tag:blogger.com,1999:blog-22973357.post4873680823897434174..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Black Holes at the LHC - The CERN Safety reportSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger35125tag:blogger.com,1999:blog-22973357.post-61738405627951892022008-09-09T06:41:00.000-04:002008-09-09T06:41:00.000-04:00Anonymous,You indeed got it completely wrong. It d...Anonymous,<BR/><BR/>You indeed got it completely wrong. It doesn't take infinite density to produce a black hole, and producing one would not mean we would die all anyhow. So how about you breath deeply, in, out, and calm down again because the earth will not end tomorrow. Besides this, I recommend reading some of the relevant literature before coming to completely nonsensical conclusions. Best,<Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-88315313373117659512008-09-09T06:37:00.000-04:002008-09-09T06:37:00.000-04:00Keith,If you had read this post, any of the above ...Keith,<BR/><BR/>If you had read this post, any of the above mentioned posts, or any of the extensive literature on the subject you could have easily answered your questions. Excuse me, but I find it extremely annoying to answer the same questions over and over again to people who pretend to have an interest but don't even bother to read a complete paragraph.<BR/><BR/>Please check our posts <A Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-79447163648979769232008-09-09T01:59:00.000-04:002008-09-09T01:59:00.000-04:00I would like this "black hole" issue explained a l...I would like this "black hole" issue explained a little. The first question is whether a collision btween two (or more?) protons considering their relativstic masses and velocities is capable of producing a black hole (for my layman's view this equates with asking whether there is anough pressure available to squeeze the masses into a volume small enough to have the requisite density).<BR/><BR/>Unknownhttps://www.blogger.com/profile/13338375481165796897noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-65331968851382233822008-09-08T21:30:00.000-04:002008-09-08T21:30:00.000-04:00I dont know much and not good with numbersblack ho...I dont know much and not good with numbers<BR/>black hole =inf. density (no mater the size)<BR/> or maybe i got it wrong and you dont have to read more<BR/>so 2 scenarios if i got it right <BR/>1 they are not going to produce a black hole <BR/>2 they will and density is relevant to weight/gravity so we die no mater how small black hole is <BR/><BR/>ps i think its to early for human kind to test Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-67776517913295177572008-08-22T19:30:00.000-04:002008-08-22T19:30:00.000-04:00From the 'other CERN scholars' report: "Section 4...From the 'other CERN scholars' report: "<BR/><BR/>Section 4 reviews the highly hypothetical production of neutral stable black<BR/>holes, and the possibility that these black holes could be trapped inside the Earth. While<BR/>such a possibility is dismissed by most of the experts, it is conceivable, and it could have<BR/>potentially dangerous consequences if these highly hypothetical, neutral, pechmerlehttps://www.blogger.com/profile/02763132849878431992noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-8608583064278612562008-06-30T17:27:00.000-04:002008-06-30T17:27:00.000-04:00Hi,I was reading alot about the LHC recently and i...Hi,<BR/><BR/>I was reading alot about the LHC recently and its had me pretty worried.( i know i shouldnt be ) but i suppose im that sort of person.Anyway i wanted to say thanks this seems to be the only page iv found with honest answers to these questions. I dont mean to offend anyone here but i hope you can see how someone with very little understanding of the LHC or physics could get worked up Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-84592421464630740812008-06-30T12:05:00.000-04:002008-06-30T12:05:00.000-04:00Wagner's lawsuit is completely bogus, and should b...Wagner's lawsuit is completely bogus, and should be dealt a peremptory dismissal as a purely theatrical exercise in self-advertisement. However, let us not forget two things: (1) when the Trinity test was about to take place, respected scientists such as Fermi and Oppenheimer were taking bets on whether the bomb would ignite the atmosphere and destroy the world and (2) Castle Bravo had a plannedAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-25758229534990200452008-06-30T10:07:00.000-04:002008-06-30T10:07:00.000-04:00Is it "fact", tachyon :http://en.wikipedia.org/wik...Is it "fact", tachyon :<BR/>http://en.wikipedia.org/wiki/Tachyon dispersion should start appearing locally "before" the LHC smashes particles together in real time?