Researchers develop a five-minute quality test for sustainable cement industry materials
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Updates every hour. Last Updated: 10-Jul-2025 17:11 ET (10-Jul-2025 21:11 GMT/UTC)
Researchers have been working for decades to understand the details of where the proton gets its intrinsic angular momentum, otherwise referred to as its spin. Recently, there have been indications that the spin contribution of the gluons could either be positive or negative. Now, a new approach that avoids assumptions and re-analyzes observational data with lattice quantum chromodynamics points strongly toward a positive gluon spin contribution, ∆g, to the proton spin.
SLAC researchers studying laser-driven proton acceleration introduced a self-replenishing water sheet target to address the inefficiency of replacing targets after each laser pulse. The new target had an unanticipated side effect, resulting in a naturally focused, more tightly aligned proton beam.