tag:blogger.com,1999:blog-22973357.post7712674668805494267..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: How the LHC may spell the end of particle physicsSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger143125tag:blogger.com,1999:blog-22973357.post-49859344068245513102019-07-24T07:18:33.075-04:002019-07-24T07:18:33.075-04:00lol. pretty technical. thank you. Succinct. Helpfu...lol. pretty technical. thank you. Succinct. Helpful. Good search terms. Hope to be able to connect this to my present quandry re what makes pure scalar different. Wavefunction is comprised of scalar, vector, axial vector,... Why quadratic divergence for scalar and not the higher dimensional components? Why no quadratic divergence for the pseudoscalar?<br />peter cameronhttps://www.blogger.com/profile/03250964174803903885noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-3919608602387114392019-07-23T23:41:19.418-04:002019-07-23T23:41:19.418-04:00The Lagrangian has mass dimension 4, the Higgs-fie...The Lagrangian has mass dimension 4, the Higgs-field has 1, meaning you need an m^2 in front of the \phi^2 to get the dimension right. You know the dimension of the Higgs-field from the kinetic term. Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-41015243736040803982019-07-23T16:03:14.243-04:002019-07-23T16:03:14.243-04:00Please, can someone explain the requirement that i...Please, can someone explain the requirement that it is mass^2 rather than mass that appears in the Higgs term of the Lagrangian? What is it about pure scalar particle that causes this to be true? It seems non-physical. Energy units are [kg-m^2/s^2]. Throwing an extra [kg] into the Higgs term makes the rest of that term ugly, very unnatural. So far I've no success in trying to track this down.peter cameronhttps://www.blogger.com/profile/03250964174803903885noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-44321976694777171502019-03-15T09:20:41.911-04:002019-03-15T09:20:41.911-04:00The real problem lies in the unfulfilled promises....The real problem lies in the unfulfilled promises. I don't think any theorist made those promises in bad faith, but they should at least refrain now from making the same promises while simply rehashing the very same flawed arguments. We cannot continue to believe that politicians will be easily fooled over and over again.George Rupphttps://www.blogger.com/profile/09889362076009387449noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-61137663087915271402019-01-25T19:06:19.100-05:002019-01-25T19:06:19.100-05:00Austin, I wrote a short post earlier, responding t...Austin, I wrote a short post earlier, responding to your latest post in which I broached, in a rather oblique fashion, some details of my personal model-theory. This might be against blog rules even in that format. In any case I kind of mangled what I had intended to say, along with implying that I was close to completing the model, which isn't at all the case. There are just a lot of David Schroederhttps://www.blogger.com/profile/18048116250413347228noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-90441381611412096612019-01-25T12:45:39.816-05:002019-01-25T12:45:39.816-05:00Austin, I'm in a much better frame of mind tod...Austin, I'm in a much better frame of mind today, after a harrowing, 140 mile, round-trip, ride to the dentist with spongy brakes that went almost to the floor, yesterday morning. Got the brake fixed yesterday afternoon (weren't bled properly). Interesting that you brought up multiple Higg's - "Higg's (maybe plural)", as there has been speculation about possible David Schroederhttps://www.blogger.com/profile/18048116250413347228noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-23317174702824272432019-01-24T05:30:53.723-05:002019-01-24T05:30:53.723-05:00Glad to be of help/encouragement, David. This site...Glad to be of help/encouragement, David. This site could get one down as it seems like one laugh short of an execution warrant :) <br /><br />In terms of the blog theme, IMO as an amateur, weak isospin still has a lot in it to be discovered or at least is connected with a lot to be discovered in particles/fields and their interactions, within the Standard Model. Neutrinos, higgs (maybe plural),ben6993https://www.blogger.com/profile/11246990849377879772noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-27483486266549939692019-01-23T15:06:49.293-05:002019-01-23T15:06:49.293-05:00It's a bit more complicated, but well known; t...It's a bit more complicated, but well known; there is even a <a href="https://en.wikipedia.org/wiki/Weak_isospin" rel="nofollow"><b>Wikipedia page</b></a> on it!<br />Phillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-59738952771717070132019-01-23T12:51:00.196-05:002019-01-23T12:51:00.196-05:00Austin, Thank you informing me about this and the ...Austin, Thank you informing me about this and the encouragement. I greatly appreciate that. Amazingly, last night, I was on page 113 of the Third Edition of "Introduction to High Energy Physics", by Donald H. Perkins, and right at the bottom of the page, the very interaction that caught my attention back in 1994 - a neutral lambda decaying to a proton and negative pion - and was David Schroederhttps://www.blogger.com/profile/18048116250413347228noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-40790606813905940932019-01-17T10:45:19.382-05:002019-01-17T10:45:19.382-05:00David Schroeder wrote on 12 January 2019
".....David Schroeder wrote on 12 January 2019<br /><br />"...Then, a careful accounting of weak-isospin in several non-standard interactions showed that they didn't add up properly from input to output. Tried every trick I could think of, but nothing worked..."<br /><br />I would keep trying as weak isospin eigenvalues do not 'appear' to be conserved in interactions. Take a LH ben6993https://www.blogger.com/profile/11246990849377879772noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-43219813481926172832019-01-14T11:57:36.602-05:002019-01-14T11:57:36.602-05:00@Ueli
"When they will cooling down the magne...@Ueli<br /><br />"When they will cooling down the magnets, the street between Lyon and Geneva has to be allocated exclusively for the nitrogen road tankers for weeks and so on. "<br /><br /> ???<br /> How many ridiculous, irrealistic things can be written on this blog, devoid of any factual truth?<br /> What the hell are you talking about... the coold down from room temperature of roberto kersevanhttps://www.blogger.com/profile/08293551219458418162noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-84180913600541839332019-01-14T11:51:18.898-05:002019-01-14T11:51:18.898-05:00@Lawrence Crowell
Lawrence Crowell said...
@VYT,...@Lawrence Crowell<br /><br /> Lawrence Crowell said...<br />@VYT,<br /><br />"The Wikipedia site on LEP has the following:<br /><br />However, the energy of the bunches is limited due to losses from synchrotron radiation. In linear colliders, particles move in a straight line and therefore do not suffer from synchrotron radiation, but bunches cannot be re-used and it is therefore more roberto kersevanhttps://www.blogger.com/profile/08293551219458418162noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-34706846192842598842019-01-14T11:41:11.559-05:002019-01-14T11:41:11.559-05:00@sabine
"Therefore, it may very well be that...@sabine<br /><br />"Therefore, it may very well be that the LHC will remain the largest particle collider in human history."<br /><br /> Wrong prediction, I'm afraid!<br /><br /> The largest collider will "soon" (read, one decade or so) be built by the chinese, CEPC. <br /> 100 km tunnel lenght.<br /> In the meantime, in spite of your call to defund research in this roberto kersevanhttps://www.blogger.com/profile/08293551219458418162noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-49183135235404848362019-01-12T18:15:43.227-05:002019-01-12T18:15:43.227-05:00@Don Lincoln: "Personally, I was hoping for ...@Don Lincoln: "Personally, I was hoping for something to explain the generation problem...perhaps compositeness or some other equally disreputable idea that theorists didn't like." It's interesting that you were thinking along the lines of compositeness with respect to the three generation puzzle. Back a quarter century ago a seemingly simple and elegant idea occurred to me David Schroederhttps://www.blogger.com/profile/18048116250413347228noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-4663437781904546172019-01-09T06:59:35.547-05:002019-01-09T06:59:35.547-05:00@Steven Mason: Well, I learned a new word that I ...@Steven Mason: Well, I learned a new word that I never heard before "Kanamit" - presumably stimulated by the 1950's sci-fi classic "The Day the Earth Stood Still", where the 9 foot tall robotic alien "Gort" emerges from a landed craft in Washington, DC. I should have used the word "conclude" instead of "propose" to make the sentence David Schroederhttps://www.blogger.com/profile/18048116250413347228noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-26762684905798925472019-01-08T17:33:48.781-05:002019-01-08T17:33:48.781-05:00Schroeder wrote: it's tempting to propose that...Schroeder wrote: it's tempting to propose that our global society is bearing witness to products of a foreign, non-terrestrial technology<br /><br />Besides a proposal to bear witness to aliens, if and when the opportunity arises, what else do you propose? <br /><br />I'm not trying to be argumentative, but if I see an alien, I don't need anyone proposing that I should bear witness toSteven Masonhttps://www.blogger.com/profile/05140374687362624448noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-67838707495834436152019-01-08T07:17:56.228-05:002019-01-08T07:17:56.228-05:00As someone who has had nearly six decades of expos...As someone who has had nearly six decades of exposure to the UFO literature, I do have a glimmer of hope that there is new physics associated with gravity, or inertia, well below the Planck scale. An extraordinary report, such as the April 22nd, 1966 Beverly, Massachusetts incident, is a case in point. Of course that word "extraordinary" reminds us of Carl Sagan's dictum: "David Schroederhttps://www.blogger.com/profile/18048116250413347228noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-42774099684549762492019-01-05T15:26:05.442-05:002019-01-05T15:26:05.442-05:00How can physicists get out of the crisis of unders...How can physicists get out of the crisis of understanding in the basis of fundamental science, overcome the “troubles with physics” (Lee Smolin) and the “loss of certainty” (Morris Kline)?<br />Theoretical physicists should always remember the John Archibald Wheeler covenant:"Philosophy is too important to be left to the philosophers."<br />The crisis in the philosophical basis of Vladimir Rogozhinhttps://www.blogger.com/profile/13385171593551166175noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-42561878404314928022019-01-05T02:51:04.914-05:002019-01-05T02:51:04.914-05:00@Plasmoid Anomaly,
How right you are!
