{"title":"Ghost Particles","description":"Signals and ideas once taken seriously, later abandoned.","products":[{"product_id":"sir-aetheron-pixel-hoodie","title":"Sir Aetheron – The Luminiferous Aether and Michelson–Morley Pixel Hoodie","description":"\u003cp\u003eSir Aetheron, a fallen knight in cracked aether-glass armour, kneels on a cross-shaped stone interferometer floating on mercury, its fringes perfectly still.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eThe aether was the proposed medium for light waves, reaching back to Huygens’s \u003cem\u003eTraité de la Lumière\u003c\/em\u003e (1690). If Earth moves through it at its orbital speed, light should take slightly different times along two perpendicular arms of an interferometer. In 1887 A. A. Michelson and E. W. Morley floated their interferometer on mercury, rotated it, and looked for the fringe shift. They expected about 0.4 fringe. They saw less than one-twentieth of that, “probably less than one-fortieth”.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eΔN ≈ 2 L v² \/ (λ c²)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eΔN: expected fringe shift on rotating the apparatus by 90° (fringes)\u003c\/li\u003e\n\u003cli\u003eL: effective optical arm length, about 11 m with repeated reflections (m)\u003c\/li\u003e\n\u003cli\u003ev: Earth’s orbital speed, about 3 × 10⁴ m s⁻¹\u003c\/li\u003e\n\u003cli\u003eλ: wavelength of the light used, about 5.9 × 10⁻⁷ m\u003c\/li\u003e\n\u003cli\u003ec: speed of light, 299 792 458 m s⁻¹\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith these numbers ΔN ≈ 0.37, the expected 0.4. Lorentz–FitzGerald contraction could save a stationary aether, but Einstein’s 1905 special relativity made the medium unnecessary. Sources: Michelson \u0026amp; Morley, \u003cem\u003eAm. J. Sci.\u003c\/em\u003e 34, 333 (1887), doi:10.2475\/ajs.s3-34.203.333; APS News, “This Month in Physics History”, Nov 2007.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The 1887 null result did not kill every aether theory overnight; Lorentz’s version survived until relativity replaced it. The dates on the back mark the claim and the decisive test, not a single death certificate.\u003c\/p\u003e\u003ch3\u003eIn character\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eI waited for the wind of the Earth’s passage. It never came. My armour cracked, but the light ran straight through me, unmoved.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eOn the hoodie\u003c\/h3\u003e\u003cp\u003eFront: a cracked cross-shaped interferometer with a flat fringe bar. Front label: “AETHER DRIFT · NULL RESULT 1887”. Back: Sir Aetheron in full pixel art with “BORN 1690 - DIED 1887” and “THE STILL WIND.” Gildan 18500 Heavy Blend hoodie, Black, S to 5XL.\u003c\/p\u003e\u003cp\u003ePart of the \u003cstrong\u003eGhost Particles That Were Wrong\u003c\/strong\u003e set with \u003ca href=\"\/pl\/products\/enrayne-pixel-hoodie\"\u003eEnrayne\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/calorus-pixel-hoodie\"\u003eCalorus\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/diphantom-pixel-hoodie\"\u003eDiphantom\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/prematura-pixel-hoodie\"\u003ePrematura\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/thetarch-pixel-hoodie\"\u003eThetarch\u003c\/a\u003e. Browse all \u003ca href=\"\/pl\/collections\/hoodies\"\u003ephysics hoodies\u003c\/a\u003e, more \u003ca href=\"\/pl\/collections\/relativity-cosmos-t-shirts\"\u003erelativity \u0026amp; cosmos designs\u003c\/a\u003e, or the \u003ca href=\"\/pl\/collections\/deep-cuts\"\u003eDeep Cuts\u003c\/a\u003e.\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"Black \/ S","offer_id":50964467155047,"sku":"27950117142796064536","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":50964467187815,"sku":"20160912485558213266","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":50964467220583,"sku":"26332867976694335576","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":50964467253351,"sku":"23263471025259455711","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":50964467286119,"sku":"20076881190543740589","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":50964467318887,"sku":"26919207936067971170","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":50964467351655,"sku":"31906747619846215901","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":50964467384423,"sku":"12937325822508555935","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/03_H13_ab204fc8-d859-4762-9a69-db24a60aaa79.png?v=1793678417"},{"product_id":"enrayne-pixel-hoodie","title":"Enrayne – The N-Ray Delusion Pixel Hoodie","description":"\u003cp\u003eEnrayne, a knight in violet-grey armour whose visor shows only two faint eyes, leans toward an empty prism cradle and still sees rays.