Search for the particles with fractional charges (quarks) at IHEP 70 GeV accelerator

The results of an experiment searching for quarks with charge from 2 3 e to 1 3 e , that are generated by 70 GeV protons on the Al target at zero angle, are reported. In the range of masses available at the IHEP accelerator quarks were not found. The upper limit estimation of the differential cross-...

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Bibliographic Details
Published in:Physics letters. B 1969-01, Vol.29 (4), p.245-248
Main Authors: Antipov, Yu.M., Karpov, I.I., Khromov, V.P., Landsberg, L.G., Lapshin, V.G., Lebedev, A.A., Morosov, A.G., Prokoshkin, Yu.D., Rodnov, Yu.V., Tybakov, V.A., Rykalin, V.A., Senko, V.A., Utochkin, B.A., Vishnevsky, N.K., Yetch, F.A., Zajtzev, A.M.
Format: Article
Language:English
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Summary:The results of an experiment searching for quarks with charge from 2 3 e to 1 3 e , that are generated by 70 GeV protons on the Al target at zero angle, are reported. In the range of masses available at the IHEP accelerator quarks were not found. The upper limit estimation of the differential cross-section of quark production with mass ⪅ 5 GeV/ c 2 and the charge 2 3 e equals to 7–9 × 10 −36 cm 2/ ster GeV/ c (90% confidence level). Total cross-section of quark production with charge 2 3 e and mass 5−5 GeV/ c 2 does not exceed 4 × 10 −37 cm 2.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(69)90156-7