Measurement of the CP-Violation Parameter eta +- gamma in Neutral Kaon Decays.

Measurement of the CP-Violation Parameter eta +- gamma in Neutral Kaon Decays.
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中性 Kaon 衰变中 CP 破坏参数 eta - gamma 的测量。

DOI:
10.1103/physrevlett.70.2529
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发表时间:
1992
期刊:
影响因子:
--
通讯作者:
B. Vallage
B. Vallage
中科院分区:
--
文献类型:
--
作者:
E. Ramberg;G. Bock;R. Coleman;J. Enagonio;Y. Hsiung;K. Stanfield;R. Tschirhart;T. Yamanaka;E. Swallow;G. Blair;G. Gollin;M. Karlsson;J. Okamitsu;P. Debu;B. Peyaud;R. Turlay;B. Vallage

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在费米实验室的731实验中观察到末态π + π - γ的KS和KL衰变之间的干涉。通过对回热器下游衰变分布的拟合,测得了一个新的CP破坏参量η +-γ,其大小为(2.15±0.26±0.20)×10 - 3,相位角Φ +-γ为(72±23±17)°
Interference between K S and K L decays info the final state π + π - γ has been observed in experiment 731 at Fermilab. By fitting the distribution of decays downstream of a regenerator, a new CP-violation paramefer η +-γ , analogous to η +- , has been measured, with its magnitude equal to (2.15±0.26±0.20)×10 -3 , and Φ +-γ , the associated phase angle, equal to (72±23±17)°