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eIn 1903 René Blondlot at Nancy announced “N-rays”, a new radiation he said made a faint spark brighter and could be dispersed by an aluminium prism into a spectrum. Dozens of papers followed. In 1904 the American physicist R. W. Wood visited and, in the darkened lab, secretly removed the prism. The observers went on reading the same spectrum. His letter in \u003cem\u003eNature\u003c\/em\u003e 70, 530 (29 September 1904) ended the field. N-rays do not exist; what was measured was the observers’ expectation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eReal signal test:  S \/ σ\u003csub\u003eobs\u003c\/sub\u003e  with the observer blind to the condition\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eS: change in the measured quantity when the claimed cause is present versus absent\u003c\/li\u003e\n\u003cli\u003eσ\u003csub\u003eobs\u003c\/sub\u003e: spread of readings from observer judgement alone, including bias, when the observer does not know which condition is set\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eJudging the brightness of a faint spark by eye sits near the threshold of vision, where expectation dominates. Wood’s prism swap was in effect a blind control: with the cause removed, S should vanish, and it did not. Sources: R. W. Wood, “The n-Rays”, \u003cem\u003eNature\u003c\/em\u003e 70, 530 (1904), doi:10.1038\/070530a0; APS News, “This Month in Physics History”, Aug 2007.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e Wood made other tests too; this design keeps to the prism story. Blondlot was a respected physicist, and the episode is a warning about method, not a joke about him.\u003c\/p\u003e\u003ch3\u003eIn character\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eI saw them. I swear I saw them, even after the cradle went empty. That is the lesson I carry: the eye finds what the heart expects.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eOn the hoodie\u003c\/h3\u003e\u003cp\u003eFront: an empty prism cradle with a dotted spectrum. Back: Enrayne in full pixel art with “BORN 1903 - DIED 29 SEP 1904” and “HE STILL SAW THEM.” Gildan 18500 Heavy Blend hoodie, Black, S to 5XL.\u003c\/p\u003e\u003cp\u003ePart of the \u003cstrong\u003eGhost Particles That Were Wrong\u003c\/strong\u003e set with \u003ca href=\"\/pl\/products\/sir-aetheron-pixel-hoodie\"\u003eSir Aetheron\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/calorus-pixel-hoodie\"\u003eCalorus\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/diphantom-pixel-hoodie\"\u003eDiphantom\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/prematura-pixel-hoodie\"\u003ePrematura\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/thetarch-pixel-hoodie\"\u003eThetarch\u003c\/a\u003e. Browse all \u003ca href=\"\/pl\/collections\/hoodies\"\u003ephysics hoodies\u003c\/a\u003e, more \u003ca href=\"\/pl\/collections\/electromagnetism\"\u003eelectromagnetism designs\u003c\/a\u003e, or the \u003ca href=\"\/pl\/collections\/deep-cuts\"\u003eDeep Cuts\u003c\/a\u003e.\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"Black \/ S","offer_id":50964467581031,"sku":"46222158712318947529","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":50964467613799,"sku":"97765360616890677820","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":50964467646567,"sku":"89969539674633512609","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":50964467679335,"sku":"25766894198004153497","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":50964467712103,"sku":"12980833173745820419","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":50964467744871,"sku":"26942251648958401363","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":50964467777639,"sku":"71792467814026907098","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":50964467810407,"sku":"33344964816125237008","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/03_H05_0d098cb9-e2c2-45fb-86ea-67451bbb4d2a.png?v=1793678428"},{"product_id":"calorus-pixel-hoodie","title":"Calorus – The Caloric Theory of Heat Pixel Hoodie","description":"\u003cp\u003eCalorus, a bronze-armoured knight with a sealed glass chest-plate of glowing fluid, is pierced by a blunt borer; from the wound pours heat-shimmer, not fluid, and the vessel stays full.