Articles tagged with Quarks
The DZero collaboration has achieved the world's most precise measurement of the W boson mass, reducing its uncertainty by a factor of ten. This precision measurement will lead to stricter bounds on the mass of the elusive Higgs boson and provide insights into other not-yet-observed particles.
Researchers at Brown University have contributed to the observation of single top quarks, one of the building blocks of matter. This rare event allows scientists to understand top quark properties better.
Scientists confirm single top quark discovery, validating total number of quarks. The rare single top production has significance for the ongoing Higgs search at Fermilab's Tevatron.
A team of 28 scientists, led by Ann Heinson, has made the first observation of single-top-quark production in proton-antiproton collisions. This achievement provides crucial clues to solving long-standing mysteries about the universe, particularly in relation to the Higgs boson.
The U.S. Department of Energy's Thomas Jefferson National Accelerator Facility has received approval for a $310 million project that will double the energy of its accelerated electron beam from 6 GeV to 12 GeV, enabling scientists to study quarks and gluons in unprecedented detail.
Researchers have found that more than half of a proton's spin comes from the orbital motion of its quarks, rather than their spinning. This new theory resolves a long-standing puzzle in physics and agrees with recent experiments and supercomputer calculations.
University of Michigan physicists played a key role in detecting the Omega b baryon, an exotic relative of the proton. This discovery provides insight into the strong force and matter's formation in the universe.
Iowa State University physicists are part of the research team taking notes as the first beam of protons begins racing around the world's largest particle accelerator. The collider aims to answer basic questions about how the universe works, including how particles acquire mass and what is dark matter.
Physicists at Fermilab have discovered a new particle called the Omega-sub-b baryon, composed of two strange quarks and a bottom quark, with a mass of 6.165 GeV/c2. The discovery brings scientists closer to understanding quark formation and completing the periodic table of baryons.
Physicist John Negele will discuss how quarks and gluons interact using lattice field theory on supercomputers. The tiny particles behave differently than larger particles, requiring a unique approach to study them.
Physicists investigate the spin of protons using a novel method that separates quark and gluon contributions to the total spin. This discovery has implications for understanding spin's role in various applications, including medical imaging.
Researchers found new mathematical evidence that string theory's predictions mesh closely with gauge theory, which underlies the interactions among quarks and gluons. This breakthrough could open up uses for string theory in describing atomic nuclei and everyday matter.
The DZero experiment has observed the production of single top quarks in a rare process involving the weak nuclear force, marking an important test of particle theory. The results suggest that the magnitude of Vtb lies within the predicted range, consistent with the Standard Model, but further analysis is needed to confirm this finding.
Physicists at UCR have detected the top quark, the heaviest known elementary particle, for the first time without its antimatter partner, allowing them to study its properties and production process. The discovery has significant implications for understanding the fundamental nature of the universe and how objects acquire mass.
A Johns Hopkins University-led team has discovered two new subatomic particles, called Sigma-sub-b particles, which are members of the 'baryonic' family. The particles contain the second-heaviest quark and are unstable, decaying within a tiny fraction of a second.
The CDF collaboration at Fermilab has discovered two rare types of particles, Sigma-sub-b [Ó <sub> b </sub> ], which are exotic relatives of protons and neutrons. These particles are made of two up quarks and one bottom quark or two down quarks and a bottom quark, and are extremely short-lived, decaying within a tiny fraction of a second.
The CDF collaboration at Fermilab has discovered the rapid transitions between matter and antimatter in the B-sub-s meson, confirming predictions by the Standard Model. The oscillation rate of 3 trillion per second sheds light on the universe's fundamental nature, challenging existing models of supersymmetry.
Researchers used a supercomputer to calculate interactions among neutrons and protons from quark and gluon properties, providing insight into how nuclear forces emerge. This breakthrough paves the way for understanding how finely tuned the universe is and could reveal essential information about carbon-based life.
