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

Journal Article · Wed Dec 01 00:00:00 EST 2004 · Phys.Rev.Lett.93:262001,2005

DOI:https://doi.org/10.1103/PhysRevLett.93.262001· OSTI ID:15017332

Holmstrom, T; Leros, N; Burnstein, R A; Chakravorty, A; Chan, A; Chen, Y C; Choong, W S; Clark, K; Dukes, E C; Durandet, C; Felix, J; Fu, Y; Gidal, G; Gu, P; Gustafson, H R; Ho, C; Huang, M; James, C; Jenkins, C M; Jones, T ; Kaplan, D M

The authors have compared the p and {bar p} angular distributions in 117 million {Xi}{sup -} {yields} {Lambda}{pi}{sup -} {yields} p{pi}{sup -}{pi}{sup -} and 41 million {Xi}{sup +} {yields} {bar {Lambda}}{pi}{sup +} {yields} {bar p}{pi}{sup +}{pi}{sup +} decays using a subset of the data from the HyperCP experiment (ES71) at Fermilab. They find no evidence of CP violation, with the direct-CP-violating parameter A{sub {Xi}{Lambda}} {triple_bond} (a{sub {Xi}}a{sub {Lambda}} - {bar a}{sub {Xi}}{bar a}{sub {Lambda}})/(a{sub {Xi}}a{sub {Lambda}} + {bar a}{sub {Xi}}{bar a}{sub {Lambda}}) = [0.0 {+-} 5.1(stat) {+-} 4.4(syst)] x 10{sup -4}.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 15017332
• Report Number(s): FERMILAB-PUB-04-400-E; arXiv eprint number hep-ex/0412038; TRN: US0605213
• Journal Information: Phys.Rev.Lett.93:262001,2005, Journal Name: Phys.Rev.Lett.93:262001,2005
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANGULAR DISTRIBUTION
FERMILAB
HYPERONS
Experiment-HEP