{"id":29665,"date":"2016-03-18T19:27:53","date_gmt":"2016-03-18T18:27:53","guid":{"rendered":"https:\/\/ocasapiens-dweb.blogautore.repubblica.it\/?p=29665"},"modified":"2021-12-06T20:12:19","modified_gmt":"2021-12-06T19:12:19","slug":"chi-ha-ordinato-un-difotone","status":"publish","type":"post","link":"https:\/\/archivio.ocasapiens.org\/index.php\/2016\/03\/18\/chi-ha-ordinato-un-difotone\/","title":{"rendered":"Chi ha ordinato un difotone?"},"content":{"rendered":"

Nature<\/a><\/strong><\/em> la settimana scorsa parlava di nuovo delle “troppe” collisioni che, nei dati 2015 di ATLAS e CMS, due rilevatori del LHC, producono due fotoni da raggi gamma a\u00a0750 GeV.\u00a0Sono le famose “gobbe” annunciate\u00a0tre mesi fa<\/a><\/strong> che hanno gi\u00e0 generato centinaia di paper con ipotesi sulla nuova particella – Ma che razza di bosone \u00e8? Sar\u00e0 mica un gravitone? Un nanobuco nero? – sebbene la sua esistenza sia ancora da confermare:<\/p>\n

the reaction of many experts was similar to that of US physicist Isidor Isaac Rabi when the muon, a heavier relative of the electron, was discovered in 1936: \u201cWho ordered that?\u201d<\/em><\/p>\n

Da\u00a0Moriond<\/a><\/strong> dove si svolge il tradizionale seminario sciistico dei fisici delle alte energie,\u00a0il supersimmetrista Ben Allanach<\/a><\/strong> aggiorna i lettori del Guardian<\/em> <\/a><\/strong>sulla parte non sciistica:<\/p>\n

ATLAS has re-analysed its data taken at in the first run, and now sees a 1.9 sigma excess at 750 GeV (they hadn\u2019t analysed this region in December). CMS has analysed the data it took while its magnet was off due to a malfunction, and the local significance of the resonance has increased from 2.6 sigma to 2.9 sigma. Both of these improvements, while not a massive deal on their own, do move in the direction of making the experimental result even more intriguing, and will likely cause another avalanche of theoretical papers explaining the collisions. <\/em><\/p>\n

R\u00e9sonaances<\/strong>\u00a0<\/a>fa due pi\u00f9 due:<\/p>\n

The combined significance quoted by CMS is 3.4 sigma, \u00a0similar for spin-0 and spin-2 analyses. Unlike in ATLAS, the best fit is for a narrow resonance, which is the more preferred option from the theoretical point of view.<\/em>
\nIn summary, the diphoton excess survived the first test. \u00a0After adding more data and improving the analysis techniques the significance slightly increases rather than decreases, as expected for a real particle. \u00a0The signal is now a bit more solid: both experiments have a similar amount of diphoton data and they both claim a similar significance of the \u00a0750 GeV bump. \u00a0It may be a good moment to rename the ATLAS diphoton excess as the LHC diphoton excess \ud83d\ude42 \u00a0So far, the story of 2012 is repeating itself: the initial hints of a new resonance solidify into a consistent picture. Are we going to have another huge discovery this summer?<\/em><\/p>\n

Dopo una sistemata, il collisorone \u00e8 stato riacceso due settimane fa<\/a><\/strong>, tra poco \u00e8 a regime – stay tuned.<\/p>\n

*<\/p>\n

Marco Delmastro di ATLAS non ne parla (agg.:<\/strong>\u00a0sul suo blog, a\u00a0Moriond <\/a><\/strong>s\u00ec, \u00a0h\/t Marco), ma \u00e8 morto Oliver<\/a><\/strong>, il cane al quale spiegava il bosone di Higgs e molto altro, condoglianze e abbracci.<\/p>\n

*<\/p>\n

Giorgio Parisi<\/strong>\u00a0<\/a>ha ricevuto il premio Onsager, complimenti e abbracci.<\/p>\n

