About three million hadronic decays of the Z collected by ALEPH in the years 1991 to 1994 are used to search for anomalous Cp violation beyond the Standard Model in the decay Z-->b(b) over barg$. The study is performed by analyzing angular correlations between the two quarks and the gluon in three-jet events and by measuring the differential two-jet rate. No signal of CP violation is found. For the combinations of anomalous CP violating couplings, (h) over cap(b)$=<(h)over cap (Ab)g(Vb)>-<(h)over cap (Vb)g(Ab)> and h(b)*=root<(h)over cap (2)(Vb)>+<(h)over cap (2)(Ab)>, limits of \(h) over cap(b)$\<0.59 and h(b)*<3.02 are given at 95% CL.

Search for CP violation in the decay Z->b(b)over bar g

BATIGNANI, GIOVANNI;BETTARINI, STEFANO;CIOCCI, MARIA AGNESE;FERRANTE, ISIDORO;FORTI, FRANCESCO;GIORGI, MARCELLO;MESSINEO, ALBERTO MARIA;RIZZO, GIULIANA;TONELLI, GUIDO EMILIO;
1996-01-01

Abstract

About three million hadronic decays of the Z collected by ALEPH in the years 1991 to 1994 are used to search for anomalous Cp violation beyond the Standard Model in the decay Z-->b(b) over barg$. The study is performed by analyzing angular correlations between the two quarks and the gluon in three-jet events and by measuring the differential two-jet rate. No signal of CP violation is found. For the combinations of anomalous CP violating couplings, (h) over cap(b)$=<(h)over cap (Ab)g(Vb)>-<(h)over cap (Vb)g(Ab)> and h(b)*=root<(h)over cap (2)(Vb)>+<(h)over cap (2)(Ab)>, limits of \(h) over cap(b)$\<0.59 and h(b)*<3.02 are given at 95% CL.
1996
D., Buskulic; I., Debonis; D., Decamp; P., Ghez; C., Goy; J. P., Lees; A., Lucotte; M. N., Minard; J. Y., Nief; P., Odier; B., Pietrzyk; M. P., Casado...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828589
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