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eAntoine Lavoisier’s \u003cem\u003eTraité élémentaire de chimie\u003c\/em\u003e (1789) listed caloric, a conserved, weightless heat fluid, among the elements. In 1798 Count Rumford reported that boring a cannon with a blunt borer kept producing heat seemingly without limit, enough to boil water in about two and a half hours, and argued that heat is a form of motion. The fluid picture faded around 1850, when J. P. Joule’s “On the mechanical equivalent of heat” and Rudolf Clausius’s founding paper of thermodynamics made heat a transfer of energy, not a substance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eΔU = Q − W\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eJoule 1850: 772 ft·lbf per Btu  ≈ 4.15 J per calorie   (modern: 1 cal\u003csub\u003eth\u003c\/sub\u003e = 4.184 J exactly)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eΔU: change in a system’s internal energy (J)\u003c\/li\u003e\n\u003cli\u003eQ: heat added to the system (J)\u003c\/li\u003e\n\u003cli\u003eW: work done by the system (J)\u003c\/li\u003e\n\u003cli\u003eft·lbf: foot-pound-force, ≈ 1.356 J\u003c\/li\u003e\n\u003cli\u003eBtu: heat to warm one pound of water by 1 °F, ≈ 1055 J\u003c\/li\u003e\n\u003cli\u003ecal\u003csub\u003eth\u003c\/sub\u003e: thermochemical calorie (J)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe first law says heat and work are two ways of moving the same energy, so there is no stock of caloric to run out of, and none to conserve. Rumford’s borer converted mechanical work W into internal energy indefinitely. Sources: Rumford, \u003cem\u003ePhil. Trans. R. Soc.\u003c\/em\u003e 88, 80 (1798), doi:10.1098\/rstl.1798.0006; Joule, \u003cem\u003ePhil. Trans. R. Soc.\u003c\/em\u003e 140, 61 (1850), doi:10.1098\/rstl.1850.0004; Clausius, \u003cem\u003eAnn. Phys.\u003c\/em\u003e 155, 368 (1850), doi:10.1002\/andp.18501550306.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e Heat-fluid ideas are older than 1789; Lavoisier named and listed caloric. Rumford’s result was not accepted as decisive at the time, and 1850 is a conventional end date, marked by Joule’s and Clausius’s 1850 papers; caloric theory faded gradually.\u003c\/p\u003e\u003ch3\u003eIn character\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eThey pierced me and waited for me to drain. I never did. Whatever pours out of me is motion, and the more they bore, the more I give.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eOn the hoodie\u003c\/h3\u003e\u003cp\u003eFront: a cracked glass flask holding a flame, with a borer across it. Back: Calorus in full pixel art with the character name and printed dates for the theory (RUMFORD 1798 - JOULE 1850). Gildan 18500 Heavy Blend hoodie, Black, S to 5XL.\u003c\/p\u003e\u003cp\u003ePart of the \u003cstrong\u003eGhost Particles That Were Wrong\u003c\/strong\u003e set with \u003ca href=\"\/pl\/products\/sir-aetheron-pixel-hoodie\"\u003eSir Aetheron\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/enrayne-pixel-hoodie\"\u003eEnrayne\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/diphantom-pixel-hoodie\"\u003eDiphantom\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/prematura-pixel-hoodie\"\u003ePrematura\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/thetarch-pixel-hoodie\"\u003eThetarch\u003c\/a\u003e. Browse all \u003ca href=\"\/pl\/collections\/hoodies\"\u003ephysics hoodies\u003c\/a\u003e, more \u003ca href=\"\/pl\/collections\/thermodynamics-t-shirts\"\u003ethermodynamics designs\u003c\/a\u003e, or the \u003ca href=\"\/pl\/collections\/deep-cuts\"\u003eDeep Cuts\u003c\/a\u003e.\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"Black \/ S","offer_id":50964467875943,"sku":"30415561719805009476","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":50964467908711,"sku":"15448148543604733055","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":50964467941479,"sku":"65091056722388620558","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":50964467974247,"sku":"76945071081196408436","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":50964468007015,"sku":"25708564579182111490","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":50964468039783,"sku":"29606816254305219352","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":50964468072551,"sku":"31385764956232233152","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":50964468105319,"sku":"13291385646835404039","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/03_H14_d3e5dd7f-b9ca-4288-847d-5206062addb0.png?v=1793678437"},{"product_id":"diphantom-pixel-hoodie","title":"Diphantom – The 750 GeV Diphoton Excess Pixel Hoodie","description":"\u003cp\u003eDiphantom, a spectral knight made of two crossing beams of light, carries a small flickering bump at his heart while a skyline of histogram bars falls away behind him.