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 4:50 PM

Has Hollywood finally decided to fight “Reel Life Racism”

Back in the 1960s, when the Civil Rights Movement was slowly gaining momentum in the United States, broadcasting services were employed to gather support for the movement. Images of various kinds of atrocities and violence being rendered to nonviolent Black demonstrators were broadcasted into American houses to raise awareness about the movement.

However, the response of Hollywood so far can be explained in a single word- tragic! Hollywood as a major media and content producer has massively shaped the American culture. However it has not much to show as a positive influence on race issues.

A classic 1940’s musical movie, Holiday Inn had the famous song in which White stars performed in blackface. In a 1980s hit, “Indiana Jones and the Temple of Doom” the Indians are depicted as barbaric and uncivilised. The list of such racial stereotypes is huge to be reproduced here.

Legendary Hollywood actor John Wayne made highly offensive comments in a playboy interview. His exact words are, “I believe in white supremacy until the Blacks are educated to a point of responsibility. I don't believe in giving authority and positions of leadership and judgment to irresponsible people.” He further goes on to make a series of comments, that ideally should not be coming from someone with so much influence in Hollywood.

Many legendary actors and industry icons too have struggled due to racism in Hollywood. Bruce Lee is a fine example of a person who fought against racism in the industry and refused to be cast in many roles that portrayed Chinese people in a negative light. He ultimately moved back to Hong Kong, partly due to the lack of appropriate roles. Actress Lucy Liu has also spoken about how she was too naïve to understand back in the early days as to why her friend would get multiple auditions every day, while she managed two or three in a month.

In 2015, there was a massive uproar regarding the Oscar winners after the academy awarded all 20 nominations to white actors. It quickly gained momentum with the hashtag #OscarsSoWhite becoming a global trend. Before #OscarsSoWhite, no one would have bothered to notice that 86% of top films predominantly featured white actors.

As per a Washington Post survey, film directors who ranked as the most influential decision-makers at Hollywood were predominantly whites. Hollywood might stress for newer reforms against racism on the big screen but that is not the reality at all. To put things into perspective, the Hollywood academy has never revealed information about the diversity of its members involved in the branches of the academy, such as writers, directors, etc.

The response of Hollywood movers and shakers was always akin to a tokenism, a call to push for producing more content involving black writers, producers, and actors.

George Floyd’s death was just the trigger it needed to burst out in the open the pent up anger over the centuries of discrimination, oppression, and systematic injustice meted out to black people. The way black people are portrayed in reel life directly impacts society’s attitude towards them in real life.

People started demanding that Hollywood production companies and studios should involve the people from the community in the decision-making process when the movie plot is based considerably on the members of those communities. They have also demanded that older movies depicting racially insensitive narratives should be taken out of circulation.

Disney, one of the most reputed names in Hollywood, chose to remove the movie “Song of the South” from US distribution, when the criticism for the movie grew, even though it remains available for those who know where to look. They have also announced the plan to revamp the famous Splash Mountain ride at Disneyland and Disney World to include the character of Princess Tiana- Disney’s first African American princess from the movie The Princess and the Frog.

UK TV broadcaster Sky has added a disclaimer to approximately a dozen films stating, “This film has outdated attitudes, language and cultural depictions which may cause offence today."

HBO max recently pulled the iconic film, Gone with the wind because of its controversial depiction of black stereotypes. It returned with a four and a half minute introductory video by black scholar Jaqueline Stewart for a better understanding about racism.

Ever since the resurfacing of the playboy interview of John Wayne, students and alumni at USC have been protesting against Wayne’s exhibit at the campus. However, USC has finally decided to remove the exhibit.

All these reforms are a direct result of the audience being more and more aware of racism and prejudice. However, it is Hollywood’s turn to step up and push for bigger reforms. While it would be a challenging and bold endeavor, Hollywood’s global influence makes it imperative for the industry to undergo much-needed reforms.

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