*<\/p>\n

Sono uscite anche le temperature<\/a><\/strong> NOAA dell’inverno. Rispetto a GISS-NASA e JMA, la NOAA fa molti esempi che mostrano come varia localmente l’anomalia media di 1,21 \u00b0C. Nick Stokes paragona<\/a><\/strong> l’effetto del Ni\u00f1o 1997-1998 con quello attuale: stesso picco in febbraio; Tamino<\/a><\/strong> analizza la sua influenza sui dati NOAA come aveva fatto per quelli GISS-NASA:<\/p>\n

el Ni\u00f1o\u00a0brought\u00a0<\/em>part\u00a0of the record-breaking heat. But not all of it. There\u2019s also that trend \u2014 the one due to\u00a0<\/em>global warming.\u00a0<\/em><\/p>\n

Grafico<\/a><\/strong> con le previsioni dei modelli vs. osservazioni aggiornato da Zeke Haufstadter di Berkeley Earth<\/a>.<\/p>\n

*<\/p>\n

Sorpresona:<\/a><\/strong><\/p>\n

Chris Horner, a DC-based lawyer, climate change denier and Fox News regular, is also being paid as a “Regulatory Counsel” for the coal company, Alpha Natural Resources, according to bankruptcy filings reviewed by the Center for Media and Democracy (CMD). Horner\u2019s repeated filing of lawsuits against leading U.S. climate scientists has been described as “harassment<\/a>“.\u00a0<\/em><\/p>\n

***<\/p>\n

Perugia patrocina le scie chimiche anche nel Parco delle Bufale<\/a><\/strong>.<\/p>\n

***<\/p>\n

Usque<\/strong>???<\/strong><\/p>\n

Camillo Franchini sostiene che\u00a0la buona fede e l\u2019onest\u00e0 personale siano “considerazioni da preti”<\/a>\u00a0irrilevanti in campo scientifico e\u00a0deride<\/a><\/strong> chi – come E.K. Hornbeck e molti altri – sostengono il contrario:<\/p>\n

Venni bandito dal blog di Franchini perch\u00e9 mi ersi a paladino dell\u2019onest\u00e0, anche in campo scientifico. Ma mi interessavano anche altri campi: l\u2019onest\u00e0 delle spose, della Signora Chaouqui, di Verdini e di altri che non ricordo.<\/em><\/p>\n

(gli “altri campi” sono pura menzogna, ovviamente).<\/p>\n

Al posto nostro, Ivan Oransky e Adam Marcus\u00a0rispondono<\/a><\/strong>:<\/p>\n

\u00a0A 2011 analysis found that more than 6,500 patients had received treatments in studies later retracted for fraud. When researchers counted all of the volunteers in trials that somehow drew on that fraudulent research, the figure was a staggering 400,000.<\/em>
\nSo the next time you read about academic fraud, in these pages or others, and it seems a purely academic issue, think of all those patients \u2014\u00a0and all that avoidable suffering.<\/em><\/p>\n

Come derider\u00e0 il dott. Franchini “tutta questa sofferenza evitabile”?<\/p>\n","protected":false},"excerpt":{"rendered":"

Nature la settimana scorsa parlava di nuovo delle “troppe” collisioni che, nei dati 2015 di ATLAS e CMS, due rilevatori del LHC, producono due fotoni da raggi gamma a\u00a0750 GeV.\u00a0Sono le famose “gobbe” annunciate\u00a0tre mesi fa che hanno gi\u00e0 generato centinaia di paper con ipotesi sulla nuova particella – Ma che razza di bosone \u00e8?… Continua a leggere Chi ha ordinato un difotone?<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,16],"tags":[977,1088,1951,3045,3376,3566,3964,4850,6633],"class_list":["post-29665","post","type-post","status-publish","format-standard","hentry","category-clima","category-fisica","tag-bosoni","tag-camillo-franchini","tag-difotone","tag-giorgio-parisi","tag-i-i-rabi","tag-integrita-scientifica","tag-lhc","tag-noaa","tag-susy","entry"],"_links":{"self":[{"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/posts\/29665","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/comments?post=29665"}],"version-history":[{"count":2,"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/posts\/29665\/revisions"}],"predecessor-version":[{"id":44070,"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/posts\/29665\/revisions\/44070"}],"wp:attachment":[{"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/media?parent=29665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/categories?post=29665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/archivio.ocasapiens.org\/index.php\/wp-json\/wp\/v2\/tags?post=29665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}