Monday, June 22, 2020

What is the "Black Lives Matter" movement of USA

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Article Contributor(s)

Kanika Bajaj

Article Title

What is the "Black Lives Matter" movement of USA

Publisher

Global Views 360

Publication Date

June 22, 2020

URL

Black Lives Matter Protest

Black Lives Matter Protest | Source:Lenny DeFranza via Wikimedia

Over 55 years have passed since the signing of civil right laws which were supposed to be the panacea for all the ills of raciest abuses faced by the Black-Americans. A lot has increased since for the Black Americans but much more is still to do. They still live in the fear of law enforcement officials who monitor their movement on the street and also in their homes. The blacks are killed  at the lightest alleged provocation by city police without any fear of serious repercussion. The Federals law enforcement agencies also have a history of racist behavior and brutality towards black Americans.

“Black Lives Matter” movement was started in 2013, after a white person named George Zimmerman was acquitted in the shooting death of African-American teen Trayvon Martin in February 2012. The movement got its name as the hashtag #BlackLivesMatter was widely used on social media to protest the acquittal of George Zimmerman.  This movement aims to highlight the injustices, brutality, oppression, gratuitous killings, systemic racism, ruthlessness, bad form, and unaccountably that American culture, particularly law implementation, harbours toward black individuals. Dissenters have pointed out the uncalled intensity of the police, military weaponry, and impulsive usage of the same. The problem of policing in America is more than just individual bad police officers, the culture protects wrongdoers and rewards blind loyalty and is impervious to change. American citizens have recognized these loopholes and will not tolerate these wrongdoings anymore

On 25th May 2020, a 46-year-old black man named George Floyd, died at the hand of a police officer after allegedly using a counterfeit $20 bill at the convenience store. The killing was extensively covered by the cross section of media across the USA and American public saw the horror of the painful death of an unarmed black person by the police. A national-wide protest erupted as millions of people, including whites came out in the streets,  demanding justice for George Floyd. Slogans such as “I can’t breathe”, “All lives will not matter unless black lives don’t”, “Stop police brutality” were raised on the streets across the cities of America. The “Black Lives Movement” which was hitherto mostly confined to a section of blacks youths, quickly expanded to include a wide section of American citizens. 

In his death George Floyd became the symbol of police brutality against the black community in the USA and brought the “Black Lives Matter” from the fringe to the center of American social and political discourse.

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February 4, 2021 4:49 PM

Discovery of a new particle: A Charming Tetraquark

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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