The Interactions Collaboration seeks to support the international science of particle physics and to set visible footprints for peaceful collaboration across all borders.

The Interactions.org website is designed to serve as central resource for information about particle physics, including press releases, articles, news, event listings and images. (It seems fitting that the World Wide Web, which came from particle physics, should have a role in supporting the science that created it.)

The LHCb (Large Hadron Collider beauty) experiment at CERN, located at Point 8 of the LHC near Geneva, focuses on studying b-quarks to understand the differences between matter and antimatter. It started operating in 2010 and investigates CP violation and rare particle decays, providing insights into why the universe is dominated by matter. LHCb has made significant discoveries, including exotic particles like tetraquarks and pentaquarks, and has observed CP violation in baryons. Its findings test the Standard Model and explore potential new physics.

HAWC is located on the flanks of the Sierra Negra volcano near Puebla, Mexico at an altitude of 4100 meters (13,500 feet). The observatory is made up of 300 tanks filled with ultra-purified water that, through the cherenkov effect, can detect the arrival of charged particles. It has an instantaneous field of view covering 15% of the sky, and during each 24 hour period HAWC observes two-thirds of the sky.

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While in graduate school, Ken Cecire found that his greatest satisfaction was a teaching assistant in undergraduate introductory courses. Upon receiving an MA in Physics at City College, New York in 1981, Ken became a high school physics teacher. After several years of summer research at Jefferson Lab, Ken left the classroom in 1999 and moved to Hampton University to join the staff of the newly formed QuarkNet, a U.S. program to bring particle physics research to high school teachers and students. Ken was introduced to International Masterclasses during a visit to CERN in 2006.

The CMS (Compact Muon Solenoid) experiment is one of the two large, general-purpose particle physics detectors at CERN's Large Hadron Collider (LHC) . It's a major international scientific collaboration, involving over 6000 particle physicists, engineers, and technicians from across the globe .

CERN, the European Organization for Nuclear Research, is one of the world's leading laboratories for particle physics. The Organization is located on the French-Swiss border, with its headquarters in Geneva. At CERN, physicists and engineers probe the fundamental structure of the universe, by providing a unique range of particle accelerator facilities that enable research at the forefront of human knowledge.

The Belle II experiment is a particle physics experiment designed to study the properties of B mesons (heavy particles containing a beauty quark) and other particles. The Belle II spectrometer, located on the interaction point of the SuperKEKB electron-positron collider, Tsukuba, Japan, started data taking in early 2018. The Belle II collaboration consists of over 984 physicists and engineers from 115 institutions in 26 countries.