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 bar. 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.

D., B., I., D., D., D., P., G., C., G., J. P., L., et al. (1996). Search for CP violation in the decay Z->b(b)over bar g. PHYSICS LETTERS. SECTION B, 384, 365-376 [10.1016/0370-2693(96)00927-6].

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

CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
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 bar. 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., B., I., D., D., D., P., G., C., G., J. P., L., et al. (1996). Search for CP violation in the decay Z->b(b)over bar g. PHYSICS LETTERS. SECTION B, 384, 365-376 [10.1016/0370-2693(96)00927-6].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/38501
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo