More information: Measurement of the Z-boson mass, arXiv (2025). DOI: 10.48550/arxiv.2505.15582 Journal information: Physical Review Letters , arXiv ...

Fewer than half of Mass. residents approve of Gov. Maura Healey, new poll shows The poll showed that 49 percent of residents approve of Healey’s performance, while 45 percent don’t.

The White House had sought an emergency stay of an injunction issued by U.S. Judge Susan Illston of San Francisco in a lawsuit brought by labor unions and cities, including San Francisco and Chicago.

After a winter of surging energy costs, the Massachusetts State Auditor told WCVB's "On The Record" that her office is looking into the biggest program fueling the rise in utility bills: Mass Save.

Bishop Martin in his statement said the measure was meant to bring the Charlotte diocese in line with Pope Francis' 2021 motu proprio Traditionis Custodes, which greatly restricted the Latin Mass ...

OTTAWA - Prime Minister Mark Carney is flying to Italy, where he is set to attend Pope Leo XIV’s inaugural mass on Sunday. The inaugural mass, which serves as a swearing-in of sorts for a new ...

On Sunday morning, May 18, a Mass for the beginning of the pontificate of Pope Leo XIV will take place in St. Peter's Square at the Vatican. Although the Mass is no longer described as an ...

The KATRIN experiment began operations in 2019. It seeks to constrain the neutrino’s mass by looking at the energy spectrum of electrons and electron antineutrinos emitted by decaying tritium, a ...

With the current data from the KATRIN experiment, an upper limit of 0.45 electron volt/c 2 (corresponding to 8 x 10 -37 kilograms) could be derived for the neutrino mass.

For context, that’s less than one-millionth the mass of an electron, which clocks in at a comparatively gargantuan 511,000 eV. So, yeah—neutrinos are ridiculously lightweight.

The KATRIN experiment in Germany nearly halved the maximum possible mass for neutrinos, setting it at 0.45 electron volts.