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 4:38 PM

Black Lives Matter: Trump, Antifa, and the Anti-Racist movement

As massive protests following the passing of George Floyd kept on shaking the United States. President Donald Trump tweeted on 31st of May that far-left group Antifa was the one behind the violent riots and he would designate it as a terrorist group. He said, “The United States of America will be designating ANTIFA as a Terrorist Organization.” This assertion was repeated by the US Attorney General William Barr as well.

Antifa, short for anti-fascists, is an amorphous movement and not an organization as Trump labels it to be. They tend to be on the left of the U.S. political spectrum, many describing themselves as socialists, anarchists, anti-capitalists or communists. Antifa, according to many commentators, is just a decentralized collection of individual activists who mostly use non-violent methods to achieve their goal, which is to resist the spread of fascism. They track people who spread racist hatred and fascist ideology through on-ground events, traditional media, or social media and use cultural forms of art like drawing, music, film screenings etc. to spread the message of inclusivity. There are more militant anti-fascist groups as well, who mostly engage in non-militant activities but are willing to use more confrontational tactics at times as well. 

This is not the first time that Donald Trump has criticized Antifa to shift the focus away from racial discrimination faced by the black community in USA. In this instance as well President has tried to portray the protestors and looters with a vague phrase “radical-left bad people” and invoking “Antifa” to represent the whole of leftist militant groups which are bound more by belief than by any organizational structure.

Taking a cue from President Trump, many officials, conservative commentators and white supremacists started blaming Antifa for using the “Black Life Matters” movement to indulge in violence and undermining the government of the USA. Mr Trump’s national security adviser, Robert C. O’Brien, had also blamed such activists during his appearances on CNN and A.B.C. News. Mr O’Brien said the F.B.I. needed to “come up with a plan” to deal with Antifa. John Guandolo, who was in the FBI for 13 years, went a step ahead and claimed that Antifa and “Black Life Matters” are communist organizations, who are planning to overthrow the US government. He also praised President Trump for calling Antifa a terrorist organization and lamented that the FBI are unaware of its plan. Fiona Moriarty-McLaughlin, a journalist at the right-wing publication Washington Examiner, re-posted a video purportedly depicting "Paid #Antifa thugs" vandalizing the store — even though there is no evidence to suggest that the vandals were members of the movement.

The FBI and local law enforcement agencies have aggressively pursued charges against rioters, looters and others accused of havoc. However there is no evidence of any involvement of organized violence by Antifa or any other left-wing group. The most serious case that has emerged in federal court involved three men in Nevada linked to a loose, national network of far-right extremists advocating the overthrow of the U.S. government. They were arrested on May 30 on charges of trying to foment violence during Black Lives Matter protests. There are many instances when white thugs were seen vandalizing which blacks feared could be used against them.

The invocation of Antifa by President Trump during the “Black Life Matters” protest is conveniently used by the conservative commentators and white supremacists to somehow shift the focus away from the deep rooted racism in the USA to the violent actions by some protesters during the “Black Life Matter” protest.

As massive protests following the passing of George Floyd kept on shaking the United States. President Donald Trump tweeted on 31st of May that far-left group Antifa was the one behind the violent riots and he would designate it as a terrorist group. He said, “The United States of America will be designating ANTIFA as a Terrorist Organization.” This assertion was repeated by the US Attorney General William Barr as well.

Antifa, short for anti-fascists, is an amorphous movement and not an organization as Trump labels it to be. They tend to be on the left of the U.S. political spectrum, many describing themselves as socialists, anarchists, anti-capitalists or communists. Antifa, according to many commentators, is just a decentralized collection of individual activists who mostly use non-violent methods to achieve their goal, which is to resist the spread of fascism. They track people who spread racist hatred and fascist ideology through on-ground events, traditional media, or social media and use cultural forms of art like drawing, music, film screenings etc. to spread the message of exclusivity. There are more militant anti-fascist groups as well, who mostly engage in non-militant activities but are willing to use more confrontational tactics at times as well. 

This is not the first time that Donald Trump has criticized Antifa to shift the focus away from racial discrimination faced by the black community in USA. In this instance as well President has tried to portray the protestors and looters with a vague phrase “radical-left bad people” and invoking “Antifa” to represent the whole of leftist militant groups which are bound more by belief than by any organizational structure.

Taking a cue from President Trump, many officials, conservative commentators and white supremacists started blaming Antifa for using the “Black Life Matters” movement to indulge in violence and undermining the government of the USA. Mr Trump’s national security adviser, Robert C. O’Brien, had also blamed such activists during his appearances on CNN and A.B.C. News. Mr O’Brien said the F.B.I. needed to “come up with a plan” to deal with Antifa. John Guandolo, who was in the FBI for 13 years, went a step ahead and claimed that Antifa and “Black Life Matters” are communist organizations, who are planning to overthrow the US government. He also praised President Trump for calling Antifa a terrorist organization and lamented that the FBI are unaware of its plan. Fiona Moriarty-McLaughlin, a journalist at the right-wing publication Washington Examiner, re-posted a video purportedly depicting "Paid #Antifa thugs" vandalizing the store — even though there is no evidence to suggest that the vandals were members of the movement.

The FBI and local law enforcement agencies have aggressively pursued charges against rioters, looters and others accused of havoc. However there is no evidence of any involvement of organized violence by Antifa or any other left-wing group. The most serious case that has emerged in federal court involved three men in Nevada linked to a loose, national network of far-right extremists advocating the overthrow of the U.S. government. They were arrested on May 30 on charges of trying to foment violence during Black Lives Matter protests. There are many instances when white thugs were seen vandalizing which blacks feared could be used against them.

The invocation of Antifa by President Trump during the “Black Life Matters” protest is conveniently used by the conservative commentators and white supremacists to somehow shift the focus away from the deep rooted racism in the USA to the violent actions by some protesters during the “Black Life Matter” protest.

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