Glueball candidate particle event

Glueball candidate particle event

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Caption: Electronic display of a "glueball" candidate event seen in the Multiparticle Spectrometer (MPS) detector at the Brookhaven National Laboratory, Long Island. A negative pion has collided with a proton in the detector's target at far left & produced two phi mesons and a neutron; the track of the neutron is not visible because it is not a charged particle; the two phi mesons have each decayed (at a vertex marked by the large X at the left of each view) into a positive & a negative kaon; one phi meson has decayed into the kaons with the yellow & green tracks, the other into the kaons with the blue & red tracks. Phi mesons are difficult to produce in particle physics, & the MPS experiment is seeing 100 times more of them than theory predicts; the physicists involved, led by Prof. Sam Lindenbaum, believe that "glueballs" are the simplest explanation, though this is

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Keywords: brookhaven national lab, computer screen, electronic display, glueball, kaon, laboratory, mps spectrometer, particle physics research, phi meson

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