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eOn 15 December 2015 the ATLAS and CMS collaborations each showed a small excess of photon pairs with invariant mass near 750 GeV in the first 13 TeV LHC data. A new heavy boson decaying to two photons would show up as exactly such a bump above the smoothly falling background. Hundreds of theory papers followed. With roughly four to five times more data (ATLAS 15.4 fb⁻¹ in 2016 against 3.2 fb⁻¹ in 2015; CMS 12.9 fb⁻¹ against 3.3 fb⁻¹), both experiments reported at ICHEP on 5 August 2016 that the excess had gone. It was a statistical fluctuation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003em\u003csub\u003eγγ\u003c\/sub\u003e² c⁴ = 2 E₁ E₂ (1 − cos θ)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003em\u003csub\u003eγγ\u003c\/sub\u003e: invariant mass of the photon pair (GeV\/c²)\u003c\/li\u003e\n\u003cli\u003eE₁, E₂: measured photon energies (GeV)\u003c\/li\u003e\n\u003cli\u003eθ: opening angle between the two photons in the lab frame\u003c\/li\u003e\n\u003cli\u003ec: speed of light\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhen many mass bins are searched, an excess somewhere is likely by chance (the look-elsewhere effect), so its local significance overstates the global one. Sources: ATLAS briefing, “High-mass di-photon resonances: the first 2016 ATLAS results” (Aug 2016); CMS ICHEP 2016 public results; Physics World, Aug 2016.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e Nothing was wrong with the detectors or analyses; small samples fluctuate. The data rule out this particular bump, not every heavy diphoton resonance.\u003c\/p\u003e\u003ch3\u003eIn character\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eFor eight months I wore a crown of a thousand papers. Then the data grew, and I was what I always was: noise, standing a little too tall.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eOn the hoodie\u003c\/h3\u003e\u003cp\u003eFront: two crossing photon lines with a hollow dot at the crossing. Front label: “750 GeV DIPHOTON · FADED 2016”. Back: Diphantom in full pixel art with “BORN 15 DEC 2015 - DIED 5 AUG 2016” and “A FLUCTUATION WEARING A CROWN.” Gildan 18500 Heavy Blend hoodie, Black, S to 5XL.\u003c\/p\u003e\u003cp\u003ePart of the \u003cstrong\u003eGhost Particles That Were Wrong\u003c\/strong\u003e set with \u003ca href=\"\/pl\/products\/sir-aetheron-pixel-hoodie\"\u003eSir Aetheron\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/enrayne-pixel-hoodie\"\u003eEnrayne\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/calorus-pixel-hoodie\"\u003eCalorus\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/prematura-pixel-hoodie\"\u003ePrematura\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/thetarch-pixel-hoodie\"\u003eThetarch\u003c\/a\u003e. Browse all \u003ca href=\"\/pl\/collections\/hoodies\"\u003ephysics hoodies\u003c\/a\u003e, more \u003ca href=\"\/pl\/collections\/particle-physics\"\u003eparticle \u0026amp; nuclear physics designs\u003c\/a\u003e, or the \u003ca href=\"\/pl\/collections\/deep-cuts\"\u003eDeep Cuts\u003c\/a\u003e.\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"Black \/ S","offer_id":50964468367463,"sku":"10237940436925301286","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":50964468400231,"sku":"20341608686246934641","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":50964468432999,"sku":"25462335692149801443","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":50964468465767,"sku":"19100754457203331811","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":50964468498535,"sku":"33619771665418655161","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":50964468531303,"sku":"16636946075454964806","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":50964468564071,"sku":"30942987810949317717","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":50964468596839,"sku":"18847333557252584756","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/03_H15_d3152f2e-bdfd-4579-a005-7d7d6d4fad72.png?v=1793678447"},{"product_id":"prematura-pixel-hoodie","title":"Prematura – The OPERA Faster-Than-Light Neutrino Anomaly Pixel Hoodie","description":"\u003cp\u003ePrematura, a lean herald-knight, strides one step ahead of his own glowing shadow, a loose cable dangling from his gauntlet.