Ata major particle physics planning meeting this summer, a couple of dozen physicists volunteered to speak on camera about why they do what they do. We at symmetry chose our top five explanations and asked you to vote for your favorite.
Quinn, who grew up in Arkansas, says he had a good idea from about sixth grade on that he wanted to be a physicist. But what solidified that decision, he says, was being chosen during his senior year of high school to participate in a program that brought one student from each state to the Department of Energy's Fermilab for two weeks of classes and activities.
These days, Quinn tries to share that same wonder with students by giving physics presentations to classes from preschool through high school. The demonstration that works for audiences of all ages, he says, is one in which he lies on a bed of nails and has another demonstrator whack with a sledgehammer a cinder block balanced on his stomach. Beyond looking pretty darn impressive, this smashing display helps him teach students about inertia, the conservation of energy and the way pressure is related to force and area.
Particle physicists are seekers, curious wonderers who search out the answers to the big questions: What is the nature of the universe and what is it made of? What are matter, energy, space, and time? How did we get here and where are we going?
Brookhaven National Laboratory is a multipurpose research institution funded by the U.S. Department of Energy. Located on Long Island, NY, Brookhaven operates large-scale facilities for studies in physics, chemistry, biology, medicine, applied science, and advanced technology. The Laboratory's almost 3,000 scientists, engineers, and support staff are joined each year by more than 5,000 visiting researchers from around the world.
Brookhaven Science Associates manages and operates Brookhaven National Laboratory on behalf of the U.S. Department of Energy'sOffice of Science. BSA is a partnership between Battelle and The Research Foundation for the State University of New York on behalfof Stony Brook University. More
Physics Matters is a live and open series of colloquia prepared by the Forum on International Physics (FIP) of the American Physical Society (APS). It is a voluntary association of APS members who are dedicated to advancing the knowledge of physics and its diffusion, by fostering cooperation and communication among physicists accross all countries in the world. The series was conceptualized and initiated by Luisa Cifarelli (then FIP Chair) during the corona pandemic period. It started as an online colloquia series for students and early career scientists in developing countries with a focus on supporting the SESAME light source in Jordan. After a series of 5 prerecorded colloquia that took place during 2020, the Physics Matters series evolved to live online scientific webinars. A colloquium lasts typically 45 minutes and is followed by a question-answers to enable the audience to interact with the distinguished speakers.
Beyond the FIP webpage and community, Physics Matters colloquia are largely advertised and circulated within physics circles and networks. Registration to Physics Matters is fully opened to everybody and from everywhere in the world. For anyone on the planet, upon registration, a zoom link is made available to attend the event. All sessions are recorded, to enhance the sustainability of the information shared. Since December 2020, more than 39 events have taken place, gathering scientists from more than 34 countries, unleashing the capacity for discovering and engaging our audience to share their insights with world renowned experts.
Although initially related to developing countries and in particular SESAME, topics extend to a wide spectrum teaching us why "Physics Matters!". They vary from popular science to education models. The typical audience is 150 registrants, but, as an example, more than 477 participantslistened to Antonio Castro Neto, from the Centre for Advanced 2D Materials Institute for Functional Intelligent Materials of the National University of Singapore, speaking on "Dimensionality in materials science".
Physics Matters also addresses the human and topical aspect of diversity in the middle-east countries, as we could learn from Hafeez Hoorani from Pakistan, or from Muayad M. Abu Saa from the Arab American University in the West Bank. "More than 60% of our members in Iran are women", said Reza Ejtehadi, from the Sharif University of Technology in Tehran, President of the Physics Society of Iran. Quantum information and its development have been described from the Iranian and Swiss perspectives, respectively. Another popular session transported us with "the music of physics", thanks to Eilam Gross, from the Weizmann Institute in Tel Aviv, reshaping a live presentation of a "Science at the bar" event of his.