<BR/><BR/>PS could this be evidence:http://www.thesun.co.uk/sol/homepage/news/ufos/article1347649.eceUnknownhttps://www.blogger.com/profile/14935708858143183932noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-29508827270506342642008-06-27T05:52:00.000-04:002008-06-27T05:52:00.000-04:00Hi Anonymous,As much as I am sure everyone involve...Hi Anonymous,<BR/><BR/><I>As much as I am sure everyone involved with the LHC at CERN deserves the utmost in respect for their scientific achievement, I ask if they have taken into account the fact that nothing, absolutely nothing is 100 percent certain in this world.</I><BR/><BR/>Everybody knows that and the people working at CERN are no exception to this. If you cross the street it is also notSabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-9438418235254001672008-06-26T07:43:00.000-04:002008-06-26T07:43:00.000-04:00As much as I am sure everyone involved with the LH...As much as I am sure everyone involved with the LHC at CERN deserves the utmost in respect for their scientific achievement, I ask if they have taken into account the fact that nothing, absolutely nothing is 100 percent certain in this world.<BR/><BR/>I also know that technology can be ahead of our ability to fully understand the long term consequences of our actions.<BR/> <BR/>As I understand Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-9556095742113139222008-06-25T03:15:00.000-04:002008-06-25T03:15:00.000-04:00Bee said:" Good question. I guess it's because thi...Bee said:<BR/><BR/>" Good question. I guess it's because this guy Wagner lives there? "<BR/><BR/>I think they're suing Fermilab because they supplied some magnets... but I've heard it's only because they couldn't find a lawyer in Europe to take on their case :PMikehttps://www.blogger.com/profile/03815780770101102677noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-78566422517822303772008-06-24T12:37:00.000-04:002008-06-24T12:37:00.000-04:00Hi Bee, thanks for highlighting this, I didn't kno...Hi Bee, thanks for highlighting this, I didn't know the report was out. <BR/><BR/>It may seem daft to most physicists, but this type of public concern is not at all a trivial matter. I think the root of the matter is that certain people trust the word of scientists up to a given point (the existence of black holes), but no further (evaporation). <BR/><BR/>Sadly,the reaction of such people to a Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-31704920022401739902008-06-24T04:09:00.000-04:002008-06-24T04:09:00.000-04:00Hi Changcho,Good question. I guess it's because th...Hi Changcho,<BR/><BR/>Good question. I guess it's because this guy Wagner lives there? It indicates to me they did it mostly for the show-effect and not because they actually thought it would be necessary or good for something. Best,<BR/><BR/>B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-66205792426021073842008-06-23T15:52:00.000-04:002008-06-23T15:52:00.000-04:00My question is, what's with the lawsuit in Hawaii?...My question is, what's with the lawsuit in Hawaii? Such a lawsuit has no jurisdiction over the starting up of the LHC, which is in Europe, no? <BR/><BR/>I am glad they've written up the CERN safety report, btw.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-71935229206509265412008-06-23T10:13:00.000-04:002008-06-23T10:13:00.000-04:00Hyperlinking 'earth' was probably done automatical...Hyperlinking 'earth' was probably done automatically - by software.