Sand a écrit :Le_navire a écrit :Quelqu'un peut m'expliquer plus clairement siouplait ?
La nouvelle mesure ne donne pas le même chiffre que l'ancienne mesure.
Mais à cette échelle on peut parler de sodomiser les femtodyptères...
Pas du tout. C'est une découverte énorme. Comme écrit dans l'article (Cf. abstract ci-dessous), cette différence correspond à 5 déviations standards.
C'est tout simplement énorme.
Exemple tirée de notre ami wiki : taille moyenne d'un adulte mâle US=178cm, une déviation standard=8cm.
"For example, the average height for adult men in the United States is about 70 inches (178 cm), with a standard deviation of around 3 in (8 cm). This means that most men (about 68 percent, assuming a normal distribution) have a height within 3 in (8 cm) of the mean (67–73 in/170–185 cm)"
L’équivalent en physiques ou en mathématiques (mais j'extrapole les spécialistes qui passent me corrigeront) serait de publier, grâce à des instruments de mesure plus efficace que la vitesse de la lumière est en fait C=230 000 km/s ou que pi=3.3212.
C'est le plus gros coup de massue en découverte en physique de ces x dernières années.
Cela remet potentiellement en cause une majorité de nos "connaissance" en physique de haut niveau.
J'espère qu'il y a un artefact quelque part
The size of the proton
Vol 466|8 July 2010| doi:10.1038/nature
Randolf Pohl, Aldo Antognini, Francois Nez, Fernando D. Amar, et al.
The proton is the primary building block of the visible Universe, but many of its properties—such as its charge radius and its anomalous magnetic moment—are not well understood. The root-mean-square charge radius, rp, has been determined with an accuracy of 2 per cent (at best) by electron–proton scattering experiments1, 2. The present most accurate value of rp (with an uncertainty of 1 per cent) is given by the CODATA compilation of physical constants3. This value is based mainly on precision spectroscopy of atomic hydrogen4, 5, 6, 7 and calculations of bound-state quantum electrodynamics (QED; refs 8, 9). The accuracy of rp as deduced from electron–proton scattering limits the testing of bound-state QED in atomic hydrogen as well as the determination of the Rydberg constant (currently the most accurately measured fundamental physical constant3). An attractive means to improve the accuracy in the measurement of rp is provided by muonic hydrogen (a proton orbited by a negative muon); its much smaller Bohr radius compared to ordinary atomic hydrogen causes enhancement of effects related to the finite size of the proton. In particular, the Lamb shift10 (the energy difference between the 2S1/2 and 2P1/2 states) is affected by as much as 2 per cent. Here we use pulsed laser spectroscopy to measure a muonic Lamb shift of 49,881.88(76) GHz. On the basis of present calculations11, 12, 13, 14, 15 of fine and hyperfine splittings and QED terms, we find rp = 0.84184(67) fm, which differs by 5.0 standard deviations from the CODATA value3 of 0.8768(69) fm. Our result implies that either the Rydberg constant has to be shifted by −110 kHz/c (4.9 standard deviations), or the calculations of the QED effects in atomic hydrogen or muonic hydrogen atoms are insufficient.
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