tag:blogger.com,1999:blog-2846514233477399562.post1791719332275149464..comments2024-01-08T09:37:04.406+01:00Comments on RÉSONAANCES: Higgs: more of the same Jesterhttp://www.blogger.com/profile/08947218566941608850noreply@blogger.comBlogger15125tag:blogger.com,1999:blog-2846514233477399562.post-24020629102298364732013-03-21T09:42:23.171+01:002013-03-21T09:42:23.171+01:00"Such heavier Higgses, if found would be BSM,..."Such heavier Higgses, if found would be BSM, correct? Can we expect to have this question closed by Run 2? And also would it favour (or not) some BSM theories like SUSY?"<br /><br />They would be called BSM, but it could be very minimal BSM, namely it could simply be that the SM is realized with two Higgs doublets instead of one (for example one giving mass to up-fermions and one to down-fermions like in the MSSM) without there being other BSM physics within reach. So people would certainly not hesitate to claim that finding such Higgses would be a hint towards the MSSM, but this need not be so at all.Alexnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-49109055206066130342013-03-20T22:02:54.391+01:002013-03-20T22:02:54.391+01:00Jester, thanks! (Anon 3). Such heavier Higgses, if...Jester, thanks! (Anon 3). Such heavier Higgses, if found would be BSM, correct? Can we expect to have this question closed by Run 2? And also would it favour (or not) some BSM theories like SUSY?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-80294767497528203202013-03-20T21:43:20.526+01:002013-03-20T21:43:20.526+01:00Well, TESLA merged into the ILC project. Time will...Well, TESLA merged into the ILC project. Time will tell whether and when it will come into existence... Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-32845347617023177302013-03-20T20:24:18.799+01:002013-03-20T20:24:18.799+01:00Jester,
I have been a long time lurker. Than...Jester,<br /> <br /> I have been a long time lurker. Thanks for all the great posts....<br /><br />I am no longer in the field (a long story) but I have been following the Higgs since my introduction to it in 1988 as part of coursework for my Ph.D. And I am proud to say that I made more than a few significant contributions to the hunt along the way...<br /><br />Well, call me gobsmacked, a fundamental scalar exists at mass which is clearly suggesting to us that the next new physics threshold may be forever beyond our reach...<br /><br />At Snowmass 2001, you would have garnered strange looks if you asked what if SM and nothing else at the LHC. Looking up the chimney and seeing nothing but blue sky so to speak. It would seem the famous "No Lose Theorem" of a TeV scale collider paid off with the lowest possible jackpot...<br /><br />Anyway, what I would give to share a beer with the Higgs Hunters Guide now...<br /><br />Any chance that we can dust off the TESLA TDR?<br /><br /> Flakmeisternoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-44453349268011059842013-03-20T18:19:31.379+01:002013-03-20T18:19:31.379+01:00Marco Frasca,
you'b better learn some basics ... Marco Frasca,<br /><br />you'b better learn some basics of statistics before making such a claim.chrisnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-31433840674396437422013-03-20T13:08:57.814+01:002013-03-20T13:08:57.814+01:00I would just rise a flag on the measurement, very ...I would just rise a flag on the measurement, very precise apparently, by CMS of the WW decay. This hints toward a lower value than one and agrees (but here errors are larger) with ZZ decay. This seems BSM peeping out. I think we need to wait for improvements here to see the emerging of an evidence and ATLAS is still well beyond that values. If the values of the rates are lower than expected from SM, Brazil bands figures should be somewhat tuned again and some surprises would come out about higher mass Higgs bosons that now appear just a fluctuating background.Marco Frascahttp://marcofrasca.wordpress.com/noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-39097409012199221132013-03-20T01:08:58.199+01:002013-03-20T01:08:58.199+01:00Currently there are no serious experimental hints ...Currently there are no serious experimental hints that other Higgs bosons exist, but it is certainly a possibility. In any case, from the current LHC data it seems that even if the 125 GeV particle is merely *a* Higgs boson it is the most important Higgs boson. The heavier partners would couple less strongly to W and Z bosons, and thus would contribute less to their masses. Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-58797880294710299612013-03-20T00:23:17.344+01:002013-03-20T00:23:17.344+01:00Jester, I forgot which announcement it was that re...Jester, I forgot which announcement it was that referred to possibility of the 125 GeV Higgs being the lightest one of a Higgs multiplet. Any comments on that (of course if it's not a thing of my imagination)?