Elsevier

Nuclear Physics B

Volume 47, Issue 1, 1 October 1972, Pages 51-60
Nuclear Physics B

Tests of s-and t-channel helicity conservation in pπ+ π, Kπ+π and π±π+π production in 16 GeV/c π±p and 10 GeV/c Kp interactions

https://doi.org/10.1016/0550-3213(72)90100-9Get rights and content

Abstract

Necessary conditions for s-and t-channel helicity conservation are tested for pπ+π, Kπ+π and π±π+π states produced in 16 GeV/c π±p and 10 GeV/c Kp interactions by means of a method which is independent of specific spin-parity assignments to these states. It is found that the production of pπ+π states is generally consistent with t-channel helicity conservation for masses up to 2.4 GeV, but that for π±π+π and Kπ+π some inconsistency with t-channel helicity conservation is found, primarily in the A1± and Q mass regions. s-channel helicity conservation is excluded for all states.

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On leave of absence from the university of Nebraska, Lincoln, Nebraska.

∗∗

Now at Physikalisches Institut der Universität, Bonn.

∗∗∗

Now at Institut für Hochenergiephysik der Österreichischen Akademie der Wissenschaften, Vienna.

Now at Institut für Hochenergiephysik der Deutschen Akademie der Wissenschaften zu Berlin, Zeuthen.

CERN Fellow from the University of Athens.

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