Cern: scientists discover four new particles – here’s why they matter

This month is a time to celebrate. Cern has just announced the discovery of four brand new particles at the Large Hadron Collider (LHC) in Geneva. This means that the LHC has now found a total of 59 new particles, in addition to the Nobel prize-winning Higgs boson, since it started colliding protons – particles that make up the atomic nucleus along with neutrons – in 2009. Excitingly, while some of these new particles were expected based on our established theories, some were altogether more surprising.

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Tau.Neutrino said:

Cern: scientists discover four new particles – here’s why they matter

This month is a time to celebrate. Cern has just announced the discovery of four brand new particles at the Large Hadron Collider (LHC) in Geneva. This means that the LHC has now found a total of 59 new particles, in addition to the Nobel prize-winning Higgs boson, since it started colliding protons – particles that make up the atomic nucleus along with neutrons – in 2009. Excitingly, while some of these new particles were expected based on our established theories, some were altogether more surprising.

more…

I really thought they crossed the line when they handed out a Nobel to a lowly boson.

sibeen said:

Tau.Neutrino said:

Cern: scientists discover four new particles – here’s why they matter

This month is a time to celebrate. Cern has just announced the discovery of four brand new particles at the Large Hadron Collider (LHC) in Geneva. This means that the LHC has now found a total of 59 new particles, in addition to the Nobel prize-winning Higgs boson, since it started colliding protons – particles that make up the atomic nucleus along with neutrons – in 2009. Excitingly, while some of these new particles were expected based on our established theories, some were altogether more surprising.

more…

I really thought they crossed the line when they handed out a Nobel to a lowly boson.

“Although seven Nobel Prizes were awarded for research related to S N Bose’s concepts of the boson, Bose–Einstein statistics and Bose–Einstein condensate, Bose himself was not awarded a Nobel Prize.”

“The LHC has now discovered 59 new hadrons. These include the tetraquarks most recently discovered, but also new mesons and baryons. All these new particles contain heavy quarks such as “charm” and “bottom”.

What exactly are those 59?

“For a long time, only baryons and mesons were seen in experiments. But in 2003, the Belle experiment in Japan discovered a particle that didn’t fit in anywhere. It turned out to be the first of a long series of tetraquarks. In 2015, the LHCb experiment at the LHC discovered two pentaquarks. The four new particles we’ve discovered recently are all tetraquarks with a charm quark pair and two other quarks.”

Tau.Neutrino said:

Cern: scientists discover four new particles – here’s why they matter

This month is a time to celebrate. Cern has just announced the discovery of four brand new particles at the Large Hadron Collider (LHC) in Geneva. This means that the LHC has now found a total of 59 new particles, in addition to the Nobel prize-winning Higgs boson, since it started colliding protons – particles that make up the atomic nucleus along with neutrons – in 2009. Excitingly, while some of these new particles were expected based on our established theories, some were altogether more surprising.

more…

Here’s the CERN press release.

https://home.cern/news/news/physics/59-new-hadrons-and-counting

Includes a picture of all 59 new hadrons.

“So what are these new hadrons, which number 59 in total? Let’s start at the beginning: hadrons are not elementary particles”

“All known hadrons could be described as either consisting of three quarks (forming baryons) or as quark–antiquark pairs (forming mesons), four-quark and five-quark hadrons, known as tetraquarks and pentaquarks.”

“The hadron discoveries from the LHC experiments keep coming, mainly from LHCb, which is particularly suited to studying particles containing heavy quarks. The first hadron discovered at the LHC, χb(3P), was discovered by ATLAS, and the most recent ones include a new excited beauty strange baryon observed by CMS, and four tetraquarks detected by LHCb.”

“The full list of new hadrons found at the LHC, organised by year of discovery (horizontal axis) and particle mass (vertical axis). The colours and shapes denote the quark content of these states.”