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-10017916752256433572013-03-19T19:55:15.713+01:002013-03-19T19:55:15.713+01:00CERN said "... It remains an open question, ...CERN said "... It remains an open question, however, whether this is ... the lightest of several bosons predicted in some theories that go beyond the Standard Model. ...". <br /><br />Does that "give [you] and edge to hang on to" as "a BSM physicist" ? <br /><br />TonyAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-91687828227583586102013-03-19T14:52:01.939+01:002013-03-19T14:52:01.939+01:00I'd insist it's just a small difference of...I'd insist it's just a small difference of emphasis. I'm a BSM physicist, and for me it's somewhat disappointing that the Higgs does not give me an edge to hang on to, especially given the early promises and that the current situation will be frozen for another 2 years. CERN on the other hand is stressing that there's still a long way to go. Both points of view are perfectly legitimate imo. Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-81808680156865221842013-03-19T14:23:22.932+01:002013-03-19T14:23:22.932+01:00Jester:
> I don't think there's a contr...Jester:<br />> I don't think there's a contradiction.<br /><br />You are right there isn't. <br />Their statement:<br /><br />"It remains an open question<br />if it is a SM Higgs"<br /><br />and your statement:<br /><br />"It screams: "I'm a SM Higgs"."<br /><br />are not in logical contradiction.<br />But they are different.<br />Theirs is a statement about the<br />situation July 4th, 2012, yours<br />is a statement about the news.<br />They did not report the news.<br /><br />What is missing in their statement <br />is a sentence like:<br />"13 of its properties were measured with limited precision and they are all SM like, i.e. it seems to be the SM Higgs boson we were looking for."<br />Why is it missing? <br /><br />It summarizes the real situation, and is understandable to journalists and politicians.<br />Why did they omit it?<br />(Don't tell me because they <br />forgot ;-)).<br /><br />Because it is missing the general<br />newspapers (which mostly just copy<br />the CERN statements) did not<br />inform the public about the <br />real news.Anon-2noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-79948780521893322772013-03-19T12:35:55.833+01:002013-03-19T12:35:55.833+01:00Anon-2: I don't think there's a contradict...Anon-2: I don't think there's a contradiction. I'm stressing that, at this point, it looks exactly as the SM Higgs without a single hint of anything unusual. CERN emphasizes that in the future things may change. The current precision of Higgs coupling measurements is 20-50%, depending on the coupling. It is not excluded that when they go down to 10-20% precision during the next run, some deviations of the Higgs couplings from the SM predictions will be revealed. <br />Anon-1: From the BSM point of view the Planck data are utterly depressing :-) Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-23784821048772373002013-03-19T12:29:54.611+01:002013-03-19T12:29:54.611+01:00Looks like won't need to keep our eyes on the ...Looks like won't need to keep our eyes on the CERN chimney for the white smoke signaling habemus BSM, at least for a few years. With HEP folks in denial or depression, where is this going? A field of this size seems highly unsustainable unless we get some kind of a miracle in the second half of the decade.<br />Well, the signs for this to happen were there (cosmological constant problem is also not solved by new physics at the 10^-3 eV scale; or precision tests, flavor, etc)... Let's see what Planck says this week.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-842783530742335912013-03-19T12:13:24.352+01:002013-03-19T12:13:24.352+01:00You write:
"To say that the Higgs is standard...You write:<br />"To say that the Higgs is standard-model-like is an understatement. This bastard screams and spits standard model." <br /><br />whereas CERN announces to the public on March 14:<br />"It remains an open question, however, whether this is the Higgs boson of the Standard Model of particle physics..."<br /><br />What is this very different evaluation due to?<br /><br />They further state:<br />"To determine if this is the Standard Model Higgs boson, the collaborations have, for example, to measure precisely the rate at which the boson decays into other particles and compare the results to the predictions." <br /><br />making it appear to the outsider<br />(who cannot appreciate the subtle meaning of "precisely") as if none of these comparisons have already been done.<br /><br />Could it be that CERN misrepresents the results for the public to avoid a critical politician's question<br />"If you found what u were looking for and nothing else, why can't we close CERN down?"Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-60408977881488266062013-03-19T07:43:30.679+01:002013-03-19T07:43:30.679+01:00And just as you said also : "let's turn o...And just as you said also : "let's turn our eyes to heaven" ... looking for a smoking gun from <i>tenebris materia</i> or counting how many <i>wimpibili</i> in the sky ?cbhttps://www.blogger.com/profile/03349828290008437401noreply@blogger.com