Search for CP violation in charged-Xi and Lambda hyperon decays - INSPIRE

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Search for CP violation in charged-Xi and Lambda hyperon decays

HyperCP

Collaboration

•

T. Holmstrom
(
- Virginia U.
)

Dec, 2004

4 pages

Published in:

Phys.Rev.Lett. 93 (2004) 262001

e-Print:

hep-ex/0412038 [hep-ex]

DOI:

10.1103/PhysRevLett.93.262001

PDG: {[\alpha\mathrm {({{\mathit \Xi}^{-}})}\alpha_-({{\mathit \Lambda}}) − \alpha\mathrm {({{\overline{\mathit \Xi}}^{+}})}\alpha_+({{\overline{\mathit \Lambda}}})]\over [\alpha\mathrm {({{\mathit \Xi}^{-}})}\alpha_-({{\mathit \Lambda}}) + \alpha\mathrm {({{\overline{\mathit \Xi}}^{+}})}\alpha_+({{\overline{\mathit \Lambda}}})]}

Report number:

FERMILAB-PUB-04-400-E

Experiments:

FNAL-E-0871

View in:

reference search48 citations

Citations per year

Abstract:

We have compared the proton and antiproton angular distributions in 117 million Xi-minus -> Lambda + pi-minus -> proton + pi-minus + pi-minus and 41 million anti-Xi-minus -> anti-Lamba + pi-plus -> antiproton + pi-plus + pi-plus decays using a subset of the data from the HyperCP experiment (E871) at Fermilab. We find no evidence of CP violation, with the direct-CP-violating parameter

A_{\Xi\Lambda} = \frac{\alpha_{\Xi}\alpha_{\Lambda} - \bar{\alpha}_{\Xi}\bar{\alpha}_{\Lambda}}{\alpha_{\Xi}\alpha_{\Lambda} + \bar{\alpha}_{\Xi}\bar{\alpha}_{\Lambda}} = [0.0+/-5.1(stat)+/-4.4(syst)]{\times}10^{-4}

.

11.30.Er
13.30.Eg
14.20.Jn
p nucleus: inclusive reaction
copper
hyperon: hadroproduction
hyperon: hadronic decay
Xi-
Antixi-
asymmetry: CP

References(20)

Figures(0)

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