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-55555322304070112752008-06-23T08:51:00.000-04:002008-06-23T08:51:00.000-04:00Ha, sorry for the misunderstanding ;-)Ha, sorry for the misunderstanding ;-)Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-61636057249437224302008-06-23T08:37:00.000-04:002008-06-23T08:37:00.000-04:00Hi Klaus,I guess you find the answers to your ques...Hi Klaus,<BR/><BR/>I guess you find the answers to your questions in the <A HREF="http://cdsweb.cern.ch/record/1092437/files/CERN-Brochure-2008-001-Eng.pdf" REL="nofollow">CERN faq: LHC- the guide</A> (PDF file). <BR/><BR/>On page 30, you'll find a table with the important parameters for the LHC:<BR/><BR/>There are about 3000 proton bunches per beam, with a distance of about 10 metres in between,Stefan and Beehttps://www.blogger.com/profile/05861898716166927298noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-90043344382513152342008-06-23T07:16:00.000-04:002008-06-23T07:16:00.000-04:00Hi Quasar,Interesting question. Well, I don't know...Hi Quasar,<BR/><BR/>Interesting question. Well, I don't know what death is like, but if you'd fall into a black hole this would be fatal in itself. Best,<BR/><BR/>B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-83153045455717511222008-06-23T07:13:00.000-04:002008-06-23T07:13:00.000-04:00Hi CIP,That is correct and I never claimed I know ...Hi CIP,<BR/><BR/>That is correct and I never claimed I know things that nobody knows. Best,<BR/><BR/>B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-2927113810112024812008-06-23T07:11:00.000-04:002008-06-23T07:11:00.000-04:00Klaus: The rest mass of the protons used for the L...Klaus: The rest mass of the protons used for the LHC is the same as the rest mass of every other proton, roughly a GeV. If that wasn't your question then I didn't understand it. Best,<BR/><BR/>B.Sabine Hossenfelderhttps://www.blogger.com/profile/06151209308084588985noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-33208826153924048582008-06-22T23:51:00.000-04:002008-06-22T23:51:00.000-04:00Hi,Do you guys know the total mass (at rest) of th...Hi,<BR/><BR/>Do you guys know the total mass (at rest) of those protons in one beam?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-22973357.post-5611959452950016782008-06-22T21:04:00.001-04:002008-06-22T21:04:00.001-04:00Bee says,In this particular situation I find the a...Bee says,<BR/><BR/><I>In this particular situation I find the argument about the black hole scenario ridiculous, but that's because it's a topic I happen to have worked on and know something about.</I><BR/><BR/>Well of course you know something of the theory of black holes, though you don't really know much about the dynamics because nobody has ever observed a small black hole. Hawking's CapitalistImperialistPighttps://www.blogger.com/profile/17523405806602731435noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-44743242730411716272008-06-22T21:04:00.000-04:002008-06-22T21:04:00.000-04:00Bee says,In this particular situation I find the a...Bee says,<BR/><BR/><I>In this particular situation I find the argument about the black hole scenario ridiculous, but that's because it's a topic I happen to have worked on and know something about.</I><BR/><BR/>Well of course you know something of the theory of black holes, though you don't really know much about the dynamics because nobody has ever observed a small black hole. Hawking's CapitalistImperialistPighttps://www.blogger.com/profile/17523405806602731435noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-37034135036031688632008-06-22T14:40:00.000-04:002008-06-22T14:40:00.000-04:00Well Bee, I'm certainly sleep easier now.I was sti...Well Bee, I'm certainly sleep easier now.<BR/>I was still trying to figure out the information paradox.<BR/><BR/>I wonder if death is like falling into a microstate-blackhole, and what comes out the other side - hopefully there is some information loss, there are some memories/nightmares I'd be happy to lose forver - and there are others I like to linger on & playback in my mind.QUASAR9https://www.blogger.com/profile/00593390598251093182noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-71301225004111174392008-06-22T13:33:00.000-04:002008-06-22T13:33:00.000-04:00This issue is not properly addressed by degreed pe...This issue is not properly addressed by degreed personnel tapping on electronic keyboards in air-conditioned vaults. The proper response is mobs with torches and pitchforks storming a cathedral then burning alive its priests in a public square.<BR/><BR/>Perform a calibration run at <I>Re-ese Adbarat Kidiste Kidusan Dingel Maryam Ts’iyon</I> in Axum, Ethiopia. 14°07′49″N 38°43′10″E. Test of Anonymousnoreply@blogger.com