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eOn 23 September 2011 the OPERA experiment reported muon neutrinos from CERN arriving at Gran Sasso, about 730 km away, (60.7 ± 6.9 ± 7.4) ns earlier than light would, an apparent faster-than-light result implying (v − c)\/c = (2.48 ± 0.28 ± 0.30) × 10⁻⁵. In February 2012 the collaboration found two equipment faults: a badly connected optical-fibre connector on the GPS timing link, which added about 73 ns of delay and made the flight time look shorter, and a master-clock oscillator running slightly fast, which pushed the other way. ICARUS measured light-speed-consistent arrival times in March 2012, and on 8 June 2012 OPERA and the other Gran Sasso experiments reported results consistent with c.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eδt = L\/c − t\u003csub\u003eν\u003c\/sub\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e(v − c)\/c ≈ c δt \/ L\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eδt: early arrival of the neutrinos relative to light (s)\u003c\/li\u003e\n\u003cli\u003eL: CERN-to-Gran Sasso baseline, about 730 km (m)\u003c\/li\u003e\n\u003cli\u003ec: speed of light, 299 792 458 m s⁻¹\u003c\/li\u003e\n\u003cli\u003et\u003csub\u003eν\u003c\/sub\u003e: measured neutrino time of flight (s)\u003c\/li\u003e\n\u003cli\u003ev: inferred neutrino speed (m s⁻¹)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith L ≈ 730 km the light travel time is about 2.4 ms, so 60 ns is a 2.5 × 10⁻⁵ effect. Supernova 1987A neutrinos had already bounded (v − c)\/c far more tightly at lower energy. Sources: OPERA, arXiv:1109.4897; ICARUS, \u003cem\u003ePhys. Lett. B\u003c\/em\u003e 713, 17 (2012); OPERA, \u003cem\u003eJHEP\u003c\/em\u003e 10 (2012) 093; CERN press release, 23 Sep 2011 (update 8 Jun 2012).\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The neutrinos were never wrong; the measurement was. “It was the cable” is a simplification: two faults pulled in opposite directions, and the fibre was the bigger one.\u003c\/p\u003e\u003ch3\u003eIn character\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eI arrived sixty nanoseconds early and the world held its breath. Then someone checked the plug. I was never ahead of the light, only ahead of the clock.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eOn the hoodie\u003c\/h3\u003e\u003cp\u003eFront: a fibre plug with a light gap and a dashed arrow. Front label: “OPERA FTL CLAIM · REFUTED 2012”. Back: Prematura in full pixel art with “BORN 23 SEP 2011 - DIED 8 JUN 2012” and “IT WAS THE CABLE.” Gildan 18500 Heavy Blend hoodie, Black, S to 5XL.\u003c\/p\u003e\u003cp\u003ePart of the \u003cstrong\u003eGhost Particles That Were Wrong\u003c\/strong\u003e set with \u003ca href=\"\/pl\/products\/sir-aetheron-pixel-hoodie\"\u003eSir Aetheron\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/enrayne-pixel-hoodie\"\u003eEnrayne\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/calorus-pixel-hoodie\"\u003eCalorus\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/diphantom-pixel-hoodie\"\u003eDiphantom\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/thetarch-pixel-hoodie\"\u003eThetarch\u003c\/a\u003e. Browse all \u003ca href=\"\/pl\/collections\/hoodies\"\u003ephysics hoodies\u003c\/a\u003e, more \u003ca href=\"\/pl\/collections\/particle-physics\"\u003eparticle \u0026amp; nuclear physics designs\u003c\/a\u003e, or the \u003ca href=\"\/pl\/collections\/deep-cuts\"\u003eDeep Cuts\u003c\/a\u003e.\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"Black \/ S","offer_id":50964468662375,"sku":"41884972481716868349","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":50964468695143,"sku":"22357627898620936775","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":50964468727911,"sku":"19450815920967072780","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":50964468760679,"sku":"10247419536980902274","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":50964468793447,"sku":"10026433366790311234","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":50964468826215,"sku":"24911543395893396281","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":50964468858983,"sku":"18293210009403699799","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":50964468891751,"sku":"20474148342641469237","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/03_H02_0b8fe972-67b1-4f6b-8e67-303b4c92e6a0.png?v=1793678457"},{"product_id":"thetarch-pixel-hoodie","title":"Thetarch – The Θ⁺(1540) Pentaquark Pixel Hoodie","description":"\u003cp\u003eThetarch, a pretender-king in tarnished violet plate, wears a crown of five jewels, four warm and one cold, whose linking thread is snapping.