarks"? Unlikely. > >> Subir comments: The sun has been whizzing around > >> the galaxy for 5 billion years, sweeping up all the dark > >> matter as it goes." > >http://www.physorg.com/news198221838.html > > > Which if course does not explain its roughly 1 part in 10^14 > > loss of mass due to radiation of fusion energy and solar > > wind ejecta. And if these Dark baryons don't do friction, > > then they won't be "hoovered up". > > Apparently they do a little friction. > > > I don't see this as a significant improvement over Dark > > Matter as something that is impossible to see in the lab, > > and is still not predicted by any other branch of science. > > We've found some really amazing collections of quarks, > > but they are all pretty short-lived... > > I'm reserving my judgement about this. It is just Dark Matter, with a fancier name. It is still not seen in the lab, and if it does friction, it is obviated by observation. I'm still on the quest... AND thank you for posting this. David A. Smith
From: Yousuf Khan on 21 Jul 2010 01:20
On 7/21/2010 2:15 AM, dlzc wrote: > Dear Yousuf Khan: > > On Jul 20, 11:41 am, Yousuf Khan<bbb...(a)spammenot.yahoo.com> wrote: >> On 7/20/2010 11:57 PM, dlzc wrote: >> >>> Dear Yousuf Khan: >> >>> On Jul 20, 9:49 am, Yousuf Khan<bbb...(a)spammenot.yahoo.com> wrote: >>>> Because these �light� dark matter particles don�t annihilate >>>> each other, Subir and Mads explain, they could be hoovered >>>> up by the gravity of a star like our Sun and trapped there. >> >>> And take part in nuclear reactions. Baryons means a >>> collection of quarks, complete with strong and weak >>> interactions. >> >> Oh, I don't know, if they are Technibaryons, then they might >> be made up of "Techniquarks"? > > Unlikely. I don't know enough about the Technicolor theory to agree or disagree, one way or another. All I remember hearing about it before was that it was an alternative to Supersymmetry back in the 70's or 80's, but had somehow fallen out of favor. Actually, as I remember it, Susy itself had fallen out of favor back then, until it was revived & integrated into String theory, thus giving it the name of Superstring theory. > It is just Dark Matter, with a fancier name. It is still not seen in > the lab, and if it does friction, it is obviated by observation. > > I'm still on the quest... AND thank you for posting this. Well, I'm still a firm believer of the fluidic universe theory. But for those who still believe in Dark matter, this might be interesting to them. I don't see this as an alternative to the entire field of Dark matter, but as an alternative to the current obsession with WIMPs. Other alternatives include Axions, sterile neutrinos, etc. WIMPs are really the Susy/String people trying to put their stake in the ground to lay claim to some kind of a prediction. Yousuf Khan |