negative pion

negative pion

[′neg·əd·iv ′pī‚än]
(particle physics)
A pion having a negative electric charge.
References in periodicals archive ?
We have calculated the number of positive and negative kaons and the number of positive and negative pions from the generated output of the UrQMD and DPMJET III model for all the energies.
The researchers determine the fireball's nature and geometry by studying how quickly it emits pairs of negative pions as it cools.
For higher BES beam energies ([square root of ([s.sub.NN])] = 27 GeV and 39 GeV), the STAR data show no significant asymmetry between positive and negative pions at low [p.sub.T] and it is not possible to obtain information related to the Coulomb interaction from those data.