tag:blogger.com,1999:blog-22973357.post1692012211573368778..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: The inevitable outcomes from basic research - ?Sabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger100125tag:blogger.com,1999:blog-22973357.post-10359725883036727432010-12-23T09:27:16.136-05:002010-12-23T09:27:16.136-05:00Ah, now I’ve got it!
The mason’s plumb line, “|”,...Ah, now I’ve got it! <br />The mason’s plumb line, “|”, and his level line, “—”, meet orthogonally. Surely this is as it should be and how could it be otherwise, but is there any deeper significance here? Is it the lingering trace of some early, elemental twist in nature’s topology?<br />Freeman Dyson ranked gravity as the only “entropy free” form of energy. Translations along the vertical line, Don Fosterhttps://www.blogger.com/profile/04814669413022486958noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-48593974944612661692010-12-12T20:58:24.926-05:002010-12-12T20:58:24.926-05:00This comment has been removed by the author.PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-66278946175448174902010-12-12T20:20:07.367-05:002010-12-12T20:20:07.367-05:00Many of the physicists from LHCf have reunited fro...<i>Many of the physicists from LHCf have reunited from the former SPS experiment UA7, which also focused on forward physics. The LHCf experiment will be simulating cosmic ray collisions nearly 1000 times more energetic than UA7 was able to access. The energy of proton collisions in the LHC will be equivalent to a cosmic ray of 1017 eV smashing into the atmosphere. Therefore, LHCf will use the LHCPlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-26806053609285166602010-12-12T20:15:28.066-05:002010-12-12T20:15:28.066-05:00Might help to understand types of calorimeters and...Might help to understand types of calorimeters and Particle identification detectors used in LHC.<br /><br />Dorigo gives a nice presentation. I <a href="http://eskesthai.blogspot.com/2008/04/calorimetric-views.html" rel="nofollow">recorded them</a> as links. Glast, is now Fermi, so we don't forget.<br /><br />Best,PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-15887544021521054272010-12-12T10:57:29.955-05:002010-12-12T10:57:29.955-05:00Hi Steve,
Right, he doesn't mention SUSY. Bes...Hi Steve,<br /><br />Right, he doesn't mention SUSY. Besides the Higgs, the LHC experiments, esp. ATLAS, looks generally for physics beyond the standard model, not SUSY in particular. Arguably though, SUSY is the most popular of such models, if you count popularity by number of papers written on it, but the LHC is by no means an SUSY-search machine. I can understand that Heuer didn't Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-63173842706776357352010-12-09T19:36:28.689-05:002010-12-09T19:36:28.689-05:00From the Wiki article on Cosmology, a very nice ch...From the Wiki article on Cosmology, a very nice chart includes various cosmologies, including this, the Hindu cosmology, from the Hindu Rigveda (1500-1200 bc)<br /><br /><i>The universe sustains for around 311 trillion and 40 billion years that is 100 years of the cosmic creator Brahma. There is a smaller period of unmanifestation in around 4 billion years that is one day in the life of Brahma. Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-69872708096013632932010-12-09T19:33:42.727-05:002010-12-09T19:33:42.727-05:00This comment has been removed by the author.Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-26546444657733292982010-12-09T18:40:02.445-05:002010-12-09T18:40:02.445-05:00Because I am a layman, does not reduce the underst...<i>Because I am a layman, does not reduce the understanding that I can have, that a scientist may have.</i><br /><br />I hope I didn't give you the impression that I thought less of you than <i>intelligent</i> layman, and nothing wrong with that, eh? Such men have moved mountains. Think: Lincoln, Franklin, and 17-18th century noble dandies with free time and the money to buy lab equipment.<brSteven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-8527913900537816962010-12-09T14:31:00.803-05:002010-12-09T14:31:00.803-05:00This comment has been removed by the author.PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-67450136116462575912010-12-09T14:29:53.689-05:002010-12-09T14:29:53.689-05:00Hi Steven,
Maybe the following will help, and the...Hi Steven,<br /><br />Maybe the following will help, and then I will lead up to a modern version for consideration, so you understand the relation.<br /><br /> Keep Gran Sasso in your mind as you look at what I am giving you.<br /><br /><a href="http://press.web.cern.ch/public/Objects/Research/beamtrajectory-en.gif" title="OPERA’s huge detector, weighing 1800 tonnes, should identify particles PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-51342815186377095532010-12-09T10:44:43.899-05:002010-12-09T10:44:43.899-05:00Would we not be correct to say that unification wi...<i>Would we not be correct to say that unification with the small would be most apropos indeed with the large?</i><br /><br />We would if we knew what the small actually <i>was</i>. But we don't. The LHC will roll back the veil of ignorance greatly. I'm impatient for answers, but patient enough to wait a few years. We shall see said the blind man to the deaf man looking away. <br /><br />Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-76007490959391768432010-12-09T09:21:05.109-05:002010-12-09T09:21:05.109-05:00Steven,
Just to help you out a bit more have a lo...Steven,<br /><br />Just to help you out a bit more have a look <a href="http://www.interactions.org/cms/?pid=1029191" title="A first look at the Earth interior from the Gran Sasso underground laborator" rel="nofollow">here</a>.<br /><br /><i>"We find," Chiao said, "that a barrier placed in the path of a tunneling particle does not slow it down. In fact, we detect particles on the PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-3838124472912147772010-12-09T09:08:03.830-05:002010-12-09T09:08:03.830-05:00Hi Steven
