The scientific collaboration of CERN’s Large Hadron Collider Science has observed possible deviations from the so-called lepton universality between electrons and mesons. If it is confirmed, it indicates that it violates the Standard Model of particle physics.
this experiment LHCb (Large Hadron Collider Beauty) Research institutes at the European Laboratory for Particle Physics (CERN) have observed new results, and if confirmed, they may indicate signs of violation of this standard. Standard Model of Particle Physics.These results were recently announced at the conference Morino At a seminar held by the European Organization for Nuclear Research (CERN).
LHCb is one of the four main experiments of CERN’s Large Hadron Collider, which is located underground near the French-Swiss border near Geneva.It aims to compare two types of Quark Beauty Disintegration, The basic type of particles.In the first disintegration electronic In the second meson, Is another elementary particle similar to electrons, but about 200 times heavier.
Electrons and muons, and called your, Is a lepton type, and the difference between them is called “Flavor‘. The standard model of particle physics predicts that decays involving different flavors of leptons (such as the one in LHCb research) should occur with the same probability. This phenomenon is called leptonic universality and is usually measured by the ratio of the probability of disintegration. measure. In this model, the relationship should be very close.
The latest results show the deviation of the universality of leptons between electrons and mesons: the statistical significance of the results is 3.1 Standard deviation,this means Probability is about 0.1% The data is compatible with the predictions of the standard model.
An LHCb spokesperson said: “If the universality of the leptonic taste is proved to be violated, a new physical process will be required, such as the presence of new particles or basic interactions.” Chris ParkesResearchers from the University of Manchester and the European Organization for Nuclear Research (CERN) pointed out: “Further studies on the process are being carried out using existing data from LHCb. We are very pleased to see whether they can confirm interesting evidence from the current results.
All LHCb data
This deviation is the same as Abnormal pattern In the past ten years, measurements have been made in a similar process through LHCb and other experiments around the world. The new results determine the relationship between the attenuation probabilities with higher accuracy than previous measurements, and for the first time use all the data collected by the LHCb detector so far.
“Although cautious, these results are very exciting because they have always maintained their previous behavior, and now there are more data and more systematic studies that rule out possible experimental effects.” Hope to see the light in the next few months. The new results of similar processes will be the key,” the researchers said. Arantza Oyanguren Campos with Fernando Martinez Vidal, Two IFIC researchers involved in LHCb.
Looking to the future, the LHCb experiment is well placed to clarify the possible existence of the new physical effects implied in the decays analyzed in this study. The LHCb experiment is expected to start collecting new data next year after the detector is updated.
The deviation in the standard deviation between the experimental result (blue) and the theoretical prediction of the new result (RK) (yellow) and the LHCb and similar procedures of other experiments obtained in the past ten years. /IFIC