The eRHIC facility will enable physicists to probe the matter contained within ions with high precision. Analyzing collisions between RHIC ions and eRHIC electrons can help answer fundamental questions in physics about quark-gluon interactions and nuclear spin.
The DZero result suggests a preferred oscillation frequency between 17 and 21 times per picosecond, with a 90% confidence level. This milestone capitalizes on significant luminosity improvements in the Tevatron particle accelerator.
Researchers investigated bottom quark creation in high-energy collisions using D zero experiment data. Wijngaarden's measurements showed the angle between two bottom quarks can be smaller than predicted, indicating a more complex description of the strong nuclear force is needed.
A high-energy photon beam search at Jefferson Lab's CLAS collaboration found no evidence of a pentaquark, contradicting earlier reports. The new analysis, which boasted improved statistics and background understanding, revealed a much weaker signal than initial results, leading researchers to re-evaluate their findings.
Researchers at KEK Laboratory in Japan have observed a new type of interaction among quarks, producing evidence of a beauty quark converting to the lightest down quark. This observation allows for study of fundamental laws of the universe and potential validation or discovery of new physics models.
Researchers use intense beam of polarized electrons to study proton structure, discovering strange quarks that pop in and out of existence. The results provide a clearer picture of how protons are held together, shedding light on the strong nuclear interaction.
The RIKEN-BNL QCDOC supercomputer will primarily be used for physics research, focusing on the properties of quark-gluon plasma and quantum chromodynamics. It will also be available for scientific projects in biology and materials science during 10% of its operating time.
Recent experiments suggest that strange quarks may have zero contribution to the nucleon's charge and current distribution, but a positive trend is observed for the proton's magnetic moment. Further precise measurements are needed to confirm these findings.
Researchers in the Jefferson Lab CLAS collaboration found no evidence of a pentaquark, contradicting earlier signals. The team will take more data in 2006 to search for the particle in a different channel and at higher energies.
Duke physicists Berndt Mueller and Steffen A. Bass contribute to the search for a superhot quark-gluon plasma by analyzing experimental data from RHIC collisions. Their work provides evidence that the matter created in these collisions exhibits unique properties, challenging current physical theory.
Physicists' theories on the top quark and weak nuclear force are challenged by a new measurement. The study suggests that the top quark is left-handed, contradicting previous theories linking it to the weak force.
RHIC scientists observe intriguing data in gold-gold collisions, indicating the presence of a new form of matter. The copper experiments will provide control data to help understand how this phenomenon is produced and controlled.
Physicists have demonstrated that their theories are correct in explaining how quarks interact in the beta decay of particles. The team's work marked the first time all relevant measurements were made together in one modern, statistically rigorous experiment.
Physicists have developed a new method to calculate top quark mass with improved precision, allowing researchers to explore the previously inaccessible energy range of the Higgs boson. This breakthrough could lead to a better understanding of how particles acquire mass and solve one of science's great conundrums.
Researchers at Berkeley Lab have developed a way to image and digitally restore mechanical audio recordings, such as shellac phonograph discs. This technology enables the mass digitization of thousands of blues, classical, jazz, and spoken word recordings in the Library of Congress's archives.
Researchers at the University of Melbourne have discovered a sub-atomic particle called X(3872) that defies explanation using current theories. This 'mystery meson' has unique mass and decay properties that challenge our understanding of quarks and the color force.
Researchers will showcase latest experiments searching for signatures of quark-gluon plasma, a state of matter thought to have existed at the universe's dawn. Controversial observations hint at the possibility of detecting color glass condensate, a previously theorized state within gold ions.
A cholesterol-free mouse model was generated, supporting the 'sterol synergism' theory and highlighting the importance of cholesterol in developmental stages. The knock-out pups showed poorer growth characteristics than normal animals.
Researchers observe differences in jet production and particle energy between Deuteron-Gold and Gold-Gold collisions, hinting at the existence of quark-gluon plasma. These findings open up new avenues for studying the strong nuclear force.
