From Scientific American, March 16, 2023: Big news about a smaller size: MINERvA researchers used a new and entirely independent method to measure a proton’s radius. The team’s measurement of the proton’s radius was 0.73 femtometer, even smaller than the 0.84-femtometer electric charge radius. In either case, it is almost 10,000 times smaller than a hydrogen atom.
MINERvA
From Physics World, March 6, 2023: The MINERvA experiment at Fermilab has been used to study the structure of the proton using neutrinos. Teijin Cai and colleagues working on Fermilab’s MINERvA experiment have showed how information about the proton can be extracted from neutrinos that have been scattered by the detector’s plastic target.
From Science Daily, Feb. 1, 2023: Yesterday, Nature posted new research which used a beam of neutrinos for the first time to investigate the structure of protons. With Fermilab’s MINERvA detector, scientists were able to precisely measure the proton’s size and structure using neutrinos with data gathered from thousands of neutrino-hydrogen scattering events.
For the first time, particle physicists have been able to precisely measure the proton’s size and structure using neutrinos with data gathered from thousands of neutrino-hydrogen scattering events collected by MINERvA, a particle physics experiment at the U.S. Department of Energy’s Fermi National Accelerator Laboratory.
Laza Rakotondravohitra was the first Malagasy grad student to conduct research in neutrino physics. He and others are working to ensure he will be far from the last.
Hard to believe you can play pool with neutrinos, but certain neutrino events are closer to the game than you think. These special interactions involve a neutrino — famously elusive — striking a particle inside a nucleus like a billiard ball. MINERvA scientists study the dynamics of this subatomic ricochet to learn about the neutrino that triggered the collision. Now they have measured the probability of these quasielastic interactions using Fermilab’s medium-energy neutrino beam. Such measurements are important for current and future neutrino experiments.
A collaboration with fewer than 100 members has played an important role in Fermilab’s ongoing partnership with Latin American scientists and institutions.
Scientists working on the MINERvA experiment at Fermilab have examined a few ways neutrons can affect the measurements of antineutrino interactions.
The Universities Research Association recognizes Fermilab scientist Laura Fields for her contributions to the field of accelerator-based neutrino physics. She co-leads the MINERvA experiment, which is making measurements necessary for tuning models of neutrino interactions used in ongoing and future neutrino experiments, and helped design a new focusing system for Fermilab’s LBNF neutrino beam.
On Feb. 26, a team on Fermilab’s MINERvA neutrino experiment gathered around a computer screen to officially conclude its data acquisition. Even with the data collection over, the work marches on. MINERvA now turns its attention to analyzing the data it has collected over the past nine years of its run.