Friday, July 17, 2020

Discovery of a new particle: A Charming Tetraquark

This article is by

Share this article

Article Contributor(s)

Hardi Talwani

Article Title

Discovery of a new particle: A Charming Tetraquark

Publisher

Global Views 360

Publication Date

July 17, 2020

URL

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.

Support us to bring the world closer

To keep our content accessible we don't charge anything from our readers and rely on donations to continue working. Your support is critical in keeping Global Views 360 independent and helps us to present a well-rounded world view on different international issues for you. Every contribution, however big or small, is valuable for us to keep on delivering in future as well.

Support Us

Share this article

Read More

February 4, 2021 5:10 PM

How is Nigeria fighting Boko Haram

It was in the 2000s that Nigeria first faced the threat of Boko Haram, the affiliate of Islamic State in Africa. As President Muhammadu Buhari completes five years of being in power, which he got primarily for his plank of defeating Boko Haram, the battle still continues.

Buhari won the presidential election in 2015 against then President Goodluck Jonathan by touting his military background as an asset in defeating Boko Haram, which his predecessor was not able to do. While in his first few months as President he did show results by pushing Boko Haram out of some territories, the Nigerian military was unable to maintain the momentum as Boko Haram struck back with new tactics.

General Muhammadu Buhari, President, Nigeria | Source: Chatham House via Wikimedia

There is widespread distrust towards government officials and Buhari’s popularity has also eroded massively. The citizens are making their dissatisfaction known through anti government demonstrations. Meanwhile the administration seems busy playing blame games and guessing at where things are going wrong in the military’s efforts to contain the violence.

In June 2020, Nigeria saw one of its deadliest attacks in recent times, a hard turn from claims by the military in April that a Boko Haram leader appeared ready to surrender “based on body language.”

Boko Haram which means "Western education is prohibited" in the local Hausa dialect, first began in 2002 under Muhammad Yusuf. They called shunning the western influence in the social sphere and called  for the enforcement of sharia even among non-Muslims. Its leader Mohammad Yusuf was killed in police custody in 2009. However the government authorities failed to utilise this opportunity and showed slackness in rehabilitating the group members, who moved underground, regrouped under new leadership, and continuing to terrorise even larger areas.

Image of Boko Haram terrorists | AK Rockefeller via Flickr

Many factors have been considered in piecing together what led to the creation of Boko Haram and how its existence has been sustained, ranging from support from ISIS, ability to internationalize as a group, and possible assistance from Libya.

The US and Europe have been seen as reluctant to extend any real aid, perhaps due to Nigeria’s oil reserves and a desire to keep African countries destabilised to maintain their neo-colonial stronghold in the region. Internally, corruption and laxity in action of troops has often been cited as big hurdles in controlling the situation.

Two Boko Haram vehicles destroyed. | Source: M. Kindzeka via Wikimedia

As for solutions, many have turned their focus towards rebuilding communities in the aftermath of thousands of people being murdered and displaced due to the ongoing violence. Not just civilian casualties, but a disastrous lack of necessities such as food, water and electricity is leading to a humanitarian crisis in the area falling in the conflict zone between Boko Haram and the military.

President Buhari currently seems slow to admit that Boko Haram cannot be “defeated on the battlefield alone.” Apart from improving the military’s response he must also take measures for alleviating poverty, destroying corruption and ‘de-radicalisation’ of those recruited into Boko Haram.

Some localised efforts are being taken to stabilise the situation by empowering communities to resolve conflicts, improving civil infrastructure, and reintegrating reformed militants.

However, localised efforts are short-term in nature, and their stability and success is greatly determined by the government which understands that more than killing the attackers, trust and active participation of its citizens is needed to resolve this conflict

The impact of Boko Haram on the people of Nigeria has been multifold, and the arsenal to ‘defeat’ Boko Haram must be expanded and redefined.

Read More