Would we not be correct to say that uni...Hi Steven<br /><br />Would we not be correct to say that <a href="http://eskesthai.blogspot.com/2007/01/man-looking-into-outer-space.html" title="Man Looking into Outer Space" rel="nofollow">unification</a> with the small would be most apropos indeed with the large?<br /><br />Pushing through that veil.<br /><br />My interest with the QGP is well documented, as it presented itself "with an PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-23274799749336760902010-12-09T06:22:00.131-05:002010-12-09T06:22:00.131-05:00Is there not a "physics notion" of this?...<i>Is there not a "physics notion" of this?</i><br /><br />I'm surprised a pro-SuperStringser like yourself embraces BigBounce. Aren't Superstringsers pro-Inflation? Don't they hate BigBouncy? Contradiction?<br /><br />And what OF Inflation? What of Fecund Universes? What of Randall-Sundrum?<br /><br />What if "reality" is something else entirely that nobody has Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-10140294499996106812010-12-08T15:12:48.713-05:002010-12-08T15:12:48.713-05:00Steven,
While you think cosmology being highly sp...Steven,<br /><br />While you think cosmology being highly speculative there is a definite box that cosmology fits into, as a frame of reference. Ya for sure, each their own as to the state of?:)<br /><br />The movement of the cosmos is speculated as from the "false vacuum to the true,( what kind of geometry is this?)" how would you not see this expressing itself if not as somehow PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-59730719669094878952010-12-08T15:02:37.402-05:002010-12-08T15:02:37.402-05:00Bee:The former is the, supposedly, fundamental the...<b>Bee</b>:<i>The former is the, supposedly, fundamental theory, the latter is a simplified model that works with additional assumptions</i><br /><br />Hi Bee, <br /><br />I would most certainly apologize if I have offended.:)<br /><br />I was trying to reduce to the idea, as to what attempts may of been of value toward "discrete versus continuity," based on abstract notions of the PlatoHagelhttps://www.blogger.com/profile/00849253658526056393noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-28075259269424706182010-12-08T11:10:47.291-05:002010-12-08T11:10:47.291-05:00Ah, speculation...
“Have never heard of such a sc...Ah, speculation...<br /><br />“Have never heard of such a scenario. I would guess if you want it to be smooth you need something causing dissipation or some other way to dump energy and momentum.”<br /><br />Yes, I was attracted by the image of the animation, but lack the real understanding of the nature of branes or their dynamics. While puzzling along, I tried to press a notion into a place Don Fosterhttps://www.blogger.com/profile/04814669413022486958noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-39161078238620233152010-12-08T09:59:20.922-05:002010-12-08T09:59:20.922-05:00You're welcome, but I'm far less intereste...You're welcome, but I'm far less interested in Cosmology than those other sub-fields of Physics which can be experimentally verified in the foreseeable future, or barring that, in any future. The simplest questions as you know Phil are often the hardest to answer, and to that end what is most appropo in my opinion is to build up from foundations, a bottom-up approach if you will, rather Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-37649974453935642662010-12-08T07:05:07.474-05:002010-12-08T07:05:07.474-05:00Hi Steven,
Thanks for that pointer to Sean’s post...Hi Steven,<br /><br />Thanks for that pointer to Sean’s posts regarding Penrose’s proposal, as it also giving reference to those two rebuttal papers and the Penrose-Gurzadyan quick response. The thing I find a little disturbing is Sean having assumed a negative position of this proposal while at the same time admittedly stating he not fully comprehending it. <br /><br />Now I wouldn’t have it Phil Warnellhttps://www.blogger.com/profile/15671311338712852659noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-67716178125695788472010-12-08T06:18:32.913-05:002010-12-08T06:18:32.913-05:00Hi Plato,
You shouldn't confuse Loop Quantum ...Hi Plato,<br /><br />You shouldn't confuse Loop Quantum Gravity with Loop Quantum Cosmology. A lot of people would be very pissed of about that. The former is the, supposedly, fundamental theory, the latter is a simplified model that works with additional assumptions. Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-26100444479483537522010-12-08T06:17:01.837-05:002010-12-08T06:17:01.837-05:00Hi Eric,
The colliding brane scenario isn't s...Hi Eric,<br /><br />The colliding brane scenario isn't supposed to tackle the question "where does everything come from?" but be an alternative to inflation or, if you wish, more generally dynamics in the early universe, in that case one which avoids the singularity that is, in GR, kinda troublesome. Best,<br /><br />B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-31998986076350503502010-12-08T05:45:40.225-05:002010-12-08T05:45:40.225-05:00What I'm saying is that I get a deep sense of ...<i>What I'm saying is that I get a deep sense of tranquility from knowing that it's turtles all the way down. Hee hee.</i><br /><br />Yes, but only if they're quantic turtles in proportion to the golden ratio phi with teeny tiny wavelengths. :-)<br /><br />On a lighter note, Assange in is jail.<br /><br />On a bizarre note, Penrose and Gurzadyan are defending their Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-88620169197907149722010-12-08T05:42:29.822-05:002010-12-08T05:42:29.822-05:00This comment has been removed by the author.Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-49760149726134051312010-12-08T03:00:54.425-05:002010-12-08T03:00:54.425-05:00What I'm saying is that I get a deep sense of ...What I'm saying is that I get a deep sense of tranquility from knowing that it's turtles all the way down. Hee hee.Erichttps://www.blogger.com/profile/08213251864943443334noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-74067032660648686152010-12-07T22:15:24.212-05:002010-12-07T22:15:24.212-05:00One thing that troubles me about the string inspir...One thing that troubles me about the string inspired colliding brane scenario is the question of what problem does it really solve? If one accepts that the standard big bang creates a singularity how does the creation of branes, which in turn collided to form our universe, eliminate the logical problem of what created those branes in the first place. <br /><br />At some point in all genesis Erichttps://www.blogger.com/profile/08213251864943443334noreply@blogger.com