The Physics Matters series enables new collaborations and collaborative agreements. "Showing the power of neutron and photons sources applied to materials science in Sweden, we were contacted by the City University of Hong Kong", said Aleksandar Matic from Gothenburg University. Another exciting colloquium took place live from China, with He Yuan, Director of the Linac Center of the Institute of Modern Physics of the Chinese Academy of Sciences, describing the Accelerator Driven Systems (ADS) and reconnecting in the audience with worldwide colleagues.
Thanks to our monthly live colloquia series, we are transcending geographical borders and stimulating the frontiers of knowledge for our international audience by connecting the developing communities with the developed ones: reaching and engaging with a growing international community is the Forum on International Physics mindset! So, spread the word and join us in these epic Physics Matters expeditions.
Europhysics News (EPN) is the magazine of the European physics community. It is owned by the European Physical Society (EPS) and produced in cooperation with EDP Sciences. It is distributed to all EPS Individual Members and many institutional subscribers. The total readership is about 54000 per issue. Read more at
EPN aims to provide physicists at all levels, ranging from post graduate students to senior managers working in both industry and the public sector, with a balanced overview of the scientific and organizational aspects of physics and related disciplines at a European level. It does this by publishing review articles, features on advances topics, news reports and items of general interest. SIF promotes the distribution and reading of EPN among its members.
This spring, UT Dallas physics doctoral student Harisankar Namasivayam traveled to Washington, D.C., with a delegation of physicists to brief national policymakers on the importance of fundamental science and, in particular, elementary particle physics.
The USLUA invited Namasivayam and the other presentation winners to join a delegation that also included representatives from the SLAC National Accelerator Laboratory and the Fermi National Accelerator Laboratory on a three-day trip to Washington, D.C.
CERN Courier is essential reading for the international high-energy physics community. Highlighting the latest research and project developments from around the world, CERN Courier offers a unique record of the ongoing endeavour to advance our understanding of the basic laws of nature.
Physics Matter is an asset that defines the physical properties of a physics object, such as its friction or bounciness. In Effect House, Physics Matter can be used to control how objects interact with each other, such as how much they slide or bounce off each other.
Assign Physics Matter to colliders and use them to fine-tune physical interactions between different physics objects in the scene. By adjusting the values of its properties, you can create a wide range of physical behaviors, from slippery ice to bouncy trampolines.
The Big Bang should have created equal amounts of matter and antimatter in the early universe. But today, everything we see from the smallest life forms on Earth to the largest stellar objects is made almost entirely of matter. Comparatively, there is not much antimatter to be found. Something must have happened to tip the balance. One of the greatest challenges in physics is to figure out what happened to the antimatter, or why we see an asymmetry between matter and antimatter.
Antimatter particles share the same mass as their matter counterparts, but qualities such as electric charge are opposite. The positively charged positron, for example, is the antiparticle to the negatively charged electron. Matter and antimatter particles are always produced as a pair and, if they come in contact, annihilate one another, leaving behind pure energy. During the first fractions of a second of the Big Bang, the hot and dense universe was buzzing with particle-antiparticle pairs popping in and out of existence. If matter and antimatter are created and destroyed together, it seems the universe should contain nothing but leftover energy.
Consider a coin spinning on a table. It can land on its heads or its tails, but it cannot be defined as "heads" or "tails" until it stops spinning and falls to one side. A coin has a 50-50 chance of landing on its head or its tail, so if enough coins are spun in exactly the same way, half should land on heads and the other half on tails. In the same way, half of the oscillating particles in the early universe should have decayed as matter and the other half as antimatter.
However, if a special kind of marble rolled across a table of spinning coins and caused every coin it hit to land on its head, it would disrupt the whole system. There would be more heads than tails. In the same way, some unknown mechanism could have interfered with the oscillating particles to cause a slight majority of them to decay as matter. Physicists may find hints as to what this process might be by studying the subtle differences in the behaviour of matter and antimatter particles created in high-energy proton collisions at the Large Hadron Collider. Studying this imbalance could help scientists paint a clearer picture of why our universe is matter-filled.
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