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The reign theory of particle physics may be flawed , according to new evidence that a subatomic particle decays in a sure elbow room more often than it should , scientists harbinger .
This theory , called theStandard Model , is the best handbook scientist have to describe the tiny bits of matter that make up the universe . But many physicists suspect the Standard Model has some holes in it , and determination like this may point to where those holes are hiding .
This illustration shows a an electron and positron colliding, resulting in a B meson (not shown) and an antimatter B-bar meson, which then decays into a D meson and a tau lepton as well as a smaller antineutrino. In findings reported in June 2012, physicists from the BaBar experiment found that such a decay process happens more often than predicted by the Standard Model of physics.
Inside the BaBar experiment at the SLAC National Accelerator Laboratory in Menlo Park , Calif. , research worker observe collisions between electrons and their antimatter collaborator , positrons ( scientist think all weigh particles have antimatter counterparts with equal multitude but paired mission ) . When these particles collide , they explode into vigor that converts into new particle . These often let in so - calledB - bar mesotron , which are made of both matter and antimatter , specifically a bottom quark and an antiquark . If that was n’t too much of a head ache , this process has the impenetrable moniker " B to D - ace - tau - nu . "
The BaBar researchers were look for a particular disintegration summons where B - bar mesons disintegrate into three other speck : a D meson ( a quark and an antiquark , one of which is"charm " flavour ) , an antineutrino ( the antimatter partner of the neutrino ) and a tau lepton ( a cousin of an electron ) . [ Graphic : Nature ’s Tiniest Particles Explained ]
What they found is that this process manifestly happens more often than the Standard Model predicts it will .
This illustration shows a an electron and positron colliding, resulting in a B meson (not shown) and an antimatter B-bar meson, which then decays into a D meson and a tau lepton as well as a smaller antineutrino. In findings reported in June 2012, physicists from the BaBar experiment found that such a decay process happens more often than predicted by the Standard Model of physics.
" The excess over the Standard Model foretelling is exciting , " BaBar spokesperson Michael Roney of the University of Victoria in Canada said in a statement . " But before we can take an actual discovery , other experiment have to copy it and rule out the possibility this is n’t just an unlikely statistical fluctuation . "
While the BaBar findings are more raw than late bailiwick of these decays , they are not statistically significant enough to claim they acquaint a clear gaolbreak from the Standard Model .
To confirm the finding , more datum will be needed from other experiments , such as the Belle undertaking at the High Energy Accelerator Research Organization ( KEK ) in Tsukuba , Japan , which also producesB mesotron .
" If the supererogatory decays shown are substantiate , it will be exciting to figure out what is causing it , " said BaBar physics coordinator Abner Soffer of Tel Aviv University . " We hope our result will induce theoretic give-and-take about just what the information are tell us about new aperient . "
The BaBar experiment keep particle collisions between 1999 to 2008 , but physicists are still analyzing the data . investigator from the team presented their findings at the 10th annual Flavor Physics and Charge - Parity Violation Conference in Hefei , China , and detail them in a newspaper submitted to the journal Physical Review Letters .
