symmetry magazine

dimensions of particle physics

dimensions of particle physics

A joint Fermilab/SLAC publication

 

logbook

June 2014

  • June 16, 2014
    logbook: The supersymmetric bet
    Particle physicists playfully take sides over whether the Large Hadron Collider is likely to discover evidence of Supersymmetry.

May 2014

  • May 6, 2014
    logbook: NOvA’s first neutrino
    The first picture of a neutrino that traveled from Illinois to Minnesota shows the NOvA experiment’s advantage in studying neutrino properties.

November 2013

  • November 8, 2013
    logbook: Ultra-high-energy neutrinos
    Scientists on the IceCube experiment discovered two extraterrestrial neutrinos with energies higher than any neutrino anyone had detected before.

February 2013

  • February 26, 2013
    logbook: Higgs-like particle
    Early in the summer of 2012, excitement reached a peak as members of the CMS and ATLAS collaborations confirmed among themselves that they would soon announce the discovery of what looked like the Higgs boson.

January 2013

  • January 15, 2013
    logbook: Neutron scattering
    In the 1940s, researchers discovered that neutrons could serve as tools for measuring nuclear properties and determining the atomic and magnetic structures of materials.

November 2012

  • November 21, 2012
    logbook: Cosmic rays
    Enrico Fermi's notebook of December 1948 contains four pages that represent the genesis of his theory of cosmic rays, particles that can hit the Earth's atmosphere at high speeds. In these pages, he worked out the acceleration of cosmic rays due to a series of collisions with magnetic clouds moving through the universe, a process later named Fermi acceleration.

February 2012

  • February 1, 2012
    logbook: W precision measurement
    The W boson mass is one of the fundamental ingredients that scientists use to calculate particle physics properties, such as the most likely mass of the soughtafter Higgs particle.

October 2011

  • October 1, 2011
    logbook: Cyclotron patent
    On January 26, 1932, Ernest Lawrence applied for a patent on the cyclotron.

May 2011

  • May 1, 2011
    logbook: Protein structure
    Today, scientists at 22 synchrotron light sources are analyzing protein structures, and the worldwide Protein Data Bank contains the structures of more than 72,000 proteins.

February 2011

  • February 1, 2011
    logbook: OPERA’s first tau neutrino
    On May 31, 2010, at Gran Sasso National Laboratory in Italy, Antonio Ereditato, spokesperson of the OPERA (Oscillation Project with Emulsion tRacking Apparatus) experiment, reported to the scientific community the detection of the first candidate event for the appearance of a tau neutrino in a beam of muon neutrinos, a sought-after sign for neutrino oscillations.

October 2010

  • October 1, 2010
    logbook: First Tevatron collision
    At 3:10 a.m. on October 13, 1985, scientists with the Collider Detector at Fermilab experiment informed the main control room that they had observed the Tevatron collider's first antiproton– proton collision.

August 2010

  • August 1, 2010
    logbook: Strong focusing
    In the summer of 1952, physicists at Brookhaven National Laboratory's Cosmotron particle accelerator were preparing for a visit from scientists planning their own, more powerful, accelerator at a new European lab called CERN. Eager to impress their guests, the team began brainstorming ways to improve accelerator design.

June 2010

  • June 1, 2010
    logbook: CERN touch screen
    On March 11, 1972 CERN engineer Bent Stumpe proposed a new type of interactive computer display for controlling the lab's new Super Proton Synchrotron accelerator.

April 2010

  • April 1, 2010
    logbook: Nobel meeting
    Toward the end of June 1962, a virtual pantheon of modern physics descended on a tiny island just off the shores of Lake Constance, in Germany’s rolling Bavarian countryside.

February 2010

  • February 1, 2010
    logbook: Neutrino oscillation
    In June 1998, Takaaki Kajita of the University of Tokyo presented strong evidence that neutrinos behave differently than predicted by the Standard Model of particles: The three known types of neutrinos apparently transform into each other, a phenomenon known as oscillation.

December 2009

  • December 1, 2009
    logbook: The shortest report
    On April 28, 1947 Stanford Linear Electron Accelerator Project Report No. 7 announced the realization of a dream 15 years in the making: the linear acceleration of electrons.

October 2009

  • October 1, 2009
    logbook: Antiproton discovery
    When the Bevatron switched on at Lawrence Berkeley National Laboratory in the fall of 1954, it was the largest particle accelerator ever built, capable of producing energies upwards of six billion electronvolts.

August 2009

  • August 1, 2009
    logbook: Weak neutral current
    The Gargamelle collaboration at the European laboratory CERN began operating its bubble chamber in the early 1970s, shooting neutrinos through 12,000 liters of Freon, a heavy liquid. Cameras took photos from various angles every time a pulse of neutrinos traversed the five-meter-long bubble chamber.

July 2009

  • July 1, 2009
    logbook: Pierre Auger Observatory
    In 1991, James Cronin travelled to Leeds, England, to visit Alan Watson, an expert on cosmic-ray physics. Cronin, a Nobel Prize winner in physics who had worked on accelerator-based particle physics experiments, wanted to discuss ideas for cosmic-ray projects. Inspired by a proposal by Russian physicist Georgiǐ Khristiansen, he was eager to see the construction of a large array of detectors to unravel the mysteries of the highest-energy cosmic rays in the universe.

May 2009

  • May 1, 2009
    logbook: Earth’s radiation belts
    James Van Allen barely had time to savor the launch of America's first satellite, Explorer I, on Jan. 31, 1958, when scientists at the Jet Propulsion Laboratory told him the Geiger tube cosmic-ray detector his team had built wasn’t working. The instrument kept blanking out, leaving baffling gaps in the data transmitted to radio stations on Earth.

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