Charles Petit won the David Perlman Award for his article on freshening in the North Atlantic, while Patric Senson and Jim Handman received the Walter Sullivan Award for their program on climate change. The awards recognize excellent science journalism covering critical topics.
The SLAC experiment has discovered a new subatomic particle called the Ds (2317), which combines a charm quark with an anti-strange quark. This unusual configuration has unexpected properties that will provide insight into the force binding quarks together, challenging current understanding of quark forces.
Scientists have detected a rare nuclear fusion process that violates charge symmetry, allowing hydrogen to exist. The rate of this process is expected to provide clues about the cause of the violation, which may be linked to quarks.
Researchers discovered that protons at rest can take on various shapes depending on the speed and spin of quarks inside. The findings challenge traditional physics textbook descriptions and offer clues for unifying the four forces of nature into a theory of everything.
The National Science Foundation approves a major change in LEPP's investigation into elementary particles, shifting focus to charm quark physics. Physicists will make precision measurements of the strong force using CESR and CLEO facilities.
Researchers at Duke University have created a strongly interacting fermi gas by cooling lithium-6 atoms to near absolute zero. The resulting gas displays unusual behavior, including rapid expansion in one direction and no movement in another, challenging existing theories of superfluidity.
Physicists at Kansas State University are studying the top quark, the heaviest quark known, which is 40 times heavier than any other quark. They aim to understand its properties and relationship with other quarks to uncover why it doesn't exist naturally.
Physicist Maria Spiropulu proposes a new reality theory that unifies gravity and electromagnetism. Researchers are using high-energy particle collisions to detect the signature of extra dimensions, which may reveal a mysterious sister world with compacted or finite dimensions.
Researchers confirm rare kaon decay through 6 trillion decays, shedding light on fundamental forces and building blocks of the universe. The discovery is a significant confirmation of earlier findings and paves the way for further study of exotic aspects of the Standard Model.
Physicists at RHIC are investigating how gluons contribute to proton spin by colliding polarized protons. The experiment aims to tease apart the individual contributions of quarks and gluons to the proton's spin.
Physicists at Brookhaven National Laboratory have produced a significant number of 'doubly strange nuclei', containing two strange quarks, to study nuclear forces and neutron stars. The discovery uses statistical techniques to infer the presence of these nuclei, which may provide insight into the properties of neutron stars.
Scientists aim to recreate the hot, dense conditions of the universe's earliest form by smashing gold ions together at nearly the speed of light. The new run is expected to produce 100 times more data and provide a clearer picture of quark-gluon plasma
Scientists have calculated a lower strange quark contribution and discovered evidence for the proton's anapole moment, a parity-violating electromagnetic effect. The findings suggest less than 6% of the proton's magnetic moment arises from the strange quark.
Physicists at the University of Illinois have made new measurements that provide information about how different flavors of quarks in a proton generate its magnetic moment. The results suggest that the contribution from the strange quark is significantly positive, contrary to most theoretical models.
Researchers at Purdue University are developing a silicon detector, Si3, to analyze subatomic particles and test the widely accepted standard model of physics. The detector will help investigate why the universe is predominantly made of matter rather than antimatter.
Researchers at the University of Illinois are developing a new trigger that can distinguish between interesting and non-interesting collisions in particle accelerators. The device will help identify collisions that create bottom quarks, providing essential information about fundamental rules for assembling matter.
Researchers at Ohio State University have developed a new model of atomic forces that may solve a long-standing problem in particle physics. The work aims to reconcile physicist Richard Feynman’s 1970s model of the proton with modern views of quark structure, simplifying equations and potentially aiding experimental calculations.
Researchers at the University of Notre Dame have discovered a new subnuclear particle, an exotic meson, which is composed of quarks and antiquarks rather than just one type. The discovery was made possible by a high-energy particle experiment conducted at Brookhaven National Laboratory.