Current Quarks News and Events

Current Quarks News and Events, Quarks News Articles.
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Theory describes quantum phenomenon in nanomaterials
Theoretical physicists Yoshimichi Teratani and Akira Oguri of Osaka City University, and Rui Sakano of the University of Tokyo have developed mathematical formulas that describe a physical phenomenon happening within quantum dots and other nanosized materials. The formulas, published in the journal Physical Review Letters, could be applied to further theoretical research about the physics of quantum dots, ultra-cold atomic gasses, and quarks. (2020-12-23)

Breakthrough in nuclear physics
The positively charged protons in atomic nuclei should actually repel each other, and yet even heavy nuclei with many protons and neutrons stick together. The so-called strong interaction is responsible for this. Prof. Laura Fabbietti and her research group at the Technical University of Munich (TUM) have now developed a method to precisely measure the strong interaction utilizing particle collisions in the ALICE experiment at CERN in Geneva. (2020-12-09)

Observation of four-charm-quark structure
Hadrons are composed of quarks, a type of fundamental particle, bound by the strong interaction. Recently, the LHCb collaboration discovered a new state X(6900) , which matches the properties of an exotic four-charm-quark hadron. This unusual structure, which is observed for the first time, makes it a unique system to study the quantum chromodynamics, the theory of the strong interaction. (2020-11-11)

Has the hidden matter of the universe been discovered?
Astrophysicists consider that around 40% of the ordinary matter that makes up stars, planets and galaxies remains undetected, concealed in the form of a hot gas in the complexe cosmic web. Today, scientists at the Institut d'Astrophysique Spatiale (CNRS/Université Paris-Saclay) may have detected, for the first time, this hidden matter through an innovative statistical analysis of 20-year-old data. Their findings are published on November 6, 2020 in Astronomy & Astrophysics. (2020-11-06)

New research deepens mystery of particle generation in proton collisions
Researchers have shown that in polarized proton-proton collisions, the neutral pions in the very forward area of collisions -- where direct interactions involving quarks and gluons are not applicable -- still have a large degree of left-right asymmetry. This finding suggests that the previous consensus regarding the generation of particle in such collisions need to be reevaluated. (2020-06-23)

Strongest evidence yet that neutrinos explain how the universe exists
New data throws more support behind the theory that neutrinos are the reason the universe is dominated by matter. (2020-04-15)

APS tip sheet: First results from the Belle II experiment
The Belle II experiment reports its first measurements. (2020-04-06)

'Strange' glimpse into neutron stars and symmetry violation
New results from precision particle detectors at the Relativistic Heavy Ion Collider (RHIC) offer a fresh glimpse of the particle interactions that take place in the cores of neutron stars and give nuclear physicists a new way to search for violations of fundamental symmetries in the universe. (2020-03-09)

Scientists shed light on mystery of dark matter
Nuclear physicists at the University of York are putting forward a new candidate for dark matter -- a particle they recently discovered called the d-star hexaquark. (2020-03-03)

How big is the neutron?
The size of neutrons cannot be measured directly: it can only be determined from experiments involving other particles. While such calculations have so far been made in a very indirect way using old measurements with heavy atoms, a team at the Institute of Theoretical Physics at Ruhr-Universität Bochum (RUB) has taken a different approach. By combining their very accurate calculations with recent measurements on light nuclei, the researchers have arrived at a more direct methodology. (2020-02-26)

The force is strong in neutron stars
Physicists at MIT and elsewhere have for the first time characterized the strong nuclear force, and the interactions between protons and neutrons, at extremely short distances. (2020-02-26)

Pitt study uncovers new electronic state of matter
The discovery shows that when electrons can be made to attract one another, they can form bunches of two, three, four and five electrons that behave like new types of particles. (2020-02-13)

Exploring strangeness and the primordial Universe
Within quark-gluon plasma, strange quarks are readily produced through collisions between gluons. In analysis published in EPJ ST, Dr Johann Rafelski presents how our understanding of this characteristic strangeness production signature has evolved over the span of his long career. (2020-01-31)