If you we...@Plasmoid Anomaly,<br /><br />How right you are! <br /><br />If you were to imagine a worldline where there is a tremendous unifying 150 year breakthrough in the next month, what then?<br /><br />Let’s further imagine that the new theory is simple, elegant, natural, beautiful, symmetrical, and requires no math beyond Maxwell’s equations.<br /><br />Such a turn of events - I would be very Anonymoushttps://www.blogger.com/profile/06444073442376283232noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-17880293976660796292019-01-04T14:11:00.417-05:002019-01-04T14:11:00.417-05:00It will be very hard for any theoretician to ackno... It will be very hard for any theoretician to acknowledge the fact that without empirical evidence supporting their ideas these ideas are mostly irrelevant; this impasse in HE theoretical physics clearly shows that what is needed is more empirical data no more empty "predictions"; but this impasse will go on as far as the "leaders" of this community are exactly the same Jeremy Jr. Thomashttps://www.blogger.com/profile/12101880943293972922noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-37609620084217684762019-01-04T03:27:49.707-05:002019-01-04T03:27:49.707-05:00Hi Sabine,
I think you are absolutely correct in ...Hi Sabine,<br /><br />I think you are absolutely correct in your judgement that policy makers will judge particle physicists as dishonest and that in any case, no utility either ongoing with the LHC or more powerful colliders is to be expected. However, I feel that physicists are getting off the hook far too easily. The reality is that not only should new colliders not be funded, but that the Marco Parigihttps://www.blogger.com/profile/00702055111711651319noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-56668662784696452922019-01-03T19:09:19.511-05:002019-01-03T19:09:19.511-05:00@ Axil: Remember that this picture of an electron ...@ Axil: Remember that this picture of an electron pair is a bit of a heuristic. However, we can address this matter from the perspective of quantum field theory and Dirac's old idea of the “Dirac sea.” To start Dirac proposed that the anti-electron sat in the bottom half of the momentum-energy light cone. The Lorentzian light cone with time arrow inside the cone and the basis vectors for Lawrence Crowellhttps://www.blogger.com/profile/12090839464038445335noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-62338121253990759182019-01-02T17:54:04.757-05:002019-01-02T17:54:04.757-05:00You seem to be up on Black hole stuff. Can you exp...You seem to be up on Black hole stuff. Can you explain this point that is confusing me?<br /><br />Hawking radiation produces a pair of particles created just outside the event horizon of a black hole. It is possible that the positive member of the pair (say, an electron) may escape - observed as thermal radiation emitting from the black hole - while the negative particle (say, a positron, with Axilhttps://www.blogger.com/profile/07190120527431077518noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-46219991088384625162019-01-02T05:02:53.434-05:002019-01-02T05:02:53.434-05:00PhDStudent said:
"(Note that I am not a high...PhDStudent said:<br /><br />"(Note that I am not a high-energy physicist, and the above views can be taken as those of a layman)"<br /><br />Thanks for your comment, which certainly gives some reassurance that the LHC is reporting something real.<br /><br />David Baileyhttps://www.blogger.com/profile/06172248428321078417noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-3749322329033111502019-01-02T04:58:52.732-05:002019-01-02T04:58:52.732-05:00I am looking for an answer if this 209 GeV will be...<i>I am looking for an answer if this 209 GeV will be enough to generate electron-positron pairs in a collision of two electron beams (instead of positron and electron beams). If that is enough the collision of electron beams will be the control experiment to confirm the SM conclusion about generation of positively and negatively charged particles pairs. So, once again, from SM such pairs should Phillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.com