Friday, July 17, 2020

Discovery of a new particle: A Charming Tetraquark

This article is by

Share this article

Article Contributor(s)

Hardi Talwani

Article Title

Discovery of a new particle: A Charming Tetraquark

Publisher

Global Views 360

Publication Date

July 17, 2020

URL

The Large Hadron Collider

The Large Hadron Collider | Source: Anna Pantelia via CERN

While the world is horrified by the novel Coronavirus, scientists at the European Centre for Nuclear Research (CERN) announced the discovery of a never seen before tetraquark. Any finding in particle physics is a phenomenal one because it could tell us a lot about the origins of the universe and how everything came to be. And this discovery is quite charming and quarky (quirky).

Quarks are the elementary particles so any further division of these particles is not possible. This means everything in the universe is ultimately a combination of Quarks. Any new discovery of Quarks  therefore increase our understanding about the origin of universe

When three Quarks come together, they form familiar particles known as Baryons, for instance, protons and neutrons, found in the nucleus of an atom. A tetraquark, in particle physics, is an exotic meson composed of four quarks.

Murray Gell-Mann, recipient of the 1969 Nobel Prize in Physics for his work on the theory of Elementary particles, chose the name ‘Quark’. Another scientist,  George Zweig from CERN also proposed the Quark theory independently of Gell-Mann.

All the new particles are detected using particle accelerators where particles are accelerated at almost the speed of light and collide to look into their subsets. It is like knocking two rocks together so that they break into smaller constituents.

The most recent tetraquark, named X (6900) was discovered by CERN physicists while working on LHCb (Large Hadron Collider beauty experiment). The already known tetraquarks contain a particular combination of two relatively heavy quarks and two light Quarks. On the other hand X(6900) consists of four heavy Quarks: two Quarks and two anti-Quarks.

This exclusive particle made of unusual combinations is a perfect setting for understanding the fundamental force of nature known as Strong Interaction. The strong force is vital to comprehend as it binds together protons, neutrons and the nucleus that ultimately make up matter. Another perk of X(6900)  is its relatively heavy mass, so these are simpler to look at and are more stable as compared to notoriously fast moving-lighter ones.

The paper written by 800 scientists is yet to be peer-reviewed. The bump observed has a statistical significance of more than five sigma (standard deviations) that is good enough to claim the discovery of a new particle.

In any scenario, this unusual discovery will serve as a piece for completing the puzzle of our universe while serving as evidence of the presence of new particles not yet found.

Support us to bring the world closer

To keep our content accessible we don't charge anything from our readers and rely on donations to continue working. Your support is critical in keeping Global Views 360 independent and helps us to present a well-rounded world view on different international issues for you. Every contribution, however big or small, is valuable for us to keep on delivering in future as well.

Support Us

Share this article

Read More

February 4, 2021 5:04 PM

Forced Uyghur labour in China: Getting the World attention now

Since 2017 nearly a million ethnic minorities, mostly Uyghur Muslims from the far Western region of the Xinjiang province of China, have been put in  detention centres. The detainees in these camps are forced to renounce their faith and, in some instances, have been subjected to torture.

The Chinese government has termed the program as a combat against “religious extremism” even as it detains members of ethnic minorities from the region and sends them to the so-called “re-education camps”. The experts however believe that these people have been thrust into a systematic program of cultural genocide.

This campaign now appears to be proceeding towards a new direction wherein the Uyghur detainees are being shipped across the country for forced labour in factories.

As per the government officials, these “trainees” have all “graduated” and are being given employment in the form of factory labour to lead a better life. While China has made this their sole criteria to defend the program, there is mounting evidence that suggests that the Uyghurs are being subjected to forced labour and are not allowed to visit their families in Xinjiang.

According to a report by the Australian Strategic Policy Institute, the Uyghurs have been moved under a labour scheme known as Xinjiang aid to factories across the country straight from the detention centers. Many of these factories are a part of the supply chain network for well-renowned brands such as Apple, Nike, and Dell.

At the factories the workers are forced to live in separate rooms and are required to take Mandarin lessons under heavy surveillance. They are not allowed to leave their jobs and go back to their families in Xinjiang either.

John Oliver, host of popular US TV show “Last Week Tonight” recently aired an episode wherein he talked about the Uyghurs. “If this is the first time that you’re hearing about an estimated million people who’ve been held in detention camps – mostly Uighurs but also Kazakhs and other ethnic minorities – you are not alone. And it’s probably because China has done its level best to keep this story from getting out,” says Oliver.

John Oliver further said, “While there is clearly nothing new about horrific practices being hidden deep within the supply chain of global capitalism, what is happening to the Uighurs is particularly appalling”.

Despite China’s attempts at keeping the entire crackdown private, more and more horrifying details have come out in the open about the atrocities meted out to the Uyghurs via testimonies from former detainees.

This has led to an increased pressure on China as well as the big brands utilizing the Chinese supply chain network, to cut ties with factories where human rights are being violated under this Uyghur crackdown.

The US has restricted 11 Chinese companies from buying American goods due to claims of them being linked to the Xinjiang region. A coalition of over 180 organizations also called out dozens of clothing brands and retailers for links to the Xinjiang crackdown and forced Uyghur labour.

While some companies like PVH, the owner of brands like Calvin Klein and Tommy Hilfiger are working on reducing their presence in the Xinjiang region’s supply chain network others like Big W, a discount department store chain operated by Australia's Woolworths group acknowledged that some of their products might be unintentionally coming from the regions of Xinjiang province.

Companies like Nike, Puma, and Adidas have however continued to deny allegations of links to factories with forced Uyghur labour completely. In their statement Nike said, "We have confirmed with our contract suppliers that they are not using textiles or spun yarn from the region."

With the increasing spotlight on the Chinese government’s repressive activities,  international pressure is increasing on the business groups which depend on China for supply change, to come clean on any link of their vendors with Uyghur forced labour. There might be some hope, even if very little, for the plight of the Chinese Uyghurs after all.

Read More