Measurement of interaction between antiprotons

Journal: Nature

Published: 2015-11-04

DOI: 10.1038/nature15724

Affiliations: 52

Authors: 334

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Research Highlight

Antiprotons don’t break laws of attraction

© Ramberg/E+/Getty

© Ramberg/E+/Getty

Researchers and armchair philosophers have long wondered why matter dominates the Universe instead of antimatter. Scientists had theorized that matter prevailed due to antiparticles interacting differently to their matter analogues.

But now the STAR experiment — an international team of more than 500 scientists, including some from the Moscow Engineering Physics Institute — has published a study in Nature that measured antiproton interactions, and found them to be similar to run-of-the-mill protons, confounding hopes that antiproton interactions may be involved in the matter-antimatter question.

Using the Relativistic Heavy Ion Collider (RHIC) at Brookhaven University, the team smashed gold nuclei together at almost the speed of light, producing a plethora of subatomic particles including antiprotons. They found that, when close enough, antiprotons overcame their inherent repulsion and bound to each other via the nuclear strong force, just as protons do.

“It may not give us a solution to the bigger problem, but we most definitely removed one option," says Frank Geurts from Rice University, one of the study authors.

Supported content

  1. Nature 527, 345-349 (2016). doi: 10.1038/nature15724
Institutions FC
Brookhaven National Laboratory (BNL), United States of America (USA) 0.13
Lawrence Berkeley National Laboratory (LBNL), United States of America (USA) 0.07
Joint Institute for Nuclear Research (JINR), Russia 0.05
Central China Normal University (CCNU), China 0.04
University of Science and Technology of China (USTC), China 0.04
Shanghai Institute of Applied Physics (SINAP), CAS, China 0.04
University of California Los Angeles (UCLA), United States of America (USA) 0.03
Kent State University (KSU), United States of America (USA) 0.03
Purdue University, United States of America (USA) 0.03
Texas A&M University (TAMU), United States of America (USA) 0.02
Tsinghua University, China 0.02
Yale University, United States of America (USA) 0.02
Institute of Modern Physics (IMP), CAS, China 0.02
Nuclear Physics Institute (UJF), ASCR, Czech Republic 0.02
Rice University, United States of America (USA) 0.02
Warsaw University of Technology (WUT), Poland 0.02
Temple University, United States of America (USA) 0.02
Variable Energy Cyclotron Centre (VECC), India 0.02
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Russia 0.02
Institute for High Energy Physics (IHEP), NRCKI, Russia 0.02
University of California Davis (UC Davis), United States of America (USA) 0.02
University of Illinois at Chicago (UIC), United States of America (USA) 0.02
The Ohio State University (OSU), United States of America (USA) 0.01
The University of Texas at Austin (UT Austin), United States of America (USA) 0.01
Valparaiso University, United States of America (USA) 0.01
Frankfurt Institute for Advanced Studies (FIAS), Germany 0.01
Indiana University Bloomington (IUB), United States of America (USA) 0.01
University of California Berkeley (UC Berkeley), United States of America (USA) 0.01
Wayne State University (WSU), United States of America (USA) 0.01
Faculty of Nuclear Sciences and Physical Engineering (FNSPE), CTU, Czech Republic 0.01
University of Jammu, India 0.01
University of Houston (UH), United States of America (USA) 0.01
National Institute of Science Education and Research (NISER), India 0.01
A.I. Alikhanov Institute of Theoretical and Experimental Physics (ITEP), NRCKI, Russia 0.01
Panjab University (PU), India 0.01
Argonne National Laboratory (ANL), United States of America (USA) 0.01
Indian Institute of Technology Bombay (IIT Bombay), India 0.01
Michigan State University (MSU), United States of America (USA) 0.01
AGH University of Science and Technology (AGH UST), Poland 0.01
Institute of Physics, Bhubaneswar, India 0.01
The Pennsylvania State University (Penn State), United States of America (USA) 0.01
Shandong University (SDU), China 0.01
University of Kentucky (UK), United States of America (USA) 0.01
Creighton University, United States of America (USA) 0.01
Korea Advanced Institute of Science and Technology (KAIST), South Korea 0.01
The Henryk Niewodniczanski Institute of Nuclear Physics (IFJ PAN), PAS, Poland 0.01
World Laboratory for Cosmology And Particle Physics (WLCAPP), Egypt 0.01
Pusan National University (PNU), South Korea 0.01
University of Zagreb, Croatia 0.01
University of Rajasthan, India 0.01
Max Planck Institute for Physics (MPP), Germany 0.01
USN U.S. Naval Academy (USNA), United States of America (USA) 0

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