Large transverse momenta selection to enhance high-mass resonances

For high-mass resonances, the signal to noise ratio is substantially improved when those combinations of the decay particles are selected in which one or more particles have large transverse momenta. For example, in the reaction π +p→p π + π + π − at 16 GeV/ c, the g 0 meson is enhanced with respect...

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Published in:Nuclear physics. B 1976-01, Vol.114 (2), p.237-251
Main Authors: Deutschmann, M., Grässler, H., Kirk, H.G., Laven, H., Sixel, P., Nahnhauer, R., Vogt, H., Hartmann, R., Hofmann, J., Counihan, M.J., Kocher, D.J., Morrison, D.R.O., Triantis, F., Wernhard, K.L., Leitner, E., Stiewe, J., Barnham, K.W.J., Eason, R., Buscbeck, B., MacNaughton, J.N.
Format: Article
Language:English
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Summary:For high-mass resonances, the signal to noise ratio is substantially improved when those combinations of the decay particles are selected in which one or more particles have large transverse momenta. For example, in the reaction π +p→p π + π + π − at 16 GeV/ c, the g 0 meson is enhanced with respect to the background when the decay pions are required to have p T > 0.5 GeV/ c. Utilizing this method, we find evidence for a structure in the 3-pion invariant mass spectrum at approximately 1.8 GeV, while additional evidence is given for a broad structure in the K − π + invariant mass spectrum between 1.7 and 2.0 GeV.
ISSN:0550-3213
1873-1562
DOI:10.1016/0550-3213(76)90587-3