Leptons help in tracking new physics
Electrons with 'colleagues' -- other leptons - are one of many products of collisions observed in the LHCb experiment at the Large Hadron Collider. According to theorists, some of these particles may be created in processes that extend beyond standard physics. The latest analysis verifies these predictions. (2019-12-16)

Deuteron-like heavy dibaryons -- a step towards finding exotic nuclei
Using supercomputer, TIFR's physicists have predicted the existence of deuteron-like exotic nuclei for the first time as well as provided their masses precisely. Similar to the role of deuteron in nucleosynthesis - which creates energy in sun and produces other elements-- the predicted nuclei opens up the exciting possibility for creating other exotic nuclei through a new type of fusion process and hence also energy creation some day in the future. (2019-10-22)

FSU physics researchers break new ground, explore unknown energy regions
Florida State University physicists are using photon-proton collisions to capture particles in an unexplored energy region, yielding new insights into the matter that binds parts of the nucleus together. (2019-10-10)

More energy means more effects -- in proton collisions
The higher the collision energy of particles, the more interesting the physics. Scientists from the Institute of Nuclear Physics of the Polish Academy of Sciences in Cracow have found further confirmation of this assumption, this time in the high energy collision of protons with protons or lead nuclei. (2019-10-04)

A novel tool to probe fundamental matter
The origin of matter remains a complex and open question. A novel experimental approach -- described in Nature Physics -- could be exploited to better test the theories of physicists. (2019-09-16)

Near misses at Large Hadron Collider shed light on the onset of gluon-dominated protons
New findings from University of Kansas researchers center on work at the Large Hadron Collider to better understand the behavior of gluons. (2019-09-10)

'Fire streaks' ever more real in the collisions of atomic nuclei and protons
Collisions of lead nuclei take place under extreme physical conditions. Their course can be described using a model which assumes that the transforming, extremely hot matter -- the quark-gluon plasma -- flows in the form of hundreds of streaks. Until now, the 'fire streaks' seemed to be purely theoretical structures. However, the latest analysis of collisions of individual protons reinforces the hypothesis that they represent a real physical phenomenon. (2019-05-09)

CEBAF turns on the charm
The world's most advanced particle accelerator for investigating the quark structure of the atom's nucleus has just charmed physicists with a new capability. The production of charm quarks in J/ψ (J/psi) particles by CEBAF at the Department of Energy's Thomas Jefferson National Accelerator Facility confirms that the facility has expanded the realm of precision nuclear physics research with electron beams to higher energies. (2019-04-18)

Researchers discover CP violation in charm meson decays
Researchers from the Higher School of Economics and Yandex, as part of the LHCb collaboration at CERN, have been the first to discover CP violation in charm meson decays. This discovery may become a key to solving the mystery of matter-antimatter asymmetry in the universe. (2019-04-05)

Syracuse University physicist discovers new class of pentaquarks
A professor of physics at Syracuse University's College of Arts and Sciences, has uncovered new information about a class of particles called pentaquarks. His findings could lead to a new understanding of the structure of matter in the universe. (2019-03-26)

Physicists reveal why matter dominates universe
Physicists in the College of Arts and Sciences at Syracuse University have confirmed that matter and antimatter decay differently for elementary particles containing charmed quarks. (2019-03-21)

Sea quark surprise reveals deeper complexity in proton spin puzzle
New data from the STAR experiment at the Relativistic Heavy Ion Collider (RHIC) add detail -- and complexity -- to an intriguing puzzle that scientists have been seeking to solve: how the building blocks that make up a proton contribute to its spin. The results reveal that different 'flavors' of antiquarks contribute differently to the proton's overall spin -- and in a way that's opposite to those flavors' relative abundance. (2019-03-14)

Physicists solve 35-year-old mystery about quarks
Physicists from Tel Aviv University, the Massachusetts Institute of Technology and the Thomas Jefferson National Accelerator Facility now know why quarks, the building blocks of the universe, move more slowly inside atomic nuclei, solving a 35-year-old-mystery. (2019-03-04)