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eIn 2003 the LEPS collaboration at SPring-8 reported a narrow peak near 1540 MeV in the K⁺n system, read as an exotic five-quark baryon, the Θ⁺, with minimal content uudd s̄. Its positive strangeness could not be made from three quarks, which is what made it exotic. Several other groups quickly reported sightings, but higher-statistics searches found nothing, and the Particle Data Group’s 2008 review judged the case that the Θ⁺ does not exist to be compelling, describing the whole story as a curious episode in the history of science.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eΘ⁺ = u u d d s̄:   Q = +1,  B = +1,  S = +1\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eu, d: up and down quarks, charges +2\/3 e and −1\/3 e\u003c\/li\u003e\n\u003cli\u003es̄: strange antiquark, charge +1\/3 e, strangeness +1\u003c\/li\u003e\n\u003cli\u003eQ: electric charge in units of e\u003c\/li\u003e\n\u003cli\u003eB: baryon number (each quark +1\/3, antiquark −1\/3)\u003c\/li\u003e\n\u003cli\u003eS: strangeness\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eOrdinary baryons qqq cannot have S = +1, so a narrow K⁺n resonance would have been unambiguous. The early peaks came from small samples and background modelling. Sources: T. Nakano et al. (LEPS), \u003cem\u003ePhys. Rev. Lett.\u003c\/em\u003e 91, 012002 (2003); C. Amsler et al. (PDG), “Pentaquark update”, \u003cem\u003ePhys. Lett. B\u003c\/em\u003e 667, 1 (2008).\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e Only this pentaquark is a ghost. Hidden-charm pentaquarks of a different kind were observed by LHCb in 2015. The 1540 MeV mass is approximate (about 1.53 to 1.54 GeV in early reports).\u003c\/p\u003e\u003ch3\u003eIn character\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eFive jewels, they said, and a throne of my own. But the thread would not hold under more light, and the crown was only ever borrowed.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eOn the hoodie\u003c\/h3\u003e\u003cp\u003eFront: a five-jewel ring with one jewel hollow. Back: Thetarch in full pixel art with “BORN 2003 - DIED 2008” and “FIVE QUARKS, ZERO PARTICLE.” Gildan 18500 Heavy Blend hoodie, Black, S to 5XL.\u003c\/p\u003e\u003cp\u003ePart of the \u003cstrong\u003eGhost Particles That Were Wrong\u003c\/strong\u003e set with \u003ca href=\"\/pl\/products\/sir-aetheron-pixel-hoodie\"\u003eSir Aetheron\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/enrayne-pixel-hoodie\"\u003eEnrayne\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/calorus-pixel-hoodie\"\u003eCalorus\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/diphantom-pixel-hoodie\"\u003eDiphantom\u003c\/a\u003e, \u003ca href=\"\/pl\/products\/prematura-pixel-hoodie\"\u003ePrematura\u003c\/a\u003e. Browse all \u003ca href=\"\/pl\/collections\/hoodies\"\u003ephysics hoodies\u003c\/a\u003e, more \u003ca href=\"\/pl\/collections\/particle-physics\"\u003eparticle \u0026amp; nuclear physics designs\u003c\/a\u003e, or the \u003ca href=\"\/pl\/collections\/deep-cuts\"\u003eDeep Cuts\u003c\/a\u003e.\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"Black \/ S","offer_id":50964469055591,"sku":"15472995321786188732","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ M","offer_id":50964469088359,"sku":"24802921168101708604","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ L","offer_id":50964469121127,"sku":"13900074891296054172","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ XL","offer_id":50964469153895,"sku":"31893557861827652449","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 2XL","offer_id":50964469186663,"sku":"20591729413732960410","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 3XL","offer_id":50964469219431,"sku":"25440209351725703863","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 4XL","offer_id":50964469252199,"sku":"15793698387747725447","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Black \/ 5XL","offer_id":50964469284967,"sku":"24907106921285903727","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/03_H13_31727e01-b77b-45fe-8abb-bc407d8ef051.png?v=1793678467"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/collections\/ghost-particles.png?v=1793677992","url":"https:\/\/pixelatedphysics.com\/pl\/collections\/ghost-particles.oembed","provider":"Pixelated Physics","version":"1.0","type":"link"}