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 4:45 PM

COVID-19 and Hungary’s steep slide towards Authoritarianism

The Hungarian Prime Minister, Viktor Orban, has used the pandemic of coronavirus to turn Hungary into an authoritarian system. This undermines the fundamental principles of democracy and rule of law in a way that is hard to reconcile as necessary for public health. On 30th March 2020, the Hungarian government passed a bill in the parliament which approved granting his government emergency powers.

Critics have said that the emergency of the coronavirus pandemic has turned Hungarian democracy into a dictatorship. This bill, which turned into a law, diminishes the Parliament’s check on the executive power. This means that elections and referendums will be delayed indefinitely.

Political commentator Zoltan Cegledi told BIRN, “Hungary’s already run as an illiberal democracy, the government’s will to destroy, limit and exhaust democracy is permanent. Its future victims will be the remnants of autonomy. Even before the pandemic threat, they [the government] tried to besiege cultural institutions and representatives while attacking judicial independence.”

The legislation under the law also allows up to five years of imprisonment for anyone who publishes false or misleading information that alarm or agitate the public or undermine the government’s “successful protection”. This also means that it is easy for the executive powers to jail the journalists for doing their job. Political Capital Institute, a Budapest-based think tank also wrote “The remaining checks and balances in Hungary will cease to exist and the country will likely witness a new wave of attacks against the free press,” while analysing the bill.

Crucially, the Bill on Protection Against Coronavirus, now a law, does not have any sunset clause. This means the law allows the government to decide when (or if) to end the state of emergency. Hungary’s democratic opposition said that even though they had concerns over a number of elements in the bill, they were willing to overlook it in the emergency situation as long as the sunset clause was introduced. However, the ruling party had made it clear that it was not willing to back down over the sunset clause.

Lydia Gall, a senior researcher at the Human Rights Watch said that Orban had already “weaponized coronavirus to stoke xenophobia” after claiming that coronavirus was imported to Hungary by Iranian students.

The question now arises is why Orban is doing this? There are two reasons. One, this labels the opposition as the “supporters of the coronavirus”, instead of supporters of the people, which will win his government the political debate in advance. Two, Orban sees this as the perfect time for a power grab. Every country is dealing with how to save the lives of its citizens and avoid a total economic collapse- this makes the country more inward-looking, which means that the foreign policy, in general, becomes less important and human rights and the rule of law in other countries become issues of less importance for most politicians and citizens, even though that should not be the case. When there is a death threat, the citizens of a country have a more narrow view. This is how Orban’s strategy of a power grab would work perfectly in the time of an emergency like a pandemic. Rights groups and government critics have said that while it is clear that coronavirus brings extraordinary challenges, there need to be checks and balances in place for the government, especially given Orban trying to challenge the democracy of Hungary since the past ten years since he has been in power.

Orban is not alone in seeing the pandemic as an opportunity to invoke emergency powers and turn a democratic state into an authoritarian one. But this enabling act represents his latest step along the autocratic path he embarked on a decade ago.

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