Published March 1999
| Version v1
Journal article
Search for direct CP violation in Λ and Ξ hyperon decays
Creators
- White, C. G.
- Burnstein, R. A.
- Carmack, M.
- Chakravorty, A.
- Chan, A.
- Chen, Y. C.
- Choong, W. S.
- Clark, K.
- Crisler, M.
- Drapala, J.
- Dukes, E. C.
- Durandet, C.
- Felix, J.
- Gidal, G.
- Gustafson, H. R.
- Ho, C.
- Holmstrom, T.
- Huang, M.
- James, C.
- Jenkins, M.
- Kaplan, D. M.
- Kou, Z.
- Lederman, L. M.
- Leros, N.
- Longo, M. J.
- Lopez, F.
- Lopez, G.
- Luebke, W.
- Luk, K. B.
- Nelson, K.
- Papavassiliou, V.
- Perroud, J. P.
- Rajaram, D.
- Rubin, H. A.
- Saleh, N.
- Sheng, J.
- Sosa, M.
- Teng, P. K.
- Turko, B.
- Volk, J.
- White, S. L.
- Yu, C.
- Yu, Z.
- Zyla, P.
Description
A sensitive search for direct CP violation in Υ- (Ξ-bar+) and Λ (Λ-bar) decays is underway at FNAL. Experiment E871 (HyperCP) intends to perform a precision measurement of the angular distribution of protons (anti-protons) with respect to the helicity axis in the rest frame of the Λ (Λ-bar). The slopes of these distributions give the decay parameters αΥαΛ and αΞ-barαΛ-bar. An asymmetry parameter A in terms of these decay parameters has been defined for which a non-zero value would be unambiguous evidence for direct CP violation. Theoretical predictions for A range from no asymmetry up to ∼ 10-3. HyperCP expects to measure A with an uncertainty of ∼ 2 x 10-4
Additional details
Identifiers
- PII
- S0920563298003776;
Publishing Information
- Journal Title
- Nuclear Physics. B, Proceedings Supplements
- Journal Volume
- 71
- Journal Issue
- 1-3
- Journal Page Range
- p. 451-456
- ISSN
- 0920-5632
- CODEN
- NPBSE7
Conference
- Title
- 27. international symposium on multiparticle dynamics
- Dates
- 8-12 Sep 1997
- Place
- Frascati (Italy)
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 34064339
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ANGULAR DISTRIBUTION; ANTIPARTICLES; ANTIPROTONS; ASYMMETRY; CP INVARIANCE; DATA ACQUISITION; LABORATORY EQUIPMENT; LAMBDA BARYONS; PARTICLE DECAY; PROTONS; SPECTROMETERS; SYMMETRY BREAKING; XI BARYONS
- Descriptors DEC
- ANTIBARYONS; ANTIMATTER; ANTINUCLEI; ANTINUCLEONS; ANTIPARTICLES; BARYONS; DECAY; DISTRIBUTION; ELEMENTARY PARTICLES; EQUIPMENT; FERMIONS; HADRONS; HYPERONS; INVARIANCE PRINCIPLES; MATTER; MEASURING INSTRUMENTS; NUCLEI; NUCLEONS; PROTONS; STRANGE PARTICLES
Optional Information
- Copyright
- Copyright (c) 1999 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.