Published March 15, 1990
| Version v1
Journal article
A measurement of the phases of the CP-violating amplitudes in K0→2π decays and a test of CPT invariance
Creators
- Carosi, R.1
- Clarke, P.1
- Coward, D.1
- Cundy, D.1
- Doble, N.1
- Gatignon, L.1
- Gibson, V.1
- Grafstroem, P.1
- Hagelberg, R.1
- Kesseler, G.1
- Lans, J. van der1
- Nelson, H.N.1
- Wahl, H.1
- Black, R.2
- Candlin, D.J.2
- Muir, J.2
- Peach, K.J.2
- Bluemer, H.3
- Heinz, R.3
- Kasemann, M.3
- Kleinknecht, K.3
- Mayer, P.3
- Panzer, B.3
- Renk, B.3
- Roehn, S.3
- Rohrer, H.3
- Auge, E.4
- Chase, R.L.4
- Fournier, D.4
- Heusse, P.4
- Iconomidou-Fayard, L.4
- Harrus, I.4
- Lutz, A.M.4
- Schaffer, A.C.4
- Bertanza, L.5
- Bigi, A.5
- Calafiura, P.5
- Calvetti, M.5
- Casali, R.5
- Cerri, C.5
- Fantechi, R.5
- Gargani, G.5
- Mannelli, I.5
- Nappi, A.5
- Pierazzini, G.M.5
- Becker, C.6
- Burkhardt, H.6
- Holder, M.6
- Quast, G.6
- Rost, M.6
- Sander, H.G.6
- Weihs, W.6
- Zech, G.6
- 1. European Organization for Nuclear Research, Geneva (Switzerland)
- 2. Edinburgh Univ. (UK). Dept. of Physics
- 3. Mainz Univ. (Germany, F.R.). Inst. fuer Physik
- 4. Paris-11 Univ., 91 - Orsay (France). Lab. de l'Accelerateur Lineaire
- 5. Istituto Nazionale di Fisica Nucleare, Pisa (Italy). Dipartimento di Fisica
- 6. Siegen Univ. (Gesamthochschule) (Germany, F.R.). Fachbereich 7 - Physik
Description
The phases of the CP-violating amplitudes in K0 → π+π- and K0→2π0 decays, Φ+-=46.9deg±2.2deg and Φ00=47.1deg±2.8deg, have been measured in the same experiment, and a direct comparison gives the phase difference Φ00-Φ+-=0.2deg±2.9deg. This result leads to an upper limit on possible CPT violation in the K0 mass matrix of vertical stroke(mK0-mK0)/mK0vertical stroke<5x10-18 at the 95% confidence level and is the most stringent test of the equality of particle and antiparticle masses. (orig.)
Additional details
Publishing Information
- Journal Title
- Physics Letters, (Section) B
- Journal Volume
- 237
- Journal Issue
- 2
- Series
- Phys. Lett., B.
- Journal Page Range
- 303-312
- ISSN
- 0370-2693
- CODEN
- PYLBA
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Netherlands
- INIS RN
- 21048555
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANTIKAONS NEUTRAL; CP INVARIANCE; CPT THEOREM; DECAY AMPLITUDES; EXPERIMENTAL DATA; FLAVOR MODEL; KAONS NEUTRAL; LIMITING VALUES; MASS FORMULAE; MATRICES; MATRIX ELEMENTS; PHASE SHIFT; REST MASS; SYMMETRY BREAKING; WEAK HADRONIC DECAY
- Descriptors DEC
- AMPLITUDES; ANTIKAONS; ANTIMATTER; ANTIPARTICLES; BOSONS; COMPOSITE MODELS; DATA; DECAY; ELEMENTARY PARTICLES; HADRONS; INFORMATION; INVARIANCE PRINCIPLES; KAONS; MASS; MATHEMATICAL MODELS; MATTER; MESONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE MODELS; PSEUDOSCALAR MESONS; QUARK MODEL; STRANGE MESONS; STRANGE PARTICLES; TRANSITION AMPLITUDES; WEAK PARTICLE DECAY
Optional Information
- Contract/Grant/Project number
- Contract DE-AC03-76SF00515; BMFT 054Mz18; BMFT 054Si74