2021-10-25

Lhcb experiment leads to new thinking or mysterious forces affect the particle decay of meiquark

By yqqlm yqqlm

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2bed657075a5f16 - Lhcb experiment leads to new thinking or mysterious forces affect the particle decay of meiquark

completely reconstructed lhcb events, mesons and other particles are displayed in different colors. (from: CERN)

it is reported that the standard model describes all the known particles that make up the universe and the interaction between them. Although scientists have tried their best to carry out all experiments, physicists know that the current theory is not complete

for example, it is impossible to explain how gravity and matter produced during the big bang, and no particles can explain why dark matter is five times that of the observable universe

for a long time, physicists have been trying to find physical phenomena beyond the standard model, and the lhcb event is expected to uncover a small part of the mystery

Lhcb experiment leads to new thinking or mysterious forces affect the particle decay of meiquark

sci tech daily pointed out that one of the best ways to find new particles and forces is to conduct in-depth research on particles called mequarks

due to its incredibly short lifetime (only one trillionth of a second on average), it is easy to transform or decay into other particles before it is observed

the good news is that the giant accelerator of CERN – the Large Hadron Collider (LHC) – produces billions of us quarks every year and is recorded by a specially built lhcb detector

Lhcb experiment leads to new thinking or mysterious forces affect the particle decay of meiquark(1)

research diagram – 1: mass distribution of matching model (arXiv. ORG)

in addition, it should be pointed out that the decay mode of mequark will be affected by the presence of undiscovered forces or particles

in March, the results released by another team of physicists from lhcb showed that the frequency of meiquarks decaying into mesons was lower than that of their lighter cousin electrons

this cannot be explained in the standard model because of its impact on electrons and μ Children are treated equally. The weight of electrons aside is only μ With the fact that the quark is 1 / 200, researchers believe that the quark should decay into mesons and electrons at an equal rate

however, lhcb physicists found that, μ The frequency of electron decay is only about 85% of that of electron decay

Lhcb experiment leads to new thinking or mysterious forces affect the particle decay of meiquark(2)

research diagram – 2: mass distribution of another matching model (PDF)

in view of the experimental error of about three units between lhcb results and the standard model (particle physics expressed as 3 sigma), it means that it can be attributed to “statistical fluke” The probability is only about one in a thousand

assuming that the result is correct, the most likely explanation is that a new force is pulling electrons and mesons of different intensities, and it is interfering with the decay mode of these beautiful quarks

but to confirm this, more data are needed to further reduce the experimental error. Only when the result reaches the threshold of 5 Sigma – that is, the probability of random initiation is less than one in a million – will it be faced up to by particle physicists