Friday, July 17, 2020

Discovery of a new particle: A Charming Tetraquark

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Hardi Talwani

Article Title

Discovery of a new particle: A Charming Tetraquark

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Global Views 360

Publication Date

July 17, 2020

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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.

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February 4, 2021 5:06 PM

How can Science Communication save the day

Pierre-Simon Laplace, an exemplary French Mathematician, once quoted: “It is India that gave us the ingenious method of expressing all numbers by means of ten symbols, each symbol receiving a value of position as well as an absolute value; a profound and important idea which appears so simple to us now that we ignore its true merit.

I intentionally aimed to start this article with a quote by an excellent western mathematician, because we Indians need validation from westerners. We are quite capable of making high strides in science, technology, and innovation, but there is a lack of vision; lack of confidence.

ISRO Launching a satellite: Source: ISRO

The newly Independent India of 1947 had a vision: a vision to transform into a developed country using scientific interventions. We had some great revolutionaries who worked tirelessly to shape a bright future for our country. Dr. Vikaram Sarabhai founded the Indian Space Research Organization (ISRO) while Dr. Homi J Bhabha, the Department of Atomic Energy (DAE). There was a time when Dr Sarabhai convinced a Church to give land for a rocket launch station.

When India became Independent in 1947, people just wanted to earn enough to survive in the rapidly changing, bitter conditions. Today, when we are one of the economies of the world, we are fighting over temples and mosques, trying to rename cities, and dream of resurrecting some thousands of years old notion of India, the quest for scientific temperament is lost somewhere along the way.

Over the years, India’s spending on Research and Development has increased significantly in overall value but its share in GDP has remained stagnant at 0.6-0.9%. The research being done in India is quite good if we compare it to the funding received. However if we compare it with the developed countries, the gap is phenomenal.

India’s space program, atomic energy program, development of supercomputers, or development of light combat aircraft- Tejas shows that Indian scientists have given great results at a fraction of the costs of their western counterparts. Still the allocation of funds for the scientific research is well short of what is required to catapult India into the league of developed nations.

If we deep dive into the probable causes of underfunding of Indian scientific research in spite of giving good return on investment, it boils down to the lack of awareness about the same among the larger public as well as policymakers. As we know that the best way to receive funding is to create awareness about a valuable product. We don’t lack products; we lack dialogue. Science is hardly ever reported in India. It’s rarely a point of discourse. When there is no discourse around something, it leads to a lack of interest. This is also driving away the bright students from pure sciences to the technology and management which is more remunerative.  

Another issue that sprouts up from lack of discourse is the lack of belief in science. We have seen how in India, many public figures started spreading home remedies and terrible unchecked solutions like the benefits of Cow Urine during the COVID outbreak. The news channels, instead of discussing facts, talked about conspiracy theories. These news channels sometimes invited scientists for talks, but eventually, ruined everyone’s time for their TRP by asking them about the conspiracy theories.

Science literacy can reduce these pseudoscience tactics. Indians extensively believe in spirituality which is good for personal motivation and values, however the unscrupulous elements have often used it to spread misinformation and personal gains. It's imperative that we take a stand to promote scientific thought, and this is not at all an arduous task. Instead, the solution is straightforward: We need to communicate.

We need our own Neil DeGrasse Tysons, Carl Zimmers, Carl Sagans who can communicate with the common people about scientific development, in a simple language. This will help us to kick start our journey towards the Golden Era of Science without a baggage of baseless beliefs, pseudoscience, and untested products.

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