Correlated nucleons may solve 35-year-old mystery
A careful re-analysis of data taken at DOE's Jefferson Lab has revealed a possible link between correlated protons and neutrons in the nucleus and a 35-year-old mystery. The data have led to the extraction of a universal function that describes the EMC Effect, the once-shocking discovery that quarks inside nuclei have lower average momenta than predicted, and supports an explanation for the effect. (2019-02-20)

Study of quark speeds finds a solution for a 35-year physics mystery
MIT physicists now have an answer to a question in nuclear physics that has puzzled scientists for three decades: Why do quarks move more slowly inside larger atoms? (2019-02-20)

Merging neutron stars
The option to measure the gravitational waves of two merging neutron stars has offered the chance to answer some of the fundamental questions about the structure of matter. At the extremely high temperatures and densities in the merger scientists conjecture a phase-transition where neutrons dissolve into their constituents: quarks and gluons. (2019-02-14)

Why are you and I and everything else here?
We're here because there's more matter than antimatter in the universe. An article in Physical Review Letters explores the puzzle of the baryon asymmetry, one of the biggest unsolved problems in physics. (2019-02-01)

Superinsulators to become scientists' quark playgrounds
Scientists widely accept the existence of quarks, the elusive fundamental particles that make up protons and neutrons. But information about their properties is still lacking. (2019-01-30)

Big Bang query: Mapping how a mysterious liquid became all matter
Lehigh University's Rosi Reed presents findings from new Beam Energy Scan at Brookhaven National Lab's Relativistic Heavy Ion Collider that tests the limits of quark-gluon plasma (QGP), the mysterious liquid thought to have existed in the micro-seconds after the Big Bang (2019-01-14)

Precision experiment first to isolate, measure weak force between protons, neutrons
A team of scientists has for the first time measured the elusive weak interaction between protons and neutrons in the nucleus of an atom. They had chosen the simplest nucleus consisting of one neutron and one proton for the study. Through a unique neutron experiment at Oak Ridge National Laboratory, experimental physicists resolved the weak force between the particles at the atom's core, predicted in the Standard Model that describes the elementary particles and their interactions. (2018-12-19)

Compelling evidence for small drops of perfect fluid
Nuclear physicists analyzing data from the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC) have published additional evidence that collisions of miniscule projectiles with gold nuclei create tiny specks of the perfect fluid that filled the early universe. (2018-12-10)

Researchers create tiny droplets of early universe matter
Researchers have created tiny droplets of the ultra-hot matter that once filled the early universe, forming three distinct shapes and sizes: circles, ellipses and triangles. (2018-12-10)

On the trail of the Higgs Boson
In a quest to understand the production mechanisms for the Higgs Boson, Silvia Biondi from the National Institute of Nuclear Physics, Bologna, Italy investigated the traces of a rare process, called ttH, in which the Higgs Boson is produced in association with a pair of elementary particles referred to as top quarks. Her findings can be found in a recent study published in EPJ Plus. (2018-12-05)

Infinite-dimensional symmetry opens up possibility of a new physics -- and new particles
The symmetries that govern the world of elementary particles at the most elementary level could be radically different from what has so far been thought. This surprising conclusion emerges from new work published by theoreticians from Warsaw and Potsdam. The scheme they posit unifies all the forces of nature in a way that is consistent with existing observations and anticipates the existence of new particles with unusual properties, which may even be present in our close environs. (2018-11-15)

World's next supercollider design report released
Scientists working on the Circular Electron Positron Collider (CEPC), a planned next-generation particle collider in China, released its Conceptual Design Report (CDR) on Nov. 14 in Beijing. (2018-11-14)

Spacetime -- a creation of well-known actors?
Most physicists believe that the structure of spacetime is formed in an unknown way in the vicinity of the Planck scale, i.e. at distances close to one trillionth of a trillionth of a metre. However, careful considerations undermine the unambiguity of this prediction. There are quite a few arguments in favour of the fact that the emergence of spacetime may occur as a result of processes taking place much 'closer' to our reality: at the level of quarks and their conglomerates. (2018-11-08)

Scientists refine the search for dark matter
Researchers from Lund University in Sweden, among others, have developed a more effective technique in the search for clues about dark matter in the universe. They can now analyse much larger amounts of the data generated at CERN. (2018-10-29)

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