Symmetry

Scientists think that, under some circumstances, dark matter could generate powerful enough gravitational waves for equipment like LIGO to detect. Now that observatories have begun to record gravitational waves on a regular basis, scientists are discussing how dark matter—only known so far to interact with other matter only through gravity—might create these gravitational waves.

One of the latest discoveries from the LHC takes the properties of photons beyond what your electrodynamics teacher will tell you in class. For most of the year, the LHC collides protons, but for about a month each fall, the LHC switches things up and collides heavy atomic nuclei, such as lead ions. The main purpose of these lead collisions is to study a hot and dense subatomic fluid called the quark-gluon plasma, which is harder to create in collisions of protons. But these ion runs also enable scientists to turn the LHC into a new type of machine: a photon-photon collider.

A re-examination of a particle discovered in 2015 has scientists debating its true identity. A recent analysis by the LHCb collaboration at CERN raises questions about the identity of this pentaquark—and may have taken scientists back to square one in the search for a particle that could shed light on questions about color.

Some theorists have taken to designing their own experiments to broaden the search for dark matter. The trend of theorists proposing experiments has become so common that it’s almost expected of new students entering the field. The hope is that flooding the field with new ideas could finally lead to the discovery of dark matter.

Students come into science from a variety of backgrounds, facing a variety of circumstances. The Fisk-Vanderbilt Master’s-to-Ph.D. Bridge Program, a partnership between Fisk and Vanderbilt universities in Nashville, is meant to take that into account. It helps students overcome external hurdles to reach their potential in Ph.D.-level STEM research. Meet three scientists connected by the program.

Video games and physics have more in common than you might think. Both require a willingness to approach a problem from multiple different directions. Read three ways to succeed when dealing with both subatomic and virtual realms.

Respondents to Symmetry’s survey about what it’s like to earn a Ph.D. in particle physics or astrophysics offer their views of the experience. Nearly 2,000 people worldwide complete the scientific rite of passage each year. Yet for many people, the process remains mysterious.
The more than 300 responses to Symmetry’s survey described a challenging, multifaceted experience that goes far beyond job training, and even beyond the scientific goal of studying the fundamental nature of the universe.

A new observation by the LHCb experiment finds that charm quarks behave differently than their antiparticle counterparts.

A Swedish university tapped the founding director of CERN’s artist-in-residence program to curate a new art exhibit inspired by physics. The pieces are not literal translations of physics concepts to other media or illustrations of physics principles or phenomena. Physics was a spark for the artists, sometimes very clearly and sometimes more tangentially.

What if you could accelerate particles to higher energies in only a few meters? This is the alluring potential of an up-and-coming technology called plasma wakefield acceleration. Scientists around the world are testing ways to further boost the power of particle accelerators while drastically shrinking their size.