Searching for the spin of the proton

Article Abstract:

Research at the new Hermes particle detector in Germany will be focused on determining the source of the proton's spin. Quantum theorists once believed that quarks were responsible for 100% of a proton's spin, but observational data have shown that quarks account for less than a third of the spin.

Protons

---

Physicists polish one model while looking to the next

Article Abstract:

Indirect measurements of the mass of the top quark agree with Fermilab's breakthrough direct observation and measurement, thus plugging a hole in particle physicists' Standard Model. New measurement techniques for future particle accelerators and the unsolved neutrino anomaly are also discussed.

Planning, Particle accelerators

---

Quark studies put theorists in a spin

Article Abstract:

Physicists had reported that the valence quarks contribute a small portion of a nucleon's spin, instead of all of it as predicted, but they could not agree on a value. Now three major labs have agreed that the contribution is about 25%. The source of the rest of the spin remains a mystery.

Similar abstracts:

• Abstracts: Mechanics and Physics of brittle to ductile transitions in fracture. The modeling of unusual rate sensitivities inside and outside the dynamic stain aging regime
• Abstracts: Interaction of phase transformation and diffusion in steels. Measurement of thickness-average residual stress near the edge of a thin laser peened strip
• Abstracts: A brain drain out of the US turns into a gusher for California. Generous staffing and permissive laws aid Asia's largest stem cell effort
• Abstracts: The California gambit. Positive public attitudes lift British scientists above destructive fray
• Abstracts: Murdercide. The mind of the market. Eat, drink and be merry

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.