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 4:51 PM

How Dharavi, Asia’s biggest slum, fought against COVID-19

Imagine a place where 8-10 people live in 100 square feet structures. A place which squeezes close to 6,50,000 people, 5,000 small factories, and about 15,000 single-room workshops in just 2.5 square kilometer area. Welcome to  Dharavi, the biggest slum of Asia situated in the heart of fashion, entertainment, and commercial capital of India, Mumbai.

When the first COVID-19 case was discovered in Dharavi, it caused massive panic among the citizens as well as officials. Social distancing is virtually impossible to achieve in Dharavi, which is a maze of narrow congested lanes with tenements on either side of it and where 80% of the population use community toilets.

With their fingers crossed, people were speculating about Dharavi turning into a graveyard. These fears turned out to be misplaced and three months later Dharavi won praise from the WHO for effectively restricting the spread of coronavirus. According to the official data, the COVID-19 case doubling rate improved greatly, from 18 days in April, to 43 days in May, to 108 days in June, and 480 days in July.

Mr. Kiran Dighavkar, Assistant Commissioner of the top civic body of Mumbai, Brihanmumbai Municipal Corporation (BMC) said that their undertaking of an aggressive strategy of 4T’s - Tracing, Tracking, Testing & Treating, is the key to Dharavi’s successful fightback against the pandemic. The fightback plan was aptly coined "Mission Dharavi".

Extensive screening and testing of residents was done to detect the symptoms for coronavirus in "fever camp" which were set up by medical workers in different parts of the slum everyday. Many buildings such as schools, wedding halls, and sports complexes were overtaken by the civic authorities and were repurposed as quarantine facilities. A 200-bed hospital was also set up in record 14 days.

The BMC commissioner, I S Chahal said “Proactive screening helped in early detection, timely treatment and recovery.” Close to six hundred thousand people were screened, 14,000 people tested and 13,000 quarantined in nearby institutions, schools, marriage halls, and sports complexes. Furthermore, continuous monitoring of people’s movement using drones helped reinforce containment measures and scaled progress swiftly.

To further strengthen the measure, locals of the community emerged as “COVID Yodhas” (warriors) to address the concerns, a senior official said.  Many well endowed citizens and NGO’s provided Free meals, ration, PPE gear, oxygen cylinders, gloves, masks, medicines, and ventilators to residents and doctors.th July

On 8th July 2020 Dharavi recorded a total of 2,335 COVID-19 out of which 1,735 patients have recovered and there are only 352 active cases at present. Only 82 deaths were recorded in Dharavi till 8th July as against more than 4500 in the whole of Mumbai.

This phenomenal success has given the world a yet simple and effective technique in curbing the spread of the deadly virus. World Health Organization (WHO) chief Tedros Adhanom Ghebreyesus, in a virtual press conference in Geneva, acknowledging the efforts of various nations and Dharavi to contain the virus, said that “There are many examples from around the world that have shown that even if the outbreak is very intense, it can still be brought back under control”. Further, he added, “And some of these examples are Italy, Spain, and South Korea, and even in Dharavi -- a densely packed area in the megacity of Mumbai -- a strong focus on community engagement and the basics of testing, tracing, isolating and treating all those that are sick is key to breaking the chains of transmission and suppressing the virus.”

Read More