The pentaquark discovered?

Discussion in 'General Science' started by Wendy, Mar 4, 2016.

  1. Wendy

    Thread Starter Moderator

    Mar 24, 2008
  2. tracecom

    AAC Fanatic!

    Apr 16, 2010

    "The announcement is the latest chapter in a somewhat dubious story of now-you-see-now-you-don’t discovery. In 2002, scientists in Japan announced the discovery of a particle with a mass about 1.5 times that of a proton. They called it the Θ+, and argued that it was a kind of pentaquark. This announcement triggered a flurry of searches by other groups of experimenters, with some groups confirming the Θ+ and finding other particles that were claimed to be different pentaquark candidates, while other researchers found no evidence for any new particles at all. The excitement continued for three years until 2005, when the community decided that the original announcement was wrong. The death knell of the Θ+ sounded when a group of scientists at the Thomas Jefferson National Accelerator Facility (TJNAF) in Newport News, Virginia, repeated the initial Japanese measurement with far more data. The TJNAF scientists saw no evidence for the existence of the Θ+, and the community consigned it to the dustbin of history as one of many particle “discoveries” that ultimately didn’t pan out."
  3. scheua

    New Member

    Mar 17, 2016
    Didn't they just discover tetraquarks? Anyway, what does it mean for us ordinary tri-quark beings? Is it possible that Dark Matter consists of n-quarks with n > 3?