Antihydrogen neutral as charged, Marquette researcher finds
Research conducted at CERN laboratory near Geneva, Switzerland
MILWAUKEE — The charge of antihydrogen – the antimatter counterpart of hydrogen – is neutral, according to a paper published this week by a team of scientists that includes a research assistant professor of physics at Marquette University.
Dr. Timothy Tharp and 38 other colleagues conducted research as part of the ALPHA Collaboration at the CERN laboratory near Geneva, Switzerland, to reach the findings published this week in the scientific journal Nature.
The ongoing research at CERN may help the scientists resolve the long-standing question of why there appears to be so much more matter than antimatter in the observable universe.
According to the Standard Model of particle physics, the charge of antihydrogen should be neutral. However, it was difficult to test because producing antimatter and measuring its properties is experimentally challenging.
“We expected antihydrogen to be electrically neutral – the same as hydrogen – but this hadn’t been tested previously,” said Tharp, who joined Marquette for the spring 2016 semester and was with Aarhus University when conducting the research at CERN.
Tharp and his colleagues studied trapped atoms of antihydrogen and provided new evidence for their charge neutrality, improving measurement precision by a factor of 20 compared to previous measurements.
Since the charge of the antiproton – the antimatter counterpart of the proton – is known to relatively high precision, the result helps to refine the bound on the charge of the positron – the antimatter counterpart of the electron.
Press Releases by Marquette University
SunPower CEO to discuss changes in the solar industry at Marquette University’s Opus College of EngineeringDec 6th, 2016 by Marquette University
Werner will talk about the evolution of the solar industry.
Grants will fund two projects and start a robotics program within local high schools
Marquette researcher finds major Middle East dust storm caused by extreme drought, not regional conflictNov 17th, 2016 by Marquette University
In addition, Parolari and his team found that vegetation coverage was high in 2015 compared to previous years.
Two Marquette University researchers found.
The Law School established the Restorative Justice Initiative in 2004 to help support victims and communities in the process of healing from the effects of crime.
New Marquette Law School Poll finds Clinton leading Trump by 6 percentage points in Wisconsin; Senate race is virtually tiedNov 2nd, 2016 by Marquette University
Among Wisconsin likely voters, 46 percent support Hillary Clinton and 40 percent support Donald Trump.