Adding to the challenge, for every predicted Higgs boson decay to muons at the LHC, there are about 1,000 muon pairs that mimic every single Higgs boson.The Iowa group working at CMS and part of the research leading to the discovery includes Jane Nachtman and Yasar Onel, professors in the Department of Physics and Astronomy; and physics graduate students Mohammad Alhusseini, Viktor Khristenko, and Ohannes Koseyan.Alhusseini, Nachtman, and Onel are listed as co-authors on a paper with the new results.
The content is provided for information purposes only. The Higgs boson, as proposed within the Standard Model, is the simplest manifestation of the Brout-Englert-Higgs mechanism. The data analysed allowed CMS to rule out that more than approximately 1.9% of Higgs bosons could transform into Zρ and more than 0.6% could transform into Zφ. An international group of scientists including particle physicists at the University of Iowa has announced the first evidence of rare interactions between the Higgs boson and a fundamental particle called a muon.The discovery, announced this week at the 40th International Conference on High Energy Physics by the Compact Muon Solenoid (CMS) collaboration working at the Large Hadron Collider (LHC), the world’s largest and highest-energy collider located near Geneva, Switzerland, adds to understanding about how basic constituents of the universe interact, and how these interactions may fit a theoretical framework called the Standard Model. The particle, which is named after British physicist Peter Higgs… The Higgs boson is believed to give all other particles their mass, and was famously discovered by the ATLAS and CMS collaborations at the LHC in 2012. Medical Xpress covers all medical research advances and health news Tech Xplore covers the latest engineering, electronics and technology advances Science X Network offers the most comprehensive sci-tech news coverage on the web Measurement of Higgs boson decay to a pair of muons in proton-proton collisions at s√=13TeV. The Higgs boson is believed to give all other particles their mass, and was famously discovered by the ATLAS and CMS collaborations at the LHC in 2012. A New View of the Higgs Boson. These include searches for rare transformations of the Higgs boson into a Z boson—which is a carrier of one of the fundamental forces of nature—and a second particle. Other types of Higgs bosons are predicted by other theories that go beyond the Standard Model. The CMS searches were for a much rarer process, predicted by the Standard Model to occur only once in every million Higgs transformations, and the collaboration was able to set upper limits of about 1000 times the Standard Model expectations for the H→Zρ and H→Zφ processes.
ATLAS search for "invisible" transformations of the Higgs boson: CMS search for Higgs transformations involving a dark photon: Your feedback will go directly to Science X editors.Thank you for taking your time to send in your valued opinion to Science X editors. The facility requires a crew of highly-trained and dedicated individuals, as the complex, one-of-a-kind detectors are operated remotely in the LHC tunnel and must function at a high level for months without intervention. A Higgs boson decaying to two muons (which weigh in at 0.17 GeV apiece) is relatively rare—it happens only once in 5,000 times. The Higgs boson was discovered in 2012 by physicists working on the CMS and ATLAS experiments at the LHC, supported by CERN member states and other contributing countries including the United States, via the US Department of Energy’s Office of Science and the National Science Foundation.
When data volumes are not high enough to claim a definite observation of a particular process, physicists can predict the limits that they expect to place on the process. These so-called "decay channels" have relatively clean signatures making them more easily detectable, and they have been observed at the LHC. You can unsubscribe at any time and we'll never share your details to third parties. June 4, 2020 In the case of Higgs transformations, these limits are based on the product of two terms: the rate at which a Higgs boson is produced in proton–proton collisions (production cross-section) and the rate at which it will undergo a particular transformation to lighter particles (branching fraction).ATLAS expected to place an upper limit of 1.7 times the Standard Model expectation for the process involving Higgs transformations to a Z boson and a photon (H→Zγ) if such a transformation were not present; the collaboration was able to place an upper limit of 3.6 times this value, approaching the sensitivity to the Standard Model's predictions. AP Photo/Denis Balibouse, Pool. "These transformations are extremely rare," says Roberto Carlin, spokesperson of the CMS collaboration, "and are not expected to be observed at the LHC unless physics from beyond the Standard Model is involved."
You can be assured our editors closely monitor every feedback sent and will take appropriate actions. At LHCP, ATLAS presented their latest upper limit—of 13% – on the probability that a Higgs boson could transform into invisible particles known as weakly interacting massive particles, or WIMPs, while CMS presented results from a new search into Higgs transformations to four leptons via at least one intermediate "dark photon", also presenting limits on the probability of such a transformation occurring at the LHC.The Higgs boson continues to prove invaluable in helping scientists test the Standard Model of particle physics and seek physics that may lie beyond.
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