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Physicists offer theories to explain mysterious collision at Large Hadron Collider

Date:
January 8, 2016
Source:
University of Notre Dame
Summary:
An unexpected bump in data from CERN's Large Hadron Collider is causing physicists to theorize about what caused it -- with potentially exciting results. Physicists are offering theories about what it could mean.
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Physicists around the world were puzzled recently when an unusual bump appeared in the signal of the Large Hadron Collider, the world's largest and most powerful particle accelerator, causing them to wonder if it was a new particle previously unknown, or perhaps even two new particles. The collision cannot be explained by the Standard Model, the theoretical foundation of particle physics.

Adam Martin, assistant professor of physics at the University of Notre Dame, said he and other theoretical physicists had heard about the results before they were released on Dec. 15, and groups began brainstorming, via Skype and other ways, about what the bump could mean if confirmed -- a long shot, but an intriguing one. He and some collaborators from Cincinnati and New York submitted a pre-peer-review paper that appeared on arXiv.org on Dec. 23.

"It was so weird that people were forced to chuck their favorite theories and start from scratch," Martin says. "That's a fun area of particle physics. We're looking into the unknown. Is it one new particle? Is it two new particles?"

The paper considers four possible explanations for the data, including the possibility that it could indicate a heavier version of the Higgs boson, also commonly known as "the God particle." Further research could yield mundane explanations, Martin says, and the excitement could fade as it has many times in his career. Or it could open up new insights and call for new models.

"People are still cautiously optimistic," he says. "Everybody knows that with more data, it could just go away. If it stays, it's potentially really, really, really exciting."

Authors of paper, "On the 750 GeV di-photon excess," are Martin, Wolfgang Altmannshofer, Jamison Galloway, Stefania Gori, Alexander L. Kagan and Jure Zupan.


Story Source:

The above post is reprinted from materials provided by University of Notre Dame. Note: Content may be edited for style and length.


Journal Reference:

  1. Wolfgang Altmannshofer, Jamison Galloway, Stefania Gori, Alexander L. Kagan, Adam Martin, Jure Zupan. On the 750 GeV di-photon excess. arXiv.org, 2015; [link]

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University of Notre Dame. "Physicists offer theories to explain mysterious collision at Large Hadron Collider." ScienceDaily. ScienceDaily, 8 January 2016. <www.sciencedaily.com/releases/2016/01/160108210123.htm>.
University of Notre Dame. (2016, January 8). Physicists offer theories to explain mysterious collision at Large Hadron Collider. ScienceDaily. Retrieved August 24, 2016 from www.sciencedaily.com/releases/2016/01/160108210123.htm
University of Notre Dame. "Physicists offer theories to explain mysterious collision at Large Hadron Collider." ScienceDaily. www.sciencedaily.com/releases/2016/01/160108210123.htm (accessed August 24, 2016).