tag:blogger.com,1999:blog-2846514233477399562.post7184261831299467022..comments2024-01-08T09:37:04.406+01:00Comments on RÉSONAANCES: Next stop: tthJesterhttp://www.blogger.com/profile/08947218566941608850noreply@blogger.comBlogger14125tag:blogger.com,1999:blog-2846514233477399562.post-11644286884164225852016-09-09T21:19:22.437+01:002016-09-09T21:19:22.437+01:00Hi,
you may have heard of the paper arXiv:1506....Hi,<br /><br /> you may have heard of the paper arXiv:1506.00612v2 "The compatibility of LHC Run 1 data with a heavy scalar of mass around 270 GeV". I'm not saying anything about the credibility of such model, but this incarnation of the 2HDM seems to live well with (actually, to contaminate) a measured ttH cross-section larger than the SM prediction alone. <br /><br />Cheers,<br />RiccardoRiccardo Di Sipiohttps://www.blogger.com/profile/14775353990899591603noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-8703047140961420402016-09-07T14:07:52.156+01:002016-09-07T14:07:52.156+01:00BTW (and apologies for an offtop Jester) a really,...BTW (and apologies for an offtop Jester) a really, really neat summary of the current state of HEP from Natali Wolchover (Quanta Magazine):<br /><br /><a href="https://www.quantamagazine.org/20150803-physics-theories-map" rel="nofollow">Frontiers of Physics</a>RBShttps://www.blogger.com/profile/05190152376766693948noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-73667378820256221272016-09-02T22:46:41.034+01:002016-09-02T22:46:41.034+01:00Jester, any thoughts on the Z+(H->WW) deviation...Jester, any thoughts on the Z+(H->WW) deviations?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-19164813519676720412016-09-01T17:14:04.742+01:002016-09-01T17:14:04.742+01:00RBS, no, it's fairly straightforward to constr...RBS, no, it's fairly straightforward to construct a model that explains it. Take for example, 2-Higgs-Doublet model at low tan beta, plus vector-like tops with negative Yukawa coupling to the Higgs. So we can still write 500 papers if the deviation becomes significant :) What I meant is that I'm not aware of a model where 1) Yukawa top is much larger than one, and 2) gluon fusion rate is SM-like arise naturally, without ad-hoc tuning of model parameters. Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-1065929755987006202016-09-01T16:01:15.457+01:002016-09-01T16:01:15.457+01:00R_b for the next generation...
FlakR_b for the next generation...<br /><br />FlakAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-86549917131158429182016-09-01T15:14:44.894+01:002016-09-01T15:14:44.894+01:00Jester, does it mean that if the discovery is conf...Jester, does it mean that if the discovery is confirmed the theory wouldn't have much to explain it? Such a contrast to our previous conundrum - or is it post effect?RBShttps://www.blogger.com/profile/05190152376766693948noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-52696478820856102542016-09-01T14:41:47.417+01:002016-09-01T14:41:47.417+01:00My hoarse-sounding horn
Invites thee to the chase,...<b>My hoarse-sounding horn<br />Invites thee to the chase, the sport of kings.</b><br /><br /><i>William Somerville - "The Anomaly Chase"</i>Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-15170842763994946522016-09-01T11:30:30.772+01:002016-09-01T11:30:30.772+01:00It's a bit unrelated - however also on BSM, so...It's a bit unrelated - however also on BSM, so i dare to ask it here :)<br />There was a 2.5sigma global excess at 1.5TeV in the WZ channel of ATLAS (http://link.springer.com/article/10.1007%2FJHEP12%282015%29055). Is there any news on that? Did CMS publish similar measurements?Andreasnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-46822965350235942892016-09-01T09:27:33.960+01:002016-09-01T09:27:33.960+01:00Tax, indeed, the heavy top partner in composite H...Tax, indeed, the heavy top partner in composite Higgs or little Higgs models completes the gluon fusion diagram such that the total rate is only slightly affected. The problem is that in those theories you get *suppressed* tth. Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-23295354598192939532016-09-01T09:23:54.192+01:002016-09-01T09:23:54.192+01:00Yep, the minus is a bottom part of something else ...Yep, the minus is a bottom part of something else on the slide from which I cut the image :) Jesterhttps://www.blogger.com/profile/08947218566941608850noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-50254443164827580432016-09-01T08:52:09.155+01:002016-09-01T08:52:09.155+01:00Instead of looking for some improbable deviation f...Instead of looking for some improbable deviation from the standard model, I suggest you all go fishing, at least you are sure to find something.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-8488654136079493942016-09-01T08:41:38.264+01:002016-09-01T08:41:38.264+01:00Xezlec, it looks like an image-cropping effect :) ...Xezlec, it looks like an image-cropping effect :) Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-49510395862876002432016-09-01T04:56:00.191+01:002016-09-01T04:56:00.191+01:00I thought top partners in little Higgs theories ju...I thought top partners in little Higgs theories just did the jobTaxhttps://www.blogger.com/profile/16365943617726261903noreply@blogger.comtag:blogger.com,1999:blog-2846514233477399562.post-67298892342660671672016-09-01T02:13:58.475+01:002016-09-01T02:13:58.475+01:00In that gluon fusion diagram, what does the little...In that gluon fusion diagram, what does the little minus sign on the gluon mean? Is it something about its phase?Anonymoushttps://www.blogger.com/profile/09702349560231225588noreply@blogger.com